          United States Court of Appeals
                     For the First Circuit


Nos. 11-1660,
     11-1742

                    UNITED STATES OF AMERICA,

                            Appellee,

                               v.

                     RAQUEL DELGADO-MARRERO,
                    ÁNGEL L. RIVERA-CLAUDIO,

                     Defendants, Appellees.



          APPEALS FROM THE UNITED STATES DISTRICT COURT
                 FOR THE DISTRICT OF PUERTO RICO

         [Hon. José Antonio Fusté, U.S. District Judge]


                             Before

                 Torruella, Howard and Thompson,
                         Circuit Judges.


     Rafael F. Castro-Lang, for appellant Delgado.
     Linda Backiel, for appellant Rivera.
     Jacqueline D. Novas-Debién, Assistant United States Attorney,
with whom Rosa Emilia Rodríguez-Vélez, United States Attorney,
Nelson Pérez-Sosa, Assistant United States Attorney, Chief,
Appellate Division, and Luke Cass, Assistant United States
Attorney, were on brief for appellee.



                        February 11, 2014
             TORRUELLA, Circuit Judge.           Former San Juan Municipal

Police    Officers    Raquel   Delgado-Marrero         ("Delgado")       and    Ángel

Rivera-Claudio ("Rivera") were convicted by a jury on drug and gun

charges    arising    from   an   FBI    reverse      sting    operation       called

"Operation    Guard    Shack."      They      each   received      a   fifteen-year

sentence. On appeal, Delgado and Rivera raise multiple challenges,

claiming both trial and sentencing errors by the district court.

They each seek either a new trial or resentencing.

             Our discussion begins with Delgado's contention that the

district    court     committed    reversible        error    by   excluding      the

testimony of a defense witness. Because we agree with Delgado that

the district court erred on this front, and that a new trial is

needed to mend the error, we do not address any of her other

appellate challenges.

             With respect to Rivera, we agree that his sentence cannot

withstand the Supreme Court's decision in Alleyne v. United States,

133 S. Ct. 2151 (2013).          Applying Alleyne retroactively, we find

that the district court plainly erred in articulating the jury

instructions imparted in connection with a post-verdict special

jury form.     We further find that Rivera's other claims of error

ultimately fail.

             The necessary details follow, with a recitation of "the

facts in the light most favorable to the government."                          United

States v. Flores-Rivera, 56 F.3d 319, 322 (1st Cir. 1995).


                                        -2-
                               I. Background

A. Operation Guard Shack

          The FBI launched "Operation Guard Shack" as part of its

efforts to combat police corruption throughout Puerto Rico.1               As

relevant here, the FBI hired a Puerto Rico Police officer ("Officer

I") to pose undercover as a corrupt policeman with close ties to a

mid-to-high-level     local    drug     dealer.2         Officer   I's   main

responsibility was to recruit fellow police officers willing to

provide   armed     security   during       a   staged   "multi-kilo"    drug

transaction.      The FBI also hired another undercover Puerto Rico

Police officer, "Officer II," to play the role of the dealer during

the staged drug transaction.

          Delgado and Rivera were working partners stationed at the

Antillas Police Precinct in San Juan, Puerto Rico.                 Delgado, a



1
   According to an official press release issued by the United
States Justice Department, Operation Guard Shack was "the largest
police corruption investigation in the history of the FBI," and
involved "125 undercover drug transactions conducted . . . in
several locations in Puerto Rico, from July 2008 until September
2010."   The operation yielded 26 indictments against 89 law
enforcement officers and 44 other civilians.
2
  To protect their identities, we omit all references to the names
of the undercover agents involved in the case.             For his
participation in Operation Guard Shack, Officer I received $1,400
monthly, but his contract with the FBI was subject to a six-month
review and could be terminated at will.        Officer I was also
provided with "expensive" cars in order to portray the image of a
corrupt officer who had money to spend. At the time Officer I
contracted with the FBI, his entire salary from the Puerto Rico
Police Department was being garnished on account of a child support
debt.

                                      -3-
divorced mother of two, had no prior criminal record.             She began

her career as a municipal police officer in her late twenties.

Before her arrest in 2010, Delgado had enjoyed five years of

experience    on   the   force,   had   never   been   the   subject   of   an

administrative complaint, and had received the award of "Municipal

Police Woman of 2009."      For his part, Rivera, who was twenty-four

years old at the time of his arrest, enjoyed four years of

experience in the municipal police force and, like Delgado, had

untarnished criminal and administrative records.

             Officer I reached out to Delgado sometime in the middle

of 2009 as part of his undercover role as a corrupt policeman.

Officer I knew Delgado from childhood.            They grew up near each

other, were middle-school classmates, and had once shared a close-

knit circle of friends.       After middle school, however, Officer I

and Delgado went their separate ways and eventually lost touch with

each other.

             More than a decade later, Officer I identified Delgado as

a possible target of Operation Guard Shack during a conversation

with her ex-husband, who had asked to meet with him for an

unrelated personal matter.3        During the meeting, when Officer I

asked about Delgado, her ex-husband told him that they were no


3
   Delgado's ex-husband was also a municipal police officer whom
Officer I knew from childhood. He met with Officer I to discuss
drug-related problems in his neighborhood and to ask if more
patrolling could be provided. The ex-husband's current spouse was
present during the meeting.

                                    -4-
longer   together       and     that    Delgado    had    several   part-time         jobs

providing nighttime door security at veterinarian clinics as well

as some pubs.        Delgado's ex-husband also shared with Officer I his

distaste       for   Delgado's       part-time     jobs,    stating      that    he    was

concerned that the jobs were in unsafe locations. According to his

testimony at trial, Officer I understood the ex-husband's concerns

to    mean   that     Delgado    was    part-timing        in   places   where       drug-

trafficking activities occurred.

               Officer I asked for Delgado's phone number during a

second meeting with her ex-husband. Soon thereafter, he called her

to see whether she was in fact doing part-time jobs at questionable

locations.           Although     the        FBI   had    instructed      that       phone

conversations with Operation Guard Shack targets be recorded,4

Officer I testified at trial that he was unable to record the first

call with Delgado because he made it while on duty, with fellow

officers nearby.        Another unrecorded phone call took place shortly

thereafter; Officer I testified that he could not record that

conversation because some of his family members were nearby when he

placed the call.

               Officer I recorded a phone conversation with Delgado for

the    first    time    on    July     20,    2009.       The   transcript      of    that

conversation         reflects    that    Officer      I   had   previously       invited



4
  The FBI provided Officer I with special recording equipment for
this purpose.

                                             -5-
Delgado, and she had agreed, to participate in a drug transaction,

in which Delgado and an unnamed fellow officer5 would provide

security in exchange for $2,000 each.6

           Officer I recorded a second call with Delgado on July 23,

2009.   This time, as depicted in the call's transcript, Officer I

explained to Delgado that the transaction would take place inside

a house; that Delgado and the fellow officer's job was simply to

frisk two people that would come to pick up the "kilos"; that the

job would begin at 8:00 p.m. and would last thirty minutes to an

hour; and that Officer I would personally direct Delgado on how to

get to the house.

B. The Sham Transaction

           The sham drug transaction took place the next day.   With

the assistance of Officer I, who provided final minute-by-minute

directions by phone, Delgado and Rivera arrived at the apartment in

the municipality of Dorado, Puerto Rico, where the "transaction"

was to take place.      Officer I and Officer II waited in the

apartment, where the FBI had placed hidden cameras and microphones

in order to record the events.7   Also in the apartment was a duffle


5
    The fellow officer turned out to be Rivera, whom Delgado
convinced to accompany her during the transaction.
6
    Neither the word "drug" nor any specific type of drug was
mentioned during the conversation, but Delgado testified at trial
that she assumed the transaction involved drugs.
7
    A crew of FBI agents controlled the hidden equipment and
monitored the events from an apartment next door.

                                  -6-
bag containing the purported drugs underlying the sham transaction

-- seven packages, or "bricks," that the FBI had prepared to

resemble one-kilogram blocks of actual cocaine.

          The video recording of the "transaction" begins when

Delgado and Rivera step into the apartment.     Officer I, Delgado,

and Rivera enter in full view of a hidden camera that was recording

the entry door and foyer area of the apartment.   To the left of the

entry door is a kitchen, and Officer I offers drinks to Delgado and

Rivera.   Delgado takes a soda and Rivera a beer.    Officer I then

ushers them into a living room, where Officer II, in his role as a

drug dealer, sits in the middle of a large L-shaped sectional sofa.

          Another hidden camera captures the moment when Officer I,

Delgado, and Rivera come into the living room.        Officer I and

Rivera sit on the sofa where Officer II awaits seated.      Delgado

asks where the bathroom is and steps out of the camera's range.

          While Delgado is in the bathroom, Officer I and Officer

II engage Rivera in friendly banter.    Among other things, they ask

Rivera about the type of gun given to the municipal police. Rivera

states that he dislikes the old, secondhand gun he was provided,

and, upon further probing from Officer I, retrieves the gun from

underneath his jacket, waves it in the air so that the others can

see it, and tucks it back in.   Officer I and Officer II also show

Rivera the gun each is carrying.      When Delgado returns from the

bathroom, the gun-related discussion continues, and she also shows


                                -7-
her official gun, which she was carrying inside her waistband,

hidden underneath her shirt.      Delgado then sits down on the sofa

between Rivera and Officer II.

           The friendly banter continues for half an hour, including

remarks about Delgado's birthday party, which is happening later

that night.   The   conversation is interrupted when the purported

drug buyer knocks at the door.8    Immediately, Officer II instructs

Rivera to open the door and to make sure that nobody enters the

apartment armed.    Rivera picks up a set of keys from the coffee

table in front of the sofa and leaves to open the door.    Officer I

gets up and signals Delgado to follow him in order to assist

Rivera.   She gets up and follows Officer I out of the living room.

           The hidden camera recording the area of the entry door

captures Rivera approaching.      He opens the door and orders the

purported drug buyer to stand still and proceeds to frisk him.9

Finding no weapons on the newcomer, Rivera walks him to the living

room.   There, the purported buyer greets Officer II and sits down

on the sofa, and Officer I and Rivera return to their seats.

Delgado remains standing and goes in and out of the camera's frame,



8
   Another undercover agent ("Officer III") plays the part of the
buyer.
9
   Although not seen on the video footage provided to us,    another
hidden camera apparently captured Officer I and Delgado       in the
hallway watching Rivera frisking the purported drug buyer.   Officer
I's trial testimony corroborated that they were in the       hallway
watching Rivera.

                                  -8-
but her voice can sometimes be heard as she participates in the

conversation.

           The friendly banter continues exactly where it left off.

It is interrupted approximately fifteen minutes later, when the

purported buyer tells Officer II to bring him the "stuff" because

he is leaving.    Officer II then casually tells Rivera to call an

elevator   that   is   apparently    nearby,   while   at    the   same   time

signaling to him the direction of the elevator he is referring to.

Rivera gets up from the sofa and walks away from the hidden

camera's view.    Officer II then tells Rivera, who is still out of

view but apparently in the living room, to wait for the elevator

doors to open and to hand what is inside the elevator to the buyer.

A few seconds later, Rivera comes back carrying a duffle bag.               He

hands it to the buyer, and sits down on the sofa next to him.

           Though the coffee table in front of the sofa blocks the

camera's view, it appears that the purported buyer places the bag

on the floor, between his legs, and opens it.                  He takes two

packages out of the bag and stacks them on top of the coffee table.

He does the same with two additional packages.              He next seems to

fiddle with something in the bag.          Rivera remains seated to the

right of the buyer.     Delgado is still standing and does not appear

in the video at this moment.        One of Delgado's hands, which holds

a cellular phone, comes into the camera's frame briefly a few




                                     -9-
times.    Her voice can also be heard during the conversation, so it

is safe to conclude that she remains somewhere in the living room.

            The jovial atmosphere continues.   Approximately a minute

after placing the four packages on the coffee table, the purported

buyer places them back into the duffle bag, closes it, stands up,

places the carrying strap of the bag on his left shoulder, shakes

hands with everyone, and walks to the entry door escorted by

Rivera.    Delgado stays in the living room chatting with Officer I

and Officer II.   When Rivera returns, Delgado goes to the bathroom

a second time.

            A new round of banter begins with Rivera, Officer I, and

Officer II sitting around the sofa.      Delgado joins in when she

returns from the bathroom, though her attention often centers on

her cellular phone, as she appears to be exchanging text messages

with someone.     A few minutes into the conversation, Officer II

instructs Officer I to go get the "guys' stuff."     Officer I walks

out of the living room, away from the hidden camera's view.       He

appears back in the video a minute later holding two beers in his

left hand and a stack of money in his right.       He places the two

beers on the coffee table in front of Rivera and Delgado, then sits

down on the sofa to the left of Officer II.        Between jokes and

laughter, Officer I counts the money, eventually handing $1,000 in

$20 bills to Rivera.      Rivera counts the money given to him.

Officer I and Rivera follow the same routine until $4,000 in cash


                                 -10-
exchanges hands.    Upon Officer II's inquiry, Delgado and Rivera

state that they are available to do a second job later on.

          They are still on the sofa, jovially chatting with

Officer I and Officer II, when the video recording from the camera

in the living room cuts off.   The video recording from the hidden

camera in the entry area cuts off around the same time.   One hour

and a few minutes have lapsed since Delgado and Rivera stepped into

the apartment.

C. The Arrest and Trial

          The FBI arrested Delgado and Rivera on October 6, 2010,

pursuant to a four-count indictment.       Count One alleged that

Delgado and Rivera knowingly and intentionally conspired to possess

with intent to distribute five kilograms or more of a substance

containing a detectable amount of cocaine, in violation of 21

U.S.C. §§ 841 and 846.    Count Two charged that Delgado and Rivera

aided and abetted each other in an attempt to possess with intent

to distribute five kilograms or more of a substance containing a

detectable amount of cocaine, in violation of §§ 841 and 846, and

18 U.S.C. § 2.     Counts Three and Four alleged that Delgado and

Rivera, respectively, knowingly possessed a firearm in furtherance

of the drug trafficking crimes charged in Counts One and Two, in

violation of 18 U.S.C. § 924(c)(1)(A).

          At trial, the government presented three witnesses:

Officer I, Officer II, and the FBI special agent (the "Special


                                -11-
Agent") who prepared the apartment and the duffle bag for the

transaction. It also introduced into evidence (1) the two recorded

phone calls between Officer I and Delgado; (2) the video recording

of the transaction; and (3) five pictures of the duffle bag

containing the "bricks" before the FBI placed it in the Dorado

apartment. The government's theory was that the video recording of

the transaction spoke for itself and showed guilt beyond reasonable

doubt on all counts.

             In her defense, Delgado argued entrapment. She presented

her own testimony and the testimony of her ex-husband.        In support

of her entrapment defense, Delgado testified that for approximately

one month, she rejected Officer I's persistent invitations of part-

time employment; that during this period, Officer I called her

repeatedly and sometimes took her out on dates; that she had

romantic, sexual affairs with Officer I in 2005 and 2009; that

weeks after the transaction, Officer I took her out on a date

during which they had sexual intercourse; and that Officer I preyed

on   their   long-lasting   friendship   and   trust   to   overcome   her

expressed and firm resistence to participate in the transaction.

             Despite this reluctance, Delgado testified that she

finally gave into Officer I's insistent pressure.            She further

explained that she contacted her partner, Rivera, and that they

"decided to go to the place" where the part-time job organized by

Officer I was to be held.     She stated that, following directions


                                 -12-
from Officer I, she asked for $2,000 each -- for herself and Rivera

-- in exchange for their roles in the deal; that Rivera drove her

to the apartment depicted in the video; and that the two partners

entered the apartment together with Officer I.              She admitted that

she was aware that the "bricks" involved in the transaction were

narcotics    and   that   she    was    doing   something    wrong,   but   she

maintained that she only participated in the transaction because of

Officer I's insistence, because of the "sentimental or romantic

relationship" she had with him, and because of her trust in him.

            In further support of her entrapment defense, Delgado

sought to present the testimony of Brenda Rosa-Valentín ("Rosa-

Valentín"), the younger sister of a fellow policeman Officer I grew

up with and considered a dear friend.           But on an objection by the

government, the court decided to hear her testimony outside the

presence    of   the   jury,    and    ultimately   ruled    it   inadmissable

extrinsic evidence under Fed. R. Evid. 608(b).

            Rivera neither took the stand nor presented any witnesses

in his defense.10 During opening statements,11 Rivera's counsel told

the jury that he intended to show that Rivera "was not guilty of

conspiracy as charged in the Indictment," and that Rivera had no

intention of participating in the transaction before Officer I



10
     Rivera and Delgado each had their own counsel.
11
    The defendants' opening statements were deferred until the
beginning of their case-in-chief.

                                       -13-
lured Delgado into it. Although the record shows that counsel told

the court that he intended to present a derivative entrapment

defense, the court ultimately did not allow the defense.12

            After a three-day trial, the jury found Delgado and

Rivera    guilty   on   all   counts.          They   were   each   sentenced    to

concurrent terms of ten years on Counts One and Two, corresponding

to the statutory minimum under 21 U.S.C. § 841(b)(1)(A) for

possession with intent to distribute five kilograms or more of

cocaine.     On Counts Three and Four, respectively, Delgado and

Rivera each received a five-year sentence for possession of a

firearm    in   relation      to    a   drug    trafficking     crime,   to     run

consecutively with their ten-year sentences under Counts One and

Two, for total terms of imprisonment of fifteen years each.                   This

consolidated appeal timely ensued.

                                   II. Discussion

A. Delgado's Evidentiary Challenge

            As relevant here, Delgado argues that the district court

committed reversible error in excluding Rosa-Valentín's testimony,

which "prevented [her] from presenting important evidence that


12
    For a discussion of the derivative entrapment defense, see
United States v. Washington, 106 F.3d 983, 992-96 (D.C. Cir. 1997)
(cited by United States v. Luisi, 482 F.3d 43, 52-58 (1st Cir.
2007) (discussing third-party entrapment, and distinguishing
derivative entrapment from vicarious entrapment)).      On appeal,
Rivera does not challenge the district court's determination that
the derivative entrapment defense was unavailable to him. In his
appellate brief, Rivera states that his "only defense" at trial was
the "right to the presumption of innocence."

                                        -14-
[would have] aided . . . in establishing her only defense, that she

was entrapped by [Officer I] in participating in the offense

conduct."      We agree.

               1. Background

               When the defense examined Officer I, the government

objected,      on   relevancy       grounds,    to   a   question    regarding   his

recollection of prior interactions with Rosa-Valentín. At sidebar,

Delgado's counsel proffered that Rosa-Valentín, who was one of

Delgado's witnesses, would testify that Officer I had offered her

money in exchange for providing contact information of policemen to

entrap.        Rosa-Valentín would also testify that Officer I had

confessed to her his desire to kill a man he thought had wronged

her brother.13      Following the proffer, the court stated: "Well, I

will not allow you to ask [about] that unless I first hear that

from [Rosa-Valentín]. . . .            Because I think this is too much of a

stretch.    If you give me . . . some foundation evidence that he has

done that, I will allow you to [recall Officer I]."

               When the interrogation resumed, Officer I admitted that

he had offered money to Rosa-Valentín in exchange for police

officers' names.         When asked about the timing of his proposal,

Officer    I    said   that    he    first     mentioned   it   to   Rosa-Valentín

indirectly during a chance encounter with her while on duty


13
    Apparently, the wife of Rosa-Valentín's brother committed
suicide in the middle of an extramarital affair with the man whom
Officer I allegedly said that he wanted to kill.

                                         -15-
patrolling his sector.   In this regard, Officer I testified that,

in responding to a late-night complaint about noise and loud music,

he arrived at a commercial establishment where a birthday party

appeared to be taking place.    The party turned out to be Rosa-

Valentín's.   As Officer I recounted: "[W]hen the person that came

out to explain why the music was so loud turned out to be her, I

greeted everybody and then I continued patrolling.   I explained to

her that they needed to lower the music down, and . . . they told

me that they were just about to close."    Officer I denied having

any beers or allowing the party to continue after 2:00 a.m. in

contravention of a municipal ordinance.   He also denied going to

Rosa-Valentín's house looking for her more than fifteen times after

the birthday party.

          As proffered, Delgado called Rosa-Valentín to the witness

stand as part of her case-in-chief.    The government immediately

objected, arguing that the testimony was irrelevant.   At sidebar,

defense counsel repeated the proffer previously given about Rosa-

Valentín's testimony, and the court stated that it would have "to

hear the evidence outside of the presence of the jury . . . to see

if it's relevant."

          Outside the presence of the jury, Rosa-Valentín stated

that Officer I was her brother's lifelong friend and that she had




                               -16-
known him for approximately thirty-three to thirty-four years.14

She also stated that, during the funeral services for her sister-

in-law, Officer I told her twice that he wanted to kill the man

involved in the extramarital affair that allegedly caused the

suicide.

           Rosa-Valentín further testified that Officer I "used to

tell [her] when he came home all the things that he used to do."

Specifically, she testified that Officer I mentioned to her that he

would go to a drug point in his patrolling sector, arrest a seller,

"and [he] would tell the guy to call his boss. . . .     [W]henever

they got in touch with the drug dealer, [he] would tell him that in

order to release his runner, he was going to have to give him

something in return, either weapons, drugs, or money."   Similarly,

Rosa-Valentín testified that Officer I told her of other instances

in which he would fabricate cases and arrest people to ask "for

either drugs, weapons, or money, and he told [her] that he would

always ask for weapons."

           Rosa-Valentín next gave her version of the interactions

she had with Officer I on the day of her birthday.     According to

her testimony, after greeting Officer I that night, he told her



14
   Rosa-Valentín worked as a restaurant waitress at the time of her
testimony. She was asked whether she had a romantic relationship
with Officer I. She answered: "No, never."      She was also asked
about the extent of her relationship with Delgado, and she said
that Delgado "was a friend of her brother" but that Delgado and she
did not "have a relationship as friends."

                               -17-
that "he was [on duty] in a [nearby] park so he could spend some

time with us at the [party]."     While at the party, she said that

Officer I had around eight or nine beers.   She stated that, at some

point, a police sergeant drove by the party, but that the party was

allowed to continue until 4:30 a.m. after Officer I spoke to the

sergeant.    Officer I left the party at around 1:30 or 2:00 a.m.,

but came back later.    After the establishment where the party was

being held had closed, Rosa-Valentín's guests (including Officer I)

went to her house and continued the gathering until 6:00 a.m.

Before the party was over, Officer I mentioned to Rosa-Valentín

that he would come back the next day because he needed to talk to

her.

            According to Rosa-Valentín's testimony, Officer I came to

her house the next day.   Her account of that visit was as follows:

            He came in [driving] the patrol car, like he
            always did, wearing his uniform. . . .     He
            asked me if I could get some police officers
            for him . . . . He asked me if I could get
            some for him to do some part-time work, and I
            told him I would check, because I have a
            friend who already had part-time jobs. They
            worked at gas stations, that kind of thing.
            Again, he emphasized whether I had the phone
            number, whether I had it in a safe place. I
            said I did. And he told me that if anything
            came up, that I should call him, that he was
            offering me $5,000 for every cop that I
            brought to him.

Rosa-Valentín also stated that Officer I persistently followed up

on his inquiry: "during the day he would come three, four, five,

six, seven times . . . then at night he would come in a patrol

                                 -18-
car." Officer I kept this routine up for four months, beginning in

February and ending in mid-June.

            Lastly, Rosa-Valentín testified that, when she refused to

provide any information to Officer I, he invited her to do part-

time work herself.     She said that, when she asked what the part-

time work would be, Officer I told her to go to an apartment in the

municipality of Guaynabo, "and [that] he would talk to [her] over

there."    Officer I also told her that she could go to the apartment

with her kids, that there was a pool and a tennis court in the

complex, and that they would have a good time there.

            After a brief examination by the government, the district

court found Rosa-Valentín's testimony inadmissible under Fed.        R.

Evid. 608(b).15      In so ruling, it rejected defense counsel's

argument    that   Rosa-Valentín's   testimony   directly   contradicted

portions of Officer I's testimony.       Counsel further argued that

Rosa-Valentín's testimony was relevant to Delgado's entrapment

defense.    But the court ruled the entire testimony to be "nothing

else but an attempt to circumvent Rule 608."




15
    The defendants argued that the evidence was admissible under
Rules 404 and 613. The government stated that Rule 404 was
inapplicable because Officer I was not a defendant, and the court
agreed. The court sua sponte found Rule 613 inapplicable without
explaining its reasoning.

                                 -19-
          2. Applicable Law and Analysis

          We review the district court's evidentiary findings for

abuse of discretion, United States v. Pelletier, 666 F.3d 1, 5 (1st

Cir. 2011), and reverse when, among other reasons, a decision rests

on an erroneous conclusion of law.       See, e.g., United States v.

Pires, 642 F.3d 1, 10 (1st Cir. 2011).    Where, as here, a defendant

challenges a conviction on account of an evidentiary error, the

verdict will not be overturned if "it is highly probable that the

error did not affect the verdict."     United States v. Pridgen, 518

F.3d 87, 91 (1st Cir. 2008).         Put differently, "even if [an

evidentiary] error occurred, it would not serve to overturn a

conviction if it ultimately proved harmless."         United States v.

Landrón-Class, 696 F.3d 62, 68 (1st Cir. 2012).          In this case,

Delgado has demonstrated error, and the government has not met its

burden of showing that the error was harmless.       See United States

v. Meises, 645 F.3d 5, 24 (1st Cir. 2011).

          Our   inquiry   revolves   around   Rule   608(b),   which   in

pertinent part prohibits the admission of extrinsic evidence "to

prove specific instances of a witness's conduct in order to attack

or support the witness's character for truthfulness."           Fed. R.

Evid. 608(b) (emphasis supplied).        The phrase "character for

truthfulness" was incorporated into the Rule by amendment in 2003.16


16
    In pertinent part, the prior rule read as follows: "Specific
instances of the conduct of a witness, for the purpose of attacking
or supporting the witness' credibility . . . may not be proved by

                                -20-
The   amendment   sought   to   conform      the    Rule's   language    to    the

drafters' original intent, which was to exclude extrinsic evidence

of a witness's general propensity for honesty and truth, rather

than particular instances of honesty or dishonesty used for other

non-propensity    purposes.     See    Fed.    R.    Evid.   608(b)     advisory

committee's note.

           Rule 608(b) was thus amended to do away with the mistaken

notion that its reach extended to extrinsic evidence offered for

general impeachment purposes, such as, for example, contradictions,

prior inconsistent statements, bias, or mental capacity.                      Id.

After the amendment, courts routinely find Rule 608(b) inapplicable

to general impeachment evidence.              See, e.g., United States v.

Taylor, 426 F. App'x 702, 706 (11th Cir. 2011) (per curiam)

(holding that Rule 608(b) did not bar testimony that contradicted

defendant's story); United States v. Skelton, 514 F.3d 433, 441-42

(5th Cir. 2008) (stating that Rule 608(b) is inapplicable in

determining the admissibility of evidence introduced to contradict

a witness's testimony as to a material issue); United States v.

Magallanez, 408 F.3d 672, 680-81 (10th Cir. 2005) (holding Rule

608(b) inapplicable because "the evidence was introduced not to

'attack' the witness's 'character'" but to demonstrate that a

statement made during direct examination was false).




extrinsic evidence."

                                      -21-
              We examine the excluded testimony against this backdrop.

As previously stated, Delgado avers that Rosa-Valentín's testimony

contradicted Officer I's in several respects, and it is clear from

the record that this was the case.               Officer I, among other things,

disavowed constantly visiting Rosa-Valentín after her birthday,

whereas in her proffer she stated that it was precisely thereafter

that    Officer    I   harassed     her    for    approximately        four   months,

insisting that he be provided with contact information of police

officers to do part-time work, sometimes going to her house more

than seven times per day.               Rule 608(b) does not preclude the

introduction of this type of impeachment evidence. See Taylor, 426

F. App'x at 706; Skelton, 514 F.3d at 441-42; Magallanez, 408 F.3d

at 680-81.

              More importantly, however, we agree with Delgado that

Rosa-Valentín's testimony would have shown how Officer I went about

his participation in Operation Guard Shack and would thus support

her entrapment defense.         See United States v. Rizvanovic, 572 F.3d

1152,   1155    n.1    (10th    Cir.    2009)    ("Rule     608(b)   does     not   bar

extrinsic evidence to the extent it goes to substantive issues, and

here    the    rebuttal     evidence       tended      to   disprove    Defendant's

affirmative       defense   .   .   .    .");    see    also   United    States      v.

Montelongo, 420 F.3d 1169, 1175 (10th Cir. 2005) (finding that Rule

608(b) does not preclude evidence negating a defendant's guilt).




                                          -22-
          It is black-letter law that an entrapment defense has two

elements: "'(1) government inducement of the accused to engage in

criminal conduct, and (2) the accused's lack of predisposition to

engage in such conduct.'"    United States v. Sánchez-Berríos, 424

F.3d 65, 76 (1st Cir. 2005) (quoting United States v. Rodriguez,

858 F.2d 809, 812 (1st Cir. 1988)).17      In connection with the

inducement prong, Rosa-Valentín and Delgado painted a similar

picture of Officer I's relentless pursuit of Operation Guard Shack

part-time workers.   Rosa-Valentín testified that Officer I offered

her large amounts of money and pursued her for four months --

sometimes going to her house more than seven times a day -- trying

to win her over so that she would provide contact information for

part-time employees. In Delgado's case, she testified that Officer

I courted her almost daily for approximately one month before she

capitulated.   See United States v. Groll, 992 F.2d 755, 759 (7th


17
    A prima facie showing of both elements is needed before a
district court may instruct the jury to consider the defense.
United States v. Dávila-Nieves, 670 F.3d 1, 9 (1st Cir. 2012). In
this case, the district court found that Delgado satisfied her
prima facie burden through her testimony, and thus instructed the
jury to consider her entrapment defense.
     Demarcating the contours of the entrapment defense, the
Supreme Court has noted that "'[a]rtifice and stratagem may be
employed to catch those engaged in criminal enterprises.'"
Jacobson v. United States, 503 U.S. 540, 548 (1992) (quoting
Sorrells v. United States, 287 U.S. 435, 441 (1932)). Nonetheless,
the Court has cautioned law enforcement officers and prosecutors
that "[i]n their zeal to enforce the law, however, Government
agents may not originate a criminal design, implant in an innocent
person's mind the disposition to commit a criminal act, and then
induce commission of the crime so that the Government may
prosecute." Id.

                                -23-
Cir. 1993) (finding that evidence of informant calling defendant on

a daily basis for over a month requesting marijuana and threatening

the defendant constituted a colorable entrapment defense).

          Delgado's    and     Rosa-Valentín's       testimonies        similarly

reflected that Officer I tried to lure them into Operation Guard

Shack activities by appealing to their long-lasting friendships.

See United States v. Wright, 921 F.2d 42, 45 (3d Cir. 1990)

(explaining that improper inducement by law enforcement may take

the form of pleas based on sympathy or friendship). But see United

States v. Ford, 918 F.2d 1343, 1348-49 (8th Cir. 1990) (finding

that friendship with a confidential informant is not evidence of

entrapment).      Delgado's    and   Rosa-Valentín's         testimonies     also

reflected that Officer I attempted to manipulate his way around

potential targets' reluctance to participate in an Operation Guard

Shack "part-time."     As to Rosa-Valentín, Officer I told her to

bring her children to the "part-time" because there was a pool and

a tennis court in the apartment where it would take place.

Concerning Delgado, she said that Officer I romantically seduced

her until she gave in to his invitations to engage in a "part-

time."

          Furthermore,    Rosa-Valentín's          testimony    supported       the

propensity prong of Delgado's entrapment defense.                    For example,

Rosa-Valentín's    testimony    showed      that   Officer     I's    pursuit    of

potential Operation Guard Shack targets was not limited to corrupt


                                     -24-
officers.      In    this      regard,     she    testified    that      Officer    I

persistently asked her for contact information of police officers,

even though she told him she knew only officers seemingly involved

in legitimate part-time work (her exact words on this were: "They

worked at gas stations, that kind of thing").                 Rosa-Valentín also

testified that Officer I invited her to participate in a "part-

time" herself, despite the fact that she had no criminal record,

links to the drug-trafficking trade, or involvement with the police

force.    Delgado testified similarly, stating that her untarnished

criminal record shows that she had no inclination to engage in

illegal activities before Officer I's month-long pursuit.                          See

Rodriguez, 858 F.2d at 815-16 (stating that the absence of a

criminal record or known links to criminal activity could show the

accused's lack of predisposition to engage in illegal conduct); see

also United States v. Gamache, 156 F.3d 1, 10-11 (1st Cir. 1998)

(same).

            Notwithstanding the above, the government argues that

"[t]he     court     correctly     found         [Rosa-Valentín's]        testimony

inadmissible under Rule 608(b), which only permits inquiry into

prior    conduct    if   the   conduct     is    probative    of   the    witness's

character for truthfulness or untruthfulness."                But this argument

fails for at least two reasons.

            First, the language just quoted from the government's

brief encompasses the entire extent of its argument before us on


                                         -25-
Rule 608(b).      We have stated many times that such a lackadaisical

effort   is    insufficient    to   carry   the   day.    United   States    v.

Dellosantos, 649 F.3d 109, 126 n.18 (1st Cir. 2011); see also

United States v. Zannino, 895 F.2d 1, 17 (1st Cir. 1990).

              Second,   Rosa-Valentín's     testimony    fell   out   of   Rule

608(b)'s reach, inasmuch as it supported Delgado's entrapment

defense.      See 28 Charles Alan Wright & Victor James Gold, Federal

Practice and Procedure § 6113, at 47 (2d ed. 2012) ("Rule 608 does

not grant discretion to admit or exclude evidence for any non-

character purpose.").       While it may be true that Rosa-Valentín's

testimony incidentally called into question Officer I's character

for truthfulness, without more, such an effect does not render the

testimony inadmissable.        United States v. Abel, 469 U.S. 45, 56

(1984) ("[T]here is no rule of evidence which provides that

testimony admissible for one purpose and inadmissible for another

purpose is thereby rendered inadmissible; quite the contrary is the

case.    It would be a strange rule of law which held that relevant,

competent evidence which tended to show bias on the part of a

witness was nonetheless inadmissible because it also tended to show

that the witness was a liar.").

              The government also argues that "the instances mentioned

by   Rosa-Valentín      were   improper     collateral     impeachment      and

inadmissible."      See United States v. Cruz-Rodríguez, 541 F.3d 19,

30 (1st Cir. 2008) ("'It is well established that a party may not


                                     -26-
present extrinsic evidence to impeach a witness by contradiction on

a collateral matter.'" (quoting United States v. Beauchamp, 986

F.2d 1, 3 (1st Cir. 1993))).     But the government's brief contains

no   explanation   whatsoever   as   to   why   or    how   Rosa-Valentín's

testimony constituted collateral evidence.            Its argument in this

regard was perfunctory at best.       In fact, it was limited to the

introductory remarks just quoted and a few parenthetical citations.

See Dellosantos, 649 F.3d at 126 n.18 (stating that perfunctory,

undeveloped arguments are deemed waived).            All the same, we have

already established that significant portions of Rosa-Valentín's

testimony showed how Officer I performed as an Operation Guard

Shack agent and thus provided support to Delgado's entrapment

defense.   Accordingly, Rosa-Valentín's testimony was anything but

collateral.   See Beauchamp, 986 F.2d at 4 (stating that the term

"collateral evidence" refers to a matter which in "itself is not

relevant in the litigation to establish a fact of consequence,

i.e., not relevant for a purpose other than mere contradiction of

the in-court testimony of the witness" (internal quotation marks

omitted)); see also United States v. Williamson, 202 F.3d 974, 979

(7th Cir. 2000) ("A matter is collateral if it could not have been

introduced into evidence for any purpose other than contradiction."

(internal quotation marks omitted)).

           Lastly, the government attacks the admissibility of Rosa-

Valentín's proffer under Fed. R. Evid. 404(b)(1).           Rule 404(b)(1)


                                 -27-
prohibits the admission of "[e]vidence of a crime, wrong, or other

act . . . to prove a person's character in order to show that on a

particular    occasion   the    person   acted   in   accordance   with   the

character."     According to the government, the Rule applies here

because "Delgado . . . wanted to [use Rosa-Valentín's testimony] to

show that because [Officer I] was bad in the past, he must have

been bad in this case."        In so arguing, the government appears to

refer to the confessions of corrupt acts Officer I allegedly made

to Rosa-Valentín. But our prior discussion shows that the scope of

Rosa-Valentín's proffer went far beyond those admissions.18

             To boot, we disagree with the view that Delgado's stated

purpose in seeking Rosa-Valentín's testimony masked an effort to

circumvent Rule 608(b).19       In so ruling, the district court abused

its discretion by relying on an incorrect interpretation of both

the relevant facts and the applicable law. Moreover, we agree with


18
    The government's brief fails to address Delgado's contention
that Rule 404(b)(1) has a so-called reverse evidence prong that
permits the admission of Rosa-Valentín's testimony.    Given our
conclusion here, we need not reach this issue. Nevertheless, we
note that, in the past, the government itself appears to have
sanctioned the reverse evidence argument Delgado advances. See
United States v. Stevens, 935 F.2d 1380, 1404 (3d Cir. 1991)
("[T]he government submits, the defense may introduce evidence
[under Rule 404(b)] that the government induced others to commit
crimes in order to show that the defendant was induced to commit
the charged offense.").
19
   We recognize that our discussion does not exhaust the myriad of
possibilities in which the Federal Rules of Evidence could affect
the admissibility of Rosa-Valentín's testimony at trial.       Our
analysis is limited, as it must be, to the arguments the parties
raise on appeal.

                                    -28-
Delgado's proposition that Rosa-Valentín's proffered testimony

would have corroborated pivotal elements of her entrapment defense.

Because the government does not, and cannot, challenge such a

proposition, we comfortably find that the government has not met

its   burden   of   showing   that   "it    is   highly   probable   that   the

[evidentiary] error did not affect the verdict."            See Pridgen, 518

F.3d at 91.     This finding mandates that Delgado's conviction be

overturned.

           Of course, nothing in this decision should be interpreted

as an intimation on our part as to the merits of Delgado's

entrapment defense.     All that we decide today is that the district

court erred when precluding Rosa-Valentín from testifying as part

of Delgado's defense. Delgado cannot properly be convicted without

having the opportunity to present to the jury admissible, material,

and favorable testimony bearing on her defense.

B. Rivera's Challenge to the Special Jury Verdict Instructions

           We now turn to the first of Rivera's several claims on

appeal.   Among other things, Rivera argues that the district court

failed to properly instruct the jury that in answering a post-

verdict "special" question regarding drug quantity, they needed to

be sure of the quantity beyond a reasonable doubt.             We agree.

           1. Background

           At sidebar, before the jury was sent to deliberate,

Delgado's counsel asked the court to inform the jury that "the


                                     -29-
amount and the type of drugs would be determined by the jury."                  The

court emphatically refused. It retorted: "No, no, no, no, no. Not

this case.    We know it's seven kilos.          I'm sorry. . . .     It's seven

kilos.      We counted them on the video.             There's nothing to be

determined."20      The initial jury instructions and verdict form thus

left   no   role    for   the    jury   with    respect   to   determining      drug

quantity.     In fact, at that juncture, the court made no reference

to quantity, explaining to the jury that the conspiracy count only

had two elements:

             For you to find a defendant guilty of
             conspiracy, you must be convinced that the
             Government has proven each of the following
             things beyond a reasonable doubt. First, that
             the agreement specified in the indictment and
             not some other agreement existed at least
             between two people to commit that crime. . . .
             Second, that each of the defendants willfully
             joined in that agreement.

No one objected, and the jury returned a guilty verdict on all

counts.

             The court then stated in open court that it would dismiss

the jury unless the parties had any other motions.                The government

took the opportunity to request "a special jury [verdict] on the

amount of narcotics involved in this case."                 The court initially

refused, reasoning that photos of record showed the duffle bag

containing    the    seven      packages   of   purported      cocaine.   But   the


20
   The video itself does not support the court's remarks. It shows
only the four "bricks" the purported buyer placed on top of the
coffee table.

                                        -30-
prosecution insisted that the quantity issue was for the jury to

determine beyond a reasonable doubt.   Delgado's counsel initially

resisted, stating that "[t]he verdict ha[d] been rendered."   But,

after a short colloquy with the government and the court, counsel

agreed that the question was proper.     The court acquiesced and

immediately addressed the jury: "Members of the jury, the court has

decided to ask you an additional question.   Let me prepare a short

question for you to answer.   You have to go back and answer only

this question. It's like another deliberation under the same terms

and conditions."21

          The court instructed the jury thereafter: "I want you to

determine, answer an additional question that's going to be typed

out, how much narcotics were involved in this case.   Two choices,

less than five kilograms of purported cocaine or more than five

kilograms of purported cocaine." There were no trial objections to

these jury instructions.

          After a nineteen-minute deliberation, the jury returned




21
    Before submitting the special verdict form to the jury, the
court asked the parties to comment on the following proposed jury
question: "how much narcotics were involved in this case, less than
five kilograms of purported cocaine[;] more than five kilograms of
purported cocaine." Rivera's counsel objected on the basis that
the record contained no evidence about the weight or amount of the
purported drugs. But the court discarded the objection and sternly
remarked: "Counsel, listen to me.      Listen to me.     That is a
sentencing issue, not to be discussed today."

                               -31-
a verdict of "more than five kilograms of purported cocaine."22

              2. Applicable Law and Analysis

                     a. Alleyne Error Regarding the Jury Instructions

              Generally, we review challenges to the propriety of jury

instructions de novo.      United States v. Whitney, 524 F.3d 134, 138

(1st Cir. 2008).        However, where, as here, a defendant fails to

properly preserve an objection at trial, we review the record under

the plain-error standard.        United States v. Medina-Martinez, 396

F.3d 1, 8 (1st Cir. 2005); see also United States v. Cotton, 535

U.S.   625,    631-34   (2002)   (applying   plain-error   review   to   an

unpreserved Apprendi error); United States v. Harakaly, 734 F.3d

88, 94 (1st Cir. 2013) ("This court reviews unpreserved Apprendi

errors for plain error and preserved Apprendi errors for harmless

error. Since Alleyne is an extension of the Apprendi doctrine, the

same standards should apply to Alleyne errors." (internal citation

omitted)).23


22
   Consistent with the district court's instruction, the form given
to the jury was titled, "Special Verdict," and included the
question "[h]ow much narcotics were involved in this case." Two
options were given: "less than 5 kilograms of purported cocaine,"
or "more than 5 kilograms of purported cocaine." The jury returned
the form with an "x" marked beside the latter option.
23
   Although an Apprendi issue -- namely, that drug quantity should
be determined by the jury and not the judge -- was raised at trial
by Delgado's counsel as well as by the government (prompting the
court to require the jury to answer the special verdict question),
Rivera concedes that he did not raise the instructional issue at
trial. Rivera did in fact object to the special verdict question,
but only on the basis of the lack of evidence as to the weight or
amount of the purported cocaine.     There was no trial objection

                                    -32-
              The plain-error standard requires an initial showing of

three elements: (1) that an error occurred; (2) that the error was

clear or obvious; and (3) that the error affected substantial

rights   or    the   outcome   of   the   case.   See   United   States   v.

Sánchez-Maldonado, 737 F.3d 826, 828 (1st Cir. 2013); United States

v. Rodriguez, 675 F.3d 48, 64 (1st Cir. 2012); Whitney, 524 F.3d at

140 (citing United States v. Olano, 507 U.S. 725, 732-34 (1993)).

Even if those requirements are satisfied, however, we have the

discretion to affirm the ruling if "'the error does not distort the

fairness or integrity of the lower court proceedings in some

extreme way.'" Rodriguez, 675 F.3d at 64 (quoting United States v.

Kinsella, 622 F.3d 75, 83 (1st Cir. 2010)).             "This multi-factor

analysis makes the road to success under the plain error standard

rather steep; hence, reversal constitutes a remedy that is granted

sparingly."      United States v. Gelin, 712 F.3d 612, 620 (1st Cir.

2013).   This appeal, however, falls within the realm of those

infrequent cases in which reversal is warranted.

              As stated above, Rivera premises his challenge on the

district court's failure to instruct the jury that the government

needed to prove drug quantity beyond a reasonable doubt. The

reasonable-doubt standard, stemming from the Fifth Amendment’s Due


regarding the burden of persuasion and the failure to instruct the
jury that drug quantity needed to be determined beyond a reasonable
doubt. Accordingly, Rivera concedes in his supplemental brief that
the plain-error standard applies to the Alleyne issue concerning
the jury instructions.

                                     -33-
Process Clause, is interwoven with the Sixth Amendment’s promise of

a jury verdict.       See Sullivan v. Louisiana, 508 U.S. 275, 278

(1993) ("It would not satisfy the Sixth Amendment to have a jury

determine that the defendant is probably guilty, and then leave it

up to the judge to determine . . . whether he is guilty beyond a

reasonable doubt.").      It is therefore well settled that, in a

criminal case, a vital part of a judge's responsibilities is to

provide the "reasonable doubt" charge to the jury.           See Dunn v.

Perrin, 570 F.2d 21, 25 (1st Cir. 1978) (citing In re Winship, 397

U.S. 358, 364 (1970)).        Indeed, where a trial judge fails to

instruct the jury that all the elements of the charged crime must

be proven beyond a reasonable doubt, a finding of reversible plain

error may be proper.    See United States v. Hellman, 560 F.2d 1235,

1236 (5th Cir. 1977); United States v. Howard, 506 F.2d 1131, 1133-

34 (2d Cir. 1974).

             Prior to the Supreme Court's decision in Apprendi v. New

Jersey, 530 U.S. 466 (2000), this court did not consider "drug

quantity" to be an element of the offense for purposes of the

penalties prescribed in 21 U.S.C. § 841(b)(1).         See, e.g., United

States v. Eirby, 262 F.3d 31, 36 (1st Cir. 2001).          Rather, "drug

quantity" was considered to be a "sentencing factor" that the

sentencing    judge   could   determine   by   a   preponderance   of   the

evidence. See id. (explaining that pre-Apprendi, the specific drug

quantities in § 841(b)(1)'s penalty scheme did not have to be


                                  -34-
charged in the indictment or found by the jury).

          In Apprendi, the Supreme Court held that "[o]ther than

the fact of a prior conviction, any fact that increases the penalty

for a crime beyond the prescribed statutory maximum must be

submitted to a jury, and proved beyond a reasonable doubt."     530

U.S. at 490.   Two years later, in Harris v. United States, 536 U.S.

545 (2002), the Supreme Court declined to extend the Apprendi rule

to facts that increase only the mandatory minimum sentence.     See

id. at 565-69. While this appeal was pending, however, the Supreme

Court expressly overruled Harris in Alleyne, holding that any fact

that increases the mandatory minimum is an element that must be

submitted to the jury and proved beyond a reasonable doubt.     See

Alleyne, 133 S. Ct. at 2155, 2162-63.24      Here, Alleyne applies

retroactively to Rivera's claims on appeal.        See Griffith v.

Kentucky, 479 U.S. 314, 328 (1987) ("[A] new rule for the conduct

of criminal prosecutions is to be applied retroactively to all

cases . . . pending on direct review or not yet final . . . .");

Pena, 2014 WL 448439, at *6 ("The Alleyne rule applies to cases

pending on direct appeal at the time it was decided."); United

States v. Doe, No. 12-2304, 2013 WL 6697824, at *12 (1st Cir. Dec.

20, 2013) ("As Alleyne was decided during the pendency of [the

defendant's] appeal, we apply it here."); Harakaly, 734 F.3d at 94


24
   We examine the development of the Supreme Court's jurisprudence
from Apprendi to Alleyne in more detail in United States v. Pena,
No. 12-2289, 2014 WL 448439, at *4-*6 (1st Cir. Feb. 5, 2014).

                                -35-
n.4 (same).

             On Counts One and Two, Rivera was convicted of conspiring

and attempting to possess cocaine with the intent to distribute it.

See 21 U.S.C. §§ 841(a)(1), 846.              Section 841 prohibits, among

other things, possession with intent to distribute a controlled

substance.    Id. § 841(a)(1).        In   § 841, subsection (b) prescribes

the penalties for violations of subsection (a). Id. § 841(a)-(b).

For possession with intent to distribute cocaine, paragraph §

841(b)(1)    sets    out   three     different    ranges   of    prison    terms,

depending on the quantity of cocaine involved. Id. § 841(b)(1)(A)-

(C).

             For an indeterminate quantity of cocaine, there is no

mandatory minimum term of imprisonment, and the maximum term is

twenty years.       Id. § 841(b)(1)(C).       If the violation involves 500

grams or more of a substance containing cocaine, the permissible

prison terms range from a minimum of five years to a maximum of

forty years.     Id. § 841(b)(1)(B).          If the violation of § 841(a)

involves five kilograms or more of a substance containing cocaine,

as charged in the indictment here, then the highest statutory range

of   sentences      applies:   the    mandatory    minimum      is   ten   years'

imprisonment, and the maximum term is life in prison.                      Id. §

841(b)(1)(A).

             Under Alleyne, then, the "drug quantity" question in this

case -- whether the offense involved at least five kilograms of a


                                       -36-
substance containing cocaine -- aggravated the statutory sentencing

range, and was thus an element of the aggravated crime that was

required to be determined by the jury beyond a reasonable doubt.

See   Alleyne,   133   S.   Ct.    at   2161   ("A   fact   that   increases   a

sentencing floor, thus, forms an essential ingredient of the

offense . . . .        [T]he core crime and the fact triggering the

mandatory minimum sentence together constitute a new, aggravated

crime, each element of which must be submitted to the jury.").

           In this case, the jury determined that more than five

kilograms of cocaine were involved, triggering the aggravated

sentencing range (ten years to life) under subparagraph (A).               See

21 U.S.C. § 841(b)(1)(A).          Based on this finding, the district

court sentenced Rivera to the mandatory minimum of ten years'

imprisonment.     See id.         Although the jury returned a special

verdict form indicating their finding that "more than 5 kilograms

of purported cocaine" were involved in the case, however, the trial

judge failed to instruct the jury that they were required to make

this special finding beyond a reasonable doubt.             Nor can we assume

that the jury likely made such an inference, given that they were

never instructed that "drug quantity" was an element of any of the

offenses of conviction.

           Nevertheless, the government argues that the special jury

verdict and its accompanying instructions cured the instructional

defect.   Specifically, the government posits that the initial jury


                                        -37-
instructions unequivocally established the government's duty to

prove each element of the underlying offense beyond a reasonable

doubt.   The government thus reasons that "the district court's

[post-verdict special] instruction that deliberation would be under

the same 'terms and conditions' also called on the jury to accord

drug quantity the same treatment as the other elements of the

offense, . . . which comported with Alleyne."       This argument is

flawed for at least two reasons.

           First, it presumes that the jurors understood that the

court posed the special question because "drug quantity" was an

element of the underlying crime.       Nothing in the record supports

that   presumption.   The   instructions   accompanying   the   special

question were tersely given, with the court only stating that the

jury would be asked to answer another question.     The court neither

explained why the special question was being asked nor how the

jury's answer would bear in the case.      Moreover, the special jury

verdict form was submitted to the jurors after they had: (1)

deliberated pursuant to the initial jury instruction; (2) rendered

a guilty verdict; and (3) been told by the court that they were

about to be dismissed. Having discharged their duties as initially

explained by the court, and without the benefit of any guidance as

to the reasons for or relevance of the new question being asked,

the jurors had no cause to understand the special verdict question

as involving another element of the offense.


                                -38-
             Indeed, given the timing and manner in which the question

was   presented,        the    jurors     understandably     may   have   failed   to

appreciate that the additional question represented something more

than an inconsequential afterthought standing in the way of heading

home.     With nothing to discredit the reasonable inference that the

jury placed little weight on the "special" question, we cannot find

that they were sufficiently put on notice of its critical import to

the case.      Cf. United States v. DeMasi, 40 F.3d 1306, 1317 (1st

Cir. 1994) (framing the dispositive inquiry in a challenge to a

district court's "beyond reasonable doubt" charge as "whether there

is    a   reasonable          likelihood     that   the    jury    understood      the

instructions to allow [a] conviction based on proof insufficient to

meet the [beyond-a-reasonable-doubt] standard" (internal quotation

marks omitted)).

             Second, the government's argument places undue weight on

the   phrase      "under      the    same   terms   and    conditions."     In     the

government's view, this phrase properly conveyed to the jury that

its post-verdict deliberation required a determination that the

government had proven drug quantity beyond a reasonable doubt. The

government, however, fails to articulate how such a broad phrase

conveyed such a specific message.

             To    be   sure,       the   initial   jury   instructions    properly

conveyed to the jury that it needed to find all the elements of the

underlying crime beyond a reasonable doubt.                 But, as stated above,


                                            -39-
and consistent with the Supreme Court precedent applicable at the

time of trial, no one told the jury that "drug quantity" was an

element of the crime.         Indeed, even the government's appellate

attorneys insist in their brief that "[d]rug quantity was not an

element of the offense here."            Yet the government argues, in the

same breath, that the jury would have necessarily understood that

the special verdict question was required to be determined beyond

a reasonable doubt, based on the interplay of two instructions: (1)

the initial instruction that the jury must find the defendants

guilty beyond a reasonable doubt for "any essential element of a

crime charged," and (2) the subsequent instruction that the special

verdict question was "like another deliberation under the same

terms and conditions."        To accept such an inconsistent argument

would strain credulity.

              Similarly, the district court judge -- after giving the

instructions at issue, and immediately after the jury left the

courtroom to consider the special verdict question -- stated to

counsel that: "I can understand the Apprendi concerns . . . but in

a case like this one . . . I don't think you need a special

verdict.      I'm doing it for the simple purpose of pleasing you, if

you will.      I don't think you need that at all."         If the district

judge himself -- consistent with the then-governing case law -- did

not believe that "drug quantity" was an element required to be

proved   to    the   jury   beyond   a    reasonable   doubt,   and   did   not


                                     -40-
explicitly instruct the jury otherwise, then we cannot presume that

the jury made this inferential leap on its own initiative.

            The initial jury instructions involved many different

"terms    and   conditions,"    spanning   twenty     pages     of    the   trial

transcript.     The government has failed to identify a single record

entry that would allow us to properly link the phrase "under the

same terms and conditions" back to the beyond-a-reasonable-doubt

standard explained to the jury in the initial instructions.                 Such

imprecise   language   was     insufficient   to    do    the   heavy   lifting

necessary to protect Rivera's Sixth Amendment right.

            The government relies on United States v. Avilés-Colón,

536 F.3d 1 (1st Cir. 2008), and United States v. Pérez-Ruiz, 353

F.3d 1 (1st Cir. 2003), for the proposition that a verdict form

need not explicitly state that the beyond-a-reasonable-doubt-

standard governs the verdict, if the jury instructions sufficiently

conveyed the same information. This reliance is misplaced. On the

contrary, both cases weigh heavily against the government.

            In Avilés-Colón, we rejected the proposition that a

verdict   form   needed   to    explicitly    state      that   the   beyond-a-

reasonable-doubt standard would govern the jury's deliberations,

when the jury instructions at issue were "suitably focused" and

properly "conveyed the need to make the finding with that level of

certainty." 536 F.3d at 27.           Unlike this case, however, the

instruction in Avilés-Colón adequately framed "drug quantity" as an


                                    -41-
essential element of the case and made the necessary linkage with

the   reasonable-doubt    standard.         The     relevant     portion   of    the

instruction speaks for itself:

           For you to find the defendant guilty of this
           crime, you must be convinced that the
           Government has proved each of the following
           beyond a reasonable doubt: . . . fourth, that
           the quantity of the substance was at least one
           kilogram or more of heroin, five kilograms or
           more of cocaine, and a detectable amount of
           marijuana.

Id. at 26 n.20.

           Pérez-Ruiz provides no better help for the government, as

it also makes plain that jury instructions must provide a clear

linkage between the beyond-a-reasonable-doubt standard and the

proof that must be marshaled in connection with the elements of the

crime.     See Pérez-Ruiz, 353 F.3d at 16, 19-20 (vacating the

appellant's sentence, in the context of an enhanced sentencing

range    for   a   particular     quantity     of       drugs,   when   the     jury

instructions failed to "forge the necessary link" between the "drug

types    and   quantities"      alleged   in      the     indictment    and     "the

requirement that these facts be proven beyond a reasonable doubt").

           The instructional error in this case, moreover, is not

mitigated by the fact that Rivera's ten-year sentence happened to

also fall within the statutory range (zero to twenty years of

imprisonment) for an indeterminate quantity of cocaine.                          See

Alleyne, 133 S. Ct. at 2162 (reasoning that when a fact "aggravates

the legally prescribed range of allowable sentences, it constitutes

                                     -42-
an element of a separate, aggravated offense that must be found by

the jury, regardless of what sentence the defendant might have

received if a different range had been applicable").    The Alleyne

Court emphasized that whether a defendant could have received the

same sentence without the aggravating fact "is no answer" and "is

beside the point."      See id. ("Indeed, if a judge were to find a

fact that increased the statutory maximum sentence, such a finding

would violate the Sixth Amendment, even if the defendant ultimately

received a sentence falling within the original sentencing range

(i.e., the range applicable without that aggravating fact).").

          Under these circumstances, reversal is warranted even on

plain-error review.25     Given Alleyne's clear holding that facts

which increase mandatory minimum sentences must be submitted to the

jury and found beyond a reasonable doubt, see id. at 2163, it was

an obvious error to fail to properly instruct the jury that they

were required to determine the special verdict question beyond a

reasonable doubt. And since the district court sentenced Rivera to

the enhanced mandatory minimum sentence of ten years -- based on an

aggravating fact (drug quantity) that was not found beyond a

reasonable doubt, and for which scant evidence was presented -- the


25
    See Rodriguez, 675 F.3d at 64. As we have previously noted,
"[i]t may seem strange to talk about plain error, given how Alleyne
came down after [the] defendants argued these consolidated appeals
to us."    United States v. Acosta-Colón, No. 10-1076, 2013 WL
6654386, at *15 n.12 (1st Cir. Dec. 18, 2013). Nonetheless, we
apply Alleyne's holding retroactively under the plain-error
standard. See id.

                                 -43-
error affected Rivera's substantial rights and the outcome of his

case.26

          Likewise, we cannot say that the error did not "'distort

the fairness or integrity of the lower court proceedings in some

extreme way.'"    See Rodriguez, 675 F.3d at 64 (quoting Kinsella,

622 F.3d at 83). The evidence on the "drug quantity" question here

was far from overwhelming and uncontroverted. See Cotton, 535 U.S.

at 631-33 (applying the fourth prong of the plain-error test, and

stating that where evidence of a statutory element -- such as drug

quantity -- is "'overwhelming'" and "'essentially uncontroverted,'"

there is "'no basis for concluding that the error seriously

affected the fairness, integrity or public reputation of judicial

proceedings'" (quoting Johnson v. United States, 520 U.S. 461, 470

(1997)) (internal quotation marks and alteration omitted)); cf.

Harakaly, 734 F.3d at 95-97 (holding that an Alleyne error was

harmless when "the evidence of the triggering drug quantity was

overwhelming");   Pérez-Ruiz,   353    F.3d   at   17-20   (vacating   the

appellant's sentence after concluding that the government failed to


26
   Indeed, at sentencing, the district court acknowledged that the
statutory minimum may be "high" and representative of "an imperfect
system," but stated that the court was nonetheless bound by the
minimum. The court remarked to Rivera's counsel that: "If you find
a case that says I can do away with the statutory minimum," or any
case saying that "I can do what I want other than the statutory
minimum, we'll deal with it.     But you know very well that the
statutory minimum is the statutory minimum. It's a fact." Later,
the court explicitly stated that it was sentencing Rivera "to the
statutory mandatory minimum on the drug count, which is 120
months."

                                -44-
show "overwhelming evidence" of drug quantity at trial and thus

failed to demonstrate that the Apprendi error was harmless).

          While the exhibits in this case include photographs of

seven "bricks" and a duffel bag, the video of the transaction shows

only the four "bricks" that the purported buyer placed on top of

the coffee table.    The video is not clear as to whether Rivera saw

or handled more than four "bricks." There was no discussion on the

video or in the preceding phone calls as to the quantity of drugs

to be transacted, and there was no testimony presented that Rivera

or Delgado were told the quantity of purported drugs involved. The

"bricks" involved in this case were fake drugs, and no evidence was

presented as to their actual weight.         For example, if the seven

bricks actually weighed 0.7 kilograms each, their total weight

would be 4.9 kilograms -- just shy of the five kilograms necessary

for conviction of the aggravated offense.              Therefore, as in

Pérez-Ruiz, this is not "a case in which the evidence tying the

defendant to the charged conspiracy involved drugs that were

indisputably in excess of the requisite amounts."        See Pérez-Ruiz,

353 F.3d at 19.

          Under     these   circumstances,   we   do   not   consider   the

evidence of the drug quantity involved to be "overwhelming" or

"essentially uncontroverted."       See Cotton, 535 U.S. at 633.

Compare Harakaly, 734 F.3d at 95-97 (finding the drug-quantity

evidence to be overwhelming when "[t]he delivery that the police


                                  -45-
intercepted, taken alone, was nearly four times the triggering

amount,"      and   when   the   defendant   himself   "acknowledged

responsibility for a quantity of drugs that far exceed[ed] the

triggering amount"), with Pérez-Ruiz, 353 F.3d at 17-20 (evidence

that the conspiracy involved at least five kilograms of cocaine was

not overwhelming when "actual drug quantities" were mentioned "only

three times during the trial" -- including testimony from one

witness that he supplied the drug ring with more than fifteen

kilograms of cocaine, and testimony from a DEA agent that he

estimated that the drug ring distributed "over 150 kilograms of

cocaine").

             In sum, the record supports Rivera's contention that the

district court plainly erred in failing to instruct the jury that

the drug quantity question required a finding beyond a reasonable

doubt.     In light of this instructional error, under Alleyne,

Rivera's sentence cannot stand.     See Alleyne, 133 S. Ct. at 2163-

64.

                    b. Remedy

             To the extent that Rivera claims entitlement to a new

trial altogether in light of this error, however, he is mistaken.

The district court's instructional error invalidates Rivera's

ten-year mandatory minimum sentence under the enhanced penalty set

out in § 841(b)(1)(A), but it does not call into question the




                                 -46-
validity of his underlying conspiracy and attempt convictions under

§§ 846 and 841(a).

              Neither conspiracy nor attempt includes "drug quantity"

as an element of the core offense.             Under § 846, any person who

either attempts or conspires to commit a drug offense shall be

subject to the same penalties as the target offense.                    21 U.S.C.

§ 846.    We have previously held that a conviction for criminal

attempt under § 846 requires proof of only two elements: "(1) an

intent to engage in criminal conduct and (2) conduct constituting

a 'substantial step' toward the commission of the substantive

offense that strongly corroborates the criminal intent."                   United

States v. Dworken, 855 F.2d 12, 17 (1st Cir. 1988) (emphasis

omitted); United States v. Rivera-Sola, 713 F.2d 866, 869 (1st Cir.

1983).

              To secure a conspiracy conviction under § 846, the

government must prove that: "(1) a conspiracy existed; (2) the

defendant had knowledge of the conspiracy; and (3) the defendant

knowingly and voluntarily participated in the conspiracy."                 United

States   v.    Maryea,   704    F.3d   55,    73   (1st   Cir.    2013)   (citing

Dellosantos, 649 F.3d at 116).           Accordingly, the government need

not   prove    a   particular   drug    quantity     in   order    to   secure   a

conviction for the core offenses of conspiracy or attempt to commit

a drug crime.      See, e.g., United States v. Daniels, 723 F.3d 562,

564, modified in part on reh'g, 729 F.3d 496 (5th Cir. 2013)


                                       -47-
("[D]rug quantity is not an essential element of a conspiracy

offense."); United States v. Yeje-Cabrera, 430 F.3d 1, 12-13 (1st

Cir. 2005) (rejecting the argument "that unless the jury has found

a specific quantity of drugs, a defendant cannot be guilty of

conspiracy"); United States v. Gómez-Rosario, 418 F.3d 90, 104 (1st

Cir. 2005) ("No specific drug quantity needs to be proven for a

jury to convict a defendant of conspiracy to possess with intent to

distribute.").

           Therefore, under Apprendi and Alleyne, drug quantity is

an element for purposes of the aggravated penalties under §§

841(b)(1)(A) and 841(b)(1)(B), but it is not an element necessary

for conviction of the core offenses under §§ 841(a) and 846.         See

Daniels, 723 F.3d at 573 ("[W]here a defendant may be subject to

enhanced statutory penalties because of drug quantity or type, the

requisite fourth 'element' under Apprendi is not a formal element

of the conspiracy offense."); United States v. González-Vélez, 466

F.3d 27, 35 (1st Cir. 2006) ("The quantity of drugs is not an

element of conspiracy under § 846, nor is it an element of the

underlying controlled substances offense under § 841(a)(2).");

United States v. Collins, 415 F.3d 304, 314 (4th Cir. 2005) ("Guilt

of the substantive offense defined in § 841(a) is not dependent

upon   a   determination   of   the   amount   or   type   of   narcotics

distributed."); United States v. Toliver, 351 F.3d 423, 430 (9th

Cir. 2003), abrogated on other grounds by Blakely v. Washington,


                                  -48-
542 U.S. 296 (2004) ("[D]rug quantity and type need only be treated

as 'functional equivalent[s]' of formal elements of an offense when

a particular drug type or quantity finding would expose a defendant

to   an   increased     maximum     statutory     sentence,     as   they   do   not

constitute formal elements of separate and distinct offenses under

section 841(b)(1).").

            In Alleyne itself, the defendant was charged, among other

things, with using or carrying a firearm in relation to a crime of

violence, under 18 U.S.C. § 924(c)(1)(A).              Alleyne, 133 S. Ct. at

2155.     That provision carries a default minimum of five years'

imprisonment.       18 U.S.C. § 924(c)(1)(A)(i).                However, it also

includes two enhanced penalties if additional aggravating facts are

found: a minimum of seven years of imprisonment "if the firearm is

brandished,"      and   a   minimum    of   ten   years   "if    the   firearm    is

discharged."      Id. § 924(c)(1)(A)(ii)-(iii).           The jury indicated on

the verdict form that Alleyne had used or carried the firearm, but

did not indicate that the gun was "brandished."                 Nonetheless, the

district court found by a preponderance of the evidence that

Alleyne had brandished the gun, and thus sentenced him to seven

years' imprisonment.          The Supreme Court held that the Sixth

Amendment requires that the sentencing enhancement for brandishing

the gun must be found by the jury beyond a reasonable doubt.

Alleyne,    133    S.   Ct.    at     2163-64.      Despite      the   fact      that

"brandishing" was an "element" not found by the jury beyond a


                                        -49-
reasonable doubt, however, the Court did not vacate Alleyne's

conviction.    Rather, it "remand[ed] the case for resentencing

consistent with the jury's verdict."         Id. at 2164.

          Thus, Alleyne in effect recognizes a distinction between

"core crimes" and "aggravated crimes."        See id. at 2161.    In order

to subject a defendant to the enhanced penalty of an aggravated

crime, the aggravating element must be submitted to the jury and

found beyond a reasonable doubt.       See id. at 2161-63.    Failure to

do so invalidates the conviction as to the aggravated crime, but

does not necessarily undermine the defendant's conviction for the

core crime.   See id. at 2161-64 (vacating the defendant's sentence

for the "aggravated crime" of brandishing a firearm -- when that

aggravating element was found by the judge rather than the jury --

and remanding for resentencing consistent with the jury's verdict

of guilty on the "core crime" of using or carrying a firearm); see

also United States v. McCloud, 730 F.3d 600, 604 (6th Cir. 2013)

("[T]he discussion in Alleyne to the effect that brandishing is an

element rather than a sentencing factor was for purposes of the

Court's Sixth Amendment analysis; it did not mean that Alleyne's

conviction had to be reversed.").

          Here,   as   in   Alleyne,   the   enhanced   penalty   for   the

aggravated offense is unavailable due to the absence of a beyond-a-

reasonable-doubt jury determination on the aggravating element;

however, the convictions on the core offenses remain sound.


                                  -50-
Accordingly, Rivera's valid attempt and conspiracy convictions,

without more, subject him to the default statutory range of

penalties under § 841(b)(1)(C), regardless of the drug quantity

involved.

            When faced with similar Apprendi and Alleyne claims,

circuit courts have likewise reasoned that a successful appellant

is not entitled to a new trial, but rather is only entitled to

resentencing under the default penalty provision, § 841(b)(1)(C).

See, e.g., Daniels, 723 F.3d at 572 (concluding, post-Alleyne, that

the government's failure to prove drug quantity under § 841(b) does

not undermine conspiracy convictions under §§ 846 and 841(a), but

rather "only affects the sentence"); United States v. Kelly, 519

F.3d 355, 363 (7th Cir. 2008) ("[T]he remedy for a failure of proof

that a defendant possessed a particular amount or type of cocaine

would not be to grant him a judgment of acquittal or a new trial,

but rather to remand for re-sentencing subject to the default

statutory maximum term of twenty years."); Gómez-Rosario, 418 F.3d

at 108-09 (affirming the defendant's conviction, but remanding for

resentencing when the district court had improperly considered at

sentencing facts not found by the jury, including the amount of

heroin involved); Collins, 415 F.3d at 314 ("Because the conviction

of conspiracy to violate § 841(a) is sound, remanding for a new

trial is not the appropriate remedy."); Pérez-Ruiz, 353 F.3d at 17

("Because the issue of drug type and quantity was not properly


                               -51-
submitted to the jury, the statutory maximum remained at 20 years."

(citing 21 U.S.C. § 841(b)(1)(C))); Toliver, 351 F.3d at 431

("[A]lthough the government failed to prove any of the specific

drug quantities or that cocaine base/crack was involved in the

conspiracy, the defendants were not entitled to a judgment of

acquittal; rather, the district court was restricted in the maximum

sentence it could impose."); cf. Pena, 2014 WL 448439, at *9

(collecting cases that found error under Apprendi and Alleyne and

remanded to the district court for resentencing).

          The determination that Rivera is not entitled to a

retrial does not end our inquiry into the proper remedy, however.

At a minimum, under Alleyne, Rivera is entitled to resentencing

under § 841(b)(1)(C)'s default sentencing range.             But Rivera's

interests are not the only interests implicated here.          In light of

the reversal for procedural error, the government also has an

interest in potentially retrying Rivera for the aggravated crime

charged in the indictment.    Cf. United States v. Tateo, 377 U.S.

463, 466 (1964) ("Corresponding to the right of an accused to be

given a fair trial is the societal interest in punishing one whose

guilt is clear after he has obtained such a trial.           It would be a

high price indeed for society to pay were every accused granted

immunity from punishment because of any defect sufficient to

constitute   reversible   error   in     the   proceedings    leading   to

conviction.").


                                  -52-
          Because the Alleyne error here was an instructional

error, the Double Jeopardy Clause does not prohibit retrial.     See

U.S. Const. amend. V.; Burks v. United States, 437 U.S. 1, 14-15

(1978) (noting that the Double Jeopardy Clause bars retrial for

reversals due to insufficient evidence, but not reversals for

procedural trial errors such as incorrect jury instructions);

United States v. Lanzotti, 90 F.3d 1217, 1220-24 (7th Cir. 1996)

(same); see also Tateo, 377 U.S. at 466 (explaining that where

procedural defects at trial constitute reversible error, "the

practice of retrial serves defendants' rights as well as society's

interest").    Accordingly, we believe the proper remedy is that

employed by the Fourth Circuit in Collins, which involved a failure

to submit the question of individualized drug quantity to the jury.

See Collins, 415 F.3d at 313-15.

          The jury in Collins found the defendant guilty of a § 846

conspiracy to distribute crack cocaine in violation of § 841(a).

Id. at 314.   The Collins district court, however, erred by failing

to properly instruct the jury regarding the determination of drug

quantity; this error affected the appropriate sentencing range

under § 841(b).   Id. at 312-15.    Since "[g]uilt of the substantive

offense defined in § 841(a) is not dependent upon a determination

of the amount or type of narcotics distributed," the Fourth Circuit

held that the defendant's conspiracy conviction remained valid.

Id. at 314.   On that basis, the defendant was not entitled to a


                                   -53-
retrial. Id. However, the Fourth Circuit further reasoned that it

would be inconsistent with the Sixth Amendment and Apprendi to

remand the case and permit the district court upon resentencing to

determine the quantity of cocaine for purposes of the penalties

outlined in § 841(b).      Id.

             For those reasons, the Fourth Circuit withheld judgment

on the conspiracy count, giving the government thirty days to

request that the court order one of two remedies: (1) affirm the

conspiracy conviction and remand for resentencing under the default

penalty provision set out in § 841(b)(1)(C), or (2) reverse the

conspiracy conviction and remand for a new trial. Id. at 315, 317.

In analogous contexts, our sister circuits have at times employed

the same remedy, giving the government the option to consent to

resentencing under a lesser sentencing range, in lieu of a remand

for a new trial.      See United States v. Garcia, 37 F.3d 1359, 1371

(9th Cir. 1994), receded from on other grounds by United States v.

Jackson, 167 F.3d 1280 (9th Cir. 1999); United States v. Orozco-

Prada, 732 F.2d 1076, 1084 (2d Cir. 1984); Brown v. United States,

299 F.2d 438, 440 (D.C. Cir. 1962).

             We therefore will withhold judgment as to the conspiracy

and   attempt    counts   for    thirty   days,   during    which    time   the

government      can   request    either   (1)   that   we   affirm   Rivera's

convictions and remand for resentencing under § 841(b)(1)(C) -- for

which there is no mandatory minimum term of imprisonment, and a


                                     -54-
statutory maximum of twenty years -- or (2) that we vacate Rivera's

convictions and remand for a new trial, allowing the question of

drug quantity to be properly submitted to a jury.

C. Rivera's Remaining Challenges

          Rivera also lodges a number of other challenges to his

conviction.   Because Rivera is not entitled to a new trial on the

basis of the Alleyne error discussed above, we must consider the

additional issues that he raises on appeal: (1) that the district

court abused its discretion in denying a trial continuance, thus

violating Rivera's right to a fair trial and effective assistance

of counsel; (2) that the denial of a continuance deprived Rivera of

effective assistance of counsel at voir dire, abrogating his right

to a fair and impartial jury; and (3) that a series of evidentiary

errors cumulatively undermined Delgado's right to a fair trial.

Each of these contentions are examined in turn.

          1. The Denial of a Trial Continuance

          Rivera   argues   that    the     district   court   abused   its

discretion in refusing to grant a brief continuance of the trial

date, and that this refusal violated his rights to a fair trial and

effective assistance of counsel.          Although we are persuaded that

several factors weighed strongly in favor of granting the requested

continuance, we find no prejudice and thus ultimately decline to

grant Rivera relief on this issue.




                                   -55-
                      a. Background

             The defendants were indicted on September 9, 2010.           The

district court appointed Attorney Ramon L. Garay-Medina as Rivera's

counsel on October 19, 2010. The court held two status conferences

with counsel in the case: the first conference was held on November

2,   2010,   during    which   the   court   scheduled   the   final   status

conference for November 16, 2010. At that final status conference,

the court scheduled the jury trial to begin three weeks later, on

December 7, 2010.      On Friday, December 3, 2010, the court advanced

the trial date by one day, rescheduling trial for 9:00 a.m. on

Monday, December 6, 2010.        On that same Friday before trial, the

government filed a motion in limine to preclude the defendants from

(1) alluding to an entrapment defense during opening statements,

without first making a proffer of "some hard evidence" supporting

both elements of the entrapment defense, and (2) making any

arguments aimed at jury nullification.           According to the record,

the district court neither set a deadline for a response from the

defense nor entertained oral argument on the government's motion,

which the court granted -- without explanation -- shortly before

trial on December 6, 2010.

             Early in the morning on the day of trial, Rivera's

counsel filed an "emergency motion" for a one-week continuance so

as "to allow completion of the investigation, and/or preparation

for trial."    In that motion, counsel complained that at the final


                                      -56-
status conference held November 16, 2010, the court scheduled trial

for   December    7,   2010,   despite   the   protestations   of   "[b]oth

attorneys" that "they needed more time to adequately prepare for

this trial."     Additionally, the motion described a number of other

criminal trials and cases for which Rivera's counsel was then

responsible.     The motion noted that on December 3, 2010 -- the

Friday preceding the Monday trial -- the government provided

significant impeachment evidence to the defendants, amounting to

"more than 600 pages of documentation (including sanitized reports

that affect the investigation in preparation for trial)."27 Counsel

asserted that he worked "in preparation for trial during the whole

weekend," but that he "ha[d] not been able to complete reviewing

the additional material provided."             Rivera suggested that the

government would not be prejudiced by a one-week delay, given that

the government "had years to investigate these cases, and prepare

them for trial."       The motion also sought a court order requiring



27
   Rivera's appellate brief clarified that this production included
689 pages of documents that were material to the defense (the
"Brady/Giglio materials"), which the government was required to
disclose to the defense pursuant to Brady v. Maryland, 373 U.S. 83
(1963) and Giglio v. United States, 405 U.S. 150 (1972). Rivera
notes that the disclosure included: (1) 509 pages of payment
records for Officers I and II; (2) eighteen pages of redacted FBI
reports "about an investigation into a stolen car and gun ring
among [Puerto Rico] undercover police, indicating that it found
[Officer II]'s version of the events less than reliable"; and (3)
a 162-page Puerto Rico police file of misconduct investigations
against Officer I. These investigations of Officer I included two
investigations from 2000, one from 2002, and a case filed in 2010
that arose from his role as an undercover agent in 2006.

                                    -57-
the government to provide Rivera with unredacted versions of the

reports disclosed on December 3, 2010.

          Immediately after the case was called for trial on

December 6, 2010, counsel for the defense asked to approach the

bench.   Rivera's counsel informed the court that he had filed a

motion to continue earlier that morning.    It is apparent from the

transcript that the district court had not read Rivera's motion and

had no knowledge of the government's Friday-afternoon disclosures.28

Rivera's counsel was given a brief opportunity to explain that

despite working all weekend, he and his client were not able to

complete discussions of the Brady/Giglio documents provided to the

defense by the government on Friday.     Counsel noted that "[f]or

example, there is information involving the confidential services,

that there are complaints before the Supreme Court of Puerto Rico

for fabricating cases against people." Without further discussion,

the court immediately replied:

          Well, let me say this: We are not going to
          cross that bridge before we get there.     If
          there is an issue, a real issue that surfaces
          in the middle of trial that requires me to
          deal with it and give you whatever remedy we



28
   The district court's responses indicated not only that it had
failed to read the motion and consider the arguments raised
therein, but also that it was not even aware that such a motion had
been filed. The court inquired, "What are the circumstances? When
was the motion filed?" The court repeated the question "[w]hat are
the circumstances?" two more times, and also asked "What materials
are we talking about? What is it you discovered? What is it that
you discovered late?"

                                 -58-
           need, we'll deal with it.   But a continuance
           is out of the question.

Given the perfunctory nature of the in-court discussion on this

issue, and without the benefit of having read Rivera's motion, the

district court denied the continuance without first learning the

scope, volume, or precise nature of the disclosed documents.

Shortly thereafter, the court addressed the potential jurors and

began the process of selecting a jury.

                  b. Applicable Law and Analysis

           Trial courts are granted broad discretion in scheduling

trials and ruling on motions for continuances.     United States v.

Maldonado, 708 F.3d 38, 42 (1st Cir. 2013).   While that discretion

is limited by a defendant's constitutional rights to testimony by

defense witnesses and effective assistance of counsel, United

States v. Orlando-Figueroa, 229 F.3d 33, 39-40 (1st Cir. 2000),

"'only an unreasoning and arbitrary insistence upon expeditiousness

in the face of a justifiable request for delay violates the right

to the assistance of counsel.'" Maldonado, 708 F.3d at 42 (quoting

Morris v. Slappy, 461 U.S. 1, 11-12 (1983)).        Accordingly, a

district court's denial of a motion to continue trial is reviewed

for abuse of discretion.   United States v. Rosario-Otero, 731 F.3d

14, 18 (1st Cir. 2013).    Under this standard, we will not disturb

such a decision if reasonable minds could disagree about the proper

ruling.   See Maldonado, 708 F.3d at 42.



                                -59-
             In evaluating a denial of a continuance, we consider

"'the reasons contemporaneously presented in support of the request

for the continuance.'" Rosario-Otero, 731 F.3d at 18 (quoting West

v. United States, 631 F.3d 563, 568 (1st Cir. 2011)).                 We may also

consider a number of other relevant factors, including: the amount

of    time   needed   for   preparation         compared   to   the   actual   time

available; how diligently the movant used the time available, and

whether the movant contributed to his or her perceived predicament;

the   complexity      of   the   case;    other    available    assistance;    the

probable utility of a continuance; the extent of any inconvenience

to others (including the court, witnesses, and the opposing party);

and the likelihood of injustice or unfair prejudice resulting from

the denial of a continuance.             Id.; West, 631 F.3d at 568 (citing

United States v. Saccoccia, 58 F.3d 754, 770 (1st Cir. 1995)).                  We

consider this final factor to be essential, overturning the denial

of a continuance only when the movant identifies specific, concrete

ways in which the denial resulted in "substantial prejudice" to his

or her defense.       See United States v. Pacheco, 727 F.3d 41, 45 (1st

Cir. 2013); Maldonado, 708 F.3d at 42; United States v. Espinal-

Almeida, 699 F.3d 588, 615 (1st Cir. 2012); United States v.

Rodriguez-Marrero, 390 F.3d 1, 22 (1st Cir. 2004); Saccoccia, 58

F.3d at 770.




                                         -60-
            Rivera complains that the abbreviated trial schedule left

his counsel only twelve work days to prepare for trial.29         At that

time, his trial counsel was responsible for eleven ongoing criminal

cases before the district court, ten of which were older than

Rivera's case, and six of which were pending trial.       Rivera argues

that the hurried trial schedule and the denial of his motion for a

one-week continuance violated his rights to a fair trial and

effective    assistance   of   counsel.   In   Rivera's   view,    three

developments occurred on December 3, 2010 (the Friday before trial)

that increased the prejudice of this denial: (1) the trial court

advanced the trial date by one day, from Tuesday, December 7 to

Monday, December 6; (2) the government filed a motion in limine

seeking to prohibit the defense from alluding to an entrapment

defense or a jury nullification argument; and (3) that afternoon,

the government delivered a nearly 700-page ream of partially-

redacted Brady/Giglio materials to the defense.30


29
   As previously noted, on November 16, 2010, the district court
held the second and final status conference in the case. At that
status conference, the court first set a date for trial: December
7, 2010 -- just three weeks later. Rivera argues that the court
imposed this date despite protestations from both defense counsel
that they needed more time to prepare for trial.       Due to the
Thanksgiving holiday, and the one-day advancement, the schedule
left Rivera only twelve business days to prepare.
30
   Such materials are required to be disclosed to the defense when
the government has in its possession evidence, including
impeachment evidence, that is material to either guilt or
punishment. See Giglio, 405 U.S. at 154; Brady, 373 U.S. at 87.
The materials disclosed by the government included significant
potential impeachment evidence concerning Officers I and II -- two

                                  -61-
             Rivera   argues   that   the    eleventh-hour   production   of

Brady/Giglio materials "promised a wealth of material with which to

impugn the credibility and motives of both of the [government's]

chief trial witnesses."        Due to the limited time available to

review these materials, Rivera maintains that trial counsel for the

defendants were not able to put the materials to good use.          Rivera

asserts that the defense thus failed to effectively establish,

among other things, that Officer I: (1) was paid over $47,000 in

benefits in excess of his police salary as compensation for his

"active pursuit" of new targets for Operation Guard Shack; (2) used

telephone calls and meetings to show his productivity to ensure the

renewal of his $1,400 in monthly payments from the FBI; and (3)

"convinced the FBI to give him a chance as an undercover agent

after getting into too much (162 pages['] worth) [of] hot water as

a local undercover officer."           The last-minute disclosure also

included impeachment evidence regarding Officer II, including prior

misconduct investigations into allegations that he had abused his

undercover position to engage in criminal activities like theft and

extortion.

             Noting that the district court made no findings and gave

no explanation for denying the continuance, Rivera argues that any

inconvenience to the court and the opposing party from a brief



of the government's star witnesses, not just in this case, but
presumably in multiple cases resulting from Operation Guard Shack.

                                      -62-
continuance would have been minimal, given that the government had

just three witnesses -- all of whom were government agents. Rivera

further maintains that the resulting prejudice was not limited to

trial counsel's inability to put the Brady/Giglio material to good

use, but rather that the denial resulted in systemic prejudice due

to trial counsel's ineffective assistance throughout the trial.31

Rivera concludes that as a result of the district court's "'myopic



31
   Throughout his brief, Rivera obliquely alludes to the allegedly
ineffective assistance of his trial counsel, particularly in those
sections challenging the denial of the continuance and the manner
in which voir dire was conducted.        However, Rivera does not
squarely present ineffective assistance of counsel as a separate
issue for our review on this direct appeal. Therefore, we need not
consider the issue independently here. See, e.g., United States v.
Williams, 630 F.3d 44, 50 (1st Cir. 2010).
     Moreover, we do not generally address ineffective assistance
claims on direct appeal, but instead require them to be raised on
collateral review. See United States v. Neto, 659 F.3d 194, 203
(1st Cir. 2011); United States v. Martinez-Vargas, 321 F.3d 245,
251 (1st Cir. 2003) ("The law is firmly settled in this circuit
that, as a general rule, fact-specific claims of ineffective
assistance of counsel, not raised below, cannot be aired for the
first time on direct appeal.").      We deviate from this general
practice and consider such claims on direct appeal "'only when such
scrutiny of the factual record is unnecessary because the
attorney's ineffectiveness is manifestly apparent from the
record.'"    Neto, 659 F.3d at 203 (quoting United States v.
Rivera–González, 626 F.3d 639, 644 (1st Cir. 2010)) (internal
quotation marks and alteration omitted).
     While the record before us seems to contain at least some
evidence suggesting a lack of diligence and a subpar performance on
the part of Rivera's trial counsel, an ineffective assistance claim
was not raised separately on direct appeal, and the record and
arguments have not been not sufficiently developed on the issue.
Therefore, we decline to find ineffective assistance of counsel at
this time, without prejudice to Rivera's right to assert that claim
in the district court through an application for collateral relief.
See 28 U.S.C. § 2255; see also Neto, 659 F.3d at 203;
Martinez-Vargas, 321 F.3d at 251.

                               -63-
insistence upon expeditiousness,'" his trial counsel was physically

present but unable to participate as an effective advocate.

(quoting Ungar v. Sarafite, 376 U.S. 575, 589 (1964)).

           For its part, the government responds that Rivera's

counsel   was   not   diligent    because   he    made   his   request    for   a

continuance on the first day of trial, inconveniencing the court,

the potential jurors, and the government.           The government reasons

that "36 hours was sufficient time to review [the Brady/Giglio

documents] in preparation for trial."            Noting that "[t]he defense

was aware of the trial date as early as November 16, 2010,

notwithstanding its single-day advancement," the government argues

that twenty days was sufficient time to prepare for a trial that

both sides agree was neither lengthy nor complex in terms of

witnesses and exhibits.        Further, the government maintains that

Rivera's assertions of his counsel's ineffectiveness due to the

denial of the continuance are "speculative and insufficient to show

prejudice," and constitute a thinly-veiled ineffective assistance

of counsel claim that should not be considered on direct appeal.

Finally, the government argues that the defense's decisions may

have been the result of a deliberate strategy, and the "more likely

reason" for Rivera's conviction was the "overwhelming evidence" of

his guilt, including the video.

           We   agree   with     Rivera   that   several   relevant      factors

militated strongly in favor of granting a continuance.              First, we


                                     -64-
find that the time needed for effective preparation exceeded the

time actually available.       While Rivera concedes that the case was

neither lengthy nor complex in terms of witnesses and exhibits, we

agree with him that the case involved difficult, time-intensive

questions with respect to the limits of any potentially applicable

entrapment    or    derivative      entrapment   defense,    and    the    means

available with which to present such a defense. From the time that

a trial date was first scheduled to the day trial began, the

defense was left with only twelve business days to prepare. Rivera

asserts -- and the government has not disputed -- that at the final

status conference, the district court ignored protestations from

both defense counsel that they needed more time to prepare for

trial.   To add insult to injury, without consulting the parties or

providing any explanation, on the Friday before trial the court

advanced the trial date by one day, to commence on Monday -- the

next business day.

             The final blow was delivered that same Friday afternoon

by the government, when it dumped nearly 700 pages of Brady/Giglio

materials    on    the   defense.      The   government     has    provided   no

explanation or excuse for making such a voluminous disclosure on

the eve of trial, without providing the defense even a single

business day to review the redacted, 689-page production.                 Nor do

we think a valid excuse exists here, given that: (1) Operation

Guard Shack began as early as July 2008; (2) some of the underlying


                                      -65-
impeachment documents, including FBI documents dated in the summer

of 2008, were in the government's possession since near the

beginning of the operation; and (3) the sham transaction for which

Rivera and Delgado were prosecuted, and which involved Officers I

and II, took place on July 24, 2009 -- one year and four months

before trial. Under these circumstances, and in the absence of any

explanation from the government, we fail to see how the eleventh-

hour provision of the Brady/Giglio disclosures here could reflect

anything other than ineptitude or strategic gamesmanship. For that

reason, the government's argument that "36 hours was sufficient

time to review [the documents] in preparation for trial" rings

particularly hollow.

            The   evidence   before    us    is   mixed   on   how   diligently

Rivera's trial counsel used the twenty days (twelve of which were

business days) available to prepare for trial.                  Though Rivera

asserts that at the final status conference he requested more time

to prepare for trial, he waited until 3:22 a.m. on the date of

trial to file a written motion for continuance, thus contributing

to his own predicament. However, this factor is mitigated at least

in part by the developments of Friday, December 3, including the

last-minute advancement of the trial date and the government's

extensive    Brady/Giglio      disclosures        that    afternoon,      which

significantly changed the landscape on the eve of trial.                   The

assertions by Rivera's trial counsel -- that despite having worked


                                      -66-
all weekend, he was unable to fully review the Brady/Giglio

materials and effectively prepare for trial -- weigh in favor of

the probable utility of a one-week continuance to finish trial

preparations in light of these new disclosures.

             While a one-week continuance would have resulted in some

minor inconvenience, that inconvenience is attenuated by several

facts.     First, as noted by Rivera, the government had only three

witnesses, all of whom were government agents.            Moreover, the

government      itself,   through     its   last-minute    Brady/Giglio

disclosures, was responsible for one of the significant reasons for

a continuance.     The inconvenience to the court was diminished by

the fact that the court had another trial scheduled for the same

day.      Earlier that morning, the court dismissed the jury in the

other case, postponing that trial until the conclusion of Rivera's

case.32    Given also that (1) this was a relatively short, three-day

trial; (2) the district court originally set a brief, accelerated

trial schedule; and (3) no prior continuances were granted in the

case, the extent of any inconvenience stemming from a one-week

continuance would have been minimal.        In sum, we find that the



32
   Immediately after the bench conference in which the court denied
Rivera's motion for a continuance, the court addressed the
Delgado/Rivera jury: "Members of the jury, I'm sorry that I had you
waiting.   I had to -- I had to select a jury for another case
earlier today, this morning. . . . And I did that, and I sent
those people away to start that trial after we conclude this one.
So now we are going to select a jury for this one and start it
right away."

                                    -67-
balance of the foregoing factors weighed overwhelmingly in favor of

granting the continuance.

          Considering also that the district court did not review

Rivera's written motion, did not review the Brady/Giglio materials

disclosed, did not inquire regarding the quantity or specific

nature of the production, did not ask the government the reason for

the extreme tardiness of the disclosure, did not weigh the relevant

factors on the record, and did not entertain more than a cursory

argument on the issue, it would seem that the district court's

denial constituted "'an unreasoning and arbitrary insistence upon

expeditiousness in the face of a justifiable request for delay.'"

See Maldonado, 708 F.3d at 42 (quoting Morris, 461 U.S. at 11-12).

          Nonetheless, we must consider one final factor: whether

Rivera suffered prejudice as a result of the denial.           See, e.g.,

Maldonado, 708 F.3d at 42; Espinal-Almeida, 699 F.3d at 615-16;

Saccoccia, 58 F.3d at 770. "When Brady or Giglio material surfaces

belatedly, 'the critical inquiry is not why disclosure was delayed

but whether the tardiness prevented defense counsel from employing

the material to good effect.'"     Pérez-Ruiz, 353 F.3d at 8 (quoting

United States v. Devin, 918 F.2d 280, 290 (1st Cir. 1990)).              To

demonstrate   prejudice   and   overturn   a   verdict   in   the   delayed

disclosure context, an appellant must show both: (1) some specific

prejudice beyond a mere assertion; and (2) that "there is a

reasonable probability that, had the evidence been disclosed to the


                                  -68-
defense in a timeous manner or had the trial court given the

defense more time to digest it, the result of the proceeding would

have been different."   Id. at 8-9.

          Here, while we do not doubt that the defense would have

been better prepared to impeach the government's witnesses if there

had been more time to digest the Brady/Giglio materials, Rivera has

failed to show a reasonable probability that the outcome of his

case would have been any different if the trial court had granted

the one-week continuance. See id. Rivera cites several facts from

the Brady/Giglio disclosures -- including the undercover officers'

compensation for the operation, and investigations into prior

misconduct by Officers I and II -- that would have allowed Rivera

to further "impugn the credibility and motives of both of the chief

witnesses." However, Delgado's counsel was in fact able to impeach

Officer I's credibility by asking him, among other things, about

his FBI compensation for participating in Operation Guard Shack; in

response, Officer I testified that he received approximately $1,400

per month. During cross-examination of the Special Agent, Rivera's

trial counsel was able to ask about the alleged misconduct of both

Officers I and II prior to their involvement with Operation Guard

Shack. Therefore, the defense did in fact use the information from

the disclosures to impeach the testimony of Officers I and II.

Accordingly, in essence Rivera's claim is that -- were he given

more time to review the materials -- he would have undertaken the


                               -69-
same trial strategy but would have done a somewhat better job of

attacking the government witnesses' credibility.

            Rivera has failed to explain how, if the Brady/Giglio

materials had been disclosed earlier or if the continuance had been

granted, he would have employed a different, more effective trial

strategy.    See, e.g., United States v. Lemmerer, 277 F.3d 579, 588

(1st Cir. 2002) (stating that an appellant cannot rely on "'wholly

conclusory assertions'" but must make at least "'a prima facie

showing     of   a   plausible   strategic   option   which   the   delay

foreclosed'" (quoting Devin, 918 F.2d at 290)); United States v.

Josleyn, 99 F.3d 1182, 1196 (1st Cir. 1996) ("[A] principal concern

in delayed disclosure cases [is] whether the failure to supply the

information in a seasonable fashion caused the defense to change

its trial strategy." (emphasis added)).

            And even if all the Brady/Giglio information had been

more effectively presented to the jury, there is not a reasonable

probability that the jury would have found that the government

failed to satisfy the elements of the offenses of conviction beyond

a reasonable doubt. Rivera does not even allege that he could have

used the Brady/Giglio material to prevent the government from

meeting its burden of proof on any element of an offense of

conviction.      Moreover, he does not challenge the district court's

ruling that the entrapment defense applied only to Delgado.          Nor

does Rivera argue before us now that the Brady/Giglio material


                                   -70-
provided a factual basis for a valid derivative entrapment defense,

or indeed, any other defense.33        The information contained in the

disclosure    fails   to   vitiate   the    video   evidence   of   Rivera's

participation in the sham transaction, which was corroborated by

his codefendant's admissions at trial as well as the incriminating

testimony provided by all three witnesses for the government.

             Given that Rivera does not specifically articulate how

the Brady/Giglio material at issue would have allowed him to either

(1) effectively challenge the government's burden of proof on any

element of an offense of conviction, (2) establish a foundation for

a viable defense, or (3) employ a different, more effective trial

strategy, he has failed to show a reasonable probability that the

trial's outcome would have been any different if the court had

granted his motion for a continuance.        See Pérez-Ruiz, 353 F.3d at

8-9.   Therefore, Rivera has failed to demonstrate specific and

substantial prejudice, and -- although we are indeed troubled by

what appears to be the district court's blind allegiance to speed

over careful consideration of Rivera's justifiable request for a

brief continuance -- his claim on this issue must ultimately fail.

See Maldonado, 708 F.3d at 42-44; Pérez-Ruiz, 353 F.3d at 8-9.




33
   As this issue was not raised on appeal, we express no opinion
here as to whether an entrapment or derivative entrapment defense
was available to Rivera. See Williams, 630 F.3d at 50 (stating
that underdeveloped arguments are deemed waived on appeal).

                                     -71-
              2. Voir Dire

              Rivera further argues that the court's voir dire was

inadequate to protect his right to a fair and impartial jury and to

intelligently exercise his peremptory challenges.                For the reasons

described below, we find no merit to this claim.

              Rivera   explicitly      concedes     that   the   court    did    not

improperly refuse to ask specific questions of the jurors and did

not generally employ improper procedures during voir dire. Rather,

he   argues    that    the   court's   "race   to    trial   left   his   counsel

apparently     incapable     of   participating      in    any   way,   either   by

suggesting issues to the Court or requesting follow up questions

about issues likely to create significant prejudice [to] his right

to a fair trial."       In support of this argument, Rivera notes that

his trial counsel proposed no questions, and in fact, "did nothing"

during the voir dire process.

              Rivera further argues that there were four substantive

issues that did not receive adequate attention at voir dire: (1)

the trial court should have asked more specific questions about the

jurors' knowledge of Operation Guard Shack, instead of asking just

one question concerning whether they knew about "the facts of the

case"; (2) although the court asked whether any juror worked (or

had a family member who worked) for a law-enforcement agency, the

court should have "inquired [] further" into the issue; (3) the

court should have asked the jurors regarding the fact that the


                                       -72-
video of the sham transaction included references to the San Juan

mayor as a "cokehead," which could have prejudiced jurors who

supported the mayor against the defendants; and (4) the court

should have explored the jurors' attitudes regarding homosexuality,

given that the government later presented evidence and argument

suggesting that Rivera was romantically interested in a male

undercover officer.

           Trial courts have "'broad discretion'" -- "'subject only

to the essential demands of fairness'" -- in determining how to

conduct voir dire.    United States v. Misla-Aldarondo, 478 F.3d 52,

60 (1st Cir. 2007) (quoting Real v. Hogan, 828 F.2d 58, 62 (1st

Cir. 1987)).    The Supreme Court has "repeatedly emphasized" that

jury selection "is 'particularly within the province of the trial

judge.'"   Skilling v. United States, 130 S. Ct. 2896,           2917 (2010)

(quoting   Ristaino   v.   Ross,   424    U.S.   589,   594–95    (1976)).

Accordingly, "[n]o hard-and-fast formula dictates the necessary

depth or breadth of voir dire," id., and we review the trial

judge's voir dire questioning for abuse of discretion, United

States v. Sherman, 551 F.3d 45, 49 (1st Cir. 2008) (citing United

States v. Bergodere, 40 F.3d 512, 517 (1st Cir. 1994)).            We grant

"'special deference'" to the district court's determination of jury

impartiality.   Id. at 51 (quoting United States v. Moreno Morales,

815 F.2d 725, 733 (1st Cir. 1987)).




                                   -73-
            We find no such abuse of discretion here.                    First, as

previously noted, the trial court did not refuse to ask any

questions requested by Rivera's counsel.                  Counsel requested no

questions, and even if he had, the court was entitled to "cover[]

the substance of the appropriate areas of concern by framing its

own questions in its own words."               Real, 828 F.2d at 62 (finding

that   a   trial   court   need   not    "pose    every    voir   dire    question

requested by a litigant"). The record shows -- and Rivera does not

dispute -- that the court asked a series of questions to identify

potential biases and inquired as to whether prospective jurors

could be fair and impartial in deciding the case. See Sherman, 551

F.3d at 52.    Thus, we find no abuse of discretion in the general

manner in which the district court chose to conduct voir dire.

            We further find no merit to Rivera's four specific

allegations of deficiencies in the voir dire process. With respect

to the first two alleged deficiencies, Rivera admits that the

district court asked about each issue.              While the court did not

refer to Operation Guard Shack during voir dire, it did review the

facts alleged in the indictment with the prospective jurors, and

added that the two defendants "were police officers from Puerto

Rico at the time the facts of this case allegedly occurred."                   The

court then asked if any of the potential jurors "have heard of

something that may be related to the facts of this case."                   No one

responded in the affirmative.


                                        -74-
          The court also asked if any prospective jurors were law-

enforcement   officers,   or    had    "close   relatives   who    are   law-

enforcement officers, police officers."           None of the prospective

jurors   indicated   that      they     were    law-enforcement     officers

themselves; several told the court that they had family members who

worked in law enforcement, but that this relationship would not

affect their ability to be fair and impartial.              Given that the

trial court inquired into both these issues, and in the absence of

a specific showing of prejudice or more developed argumentation, we

do not find that the district court abused its discretion in the

breadth and depth of its questioning.

          With respect to Rivera's final two specific allegations

of error, regarding disparaging comments concerning the mayor of

San Juan and statements implicating Rivera's sexuality, Rivera

concedes that the district court had no reason to know that either

of these facts might become an issue in the trial.                Hence, the

court could not have exceeded its "broad discretion" when it failed

to ask prospective jurors about specific facts unknown to the

court, unraised by the parties, and not yet at issue.                    See

Misla-Aldarondo, 478 F.3d at 60.         On this record, Rivera has not

shown that the district court abused its discretion in conducting

voir dire and selecting a jury.




                                      -75-
          3. Alleged Evidentiary Errors

          Finally, Rivera alleges five evidentiary errors, which

he argues cumulatively undermined his right to a fair trial.   We

begin by examining each individual alleged error in turn.

                 a. Testimony on Suspicion of Prior Corrupt Acts

          The first alleged evidentiary error identified by Rivera

concerns the testimony of the government's first witness, the FBI

Special Agent who helped set up the reverse sting.     The Special

Agent testified that he was responsible for preparing the "bricks,"

the undercover apartment, and the video equipment to record the

sham transaction.   Though he did not object at trial, Rivera now

complains that the Special Agent was permitted to testify that,

before approaching a target for a reverse sting, undercover agents

must have had a "reasonable suspicion" that the target was "corrupt

or involved in illegal activities or believed to be involved in

illegal activities."   Rivera asserts that such testimony was not

relevant and was overwhelmingly prejudicial.    He argues that the

testimony served only to suggest to the jury -- without any

supporting evidence -- that Rivera had committed some crime or

similar bad act before becoming involved in the reverse sting.

          Because Rivera failed to object at trial, we review the

trial court's admission of the testimony for plain error.        See

United States v. Powers, 702 F.3d 1, 10 (1st Cir. 2012).         The

plain-error test is an "exacting standard."    See Long v. Fairbank


                               -76-
Reconstruction Corp., 701 F.3d 1, 5 (1st Cir. 2012) ("To establish

plain error, a party must show that there was error, that it was

plain, and that it affected the party's substantial rights; an

appellate court may then notice the error only if it 'seriously

affect[ed]    the   fairness,   integrity,     or    public   reputation     of

judicial proceedings.'" (quoting United States v. Borrero–Acevedo,

533 F.3d 11, 15 (1st Cir. 2008))).

             Rivera's   argument   misses    the    mark.     The    government

presented no evidence that the FBI targeted Rivera, or that any

government     agents   approached     him   to     recruit    him    for   the

transaction.    Rivera was approached by his partner Delgado, who in

turn was approached by Officer I.       Thus, the allegedly prejudicial

effects of which Rivera complains concerned whether the undercover

agents had a reasonable suspicion of Delgado, not Rivera. Contrary

to Rivera's argument, the Special Agent's testimony did not suggest

that Rivera himself had previously committed some crime or similar

bad act. While Rivera and Delgado were charged with conspiracy and

aiding and abetting each other, Rivera fails to explain how the

implication that the government agents may have had a reasonable

suspicion of Delgado affected Rivera's substantial rights.

             Given that the two codefendants were tried together, we

do not think it improbable that an evidentiary error pertaining to

one defendant could impact the rights of the other, or that a

suggestion of corruption or criminality on the part of Delgado


                                     -77-
could implicate Rivera by association.                 However, Rivera fails to

connect the dots of such a theory, or explain how this alleged

error meets the standard for plain-error review.                   Even assuming

that    it   was   error    to    admit    the   testimony,    Rivera     has   not

demonstrated       that    such    an    error   was    "plain,"   affected     his

"substantial       rights,"      and    "seriously     affected"   the   fairness,

integrity, or public reputation of the trial.                See Long, 701 F.3d

at 5.    Thus, his cursory argument has fallen short of the "rather

steep" road to success under the "exacting" plain-error standard.

See Gelin, 712 F.3d at 620; Long, 703 F.3d at 5.

             Rivera further alleges that the Special Agent's testimony

regarding reasonable suspicion of corruption or illegal activities

violated Federal Rules of Evidence 403, 404(b), 405, 602, 701, and

802.    Apart from reciting these conclusory allegations, however,

Rivera fails to specifically explain how the Special Agent's

testimony violated these evidentiary rules.                We need not consider

such bare assertions on appeal.             See Zannino, 895 F.2d at 17 ("It

is not enough merely to mention a possible argument in the most

skeletal way, leaving the court to do counsel's work, create the

ossature for the argument, and put flesh on its bones.").

                      b. Sexual Orientation Evidence

             Secondly, Rivera argues that the introduction of evidence

of the defendants' respective sexual orientations violated Federal

Rules of Evidence 402 and 403 and violated his right to a fair


                                          -78-
trial.   Rivera challenges the admission of two categories of such

evidence: (1) evidence of Delgado's sexual orientation, and (2)

evidence of Rivera's sexual orientation. Where there was a proper

objection at trial, we review the district court's evidentiary

ruling for abuse of discretion; where no such objection was made,

we review for plain error.        See Powers, 702 F.3d at 10.

                          i. Delgado's Sexual Orientation

            We begin with the introduction of evidence regarding

Delgado's    sexual    orientation.      Because       the    defense   properly

objected to this evidence at trial, we review the admission of this

testimony for abuse of discretion.           See id.

            During the government's redirect examination of its first

witness (the Special Agent referred to above), the government

inquired    as   to   whether   the   Special   Agent        knew   "what   Raquel

Delgado's civil status is."           Delgado's counsel objected to the

questioning as irrelevant and outside the scope of Delgado's cross-

examination.      Seeking to inquire further as to the reasons for

Delgado's    divorce,    the    government    proffered       that   "the    agent

interviewed Ms. Delgado's ex-husband, and he told him that they got

divorced because she was having an affair with a female Sergeant."

The court sustained the objection, explaining that "in the context

of what we have in the case right now, it is extremely prejudicial,

beyond the facts of the case."




                                      -79-
           Later in the trial, as previously described, Delgado

testified that she had romantic affairs with Officer I, first in

2005, and then during the summer of 2009 when she was rejecting his

persistent invitations of part-time employment.              Delgado testified

that in 2005, she and Officer I "had a sporadic relationship"

during which they went on dates, visited each other's homes, and

"slept together several times."           She further testified that weeks

after the sham transaction, she and Officer I again had sexual

intercourse.     An important component of Delgado's defense, theory

of the case, and trial strategy was that Officer I improperly

induced her to participate in the sham transaction by appealing to

their long-lasting friendship and romantic relationship.

           Delgado's ex-husband also testified for the defense,

stating   --   among   other    things    --   that    he   and   Delgado   "were

boyfriend and girlfriend for almost three years, and we were

legally married for five years."          He testified that he and Delgado

had   children    together,     but   eventually       divorced    and   stopped

communicating     regularly      except      through    their     children.

           During its cross-examination of Delgado's ex-husband, the

government asked: "In fact, didn't you tell the FBI if they wanted

to know any details about Raquel Delgado's wife -- or rather life,

you would have to ask her girlfriend, San Juan Municipal female

Sergeant Wanda Rivera?"        Delgado's counsel objected, and the court

responded: "Overruled.     Isn't that what you told the agents? . . .


                                      -80-
You have to answer the question, sir.    That's not an answer.   You

have to answer the question."    In response, Delgado's ex-husband

answered: "What I said was that if he wanted -- if they wanted to

know about Mrs. Delgado, they should ask her friends, and Mrs.

Wanda Rivera, who would have direct information."

           The government immediately pressed the point further:

"Wait a minute.     You didn't tell the FBI that when you divorced

Raquel Delgado, she was having an affair with Sergeant [Rivera]."

At this point, the court overruled another objection from Delgado's

counsel, who then requested a sidebar.     The court explained its

reasoning to Delgado's counsel as follows:

           [N]ow it's relevant, because you are -- you
           are intimating in your evidence . . . that
           there is a man-woman relationship between the
           witness and your client. And I think the jury
           should consider whether there was a lesbian
           relationship between this woman and somebody
           else,   because   one   thing  is   kind   of
           inconsistent with the other.
                  Usually lesbians or gay people don't
           cross lines to the opposite sex. Don't you
           think?

Counsel disagreed, and the court responded, "Well, that's what I

understand. . . .   That's what I've learned and seen in my 67 years

of age."

           Delgado's counsel argued that the government was trying

to elicit statements regarding Delgado's sexual orientation in

order to divert the jury's attention from facts relevant to the

defense of entrapment -- whether she had a predisposition to commit


                                -81-
a crime or if she was improperly induced -- to a matter (her sexual

orientation) that had no bearing on the case.       Counsel continued:

"She could have a perfect relationship with this man.         She had it

for 16 years.     And she also had a relationship with a woman.     And

that doesn't make her a criminal. . . .            It doesn't make it

impossible to concede she had another male relationship."            The

court replied, "[b]ut it is kind of inconsistent."       When Delgado's

counsel   began    to   argue   that   the   evidence   was   "extremely

prejudicial" under Rule 403, the court concluded: "well if you're

asking under 403, the balancing is that it's relevant. Overruled."

With that, the bench conference concluded, and the government

continued asking the witness about Delgado's same-sex relationship.

          The inadequacy of the district court's faulty reasoning

and Rule 403 "balancing" on this issue should be immediately

obvious from the excerpts of the trial transcript referenced above.

Nonetheless, we will spell out a few of the concerns here.           The

competing arguments were effectively presented by Delgado's counsel

(in favor of exclusion) and the district court (in favor of

admission).     To the extent that the disputed testimony had any

relevance to a fact of consequence in determining the case, such

putative relevance was predicated on the idea that Delgado's one

alleged homosexual relationship made it somewhat less probable that

she also engaged in a heterosexual romantic relationship with

Officer I, which in turn had some bearing on her entrapment


                                  -82-
defense.    See Fed. R. Evid. 401 ("Evidence is relevant if: (a) it

has any tendency to make a fact more or less probable than it would

be without the evidence; and (b) the fact is of consequence in

determining the action.").

             Whatever limited probative value this evidence might have

had in isolation, however, was further undercut by the undisputed

testimony    of    Delgado's    ex-husband      that      the   two    had   children

together and maintained an eight-year heterosexual relationship --

including three years of dating and five years of marriage.

Regardless of what the district judge may have previously "learned

and seen in [his] 67 years of age" about "lesbians or gay people

[not] cross[ing] lines to the opposite sex," there was specific,

uncontroverted testimony in this very case that Delgado maintained

an eight-year heterosexual relationship with her ex-husband.

             No evidence was presented that Delgado was not interested

in sexual relationships with men, or even that she preferred women

to   men    as    sexual    partners.        Accordingly,       evidence      of   one

relationship      with     another   woman     had   --   at    best   --    marginal

relevance to the question whether she had a sexual relationship

with Officer I.          Moreover, Delgado's entrapment defense did not

hinge solely on the sexual nature of her relationship with Officer

I, but rather also on testimony that the two had been friends since

middle school, and that Officer I appealed to this relationship and




                                        -83-
solicited her on a near-daily basis for approximately one month

before she acquiesced to provide security for the sham transaction.

            As evinced in part by the government's persistence in

hammering   the   largely      irrelevant        point   of    Delgado's      same-sex

relationship,     evidence     of       homosexuality    has     the    potential   to

unfairly prejudice a defendant.                  See, e.g., United States v.

Yazzie,   59    F.3d   807,    811       (9th    Cir.    1995)    ("[E]vidence      of

homosexuality can be extremely prejudicial . . . ."); United States

v. Ham, 998 F.2d 1247, 1252 (4th Cir. 1993) ("We accept without

need of extensive argument that implications of . . . homosexuality

. . . unfairly prejudice a defendant." (footnote omitted)); State

v. Ford, 926 P.2d 245, 250 (Mont. 1996) ("There will be, on

virtually every jury, people who would find the lifestyle and

sexual    preferences     of        a     homosexual      or     bisexual      person

offensive. . . .        [O]ur criminal justice system must take the

necessary precautions to assure that people are convicted based on

evidence of guilt, and not on the basis of some inflammatory

personal trait."); ABA Standards for Criminal Justice, Prosecution

Function and Defense Function, Standard 3–5.8(c), p. 106 (3d ed.

1993) ("The prosecutor should not make arguments calculated to

appeal to the prejudices of the jury.").                 Given the extremely low

probative value of the evidence pertaining to Delgado's same-sex

relationship,     we   think    it      patently   obvious       that   its    minimal

probative value was substantially outweighed by the dangers of


                                          -84-
unfair prejudice, confusing the issues, and misleading the jury.

See Fed. R. Evid. 403.

             It is true that "[w]e give great deference to a district

judge's balancing of probative value versus unfair prejudice."

United States v. Breton, No. 12-2293, 2014 WL 30517, at *10 (1st

Cir. Jan. 6, 2014).     This is the case "even when a judge does not

expressly explain the Rule 403 balancing process on the record."

Id.   But while our review of a trial court's Rule 403 decision is

deferential, it "is not completely without bite." Espeaignnette v.

Gene Tierney Co., Inc., 43 F.3d 1, 5 (1st Cir. 1994).                    Here, we

find that the trial court abused its discretion because, for the

reasons explained above, the court made a serious mistake in

weighing the danger of unfair prejudice against the testimony's

minimal probative value.          See id.; see also Corporate Techs., Inc.

v. Harnett, 731 F.3d 6, 10 (1st Cir. 2013).

             That determination does not end the inquiry, however.

See Espeaignnette, 43 F.3d at 9.         We may not disturb the verdict if

the error was harmless -- that is, if it did not affect Rivera's

substantial rights.     See id.; see also Fed. R. Evid. 103(a); Fed.

R. Crim. P. 52(a).     For an evidentiary error of non-constitutional

dimension,    the   error    is    harmless   if   we    "can   say   'with    fair

assurance, after pondering all that happened without stripping the

erroneous    action   from    the    whole,   that      the   judgment   was    not

substantially swayed by the error.'"          United States v. Melvin, 730


                                      -85-
F.3d 29, 39 (1st Cir. 2013) (quoting United States v. Sasso, 695

F.3d 25, 29 (1st Cir. 2012)); Espeaignnette, 43 F.3d at 9.          We have

such fair assurance here.

             For many of the same reasons that the testimony at issue

was not highly probative of a fact of consequence in determining

the action, the testimony was unlikely to have substantially swayed

the jury's verdict as to Rivera.          On the theory espoused by the

government and the district court, evidence of Delgado's sexual

orientation was introduced to impugn one aspect of Delgado's

testimony on the improper inducement element of her entrapment

defense -- whether she had a romantic or sexual relationship with

Officer I.     Delgado's sexual orientation has little to do with

whether the elements of the offenses were satisfied as to Rivera or

whether Rivera had a viable defense. The trial testimony and video

provide damning evidence that Rivera participated in the sham

transaction     and   satisfied   the   elements   of   the    offenses    of

conviction.    Furthermore, as previously discussed, Rivera does not

challenge    the   district   court's   ruling   that   no    entrapment   or

derivative entrapment defense was available to him.               For those

reasons, the district court's error in allowing testimony as to

Delgado's sexual orientation was harmless as to Rivera, and we will

not disturb the judgment below on the basis of this error.             See

Fed. R. Evid. 103(a); Fed. R. Crim. P. 52(a); Espeaignnette, 43

F.3d at 9.


                                   -86-
                         ii. Rivera's Sexual Orientation

            Turning to evidence of Rivera's sexual orientation, we

next consider his argument that what he deems to be "homosexual

banter" in the video of the sham transaction -- coupled with

testimony   and    argument   which    suggested   that   he   was   sexually

interested in Officer III, the male undercover agent playing the

role of the buyer -- sent a clear message to the jury about

Rivera's homosexuality in order to "prey on long-standing and

deeply rooted prejudices about homosexuals as deviants, miscreants,

sinners and criminals." Specifically, Rivera directs our attention

to three types of allegedly improper references to his sexual

orientation   at   trial:     (1)   the   "homosexual   banter"   among   the

participants depicted in the video of the sham transaction; (2) the

testimony by Officer I that Rivera wanted the phone number of

Officer III in order to give him a present and "get in touch with

him" after the sham transaction;34 and (3) the testimony by Officer


34
    During its opening statement, the government referenced this
expected testimony from Officer I, arguing that Rivera "was so
comfortable with the situation, he want[ed] a phone number of the
buyer" -- Officer III -- after the deal was over. Indeed, the
government continued to stress that after the sham transaction was
completed, Rivera contacted Officer I "several times" because he
wanted Officer III's phone number. At that point, Rivera's counsel
objected, and asked to approach the bench. The court overruled the
objection without sidebar, explanation, or further discussion,
instructing the government to "[g]o ahead."          The government
continued: "[Rivera] wants his phone number because he has a
souvenir for him and wants to go out with him."           Given the
objection at trial, we review the district court's admission of
this statement in the government's opening for abuse of discretion.
See Powers, 702 F.3d at 10; see also McPheeters v. Black & Veatch

                                      -87-
II that "Angel [Rivera] was kind of interested in the guy, the

other guy that was there" (presumably referring to Officer III).

There were no objections at trial to these three types of evidence

of Rivera's sexual orientation, so we review their admission for

plain error.    See Powers, 702 F.3d at 10.

           Even if it was error to admit the foregoing evidence and

argument, such an error will not permit us to overturn Rivera's

conviction if the error was harmless.     See Fed. R. Crim. P. 52(a);

see also   Landrón-Class, 696 F.3d at 68; United States v. York, 572

F.3d 415, 429 (7th Cir. 2009) ("Under either a plain error standard

or an abuse-of-discretion standard, if those errors were harmless,

[appellant's] conviction will stand.").     Here, we find that "it is

highly probable" that any error in allowing evidence of Rivera's

sexual orientation did not affect the verdict; thus, any such error

was harmless.   See Pridgen, 518 F.3d at 91.

           We agree with Rivera that evidence of his homosexuality

was "relevant to nothing."       However, that same irrelevance cuts

against him on the harmless-error analysis here.     Rivera's sexual

orientation had absolutely nothing to do with whether his conduct

satisfied the elements of the offenses of conviction, or whether he

had a valid defense.    Rivera    fails   to explain -- under the

particular facts of this case -- precisely how evidence of his


Corp., 427 F.3d 1095, 1102 (8th Cir. 2005) ("We review a district
court's management of opening statements for an abuse of
discretion.").

                                  -88-
homosexuality affected the jury's guilty verdict regarding his

participation in the sham transaction.

           Unlike     Delgado,    Rivera    did    not   seek    to   support    an

entrapment defense by presenting testimony and argument that an

undercover agent improperly induced him to participate in the

transaction by means of a romantic or sexual relationship.                      And

Rivera   makes   no    argument   that     the    government's    evidence      was

otherwise so weak that evidence of his homosexuality was likely to

have tipped the scales against him.          Particularly given the highly

incriminating evidence here -- including the video recording and

the testimony of the government witnesses and his codefendant --

there is a high probability that the alleged error concerning

Rivera's homosexuality did not affect the verdict.                     See id.

Therefore, any such error was harmless and cannot serve to overturn

his conviction. See id.; see also Fed. R. Crim. P. 52(a); Landrón-

Class, 696 F.3d at 68; York, 572 F.3d at 429-30.

                      c. Requiring Delgado to Admit the Charges

           In his third allegation of evidentiary error, Rivera

argues that the district court violated his right to a fair trial

when it required his codefendant Delgado to testify whether she

admitted all the allegations of the indictment.                       He further

maintains that "[t]he Court's sua sponte insistence on requiring

Delgado to admit her culpability to the charge that she conspired




                                     -89-
with [Rivera] demolished the presumption of innocence to him, no

matter how she answered."

             Delgado testified in her own defense at trial.                   During

direct    examination      by   her    counsel,       with   regard   to    the   sham

transaction,      Delgado    admitted        that    she   "understood     that   what

[Officer I] was doing was not something legal," and that she

expected that she and Rivera would each make $2,000 for their

participation.          Delgado also testified that "[a]fter all this

insistence" from Officer I, she contacted Rivera, and together they

"decided to go to the place" of the transaction.                         She further

responded in the affirmative when her counsel asked, "Now, you were

aware those were narcotics?            You realized it was something wrong

you   were    doing?"       There     were    no    objections   to   any    of   this

testimony.

             The government began its cross-examination of Delgado by

immediately asking whether she admitted to participating in the

drug transaction.        She agreed, saying, "I've admitted I did it, as

I said, and I repeat, because of [Officer I's] insistence and

because      of   the    relationship,         the    sentimental     or    romantic

relationship I had with him and my trust in him."                     Hearing that,

the government pressed her further: "So you admit every count in

this Indictment; is that correct?"                   Delgado responded, "I was

there, I repeat, I didn't --."               The district judge cut her short,

interjecting, "[t]he question is whether -- we want an answer


                                        -90-
whether you admit all the charges that are against you in this

accusation.    That's all."

             Delgado's counsel objected, arguing that the question

improperly elicited an answer as to the charges, although Delgado

had already entered a plea. The court overruled the objection, and

the government continued to press the point, asking whether she did

the things alleged in the indictment. Delgado continued to respond

that she "was there, and [her actions were] wrong."    She admitted

that she knew the transaction involved drugs, but she did not admit

that she knew the type of drug or the quantity involved.     Again,

Rivera's counsel did not object to this line of questioning.

              On appeal, Rivera argues that the district court erred

by not "remain[ing] alert" to his right against self-incrimination

when Delgado waived her own right in her testimony at trial.     In

Rivera's view, the district court "demolished the presumption of

[his] innocence" when it forced Delgado to admit the charges on the

stand, requiring Rivera "to rebut this powerfully incriminating

evidence."    Rivera further complains that no appropriate curative

instruction was given, and argues that this was a plain error of

constitutional dimension.

             We agree with Rivera that it was highly improper -- for

not just the prosecution, but especially for the trial judge

himself -- to ask Delgado on the stand whether she admitted all the

charges against her.    See, e.g., United States v. Levine, 180 F.3d


                                 -91-
869, 872 (7th Cir. 1999) (stating that "the judge [must] make[] it

clear to the jury that neither the questioner nor the witness

defines the elements of the offense"); United States v. Espino, 32

F.3d 253, 257 (7th Cir. 1994) (finding the question whether the

defendant was "admitting the conspiracy" to be improper because it

required     a   conclusion     about     the   legal    consequences    of   the

defendant's conduct, and not just about the predicate facts for

such a conclusion -- namely, the existence of a conspiratorial

agreement).      Even assuming an error of constitutional dimension

with respect to the questions asked of Delgado, however, we find

that   the   government    has    met   its     burden   of   proving   beyond   a

reasonable doubt that the error did not influence Rivera's verdict.

See Melvin, 730 F.3d at 39 (quoting Sasso, 695 F.3d at 29).

             With respect to the relevant testimony elicited from

Delgado on cross, she did not ultimately yield to the demands of

the prosecution and the district court to state a legal conclusion

as   to   whether   she   was    guilty    of   the   counts   charged   in   the

indictment.      Nor did she make any factual admissions that were

materially different from her testimony on direct examination.

Delgado's testimony, on both direct and cross, was consistent with

her theory of the case -- namely, that she participated in the sham

transaction, but that she was entitled to an entrapment defense

because she was improperly induced by Officer I.                 Therefore, the

exchange of which Rivera complains did not alter the nature or


                                        -92-
extent of the evidence before the jury.        We are convinced beyond a

reasonable doubt that the introduction of Delgado's redundant

testimony on cross did not influence the verdict; hence, any error

on this issue was harmless.      See id.

                     d. Restriction of Cross-Examination, and Opinion
                        Testimony from Lay Witnesses

            Lastly, Rivera seeks to piggyback on Delgado's arguments

regarding two final alleged evidentiary errors: (1) that the

district court unduly restricted cross-examination to issues raised

on direct, thereby refusing to allow proper impeachment questions;

and (2) that the court erred by admitting inadmissible lay opinion

testimony from Delgado's ex-husband.

            Rivera's brief devotes a grand total of five sentences to

addressing these two issues.           And two of those five sentences

merely state that Rivera adopts the relevant arguments presented in

Delgado's   brief.      Rivera   was   certainly   entitled   to   join   in

Delgado's brief or to adopt by reference parts of her brief.              See

Fed. R. App. P. 28(i).      However, "[a]doption by reference cannot

occur in a vacuum and the arguments must actually be transferable"

from Delgado's case to Rivera's appeal.            See United States v.

Brown, 669 F.3d 10, 16 n.5 (1st Cir. 2012).           "In this context,

issues that are averted to in a perfunctory manner absent developed

argumentation are waived."        Id.      Here, as in Brown, Rivera's

attempt to join Delgado's arguments on these two errors was



                                   -93-
"textbook perfunctory -- he offered no explanation as to why her

arguments pertained to him."        See id.

            Delgado's argument on the first issue focused on her

claim that the improper limitations on the cross-examination of

Officer I "prevented Delgado [] from presenting important evidence

that aided her in establishing her only defense, that she was

entrapped   by   [Officer    I]   into   participating     in   the   offense

conduct."    With respect to the second issue, Delgado argued that

the admission of improper lay opinion testimony from her ex-husband

"cannot be considered harmless since precisely the matter [on]

which he expressed an opinion o[r] belief concerned the most

crucial ultimate issue of fact at trial; that the jury should

reject Delgado['s] entrapment defense based on his opinion as to

what he would do under similar circumstances."            Thus, both issues

concern Delgado's sole defense of entrapment.

            As previously discussed, Rivera does not appeal the

district court's ruling that no such defense was available to him.

Having failed to "'connect the arguments adopted with the specific

facts   pertaining'   to    him,"   Rivera    has   not   properly    adopted

Delgado's arguments.       See United States v. De La Paz-Rentas, 613

F.3d 18, 29 (1st Cir. 2010) (quoting United States v. Bennett, 75

F.3d 40, 49 (1st Cir. 1996)).       For that reason, Rivera has waived

these two issues.     See Brown, 669 F.3d at 16 n.5.         Moreover, even

without a finding of waiver, we are convinced that any alleged


                                    -94-
error with respect to these two evidentiary issues was harmless.

See Melvin, 730 F.3d at 39.

                         e. Cumulative Error

             Having found that none of the five evidentiary errors

alleged by Rivera are individually cause for relief, we turn

finally to his claim that these errors cumulatively undermined his

right   to    a       fair   trial.      We    have      previously   accepted    the

"theoretical underpinnings" of such a cumulative-error claim --

namely, that "[i]ndividual errors, insufficient in themselves to

necessitate       a    new   trial,    may    in   the    aggregate   have   a   more

debilitating effect."           United States v. Sepulveda, 15 F.3d 1161,

1195-96 (1st Cir. 1993).              In examining such claims, we weigh the

trial errors "against the background of the case as a whole, paying

particular weight to factors such as the nature and number of the

errors committed; their interrelationship, if any, and combined

effect; how the district court dealt with the errors as they arose

(including the efficacy -- or lack of efficacy -- of any remedial

efforts); and the strength of the government's case." Id. at 1196.

             Rivera was entitled "to a fair trial, not to a mistake-

free trial."          See id.   Considering the nature of the errors here,

we find that these errors were largely tangential to facts material

to the jury's adjudication of Rivera's guilt.                         As previously

described, the government's case against Rivera was strong; it

included testimony by three government agents involved in the


                                         -95-
sting, as well as a video depicting Rivera's participation in the

sham transaction. Moreover, Rivera's codefendant Delgado testified

that she and Rivera participated in the transaction.             On this

record, we cannot say that the five alleged evidentiary errors

cumulatively "call into doubt the reliability of the verdict and

'the underlying fairness of the trial.'"          See United States v.

Sanabria, 645 F.3d 505, 519 (1st Cir. 2011) (quoting United States

v. Meserve, 271 F.3d 314, 332 (1st Cir. 2001)).          Therefore, like

his     individual   allegations   of     evidentiary   error,   Rivera's

cumulative-error claim must also fail.

                            III. Conclusion

            Based on the foregoing, Delgado's convictions are vacated

and her case is remanded for a new trial.

            With respect to Rivera's case, for the reasons described

above, his sentence cannot stand in light of the Supreme Court's

decision in Alleyne.        We therefore withhold judgment on his

convictions for thirty days, during which time the government can

request either that we affirm Rivera's convictions and remand for

resentencing under 21 U.S.C. § 841(b)(1)(C), or that we vacate

Rivera's convictions and remand for a new trial, allowing the

question of drug quantity to be properly submitted to a jury

applying the beyond-a-reasonable-doubt standard.

            Vacated and remanded in part, and judgment withheld in

part.


                                   -96-
