          United States Court of Appeals
                     For the First Circuit



Nos. 13-2113
     13-2118
                    UNITED STATES OF AMERICA,

                            Appellee,

                               v.

               JOSÉ LÓPEZ-DÍAZ; CARLOS LÓPEZ-DÍAZ,

                     Defendants, Appellants.



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

        [Hon. Francisco A. Besosa, U.S. District Judge]



                             Before

                   Lynch, Kayatta, and Barron,
                         Circuit Judges.



     John H. Cuhna, Jr., with whom Jaime Zambrana and Cuhna &
Holcomb, P.C., were on brief, for appellant José López-Díaz.
     H. Manuel Hernández for appellant Carlos López-Díaz.
     John A. Mathews II, Assistant United States Attorney, with
whom Rosa Emilia Rodríguez-Vélez, United States Attorney, and
Nelson Pérez-Sosa, Assistant United States Attorney, Chief,
Appellate Division, were on brief, for appellee.
July 13, 2015
           KAYATTA,      Circuit Judge.       These consolidated appeals

present a rare example of a trial record that lacks sufficient

evidence to support a guilty verdict returned by a jury.              Carlos

López-Díaz ("Carlos"), a dentist, operated a mobile dental clinic

in Puerto Rico.1      His brother, José López-Díaz ("José"), is a

medical   doctor   who    billed   Medicare    for   services   to   Carlos's

patients that José never provided.            The jury convicted José of

health-care fraud, conspiracy to commit health-care fraud, and

aggravated identity theft for using personal information gathered

from Carlos's patients.       Based on the fact that Carlos gave José

access to his patient billing information while knowing that José

never treated, or even saw, any of the patients, the government

also obtained a verdict against Carlos on the conspiracy and

aggravated identity theft charges.            While we find no error in

José's convictions, we reverse the verdict against Carlos because

the prosecution did not present enough evidence to support his

convictions without undue speculation.

                              I.   Background

           We limit our summary here to the basic contours of the

health-care fraud scheme and proceedings below, reserving a fuller

exposition of the relevant facts in the proper light for our



     1 For the sake of convenience, we refer to the defendants by
their first names only.
                                    - 3 -
discussion of particular issues.                 See United States v. Flores-

Rivera, 787 F.3d 1, 9 (1st Cir. 2015).

             Between    January        2006    and    July      2011,   José    submitted

10,231      claims      for     reimbursement              to      Medicare,     totaling

approximately $3,500,000, of which Medicare actually paid about

$700,000.     He submitted the claims using Health Insurance Claim

Form 1500 ("CMS 1500 Form"), a form used for Medicare billing by

Centers     for   Medicare       and     Medicaid          Services     ("CMS"),      which

administers the Medicare program.                    As it turns out, José never

provided    any   of    the    medical        procedures        for   which    he    sought

reimbursement.         In some instances, he claimed to have provided

services to Medicare beneficiaries who were deceased.                               He also

repeatedly billed for the same unusual procedures.                             José filed

1,177 claims (far more than anyone else in Puerto Rico) for a

procedure typically performed by urologists, and more than half of

those claimed urological procedures were for female patients, even

though the procedure can be performed on male patients only.

             In order to submit those false claims, José needed the

Medicare     beneficiaries'            identifying           and      health     coverage

information.      His principal sources were the patient records of

his brother Carlos, a licensed dentist.                         Beginning sometime in

2007, Carlos operated a mobile dental clinic--essentially, a large

trailer    with   three       dental    chairs       and    necessary     equipment--to

provide dental services to underserved patients at nursing homes,


                                         - 4 -
mental   health   residential    facilities,       and   schools.     Carlos

employed a coordinator to visit potential facilities, market the

clinic, schedule visits, and collect patient medical histories,

consent and release forms, and health coverage information before

the mobile clinic visited each facility. Carlos also employed two

dental assistants.

           José never treated or even saw any of Carlos's patients.

Rather, José testified that Carlos gave him access to dental

patient information as part of a safety protocol developed by the

brothers after one of Carlos's elderly patients suffered a heart

attack or stroke in the mobile clinic in late 2007, an event

confirmed by the director of the stricken patient's nursing home.

Two of the witnesses called by the government, Leslie Williams-

Nieves ("Williams") and Nahír Rodríguez-Candelario ("Rodríguez"),

explained that they were told that a regulation enacted by the

Puerto Rico State Department required Carlos to have his patients

medically evaluated and to use a medical consultant.            When asked

about this regulation, José said that he could not recall its

name.2    Pursuant   to   the   protocol,   José    paid   Carlos's   dental

assistants to take and record vital signs of dental patients before

Carlos treated them, with José available for phone consultations,



     2 José also testified that he and Carlos learned at a
conference on mobile clinics that a mobile dental clinic should
have a consulting physician.


                                  - 5 -
and José would later review the patient files, vital signs, and

medical histories to see that Carlos's staff was acting properly.3

The parties agree that José did indeed pay the dental assistants

to take and record patient vital signs, and the actual patient

records show that José did review, or at least initial, that

information   in   each   record.     According   to   José's   testimony,

"[t]here are several formulas through which the physician can be

paid for these services."

          José also gathered from Carlos's patient records the

personal identifying information needed to bill Medicare.            José

used that information to complete and submit CMS 1500 Forms for

medical procedures that he never performed on those patients. José

paid Williams4 and Rodríguez,5 employees of his wife's pediatric



     3One of Carlos's dental assistants testified that José "would
be given the vital signs taken from patients. And then he would
correct them, he would observe them."
     4 For eight or nine months in 2009 and 2010, Williams completed
sections of CMS 1500 Forms for José using a "log book" that listed
the necessary billing information. In May 2010, three months after
she stopped billing for José, Williams began working during the
evenings for Carlos, entering patient billing information into an
electronic database. At that point, Williams realized based on
the service locations in Carlos's patient files and in José's log
book that José's patient information came from Carlos's patient
files.
     5 From April 2010 to July 2011, Rodríguez worked for Carlos
on Fridays entering patient data from Carlos's patient files into
a computer. From August to December 2010, Rodríguez also entered
patient information into CMS 1500 Forms for José, for which José
paid her $1 per form. Rodríguez recognized the patient files she
used for José's CMS 1500 Forms as Carlos's dental patient files.


                                    - 6 -
clinic, to complete his CMS 1500 Forms using information gleaned

from Carlos's patient files.                    Williams and Rodríguez also did

separate          billing   and    data    entry   work   part-time    for   Carlos.

Williams and Rodríguez testified that they filled out José's CMS

1500 Forms either at their own homes or at José's home office, and

never in Carlos's presence or at his office.                        The government

stipulated that Carlos did not sign or prepare any of José's CMS

1500 Forms, and that Carlos's name did not appear on those forms.

                  Investigators eventually caught on to José's falsified

bills, and a grand jury indicted José, Carlos, Williams, Rodríguez,

and others for conspiracy to commit health-care fraud in violation

of 18 U.S.C. § 1349 (count one) and health-care fraud in violation

of 18 U.S.C. § 1347 (counts ten through thirty), and José and

Carlos for aggravated identity theft in violation of 18 U.S.C.

§ 1028A(a)(1) (counts thirty-one through thirty-five).                     All of the

defendants except for Carlos were also indicted for additional

counts of health-care fraud (counts two through nine).6                      After a

fifteen-day trial, the jury convicted José of all counts.7                          The

jury       also    convicted      Carlos   of    the   conspiracy   and   aggravated

identity theft counts, but acquitted him of the substantive health-


       6
       Prior to trial, the government dropped the charges against
all other indicted conspirators, and called Williams and Rodríguez
as witnesses in the government's case-in-chief.
       7
       The government dismissed one count                     (count      twenty)   of
substantive health-care fraud before trial.


                                           - 7 -
care fraud counts.             The district court sentenced José to a total

of 121 months in prison.            Carlos received a total prison sentence

of thirty-six months and a day.                    Carlos and José timely filed

separate appeals challenging their convictions.8

                II.    Carlos's Insufficiency of the Evidence Claim

                  We turn first to Carlos's appeal from the order denying

his motion for acquittal based on insufficient evidence to convict.

See Fed. R. Crim. P. 29.             We review de novo the denial of a Rule

29 motion for acquittal, asking whether a reasonable jury could

find guilt beyond a reasonable doubt.                  United States v. Burgos-

Montes, 786 F.3d 92, 112 (1st Cir. 2015). In assessing a challenge

to the sufficiency of the evidence, we "examine the evidence,

together with all inferences that may be reasonably drawn from it,

in the light most favorable to the prosecution."                United States v.

Andújar, 49 F.3d 16, 20 (1st Cir. 1995).                 Where, as here, "a jury

draws inferences from circumstantial evidence, a reviewing court

should refrain from second-guessing the ensuing conclusions as

long       as    (1)    the   inferences   derive    support   from   a   plausible

rendition of the record, and (2) the conclusions flow rationally

from those inferences."             United States v. Spinney, 65 F.3d 231,

234 (1st Cir. 1995). Our deference to jury verdicts is not without

limit, however:               "[I]f the evidence viewed in the light most



       8   This court consolidated the two appeals.


                                           - 8 -
favorable to the verdict gives equal or nearly equal circumstantial

support to a theory of guilt and a theory of innocence of the crime

charged, this court must reverse the conviction," because in such

a case "a reasonable jury must necessarily entertain a reasonable

doubt."   United States v. Flores-Rivera, 56 F.3d 319, 323 (1st

Cir. 1995) (internal quotation marks and emphasis omitted).

          The parties agree that the conspiracy charge9 against

Carlos turns largely on whether the jury could reasonably find

that Carlos "knew" that his brother was defrauding Medicare.   The

parties likewise agree that the aggravated identity theft counts

required the jury to find that Carlos, either as a principal or

aider and abettor, "knew" of the underlying health-care fraud.10


     9 18 U.S.C. § 1349 provides as follows:      "Any person who
attempts or conspires to commit [health-care fraud] shall be
subject to the same penalties as those prescribed for the offense,
the commission of which was the object of the attempt or
conspiracy."    The substantive offense of health-care fraud
consists of (a) "knowingly and willfully execut[ing], or
attempt[ing] to execute, a scheme or artifice," either (1) "to
defraud any health care benefit program," or (2) "to obtain, by
means of false or fraudulent pretenses, representations, or
promises, any of the money or property owned by, or under the
custody or control of, any health care benefit program"; and doing
so (b) "in connection with the delivery of or payment for health
care benefits, items, or services." Id. § 1347.
     10 To convict Carlos for aggravated identity theft, the
government needed to prove that, "during and in relation to
[health-care fraud], [the defendant] knowingly transfer[red],
possesse[d], or use[d], without lawful authority, a means of
identification of another person." 18 U.S.C. § 1028A(a)(1); see
also id. § 1028A(c)(5).   To convict Carlos under an aiding and
abetting theory, the government needed to establish, among other
things, that Carlos "consciously shared [José's] knowledge of the
underlying criminal act, and intended to help [José]."     United

                              - 9 -
Such knowledge for either offense could be proven by knowledge in

fact, or by proof of "willful blindness."      To establish willful

blindness, the government had to show that Carlos (1) "was aware

of a high probability of wrongdoing," and (2) "consciously and

deliberately avoided learning of the wrongdoing."     United States

v. Appolon, 695 F.3d 44, 57 (1st Cir. 2012).

          The government did manage to prove that Carlos knew that

José gathered from the files of Carlos's patients information to

be used by José to bill Medicare for something.    In its brief and

at argument, the government also claimed that the evidence showed

that Carlos paid his employees to complete the CMS 1500 Forms used

by José to bill Medicare.   Apparently accepting the government's

view of its proof in denying Carlos's motion to acquit, the

district court expressly pointed to such payments by Carlos.    See

United States v. López-Díaz, 940 F. Supp. 2d 39, 64 (D.P.R.

2013) ("[Carlos] even paid his employees for filling out billing

forms when [José] was unable to pay them.").      As the government

clarified after oral argument, however, the record shows only that

Carlos paid his employees to record his patients' vital signs for

José's review, and only when José was unavailable to make this

payment himself.11 Further, the government points us to no evidence


States v. Lyons, 740 F.3d 702, 715 (1st Cir. 2014) (quoting
Spinney, 65 F.3d at 235).
     11Carlos also paid Williams and Rodríguez to help with billing
and data entry for his legitimate dental services. There is no

                              - 10 -
that José needed (or even used) the vital signs data to deceive

Medicare.

              Of   course,       if    Carlos    knew    that    José    had   no   basis

whatsoever to bill Medicare for any amount in connection with

Carlos's patients, then his knowledge that José was billing for

something could suffice to sustain the verdict.                         So the question

is posed:     Did Carlos know that José could not bill merely for the

gathering and review of vital signs information?                        On this crucial

point, the record is a complete blank.                   The record does not even

show that such a file review is not billable, much less that Carlos

knew it was not billable.                 The government did not submit any

evidence challenging the existence of the regulation that its own

witnesses     cited   as     a    reason       for   taking     the    vital   signs    and

reviewing them.       Nor did it seek an instruction on the regulation.

The   government      also       failed    to    counter      José's    testimony      that

"[t]here are several formulas through which the physician can be

paid"   for    services      to       mobile    dental   clinics.         Instead,     the

government simply argued in closing that José did not bill for

reviewing the vital signs.                This was a compelling point against

José, but carried weight against Carlos only if there was evidence

that Carlos knew what José was billing for.




evidence that Carlos ever paid Williams and Rodríguez to help José
with his billing.


                                          - 11 -
          In an effort to fill this gap, the government in its

brief tells us that Carlos "is also a medical provider, submits

dental billing claims himself, and understands what is required of

medical provider [sic] in order to submit claims."        Cf. United

States v. Singh, 390 F.3d 168, 188 (2d Cir. 2004) (jury could infer

that physician/clinic owner was aware that claims he submitted

were false, based on his possession of and familiarity with the

applicable billing code guidebook and manual, and discussions with

employees revealed his "detailed knowledge" about billing).      The

government, however, cites no evidence to support this crucial

assertion, nor can we find any.   To the contrary, the record shows

that the dental billing codes (with which one could assume Carlos

was familiar) were so different from the physician billing codes

that the government's own witness on Medicare billing professed

almost complete ignorance about dental billing codes.12

          Our own review of the record points to no other means to

close this gap.   Notwithstanding the indictment's express charge

that the aim of the conspiracy was to enrich both José and Carlos,

there is no evidence at all that Carlos received even one penny of

the fraudulent proceeds.   What little else we could find on our

own review of the record added nothing to the government's case;


     12 While some evidence supported an inference that Carlos
sometimes billed Medicare Advantage plans, there was no evidence
that he used medical or surgical billing codes, rather than dental
billing codes, in order to bill those plans.


                              - 12 -
rather, it helped Carlos.13   We also do not think that whether and

when file reviews are billable to Medicare are matters of common

knowledge that lay jurors might bring to bear to connect the too-

widely spaced dots in the government's case.

          José's   behavior   as   described   by   the   government's

evidence offered no hint that Carlos was aware of the nature of

José's billing.    The fact that José indisputably initialed the

patient files suggests strongly that he was trying to deceive

someone other than Medicare (e.g., Carlos?), given that the vital

signs data from Carlos's patients provided no information that

José used to bill or to justify billing for the surgical and other

procedures he claimed to have performed.       José was also careful

that Williams and Rodríguez, his wife's employees whom he paid to



     13 Carlos's clinic coordinator marketed the dental clinic to
directors of nursing homes and residential facilities in part
through PowerPoint slides. One slide indicated that the clinic
had a "consultant physician," whom the coordinator understood to
be José.    That same coordinator, who also collected patients'
medical histories, testified that José told her to focus on whether
the patient had had recent surgery, in order to prevent adverse
reactions to the dentist's anesthesia. And the consent and release
forms that the coordinator collected from Carlos's patients did
not clearly prohibit use of patient information to bill for a file
review by another doctor.     The forms stated that the patients
consented to use of their information to "carry out your treatment,
payment activities and operations in your health care."         The
attached notice of privacy practices informed the patients that
Carlos "may use your health information for treatment (e.g.,
sending copy of your clinical information to a specialist as part
of your referral), to obtain payment for treatment (e.g., bill an
insurance agency), or for other health care operations (e.g.,
evaluate the quality of treatment you receive)" (emphasis added).


                               - 13 -
fill out the demographic and health plan sections of his CMS 1500

Forms, performed their task out of Carlos's presence.               Neither did

those two employees suggest that Carlos knew the services for which

José was billing.

              Though not clear from its brief, the government appears

to argue that the jury could infer Carlos's knowledge of José's

fraud if the jury doubted the utility of the treatment protocol,

and thus the plausibility of Carlos's explanation for handing his

files to José.      If the evidence allowed the jury to conclude that

the treatment protocol was obviously useless, then the jury might

have inferred that Carlos could not possibly have thought the

protocol valuable.          And from that the jury could, perhaps, have

further inferred that Carlos must have had some other, criminal,

reason for handing over his patient files to José, and thus still

further inferred that Carlos must have had the requisite knowledge

of José's fraud.

              The government, though, did not present any evidence to

support such a chain of inferences.              Acting almost as if it bore

no   burden    of   proof    in   making   its    case   against    Carlos,   the

government did not present any direct evidence that the protocol

was, in fact, not an accepted or recognized method of ensuring

that   the    mobile   clinic's     practice      was    adhering   to   medical




                                     - 14 -
standards.14   Nor did the government present any direct evidence

that Carlos believed the protocol was useless.           And, indeed, the

fact that Carlos supervised his dental assistants in taking vital

signs--and paid them for doing so when José was out of town--would

seem to suggest that Carlos viewed the protocol as beneficial.           As

a result, the record cannot support the first link in a chain of

inferences that would be needed to justify the jury's verdict

against Carlos on these grounds.        See United States v. Burgos, 703

F.3d 1, 10 (1st Cir. 2012) ("[W]e are loath to stack inference

upon inference in order to uphold the jury's verdict." (quoting

United States v. Valerio, 48 F.3d 58, 64 (1st Cir. 1995))).

           Our respect for a jury's ability to get it right does

nevertheless cause us to pause cautiously before concluding that

the evidence is insufficient to support the verdict.              We note,

though, that the prosecutor in closing told the jury that "it

doesn't matter for purposes of this case if [Carlos] knew what

[José] was writing on those [CMS 1500 forms].           It doesn't make a

difference."   The prosecutor also seems to have slipped into an

argument   based   on   a   lesser    negligence   standard,   rather   than

knowledge or willful blindness: "[Carlos], as a dentist, should



     14The government also failed to challenge one of the apparent
rationales for the protocol, that it was required by some
Commonwealth regulation.    If there is no such regulation, the
government easily could have called witnesses from the relevant
Puerto Rico government departments to debunk this rationale.


                                     - 15 -
have known better, or should have known better to question himself-

-or his brother in this case--what he was billing for if he--once

he knew he wasn't even seeing his patients."                  While we have not

been asked to vacate the verdict because of these statements, and

while the statements might be read in context in a manner that

would        render    them   proper,   they   do   explain   how   a   jury   could

mistakenly convict Carlos in light of the absence of any evidence

that his brother could not bill Medicare at all for his work under

the protocol, or that Carlos knew of or willfully ignored such a

limitation.           We have in mind, too, the fact that in a three-week

trial focused mostly on José, both the prosecutor and the trial

judge themselves mistakenly thought that Carlos paid to have some

of José's falsified claim forms completed.15              In any event, the key

point now is that the record contains insufficient evidence to

support a reasonable inference that, beyond a reasonable doubt,

Carlos knew that José had no basis for submitting any type of claim

in connection with his review of Carlos's patient records.

                We therefore vacate Carlos's convictions and remand for

a judgment of acquittal of Carlos on all counts.16




        15
       See López-Díaz, 940 F. Supp. 2d at 64 ("[Carlos] even paid
his employees for filling out billing forms when [José] was unable
to pay them.").
        16   We need not address Carlos's remaining arguments.


                                        - 16 -
                           III.      José's Claims

            José does not challenge on appeal the sufficiency of the

evidence against him on any of the counts.             Rather, he points to

what he claims are errors in the indictment, the review of alleged

Brady material, and the jury instructions.                We address these

claimed errors in turn.

A.    The Sufficiency of the Indictment's Aggravated Identity Theft
      Counts

            José first argues that the aggravated identity theft

counts (counts thirty-one through thirty-five) of the superseding

indictment were defective for lack of a corresponding substantive

health-care fraud count.        The aggravated identity theft counts of

the indictment alleged that José knowingly possessed, transferred,

or   used   the    identification    of   another    person   without   lawful

authority    "in     relation   to    felony   violations     enumerated   in

subsection (c) [of 18 U.S.C. § 1028A] as: (1) Healthcare Fraud, a

violation of [18 U.S.C. § 1347], not charged herein."             Each count

listed a specific individual whose identity was used to commit the

offense.     The indictment did not include separate section 1347

health-care fraud charges with respect to the individuals named in

the aggravated identity theft counts.          According to José, because

the government did not separately charge and convict him of the




                                     - 17 -
predicate    health-care   fraud   crimes    underlying   the     aggravated

identity theft charges, the indictment was defective.17

            The   predicate   felony   violation   in   section    1028A    is

simply an element of the crime of aggravated identity theft.               The

statute requires proof beyond a reasonable doubt of a felony

violation, not a felony conviction.         It therefore did not require

the government to charge José separately with the predicate health-

care fraud offenses.    See United States v. Stepanian, 570 F.3d 51,

59-60 & n.15 (1st Cir. 2009) ("To the extent [the defendant] wishes

to argue that the government must separately allege and charge the

predicate crime in order to charge a § 1028A offense . . . the

statutory language lends no support to that proposition."); see

also United States v. Jenkins-Watts, 574 F.3d 950, 970 (8th Cir.

2009).    Moreover, the indictment adequately informed José that the

predicate offenses for the aggravated identity theft counts were

health-care fraud crimes "not charged herein."          See United States

v. Savarese, 686 F.3d 1, 6 (1st Cir. 2012) ("[A]n indictment is

adequate if it specifies the elements of the offense charged,

fairly apprises the defendant of the charge against which he must

defend, and allows him to contest it without fear of double




     17 Although the basis for this claim of error is not clear
from José's brief, we interpret this argument to be a challenge to
the sufficiency of the indictment.


                                   - 18 -
jeopardy.").        We therefore detect no error in the aggravated

identity theft counts of the indictment.

B.   In Camera Review of Potential Brady Material

             José next faults the district court for rejecting his

request to order the government to turn over documents José claims

were potentially exculpatory.       See Brady v. Maryland, 373 U.S. 83,

87 (1963) (government has an obligation to disclose evidence in

its possession favorable to a criminal defendant and material to

guilt).      In particular, José argues that he was entitled to

materials related to a government search of the offices of one of

the Medicare Advantage insurers he fraudulently billed, Medical

Card System ("MCS").

             Both    defendants   filed     separate   pre-trial    motions

requesting specific exculpatory and impeachment material.               The

requested information included the following materials:

             Any documents, reports, affidavits in support
             of search warrants, grand jury subpoenas, or
             other materials and information regarding any
             investigation of any wrongdoing by any health
             insurance company that processes any Medicare
             or other insurance claim that is the subject
             of the charges alleged in the indictment,
             including, but not limited to, MCS . . . .

The district court referred the matter to a magistrate judge, who

granted the defendants' request subject to a protective order that

restricted    the    disclosure   and   use   of   patients'   individually

identifiable health information.          The government did not disclose



                                  - 19 -
prior to trial any documents related to a search warrant executed

at MCS.   On the fifth day of trial, however, before the defendants

cross-examined   a   fraud   investigator   at   MCS,   Carlos's   defense

attorney renewed his request in light of press coverage of a

government search of MCS offices.     The government agreed to review

the MCS search documents during a pre-scheduled eight-day break in

the trial, and to disclose any exculpatory or impeachment material,

while complying with the protective order.        On cross-examination,

the MCS fraud investigator confirmed that government agents had

searched the MCS office, but she did not speak with the agents and

did not know whether the investigation was ongoing.

           The government again produced no documents, and on the

next day of trial, Carlos's attorney asked that "the Court order

them to produce those records or that they be submitted to the

Court and that copies be left in the record under seal for future

review, if necessary."       The government agreed to provide the MCS

search warrant affidavit for the court's in camera review, to

determine if the search may have revealed information relevant to

Carlos and José's case.      The next day, the district court informed

counsel that its "review of the search warrant, the application,

and affidavit has completed, and I don't think any of it has any

relevance to this case. . . . [Y]our motion is denied."               The

district court then denied Carlos's motion to seal the search

warrant, application, and affidavit and make those documents part


                                  - 20 -
of the record in this case, because the court was "worried about

making it a part of this record even as a sealed document."                The

district court and government noted that the documents could be

made available to this court if necessary for appellate review.

Shortly thereafter, José's counsel joined Carlos's motions.

            On appeal, José asks us to review the search warrant,

application, and affidavit to determine whether the district court

erred in refusing to require disclosure by the government.                  We

review a district court's Brady determinations after its in camera

review for an abuse of discretion.            United States v. Rosario-

Peralta, 175 F.3d 48, 57 (1st Cir. 1999); see also United States

v. Caro-Muñiz, 406 F.3d 22, 28-29 (1st Cir. 2005).

            We decline the invitation to join José on his fishing

expedition.     His theory about the relevance of the MCS documents

is   that   those    documents   "could     have   very    well"   contained

instructions from MCS to physicians, including José, to submit

false information on CMS 1500 Forms, thereby corroborating José's

testimony     that   he   used   inaccurate   billing     codes    based    on

instructions from health insurance companies.             How such evidence

would have exonerated José from billing for urological services

performed on women whom he did not treat is a complete mystery

concerning which José offers no insight. Additionally, José points

to nothing that suggests that the government's search of MCS had

anything to do with its telling doctors to use incorrect billing


                                   - 21 -
codes.     Hence his theory of relevance amounts to little more than

"mere speculation."    United States v. Prochilo, 629 F.3d 264, 269

(1st Cir. 2011).     The district court therefore would have acted

well within its discretion even if it had refused to conduct the

in camera review in the first place.         See id. at 268-69 ("To

justify [in camera] review, the defendant must make some showing

that the materials in question could contain favorable, material

evidence.      This showing cannot consist of mere speculation."

(citations omitted)).     Because José's request amounts to no more

than a "shot in the dark," United States v. Espinal-Almeida, 699

F.3d 588, 618 (1st Cir. 2012), we find it unnecessary to review

the sealed documents that the district court viewed in camera.

C.   Challenges to the Jury Instructions

      1.    Prior Knowledge for Aiding and Abetting

             José claims that the district court erred in failing to

instruct the jury that, in order to convict him of aiding and

abetting aggravated identity theft, the jury had to find that José

had "prior knowledge" of one purported element of aggravated

identity theft: that the patients' identifying information was

obtained without lawful authority.18     In support of this argument,


      18José also argues that, for the counts of conviction
involving deceased patients, he needed prior knowledge that the
patients were in fact deceased when José claimed to have treated
them.   None of the aggravated identity theft counts involve
deceased beneficiaries, however, so we need say nothing more about
this argument.


                                - 22 -
José cites Rosemond v. United States, 134 S. Ct. 1240 (2014), in

which the Supreme Court held that, to convict a defendant for

aiding and abetting the knowing use of a firearm during and in

relation to a drug trafficking crime under 18 U.S.C. § 924(c), the

government must prove that the defendant had advance knowledge of

each element of the offense (i.e., the drug part and the gun part).

Id. at 1248-49.

          José did not request that the district court give the

instructions he now claims it should have given.    To the contrary,

he asked the court to give an instruction materially the same as

that which it gave.   José therefore arguably waived this challenge

to the jury instructions.   See United States v. Alberico, 559 F.3d

24, 27 (1st Cir. 2009).

          Even if José did not waive the argument, his failure to

object would justify only plain error review, see Fed. R. Crim. P.

30(d), 52(b), a standard José fails to satisfy.    See United States

v. Duarte, 246 F.3d 56, 60 (1st Cir. 2001) ("Review for plain error

entails four showings: (1) that an error occurred (2) which was

clear or obvious and which not only (3) affected the defendant's

substantial rights, but also (4) seriously impaired the fairness,

integrity, or public reputation of judicial proceedings.").     The

so-called element of which José says he needed prior knowledge--

that the identifying information was initially obtained without

lawful authority--is not actually an element of the offense.


                               - 23 -
Section 1028A punishes the knowing transfer, possession, or use

without      lawful   authority       of    protected      information,   18    U.S.C.

§   1028A(a)(1),      regardless       of    how    that   information    was    first

obtained.      United States v. Ozuna-Cabrera, 663 F.3d 496, 499 (1st

Cir. 2011) ("[R]egardless of how the means of identification is

actually obtained, if its subsequent use breaks the law . . . it

is violative of § 1028A(a)(1).").                  Even if an instructional error

had occurred, it could not have affected José's substantial rights.

The evidence overwhelmingly showed that José knew that he did not

have the patients' consent to use their information to bill for

surgical and medical procedures he never performed.

        2.    Typographical Error in an Instruction

               José   also    challenges       a    typographical    error     in    the

aggravated      identity      theft    jury    charge.        The   district     court

instructed the jury that the first element of aggravated identity

theft was "that the defendants committed the crime of health care

fraud    as    set    forth   in   jury      instruction      number   11."         This

instruction should have cross-referenced jury instruction number

12, listing the elements of health-care fraud, and not jury

instruction number 11, which addressed vicarious liability for the

acts and declarations of co-conspirators.                   There was no objection

to this slip-up, and José concedes that review is for plain error

only.        The mistake here falls far short of the "exceedingly

difficult to satisfy" plain error standard for jury instructions.


                                           - 24 -
United States v. Gonzalez-Velez, 466 F.3d 27, 35 (1st Cir. 2006).

The district court's instruction correctly indicated that the

predicate offense was health-care fraud, and it would have been

obvious to the jury that the crime of health-care fraud was "set

forth" in the instruction labeled as such, and not in the plainly

inapplicable instruction titled "Acts and Declarations of Co-

conspirators."     Moreover, given the weight and nature of the

evidence against José, we doubt any confusion engendered by the

typographical error contributed to the jury's verdict.

     3.   Success of the Conspiracy

          José next challenges the district court's refusal to

instruct the jury that the government needed to prove the success

of the conspiracy.    This refusal, José contends, resulted in both

a   constructive    amendment   and    prejudicial   variance.   José

acknowledges that the government ordinarily does not need to prove

the success of a conspiracy.    See United States v. Paret-Ruiz, 567

F.3d 1, 6 (1st Cir. 2009).            According to José, though, the

government committed itself to proving success by charging in the

indictment that the object of the conspiracy was for the defendants

to "enrich themselves."19

          No     constructive   amendment    occurred   here.    "[A]

constructive amendment occurs where the crime charged has been


     19The "Object of the Conspiracy" section of the superseding
indictment's conspiracy count read in relevant part: "The object

                                - 25 -
altered, either literally or in effect, after the grand jury last

passed upon it."        United States v. Mubayyid, 658 F.3d 35, 49 (1st

Cir. 2011) (internal quotation marks omitted). There was no change

to the statutory elements of the offense.                See id. at 51 ("[O]ur

practice has been to look to statutory elements in response to

claims     by    defendants     that      'the   crime     charged'   has      been

changed.").20

            Nor was there any variance between the charged crime and

evidence at trial, let alone a variance that was prejudicial.                  See

id. at 48 ("A variance occurs when the facts proved at trial differ

materially from those alleged in the indictment without altering

the crime charged.").           While there was no evidence that Carlos

made even a penny as a result of José's fraud, the government

established      that    José   himself    billed   Medicare    for   more     than

$3,500,000, and that Medicare paid him hundreds of thousands of

dollars.        José    implausibly    responds     that   those   sums   do   not

necessarily show enrichment without evidence of his "costs or




of the conspiracy was that defendants . . . would unlawfully enrich
themselves by submitting false and fraudulent claims to Medicare
. . . ."
     20 José's reliance on United States v. Narog, 372 F.3d 1243
(11th Cir. 2004), is beside the point. This case does not present
a situation "where the government's failure to prove the crime as
it was charged in the indictment opens the possibility that the
jury convicted on the basis of conduct that was never charged."
Mubayyid, 658 F.3d at 53 n.24 (emphasis omitted) (distinguishing
Narog).


                                       - 26 -
overhead."     We think a jury could infer that José's costs were

low, and certainly less than the amounts he received, given that

he did not actually perform the procedures for which he billed

Medicare.21

                            IV.   Conclusion

             We vacate Carlos's convictions on all counts for lack of

sufficient evidence, and remand for entry of judgment of acquittal.

Finding no error with respect to José, we affirm his convictions.




     21We also reject José's last-ditch claim of cumulative error.
Whatever errors that occurred with respect to José were at worst
minor, and the evidence against him was overwhelming. See United
States v. Sepulveda, 15 F.3d 1161, 1196 (1st Cir. 1993).


                                  - 27 -
