                          RECOMMENDED FOR FULL-TEXT PUBLICATION
                              Pursuant to Sixth Circuit I.O.P. 32.1(b)
                                     File Name: 19a0004p.06

                    UNITED STATES COURT OF APPEALS
                                 FOR THE SIXTH CIRCUIT



 UNITED STATES OF AMERICA,                               ┐
                                   Plaintiff-Appellee,   │
                                                         │
                                                         >      No. 18-5216
        v.                                               │
                                                         │
                                                         │
 ANDREW BLAKE MOOREHEAD,                                 │
                                Defendant-Appellant.     │
                                                         ┘

                          Appeal from the United States District Court
                        for the Western District of Tennessee at Jackson.
                   No. 1:15-cr-10077-1—S. Thomas Anderson, District Judge.

                                 Argued: December 6, 2018

                             Decided and Filed: January 9, 2019

             Before: COLE, Chief Judge; GRIFFIN and KETHLEDGE, Circuit Judges.
                                     _________________

                                         COUNSEL

ARGUED: M. Dianne Smothers, FEDERAL PUBLIC DEFENDER, Memphis, Tennessee, for
Appellant. Debra L. Ireland, UNITED STATES ATTORNEY’S OFFICE, Memphis, Tennessee,
for Appellee. ON BRIEF: M. Dianne Smothers, FEDERAL PUBLIC DEFENDER, Memphis,
Tennessee, for Appellant. Debra L. Ireland, UNITED STATES ATTORNEY’S OFFICE,
Memphis, Tennessee, for Appellee.
                                     _________________

                                          OPINION
                                     _________________

       COLE, Chief Judge. This case is one of many that have arisen from the government’s
investigation into a child pornography website known as “Playpen.” Andrew Moorehead was
indicted for possession and receipt of child pornography based on his activity on the website.
 No. 18-5216                         United States v. Moorehead                           Page 2


He moved to suppress the evidence against him, arguing that it was obtained as a result of an
invalid warrant. The district court denied his motion, and Moorehead now appeals. Because the
good-faith exception to the exclusionary rule applies, we affirm.

                                                I.

       In December 2014, a foreign law enforcement agency informed the FBI of its suspicion
that an IP address in the United States was associated with Playpen. After accessing Playpen and
verifying the nature of its contents, the FBI obtained and executed a search warrant at
Centrilogic, a server hosting company in North Carolina that owned the IP address. The FBI
seized the server that was assigned the relevant IP address and confirmed that it contained a copy
of Playpen. The agents relocated a copy of the server to a government facility in Newington,
Virginia.   Because of a server misconfiguration, the government was able to identify the
administrator of Playpen and gain administrative control of the website. For approximately two
weeks, the FBI continued to operate Playpen from a government-controlled computer server at
its facility in Newington.

       Even with administrative control, however, the government was unable to identify the
individuals who logged into Playpen because the website operates on the Onion Router
(“Tor”)—an anonymity network that masks computer users’ IP addresses. Ordinarily, when the
government seizes control of an illicit website, law enforcement officers can access the website’s
IP log—which records the IP addresses that have accessed the website—and use the log to locate
and apprehend the website’s users. But because Playpen was operating on Tor, the IP addresses
of the users were hidden, and traditional investigative techniques were unavailable.

       To combat the problem of user anonymity, the FBI turned to counter-technology called
the Network Investigative Technique (“NIT”). The NIT works as follows:

   •   When a user logs into Playpen by entering a username and password, the NIT is
       downloaded on the user’s computer.
   •   Once downloaded, the NIT obtains the following information from the user’s
       computer: (1) the IP address; (2) a unique identifier that distinguishes the data
       from that of other computers; (3) the type of operating system; (4) information
       regarding whether the NIT has already been delivered to that computer; (5) the
 No. 18-5216                        United States v. Moorehead                            Page 3


       Host Name; (6) an active operating system username; and (7) a Media Access
       Control address.
   •   That information is then sent to a computer controlled by the government in
       Newington.

       The government sought a warrant in the Eastern District of Virginia authorizing use of
the NIT. Specifically, the warrant sought to “cause an activating computer – wherever located –
to send [identifying information] to a computer controlled by or known to the government.”
(Mot. Suppress, Ex. 3, R. 45-3, PageID 452) (emphasis added.) The affidavit in support of the
warrant described the large number of Playpen users: “[O]ver 1,500 unique users visit[] the
website daily and over 11,000 unique users visit[] the website over the course of a week.” (Id. at
PageID 441.) On February 20, 2015, a magistrate judge in the Eastern District of Virginia
signed a warrant authorizing the government to deploy the NIT on “any user or administrator
who logs into [Playpen] by entering a username and password” (the “NIT Warrant”). (Id. at
PageID 421–422.)

       Between March 1, 2015 and March 5, 2015, a user named “logidragon321” logged into
Playpen for a little over three and a half hours. On March 2, 2015, while “logidragon321” was
logged into Playpen, law enforcement personnel deployed the NIT and identified the IP address
associated with the username.      An administrative subpoena was sent to Jackson Energy
Authority, the Internet Service Provider that operated the IP address. The subpoena response
indicated that Rebecca Moorehead was paying for the Internet service at a residence in
Tennessee, and an open source database revealed that she and Andrew Moorehead were the
occupants of the residence.

       On September 22, 2015, the government obtained a residential warrant for the
Moorehead property, and officers executed the warrant on September 24, 2015, seizing Andrew
Moorehead’s computer equipment. During the execution of the search warrant, Moorehead
admitted that he used the Internet to view child pornography and that “logidragon321” was his
user name.

       Moorehead was indicted by a federal grand jury for one count of possession of child
pornography in violation of 18 U.S.C. § 2252(a)(4)(B) and one count of receipt of child
 No. 18-5216                          United States v. Moorehead                           Page 4


pornography in violation of 18 U.S.C. § 2252(a)(2). He filed a motion to suppress the evidence
obtained from the government’s use of the NIT, arguing that the NIT Warrant violated Federal
Rule of Criminal Procedure 41 and 28 U.S.C. § 636(a) because it was executed outside of the
magistrate judge’s territorial jurisdiction. On June 6, 2017, the district court denied Moorehead’s
motion to suppress.

       Subsequently, Moorehead pleaded guilty to receipt of child pornography and the
government agreed to dismiss the possession charge. The plea agreement reserved Moorehead’s
right to appeal the denial of his motion to suppress.

       On February 27, 2018, Moorehead was sentenced to 97 months’ imprisonment.
Moorehead filed a timely notice of appeal the following day.

                                                 II.

       On appeal from the denial of a motion to suppress, “we review the district court’s
findings of fact for clear error and its conclusions of law de novo.” United States v. Buford,
632 F.3d 264, 268 (6th Cir. 2011) (citation omitted). The evidence is reviewed “in the light most
likely to support the district court’s decision.” United States v. Powell, 847 F.3d 760, 767 (6th
Cir. 2017), cert. denied, 138 S. Ct. 143 (2017) (citations omitted). “[A] denial of a motion to
suppress will be affirmed on appeal if the district court’s conclusion can be justified for any
reason.” United States v. Pasquarille, 20 F.3d 682, 685 (6th Cir. 1994).

       Moorehead first argues that the magistrate judge violated Federal Rule of Criminal
Procedure 41(b) by signing the NIT Warrant. That rule gives a magistrate judge authority to
issue warrants for people or property located within her district. In 2015, when the magistrate
judge issued the NIT Warrant, Rule 41(b) provided four exceptions to the requirement that a
search warrant be issued within a magistrate judge’s district. Relevant here is the exception for
“tracking devices”: the government contends the NIT is analogous to a tracking device and thus
argues that the warrant was authorized at the time it was issued. See Fed. R. Crim. P. 41(b)(4).
After the warrant was issued, Rule 41(b) was amended to add an additional exception to a
magistrate judge’s territorial limitations, one that indisputably authorizes warrants like the NIT
Warrant. But Moorehead contends that no exceptions authorized the NIT Warrant in 2015,
 No. 18-5216                         United States v. Moorehead                            Page 5


arguing (persuasively) that the NIT is not a tracking device. He thus contends that the magistrate
judge violated Rule 41, rending the warrant invalid. He further contends that such violation is of
constitutional magnitude and that the NIT Warrant is void ab initio. But we need not decide
these issues. We conclude that even if the NIT Warrant runs afoul of the Fourth Amendment,
the good-faith exception to the exclusionary rule applies to preclude suppression.

       Suppression is not an automatic consequence of a Fourth Amendment violation. Indeed,
the Fourth Amendment “says nothing about suppressing evidence obtained in violation of [its]
command.” Davis v. United States, 564 U.S. 229, 236 (2011). Nonetheless, the Supreme Court
created the exclusionary rule—a prudential doctrine which prohibits “evidence obtained in
violation of the Fourth Amendment [from] be[ing] used in a criminal proceeding against the
victim of the illegal search and seizure.” United States v. Calandra, 414 U.S. 338, 347 (1974).
Exclusion of evidence under the rule “is not a personal constitutional right” nor is it “calculated
to redress the injury to the privacy of the victim of the search.” Stone v. Powell, 428 U.S. 465,
486 (1976). Rather, the rule is “designed to safeguard Fourth Amendment rights generally
through its deterrent effect.” Calandra, 414 U.S. at 348. As the Supreme Court has “repeatedly
held,” the rule’s “sole purpose . . . is to deter future Fourth Amendment violations.” Davis,
564 U.S. at 236–37 (citing Herring v. United States, 555 U.S. 135, 141, and n.2 (2009); United
States v. Leon, 468 U.S. 897, 909, 921 n.22 (1984); Elkins v. United States, 364 U.S. 206, 217
(1960)). Thus, “[t]he fact that a Fourth Amendment violation occurred . . . does not necessarily
mean that the exclusionary rule applies.” Herring, 555 U.S. at 140.

       Instead, courts must ask whether “the deterrence benefits of suppression . . . outweigh its
heavy costs.” Davis, 564 U.S. at 237; see also Buford, 632 F.3d at 270 (“[T]he Court has made
clear that the benefits of deterrence must outweigh the costs in order to warrant the exclusion of
evidence obtained in violation of the Fourth Amendment.”) (citations omitted).             “Where
suppression fails to yield appreciable deterrence, exclusion is clearly unwarranted.” Davis,
564 U.S. at 237 (citations and brackets omitted). In the deterrence analysis, courts must consider
the culpability of the law enforcement conduct at issue:

       [T]he deterrence benefits of exclusion vary with the culpability of the law
       enforcement conduct at issue. When the police exhibit deliberate, reckless, or
       grossly negligent disregard for Fourth Amendment rights, the deterrent value of
 No. 18-5216                          United States v. Moorehead                           Page 6


       exclusion is strong and tends to outweigh the resulting costs. But when the police
       act with an objectively reasonable good-faith belief that their conduct is lawful, or
       when their conduct involves only simple, isolated negligence, the deterrence
       rationale loses much of its force and exclusion cannot pay its way.

Id. at 238 (citations and brackets omitted).

       The Supreme Court thus has created a “good-faith” exception to the exclusionary rule:
the introduction of evidence obtained in violation of the Fourth Amendment is permitted in
criminal trials when the evidence is “obtained in the reasonable good-faith belief that a search or
seizure was in accord with the Fourth Amendment.” Leon, 468 U.S. at 909 (citations omitted);
see also Herring, 555 U.S. at 142 (“We (perhaps confusingly) call[] . . . objectively reasonable
reliance ‘good faith.’”).    “Following Leon, courts presented with a motion to suppress
[challenging a warrant] must ask whether a reasonably well trained officer would have known
that the search was illegal despite the magistrate’s decision.” United States v. White, 874 F.3d
490, 496 (6th Cir. 2017) (citations omitted). Leon delineated at least four instances in which a
well-trained officer would have known a search was illegal, thus barring application of the good-
faith exception:

       [1] [I]f the magistrate . . . was misled by information in an affidavit that the
       affiant knew was false or would have known was false except for his reckless
       disregard of the truth . . . [2] where the issuing magistrate wholly abandoned [her]
       judicial role . . . [3] [where] a warrant [is] based on an affidavit so lacking in
       indicia of probable cause as to render official belief in its existence entirely
       unreasonable . . . [and [4] where] a warrant [is] so facially deficient—i.e., in
       failing to particularize the place to be searched or the things to be seized—that the
       executing officers cannot reasonably presume it to be valid.

468 U.S. at 923. In “most . . . cases,” however, when an officer “obtained a search warrant from
a judge or magistrate and acted within its scope,” the good-faith exception applies. Id. at 920–
21; see also United States v. Fisher, 745 F.3d 200, 203 (6th Cir. 2014) (“Exclusion has always
been our last resort, not our first impulse.”) (emphasis in original) (citations and brackets
omitted).

       Moorehead argues that his case is unlike most because, he says, the NIT Warrant was
void from the beginning and therefore had no legal effect. He contends that the good-faith
 No. 18-5216                          United States v. Moorehead                          Page 7


exception is categorically inapplicable to warrants that are void ab initio as a result of a
jurisdictional defect. We disagree.

       The good-faith exception is not concerned with whether a valid warrant exists, but
instead asks whether a reasonably well-trained officer would have known that a search was
illegal. See White, 874 F.3d at 496. The Supreme Court has made this clear time and time again,
applying the good-faith exception in a variety of contexts, including in cases where a warrant did
not exist at the time of a search. For instance, in Arizona v. Evans, the Court found that the
good-faith exception applied when officers executed a search based on a warrant that was
quashed seventeen days prior to the defendant’s arrest. 514 U.S. 1, 4, 6 (1995). Similarly, in
Herring, the Supreme Court applied the exception when an officer executed a warrant that had
previously been recalled. 555 U.S. at 137–39. We see no difference between a warrant that does
not exist at the time of a defendant’s arrest, like the warrants in Evans and Herring, and a
warrant that is void ab initio because of a jurisdictional defect.

       Indeed, we relied on Herring in holding that the good-faith exception applies when a
state judge issues a warrant outside of her territorial jurisdiction. See United States v. Master,
614 F.3d 236, 243 (6th Cir. 2010). In Master, a state court judge in Franklin County, Tennessee
issued a warrant for property that was actually located in Coffee County, Tennessee. Id. at 238.
Under Tennessee law, judges do not have jurisdiction to authorize a warrant for a search in a
different county. Id. at 239. After concluding that the warrant was void ab initio and violated
the Fourth Amendment, we considered whether the good-faith exception was foreclosed in light
of the determination that the judge had no authority to issue the warrant. Id. at 239–41. We
found that it was not. Id. at 242–43. In doing so, we rejected a broad interpretation of our
decision in United States v. Scott, 260 F.3d 512, 515 (6th Cir. 2001) where we held that the
good-faith exception did not apply to a warrant signed by a person lacking the requisite legal
authority. We explained:

       Th[e] language [in Herring] is contrary to a foundational assumption of the
       opinion in Scott that: “Subject to a few exceptions, the exclusionary rule requires
       the suppression of evidence obtained in violation of the Fourth Amendment.”
       Scott, 260 F.3d at 514. Whereas Scott effectively required the government to
       qualify for an exception to the general rule of suppression, the Supreme Court has
       since emphasized that the decision to exclude evidence is divorced from whether
 No. 18-5216                         United States v. Moorehead                           Page 8


        a Fourth Amendment violation occurred. See Herring, [555 U.S. at 140]. The
        exclusionary rule’s purpose is instead “to deter deliberate, reckless, or grossly
        negligent conduct, or in some circumstances recurring or systemic negligence.”
        [Id. at 144]. Furthermore, the Court noted that the “exclusionary rule was crafted
        to curb police rather than judicial misconduct.” Id. at [142]. Arguably, the
        issuing magistrate’s lack of authority has no impact on police misconduct, if the
        officers mistakenly, but inadvertently, presented the warrant to an incorrect
        magistrate.

Master, 614 F.3d at 242. We therefore found that Herring required us to conclude that the good-
faith exception is not foreclosed when a warrant is issued outside of a state court judge’s
jurisdiction. Id. at 243.

        For the same reasons articulated in Master, we conclude that the good-faith exception is
not categorically inapplicable to warrants found to be void ab initio. The difference between a
state court judge acting without authority and a federal magistrate judge acting without authority
is of little significance—in both instances, the individual who signed the warrant (arguably) had
no power to do so. Master’s holding that the good-faith exception applies to one applies with
equal force to the other. Accordingly, the good-faith exception to the exclusionary rule is not
categorically inapplicable to warrants that are void ab initio because of a magistrate judge’s
jurisdictional error. Our decision is in accord with the seven other circuits to have decided this
very issue, many of whom relied on our decision in Master. See United States v. Levin, 874 F.3d
316, 318 (1st Cir. 2017); United States v. Werdene, 883 F.3d 204, 216–17 (3d Cir. 2018), cert.
denied, 139 S. Ct. 260 (2018); United States v. McLamb, 880 F.3d 685, 691 (4th Cir. 2018);
United States v. Kienast, 907 F.3d 522, 527–28 (7th Cir. 2018); United States v. Horton,
863 F.3d 1041, 1051 (8th Cir. 2017), cert. denied, 138 S. Ct. 1440 (2018); United States v.
Henderson, 906 F.3d 1109, 1118 (9th Cir. 2018); United States v. Workman, 863 F.3d 1313,
1317 (10th Cir. 2017).

        Having determined that the good-faith exception applies to warrants that are void ab
initio, only one question remains: Does the good-faith exception apply here so as to preclude
suppression? We conclude that it does.

        Moorehead challenges the district court’s application of the Herring balancing test,
arguing first that the district court incorrectly reasoned that the amendment to Rule 41(b) makes
 No. 18-5216                         United States v. Moorehead                            Page 9


deterrence unnecessary. But the district court was correct. While it is certainly arguable that the
magistrate judge did not have authority to sign the NIT Warrant under the version of Rule 41(b)
in effect in 2015, it is undisputed that the 2016 amendment to Rule 41 specifically authorizes
warrants like the NIT Warrant.        The amendment, effective December 1, 2016, gives “a
magistrate judge with authority in any district where activities related to a crime may have
occurred” the authority to “issue a warrant to use remote access to search electronic storage
media and to seize or copy electronically stored information located within or outside that district
if . . . the district where the media or information is located has been concealed through
technological means.” Fed. R. Crim. P. 41(b)(6).

        The parties do not dispute that the NIT Warrant is explicitly authorized by this new
exception. Moorehead only argues that the NIT Warrant itself could still be used to prosecute
hundreds, if not thousands, more defendants. But the Herring analysis requires us to look at
whether suppression would “deter[] Fourth Amendment violations in the future.” 555 U.S. at
141 (emphasis added). Because magistrate judges now have the authority to issue warrants like
the NIT Warrant, suppressing evidence in this case would not result in appreciable deterrence in
the future.

        Moorehead next contends that no reasonable officer could have believed in good faith
that the NIT Warrant was valid. He does not make any credible argument that any of the four
circumstances enumerated in Leon apply. Instead, he argues that the officers must have known
that the NIT Warrant was not authorized under Rule 41 at the time they obtained it because of a
memorandum addressed to the Committee on Rules of Practice and Procedure, dated May 5,
2014, that proposed the amendment that ultimately became Rule 41(b)(6). Moorehead argues
that the proposal, which had its origins from a letter from the Acting Assistant Attorney General,
shows that the government, including high-level officials, knew that the current version of Rule
41(b) did not authorize the NIT Warrant. He also points out that the officers obtained a general
“Search and Seizure Warrant,” rather than the specialized “Tracking Warrant,” that they
presumably would have sought if they believed that Rule 41(b)(4) authorized the warrant.
 No. 18-5216                         United States v. Moorehead                        Page 10


       But reasonable jurists have come to different conclusions about whether the NIT Warrant
was valid. Compare United States v. Austin, 230 F. Supp. 3d 828, 833 (M.D. Tenn. 2017)
(finding the NIT Warrant does not violate Rule 41(b) because it is the equivalent of a “tracking
device” and therefore falls under the ambit of Rule 41(b)(4)), with United States v. Croghan,
209 F. Supp. 3d 1080, 1089 (S.D. Iowa 2016) (concluding that the magistrate judge lacked
authority to issue the NIT Warrant), overruled on other grounds by Horton, 863 F.3d at 1052.
We cannot, therefore, expect officers to have known that this type of warrant was invalid at the
time it was sought. See Workman, 863 F.3d at 1321 (“[I]f a violation took place, it has escaped
the notice of eight federal judges who have held that the same warrant complied with federal law
and the federal rules even though data was being extracted from computers outside the Eastern
District of Virginia. . . . [E]xecuting agents could reasonably have made the same mistake and
reasonably relied on the magistrate judge’s decision to issue the warrant.”).

       Indeed, the magistrate judge who issued the NIT Warrant concluded (whether correctly
or not) that she had jurisdiction. The Supreme Court’s precedent on the exclusionary rule is
clear: suppression must deter “police rather than judicial misconduct.” Master, 614 F.3d at 242
(citing Herring, 55 U.S. at 142); see also Massachusetts v. Sheppard, 468 U.S. 981, 990 (1984)
(“The exclusionary rule was adopted to deter unlawful searches by police, not to punish the
errors of magistrates and judges.”) (citations omitted); Davis, 564 U.S. at 246 (“[W]e have said
time and again that the sole purpose of the exclusionary rule is to deter misconduct by law
enforcement.”) (emphasis in original). The fact that any jurisdictional error here was made by
the magistrate, coupled with the fact that Rule 41(b) has been amended to authorize warrants like
the one at issue, means “the benefits of deterrence” cannot “outweigh the costs.” Master,
614 F.3d at 243 (citing Herring, 55 U.S. at 141).

       Moorehead contends that the good-faith exception has swallowed the exclusionary rule.
But Supreme Court precedent dictates that the good-faith exception applies here. All seven
appellate courts to have considered the issue—on facts Moorehead concedes are virtually
identical to his case—have come to the same conclusion. Levin, 874 F.3d at 324; Werdene,
883 F.3d at 218; McLamb, 880 F.3d at 690; Kienast, 907 F.3d at 528, Horton, 863 F.3d at 1051;
Henderson, 906 F.3d at 1120; Workman, 863 F.3d at 1321. We now join them.
No. 18-5216                       United States v. Moorehead   Page 11


                                             III.

     We affirm the judgment of the district court.
