United States v. Henry Williams ( 2016 )


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  •  United States Court of Appeals
    FOR THE DISTRICT OF COLUMBIA CIRCUIT
    Argued March 11, 2016                   Decided July 8, 2016
    No. 13-3019
    UNITED STATES OF AMERICA,
    APPELLEE
    v.
    HENRY BRANDON WILLIAMS,
    APPELLANT
    Consolidated with 13-3035, 14-3012
    Appeals from the United States District Court
    for the District of Columbia
    (No. 1:11-cr-00129-11)
    (No. 1:11-cr-00129-2)
    (No. 1:11-cr-00129-1)
    Stephen C. Leckar, Edward C. Sussman, and Julian S.
    Greenspun, all appointed by the court, argued the causes and
    filed the joint briefs for appellants.
    Nicholas P. Coleman, Assistant U.S. Attorney, argued
    the cause for appellee. With him on the brief were Elizabeth
    Trosman and Zia Faruqui, Assistant U.S. Attorneys.
    2
    Elizabeth H. Danello, Assistant U.S. Attorney, entered an
    appearance.
    Before: ROGERS, PILLARD and WILKINS, Circuit
    Judges.
    TABLE OF CONTENTS
    Introduction ............................................................................. 2
    I.    Facts and Prior Proceedings............................................. 4
    II. Wiretap Issues ................................................................ 13
    III. Lay Opinion Testimony ................................................. 32
    IV. Wired Plea Agreement ................................................... 50
    V. Acquitted Conduct in Sentencing .................................. 53
    Conclusion ............................................................................ 54
    Introduction
    PER CURIAM: Henry Williams, Gezo Edwards, and
    William Bowman appeal their convictions by a jury of
    participation in a cocaine distribution scheme between
    January 2009 and April 2011. Following a multiyear
    investigation conducted by the Federal Bureau of
    Investigation (“FBI”) and local police, Appellants and eleven
    other individuals were indicted on various federal drug
    offenses. Williams, Edwards, and Bowman were indicted for
    conspiracy to distribute and possess with intent to distribute
    cocaine. Bowman and Edwards also were indicted for
    multiple counts of using, carrying, and possessing a firearm
    3
    during a drug trafficking offense. And Bowman was indicted
    for several counts of distribution of cocaine. Of the fourteen
    individuals named in the original indictment, only Williams,
    Edwards, and Bowman went to trial. The jury found all three
    Appellants guilty of drug conspiracy, found Bowman guilty
    of two firearms possession charges and three cocaine
    distribution charges, and acquitted Edwards of the firearms
    charges. Williams was sentenced to fifty-one months in
    prison, Bowman to forty-five years in prison, and Edwards to
    life imprisonment.
    Appellants challenge their convictions on multiple
    grounds:
    (1) They contend that a series of wiretaps used by the
    Government to uncover the criminal scheme at issue
    here were attained improperly, in violation of both the
    Fourth Amendment and relevant statutes, and that the
    district court erred in refusing to suppress all
    evidence gained from those wiretaps.
    (2) Williams contends that the district court erred in
    admitting portions of the lay opinion testimony
    provided by FBI Special Agent John Bevington, who
    was involved in the underlying investigation.
    (3) Williams argues that the district court improperly
    denied his motion for a judgment of acquittal,
    because there was insufficient evidence to support his
    conviction.
    (4) Williams challenges the district court’s denial of
    requests to instruct the jury on multiple conspiracies
    and to give a limiting instruction concerning
    Bowman’s and Edwards’s bad acts.
    4
    (5) Williams also contends that the district court erred in
    denying his motion to sever his trial from that of
    Bowman and Edwards.
    (6) Bowman contends that the Government violated his
    Fifth Amendment due process rights by improperly
    “wiring” his plea agreement to a plea by Williams.
    (7) Edwards contends that the district court violated his
    Fifth and Sixth Amendment rights by increasing his
    sentence based on his possession of a firearm even
    though the jury had acquitted him of that conduct.
    We affirm the judgments of conviction, with one
    exception. We hold that the district court erred in admitting
    portions of Agent Bevington’s lay opinion testimony and that
    this error was not harmless. Therefore, we reverse Williams’s
    conviction and remand his case to the district court for further
    proceedings. We do not reach Williams’s other challenges to
    his conviction other than to hold that the district court did not
    err in denying his motion for a judgment of acquittal.
    I. Facts and Prior Proceedings
    A.
    In late 2009, a joint task force of the FBI and the District
    of Columbia Metropolitan Police Department began
    investigating a suspected cocaine distribution operation based
    in Washington, D.C. In an effort to uncover the nature, scope,
    and membership of that operation, investigating agents
    reviewed pen registers of telephone calls, arranged
    undercover drug buys, obtained information from confidential
    sources, and conducted extensive physical surveillance. After
    concluding that traditional methods alone were insufficient to
    investigate the operation, the Government sought, and
    eventually obtained, judicial authorization for wiretaps on
    5
    three separate phone numbers associated with Bowman, who
    the Government suspected was a ringleader of the drug
    trafficking. See United States v. Edwards, 
    889 F. Supp. 2d 1
    ,
    5-6 (D.D.C. 2012).
    The first of those wiretaps, which the Government
    obtained on December 7, 2010, authorized the interception of
    wire communications over Target Telephone 1 (“TT1”). See
    
    id. at 5.
    Just a few weeks later, however, the Government
    terminated that wiretap due to lack of activity on the TT1
    phone line. See 
    id. The Government
    did not seek
    reauthorization of the TT1 wiretap. Instead, it applied for a
    separate wiretap on Target Telephone 2 (“TT2”). See 
    id. at 5-
    6. Special Agent Timothy Pak submitted an affidavit in
    support of the TT2 wiretap, averring that Bowman was
    utilizing the TT2 phone line “to discuss and facilitate drug
    trafficking in the Washington, D.C. area.” Gov’t’s Jan. 13,
    2011, TT2 Wiretap Affidavit (“Jan. 13 TT2 Aff.”) ¶ 7. Agent
    Pak’s affidavit asserted that the TT2 wiretap was necessary
    because the Government’s “[n]ormal investigative
    procedures,” 
    id. ¶ 35
    – including the use of confidential
    sources and undercover officers, physical surveillance, trash
    covers, and pen registers – had failed to reveal the full scope
    and nature of the drug trafficking operation. See 
    id. ¶¶ 35-48.
    On January 13, 2011, the district court authorized the TT2
    wiretap for an initial thirty days. See Edwards, 
    889 F. Supp. 2d
    at 6.
    At the Government’s requests, the district court granted
    three extensions of the TT2 wiretap. See 
    id. The Government
    sought the first extension on February 14, 2011, relying on an
    updated affidavit from Agent Pak. That affidavit emphasized
    that reauthorization of the TT2 wiretap was necessary
    because, even after using the TT2 wiretap for a month
    alongside traditional investigative tools, agents had yet to
    6
    uncover the full scope and membership of the drug trafficking
    operation. See Gov’t’s Feb. 14, 2011, TT2 Wiretap Affidavit
    (“Feb. 14 TT2 Aff.”) ¶¶ 34-55. The district court agreed and
    promptly reauthorized the TT2 wiretap for an additional thirty
    days. See Edwards, 
    889 F. Supp. 2d
    at 6.
    On March 11, 2011, the Government requested another
    extension of the TT2 wiretap. Agent Pak’s March 11, 2011,
    affidavit did not name Edwards – another suspected leader of
    the drug trafficking operation – as a potential target of the
    TT2 wiretap reauthorization. In that affidavit, Agent Pak
    reiterated his belief that the TT2 wiretap remained necessary
    to fill evidentiary gaps left by normal investigative
    procedures. See Gov’t’s March 11, 2011, TT2 Wiretap
    Application (“Mar. 11 TT2 Aff.”) ¶¶ 25-41. The district court
    obliged and, on March 11, 2011, reauthorized the TT2 wiretap
    for another thirty-day period. See Edwards, 
    889 F. Supp. 2d
    at 6.
    The Government then sought and obtained a third and
    final thirty-day reauthorization of the TT2 wiretap on April 8,
    2011, again based on Agent Pak’s view that the TT2 wiretap
    was necessary to investigate the full scope of the drug
    trafficking operation. See id.; Gov’t’s April 8, 2011, TT2
    Wiretap Affidavit (“Apr. 8 TT2 Aff.”) ¶¶ 31-50.
    On March 21, 2011, while the TT2 wiretap was still
    operational on its second extension, the Government sought
    an order authorizing the interception of wire communications
    to and from Target Telephone 3 (“TT3”), another phone
    number associated with Bowman. See Edwards, 
    889 F. Supp. 2d
    at 6. As in his other affidavits, Agent Pak attested that the
    TT3 wiretap was necessary to determine the full nature and
    scope of the conspiracy, which called for further investigation
    notwithstanding the TT2 wiretap. See Gov’t’s Mar. 21, 2011,
    7
    TT3 Wiretap Affidavit (“Mar. 21 TT3 Aff.”) ¶¶ 27-43.
    Notably, the Government’s TT3 wiretap application was the
    first to name Edwards as a possible target of the wiretap. See
    
    id. ¶ 10(c).
    The district court authorized the TT3 wiretap,
    and, on April 15, 2011, reauthorized it for an additional thirty
    days. See Edwards, 
    889 F. Supp. 2d
    at 6.
    Between January and April 2011, investigating agents
    employed the TT2 and TT3 wiretaps to intercept numerous
    telephone calls between Bowman, Edwards, Williams, and
    several other members of the suspected drug trafficking
    operation. Toward the end of the investigation, agents
    executed search warrants on a storage unit and various
    residences connected to Bowman and Edwards and seized
    cocaine, drug paraphernalia, several firearms, and
    ammunition.
    B.
    The Government arrested Williams, Edwards, and
    Bowman along with several other individuals and indicted
    them for various drug-related offenses. The operative
    superseding indictment charged Williams, Edwards, Bowman,
    and several other men with conspiracy to distribute and
    possess with intent to distribute five kilograms or more of
    cocaine, in violation of 21 U.S.C. § 846. The superseding
    indictment also charged Bowman and Edwards with two
    counts of using, carrying, and possessing a firearm during a
    drug trafficking offense, in violation of 18 U.S.C.
    § 924(c)(1).1 It charged Bowman with an additional count of
    firearm possession and three counts of unlawful distribution
    1
    Those two firearm possession counts were later merged into one
    before the case was submitted to the jury.
    8
    of cocaine, in violation of 21 U.S.C. §§ 841(a)(1) and
    841(b)(1)(C).2
    Appellants filed several pretrial motions during the early
    stages of the case. Williams moved to sever his trial from that
    of his co-defendants. Williams insisted that trying him
    alongside co-defendants facing much more serious charges
    would risk prejudicial spillover and allow the prosecution to
    benefit from guilt by association. The district court denied
    that motion, concluding that Williams failed to show a serious
    risk that a joint trial would prevent the jury from making a
    reliable judgment about his guilt or innocence. Around the
    same time, Bowman and Edwards moved to suppress
    evidence obtained from the TT2 and TT3 wiretaps on the
    ground that, in obtaining judicial approval of the wiretaps, the
    Government failed to satisfy the requirements of the Fourth
    Amendment and Title III of the Omnibus Crime Control and
    Safe Streets Act of 1968 (“Title III”), 18 U.S.C. § 2510 et seq.
    See Edwards, 
    889 F. Supp. 2d
    at 4-5.3 The district court
    denied those suppression motions. 
    Id. at 18.
    It held that the
    TT2 and TT3 wiretaps, and all subsequent reauthorizations,
    satisfied Title III’s “necessity” requirement because
    traditional investigative techniques were insufficient to reveal
    the full scope of the suspected drug trafficking operation. 
    Id. at 8-13.
    The district court further concluded that Appellants
    were not entitled to a hearing under Franks v. Delaware, 
    438 U.S. 154
    (1978), because they failed to make a substantial
    showing that the purported omissions in the Government’s
    2
    The superseding indictment also charged Bowman with two
    counts of unlawful distribution of five grams or more of cocaine
    base, in violation of 21 U.S.C. §§ 841(a)(1) and 841(b)(1)(B)(iii),
    but the Government later dismissed those counts.
    3
    Williams filed a notice to adopt those motions.
    9
    wiretap applications were material. Edwards, 
    889 F. Supp. 2d
    at 14-18. Edwards filed more motions, some counseled and
    some pro se, reiterating his earlier claims and also arguing
    that agents violated Title III’s “naming” and “prior
    applications” provisions. The district court denied each of
    those motions in a series of written memoranda and orders.
    See, e.g., Edwards, 
    889 F. Supp. 2d
    at 18-23 (D.D.C. Sept.
    16, 2012) (denying pre-trial motion for reconsideration); 
    id. at 23-29
    (D.D.C. Oct. 23, 2012) (same); United States v.
    Edwards, 
    904 F. Supp. 2d 7
    , 9-11 (D.D.C. 2012) (denying pro
    se motion for reconsideration); United States v. Edwards, 
    943 F. Supp. 2d 125
    , 127-29 (D.D.C. 2013) (denying pro se
    motion for new trial and other post-trial motions); United
    States v. Edwards, 
    994 F. Supp. 2d 1
    , 4-7 (D.D.C. 2013)
    (denying pro se post-trial motions); United States v. Edwards,
    
    994 F. Supp. 2d 7
    , 9-10 (D.D.C. 2014) (same).
    In the months leading up to trial, Bowman entered into
    plea negotiations. The Government offered Bowman a
    “wired” plea deal. Under the initial version of that deal,
    Bowman could plead guilty, and the Government would
    recommend a prison sentence capped at twenty-three years,
    but only if Williams also pleaded guilty to the drug
    conspiracy charge. If Williams pleaded guilty, he, in turn,
    would face no mandatory minimum and likely would face a
    guidelines sentencing range of twenty-seven to thirty-three
    months imprisonment. Bowman’s counsel told the court that
    Bowman was willing to accept his half of the deal but “would
    hope that [the Government] would unwire it” from the
    condition that Williams also plead guilty. Status Hr’g Tr. 75
    (Sept. 7, 2012). A month later, during jury selection, the
    Government offered a revised plea agreement to Bowman.
    Under that revised agreement, Bowman could plead guilty to
    a sentence of twenty-five years imprisonment, contingent
    upon Williams’s acceptance of a plea offer of a thirty to
    10
    thirty-seven month prison sentence. On the eve of trial,
    Bowman’s counsel notified the district court that his client did
    “not wish to engage in any discussions with the Government
    and does not wish to plead guilty based upon the offer that has
    been made to him.” Trial Tr. 7 (Oct. 22, 2012). Williams, for
    his part, stated on the record that he also would not accept the
    Government’s plea offer.
    C.
    All three Appellants proceeded to trial. During its case-
    in-chief, the Government played audio recordings of phone
    calls obtained from the wiretaps, showed numerous
    surveillance videos, and presented testimony from
    investigating agents, narcotics experts, and cooperating
    witnesses. The Government offered evidence to show that
    Edwards and Bowman were the leaders of a cocaine-
    trafficking network in the Washington, D.C., area. According
    to one of the prosecution’s cooperating witnesses, Edwards
    and Bowman repeatedly acquired large quantities of cocaine
    from California and used cross-country shipping pods to
    transport it to the Washington, D.C., area. The evidence
    suggested that they stored the cocaine in various locations,
    including an apartment in Capitol Heights, Maryland, and
    storage facilities in Hyattsville, Maryland. The Government
    adduced testimony that Edwards processed, weighed, and
    repackaged the cocaine into smaller blocks for resale to mid-
    level drug dealers.       Bowman, in turn, distributed the
    repackaged cocaine to those mid-level dealers, usually on
    consignment. Another cooperating witness testified that
    Bowman typically would give the drugs to him “on
    consignment,” and that he later would pay Bowman back with
    the proceeds earned from selling the drugs to individual
    customers. Trial Tr. 9, 21 (Nov. 5, 2012, p.m. session). The
    prosecution’s evidence, including wiretap recordings and
    surveillance videos, also showed that Williams interacted with
    11
    the other defendants during the early half of 2011. Williams
    repeatedly called Bowman between January and March 2011,
    and met with Bowman on several occasions in mid-March
    2011, including on March 12, March 15, and March 23,
    shortly after Bowman and Edwards, on or before March 10,
    had received a large shipment of cocaine.
    The Government also presented the testimony of FBI
    Special Agent John Bevington, one of the lead investigating
    officers. On the second day of trial, the district court granted
    the Government’s motion to qualify Agent Bevington as an
    expert witness “in the interpretation of words and phrases
    used by drug traffickers in this particular case.” Trial Tr. 67
    (Oct. 24, 2012, a.m. session). In his capacity as an expert on
    narcotics terminology, Agent Bevington translated many
    “coded” words that appeared in conversations between
    Bowman and other members of the alleged drug conspiracy.
    Over defense counsel’s objections, the district court also
    permitted Agent Bevington to provide lay opinion testimony
    interpreting recorded calls between Bowman, Williams, and
    other co-conspirators.
    D.
    At the close of all the evidence, Williams moved for a
    judgment of acquittal, chiefly on the ground that the evidence
    was insufficient to prove his participation in the charged drug
    conspiracy.      Drawing all inferences in favor of the
    prosecution, the district court orally denied the motion and
    found that a reasonable jury could find that Williams
    participated in the alleged conspiracy based on the nature and
    frequency of his contacts with Bowman. See Trial Tr. 96-97
    (Nov. 13, 2012, p.m. session). During the final days of the
    trial, Edwards and Williams asked the district court to give a
    “multiple conspiracies instruction” to the jury, arguing that
    the prosecution’s evidence, at most, established their
    12
    involvement in a different drug conspiracy from the one
    alleged in the superseding indictment. The district court
    rejected that request and declined to give the proposed
    instruction. See generally Final Jury Instructions, United
    States v. Edwards, No. 11-cr-129 (D.D.C.), ECF No. 591.
    After resolving other pending trial motions and hearing the
    parties’ closing statements, the district court instructed the
    jury and then submitted the case to the jury for deliberation.
    On November 16, 2012, the jury began its deliberations
    and delivered verdicts four days later. The jury found
    Bowman, Edwards, and Williams guilty of the drug
    conspiracy charge. On that charge, the jury held Bowman and
    Edwards responsible for five kilograms or more of cocaine
    and held Williams responsible for an amount less than 500
    grams. The jury also found Bowman guilty of two firearm
    possession charges and all three remaining cocaine
    distribution charges. The jury acquitted Edwards on the
    firearm possession charge.
    During Edwards’s sentencing hearing, the district court
    granted the Government’s request for a two-level increase in
    Edwards’s guidelines calculation for possession of a
    dangerous weapon, pursuant to U.S. Sentencing Guideline
    § 2D1.1(b)(1). Even though the jury had acquitted him on the
    firearm possession count, the district court found by a
    preponderance of the evidence that Edwards possessed a
    firearm in furtherance of the drug trafficking conspiracy. The
    district court sentenced Edwards to life imprisonment,
    Williams to fifty-one months in prison for the conspiracy
    charge, and Bowman to an aggregate prison term of forty-five
    years in prison for his offenses. Appellants timely appealed.
    13
    II. Wiretap Issues
    Appellants’ first challenge to their convictions rests on
    their contention that many of the Government’s wiretap
    applications were flawed, requiring the suppression of all
    evidence gained from those wiretaps. They rest that challenge
    on four grounds. First, they argue that the district court erred
    by refusing to hold a hearing, pursuant to Franks v. Delaware,
    
    438 U.S. 154
    , to determine whether the Government omitted
    material information from its wiretap applications. Second,
    they claim that by omitting that information, the Government
    violated the necessity requirement of Title III. Third, they
    argue that the information the Government did disclose was
    insufficient to establish the necessity of the wiretaps. And
    fourth, Edwards asserts that the Government unlawfully failed
    to name him in its March 11, 2011, wiretap affidavit. After
    setting forth the governing legal principles, we address each
    of these contentions in turn.
    A.
    A defendant may seek to suppress the evidence gathered
    as a result of wiretap surveillance under two different legal
    theories: she can argue that the wiretap violated her rights
    under the Fourth Amendment, or that the wiretap failed to
    comply with the requirements of Title III. Appellants argue
    both here.
    1. Appellants’ Fourth Amendment claim is based on the
    Supreme Court’s decision in Franks v. Delaware, 
    438 U.S. 154
    . Franks involved a defendant’s challenge to a warrant
    affidavit that, according to the defendant, contained false
    statements. 
    Id. at 157-58.
    The Court held that “where the
    defendant makes a substantial preliminary showing that a
    false statement knowingly and intentionally, or with reckless
    disregard for the truth, was included by the affiant in the
    14
    warrant affidavit, and if the allegedly false statement is
    necessary to the finding of probable cause, the Fourth
    Amendment requires that a hearing be held at the defendant’s
    request.” 
    Id. at 155-56.
    This court has thereafter referred to
    such hearings as “Franks hearings.” See, e.g., United States
    v. Maynard, 
    615 F.3d 544
    , 550-51 (D.C. Cir. 2010); United
    States v. Becton, 
    601 F.3d 588
    , 594 (D.C. Cir. 2010). To
    obtain a Franks hearing, a movant “must show that (1) the
    affidavit contained false statements; (2) the statements were
    material to the issue of probable cause; and (3) the false
    statements were made knowingly and intentionally, or with
    reckless disregard for the truth.” 
    Becton, 601 F.3d at 594
    (internal quotation marks omitted).
    This court has extended Franks to apply not only where
    the Government is alleged to have made false statements but
    also where a defendant alleges that the Government
    “knowingly and intentionally (or with reckless disregard)
    omitted a fact that would have defeated probable cause.”
    United States v. Glover, 
    681 F.3d 411
    , 419 (D.C. Cir. 2012);
    accord United States v. Spencer, 
    530 F.3d 1003
    , 1007 (D.C.
    Cir. 2008) (stating that “suppression also remains ‘an
    appropriate remedy if the magistrate or judge in issuing a
    warrant was misled by information in an affidavit,’” and
    noting that “[t]his latter exception also has been held to apply
    under certain circumstances to material omissions” (quoting
    United States v. Leon, 
    468 U.S. 897
    , 923 (1984))). Although
    Franks involved a probable cause determination concerning a
    warrant affidavit, this court has applied Franks in the wiretap
    context as well. See, e.g., 
    Maynard, 615 F.3d at 550-51
    ;
    
    Becton, 601 F.3d at 597-98
    .
    Yet not just any omission is enough. This court’s
    precedent is clear that to implicate the Fourth Amendment,
    and to require a Franks hearing, the omission alleged must be
    15
    such that, had the omitted information been provided to the
    authorizing court, it would have altered the court’s conclusion
    that the wiretap was necessary. See, e.g., 
    Becton, 601 F.3d at 597
    (finding “the Government’s failure to disclose certain
    information bearing on the credibility of two confidential
    sources” unproblematic where the inclusion of that additional
    information “was [not] material” and “would not have
    defeat[ed] probable cause” (internal quotation marks
    omitted)). If a defendant makes such a showing, she would
    then be entitled to a hearing before the district court to
    determine whether suppression of that wiretap evidence is
    required under the Fourth Amendment. See 
    Franks, 438 U.S. at 171-72
    . The court has not resolved whether a district
    court’s decision not to hold a Franks hearing is reviewed
    under the clearly erroneous or de novo standard of review.
    See 
    Becton, 601 F.3d at 594
    . It is unnecessary to do so here
    because, under either standard of review, we would find no
    error by the district court.
    2. Appellants also contest the wiretaps at issue here by
    arguing that the Government failed to comply with the
    provisions of Title III in seeking the wiretap.
    To approve a wiretap, a judge must determine that the
    wiretap is supported by both probable cause and necessity. 18
    U.S.C. § 2518(3); 
    Glover, 681 F.3d at 420
    . Appellants do not
    challenge the Government’s probable cause showing,4 but
    4
    To demonstrate probable cause, the Government must show that
    there is probable cause for belief that: (1) “an individual is
    committing, has committed, or is about to commit a particular
    offense”; (2) “particular communications concerning that offense
    will be obtained through such interception”; and (3) “the facilities
    from which . . . the wire . . . communications are to be intercepted
    16
    instead argue that the affidavits the Government submitted to
    support its wiretap applications did not demonstrate that each
    wiretap was necessary.
    To demonstrate that a wiretap is necessary, Title III
    requires the Government to provide “a full and complete
    statement as to whether or not other investigative procedures
    have been tried and have failed or why they reasonably appear
    to be unlikely to succeed if tried or to be too dangerous.” 18
    U.S.C. § 2518(1)(c). The authorizing court must then
    determine that “normal investigative procedures have been
    tried and have failed or reasonably appear to be unlikely to
    succeed if tried or to be too dangerous” on the basis of this
    statement. 
    Id. § 2518(3)(c).
    This necessity requirement is
    satisfied when “traditional investigative techniques have
    proved inadequate to reveal the operation’s full nature and
    scope.” 
    Becton, 601 F.3d at 596
    (internal quotation marks
    omitted). In assessing the necessity of a wiretap application,
    courts must “giv[e] close scrutiny to applications challenged
    for noncompliance and . . . reject[] generalized and
    conclusory statements that other investigative procedures
    would prove unsuccessful.” United States v. Johnson, 
    696 F.2d 115
    , 123 (D.C. Cir. 1982) (quoting United States v.
    Williams, 
    580 F.2d 578
    , 588 (D.C. Cir. 1978)). “Nonetheless,
    the statutory command was not designed to foreclose
    electronic surveillance until every other imaginable method of
    investigation has been unsuccessfully attempted.” 
    Williams, 580 F.2d at 588
    (internal quotation marks omitted). It is
    sufficient for the Government to show that “other techniques
    are impractical under the circumstances and that it would be
    are being used . . . in connection with the commission of such
    offense.” 18 U.S.C. § 2518(3)(a)-(b), (d).
    17
    unreasonable to require pursuit of those avenues of
    investigation.” 
    Id. (internal quotation
    marks omitted).
    An “aggrieved person” may move to suppress the
    contents of any intercepted communication and any evidence
    derived therefrom where “the communication was unlawfully
    intercepted.” 18 U.S.C. § 2518(10)(a)(i). This provision
    “was not intended to reach every failure to follow statutory
    procedures,” but applies where there is a “failure to satisfy
    any of those statutory requirements that directly and
    substantially implement the congressional intention to limit
    the use of intercept procedures.” United States v. Chavez, 
    416 U.S. 562
    , 574-75 (1974) (quoting United States v. Giordano,
    
    416 U.S. 505
    , 527 (1974)). This includes “the statutorily
    imposed preconditions to judicial authorization” of a wiretap,
    such as necessity. United States v. Donovan, 
    429 U.S. 413
    ,
    436 (1977) (citing 18 U.S.C. § 2518(3)(c)); see also United
    States v. Carter, 
    449 F.3d 1287
    , 1292-93 (D.C. Cir. 2006).
    An affidavit offered in support of a wiretap application
    enjoys a “presumption of validity.” 
    Maynard, 615 F.3d at 550
    (quoting 
    Franks, 438 U.S. at 171
    ) (concerning affidavits
    in support of search warrants). The court reviews an
    authorizing court’s necessity determination for abuse of
    discretion, but does not give a second layer of deference to a
    district court’s assessment of the authorizing court’s necessity
    determination. See 
    Glover, 681 F.3d at 419-20
    . In assessing
    a district court’s denial of a wiretap suppression motion, the
    court reviews the district court’s legal conclusions de novo
    and its factual findings for clear error. United States v.
    Eiland, 
    738 F.3d 338
    , 347 (D.C. Cir. 2013).
    B.
    We turn now to Appellants’ arguments seeking to
    suppress the evidence derived from the wiretaps.
    18
    1. Appellants first argue that the district court erred by
    refusing to hold a Franks hearing concerning certain
    omissions from the Government’s wiretap applications.
    Because the omissions were not material, we reject the
    argument.
    Appellants allege, and the Government does not dispute,
    that the Government’s wiretap affidavits did not disclose two
    “investigative procedures,” 18 U.S.C. § 2518(1)(c), related to
    its investigation of Bowman. First, the Government’s initial
    three applications seeking to wiretap Bowman’s TT2 phone
    failed to disclose the existence of a pen register5 on TT3,
    another of Bowman’s phones. See generally Jan. 13 TT2
    Aff.; Feb. 14 TT2 Aff.; Mar. 11 TT2 Aff. The Government
    had been operating the TT3 pen register for nearly a year
    when it first sought to wiretap Bowman’s TT2 phone, and by
    March 2011, when it submitted its third application for a
    wiretap on TT2, the Government had recorded over two
    thousand activations on TT3. See Mar. 21 TT3 Aff. ¶ 23.
    Second, in the March 11 Affidavit, the Government did
    not disclose the existence of an additional confidential source,
    CS-4, who had known Bowman and Edwards for over ten
    years, and who, in late February 2011, informed the
    Government that he or she knew that the two were “working
    in concert to traffic[] in narcotics.” Apr. 8 TT2 Aff. ¶ 35.
    5
    “A pen register is a mechanical device that records the numbers
    dialed on a telephone by monitoring the electrical impulses caused
    when the dial on the telephone is released. It does not overhear oral
    communications and does not indicate whether calls are actually
    completed.” United States v. N.Y. Tel. Co., 
    434 U.S. 159
    , 161 n.1
    (1977).
    19
    Neither of these omissions, however, would have
    “defeat[ed] probable cause,” and therefore, the district court
    was not required to hold a Franks hearing concerning those
    omissions. 
    Becton, 601 F.3d at 597
    (quoting 
    Spencer, 530 F.3d at 1007
    ). While pen registers cannot “convey to the
    government the substance of [Bowman’s] calls,” 
    Eiland, 738 F.3d at 349
    , they can nonetheless reveal relevant and
    important information. And sometimes they uncover data that
    can make a wiretap unnecessary.6 Here, however, Appellants
    have not shown that pen register data rendered the wiretaps
    unnecessary. See 
    Franks, 438 U.S. at 171-72
    .
    The same is true of the Government’s use of CS-4. CS-4
    provided some information to the Government concerning
    Bowman and Edwards’s relationship and participation in drug
    trafficking. But that information was not sufficient to
    6
    See, e.g., Smith v. Maryland, 
    442 U.S. 735
    , 737 (1979) (police
    obtained a search warrant through use of a pen register, where pen
    register demonstrated petitioner was responsible for robbing victim
    in question after victim began receiving threatening phone calls
    from robber subsequent to robbery); United States v. Geraldo, 
    271 F.3d 1112
    , 1115 (D.C. Cir. 2001) (describing pen register data as
    part of the evidence submitted to a magistrate deemed sufficient to
    justify the issuance of a search warrant, without resort to a wiretap);
    United States v. Clay, 
    34 F.3d 1070
    (8th Cir. 1994) (unpublished)
    (pen register data led to arrest of a drug trafficking co-conspirator
    where pen register data linked one co-conspirator to the other);
    United States v. Thornton, 
    746 F.2d 39
    , 41-42 (D.C. Cir. 1984)
    (explaining that pen register data, among other evidence, allowed
    law enforcement to secure – without the use of a wiretap – several
    search warrants concerning an alleged gambling enterprise based on
    the fact that the pen registers showed that numerous calls were
    placed to the location in question “within one hour of the prime
    gambling period”); United States v. Louderman, 
    576 F.2d 1383
    ,
    1386 (9th Cir. 1978) (pen register data used to prove wire fraud).
    20
    establish either the source of Bowman’s drugs, or the
    hierarchy of his organization. Nor was continued reliance on
    CS-4 reasonably likely to reveal that information, which the
    Government needed to uncover fully and prosecute
    effectively the conspiracy at issue here. Had the Government
    disclosed the existence of CS-4, it would not have altered the
    authorizing court’s necessity determination, and therefore, the
    Government’s omission of that information did not require a
    Franks hearing.
    2. Appellants next argue that the Government violated
    Title III’s necessity requirement, 18 U.S.C. § 2518(1)(c), by
    failing to include the omitted information regarding the pen
    register on TT3 and confidential source CS-4. We reject
    Appellants’ contention that the fruits of the resulting wiretaps
    must be suppressed. Although we agree that the Government
    could have, and should have, provided the omitted
    information discussed above in each relevant wiretap
    application, the Government provided the bare minimum
    necessary to comply with Title III.
    The Government has offered no reason why it could not
    have provided the authorizing court with the omitted
    information concerning the pen register on TT3 and the
    existence of CS-4, consistent with the statutory requirement
    of a “full and complete statement.” 
    Id. Both omissions
    were
    relevant to the necessity determination because both shed
    further light on the breadth of the Government’s investigation
    and the alternative means the Government had to investigate
    the conspiracy at issue, short of the invasive option of wiretap
    surveillance.
    Nonetheless, the Government’s failure to include this
    information in its wiretap applications did not violate the
    necessity requirement of Title III. The Government informed
    21
    the authorizing court of the existence of the pen register on
    TT2, see, e.g., Jan. 13 TT2 Aff. ¶¶ 30-34, and further
    explained why, in this particular case, pen register data was
    insufficient to reveal the “full nature and scope” of the
    conspiracy. 
    Becton, 601 F.3d at 597
    ; see also 
    id. (finding that
    “[t]he Government’s omission of information that a previous
    search had yielded incriminating information did not make its
    affidavit infirm”); Jan. 13 TT2 Aff. ¶¶ 47-48 (asserting that
    while pen registers are useful “in establishing relationships
    and patterns of operations, . . . they provide little direct
    evidence as to the significance of the telephone calls”). The
    activations recorded by the pen register on TT3 were no more
    illuminating. Consequently, the inclusion of information
    concerning the pen register on TT3 could not have altered the
    authorizing court’s necessity determination.
    The same is true of the Government’s use of CS-4.
    Appellants have not shown that, had the authorizing court
    known that CS-4 was aiding the Government in its
    investigation, the court would have found necessity lacking
    because the available investigative techniques were sufficient
    to establish the source of Bowman’s drugs or the hierarchy of
    his organization. 
    See supra
    Part II.B.1. This information
    could not have altered the authorizing court’s necessity
    determination, and thus the Government was not required to
    include it in its wiretap application. To this extent, the
    Government’s omission “was not material, because it did not
    undermine the government’s ability to prove the need for the
    . . . wiretap.” 
    Becton, 601 F.3d at 597
    (internal quotation
    marks omitted).
    By omitting the information concerning the pen register
    on TT3 and the Government’s use of CS-4, the Government
    did not provide the authorizing court with as complete a
    picture of its investigation as it could have, making the
    22
    authorizing court’s necessity determination potentially less
    well-informed. Although we conclude that the Government’s
    omissions were not material to Title III’s necessity
    requirement, the Government could have, and should have,
    included this information in its wiretap affidavits. As the
    Supreme Court stated in United States v. Donovan, the “strict
    adherence by the Government to the provisions of Title III
    would . . . be more in keeping with the responsibilities
    Congress has imposed upon it when authority to engage in
    wiretapping or electronic surveillance is 
    sought.” 429 U.S. at 440
    (quoting 
    Chavez, 416 U.S. at 580
    ). Absent some
    persuasive explanation for an omission, we anticipate that the
    Government will provide such information to authorizing
    courts in the future.
    3. Appellants next argue that the information the
    Government did disclose in its wiretap application was
    insufficient to demonstrate the wiretap’s necessity when
    considered in combination with the omission of the pen
    register on TT3 and CS-4. We disagree. We have determined
    already that the Government’s omission of information
    concerning the pen register on TT3 and the existence of CS-4
    did not negate the wiretap’s necessity. Appellants fare no
    better when those omissions are viewed in combination with
    Appellants’ arguments concerning the information that the
    Government did include in its wiretap application.
    Focusing first on the January 13 Affidavit, Appellants
    argue that the wiretap was unnecessary because the
    Government’s surveillance of Bowman was bearing fruit and
    likely would continue to do so, given that “Bowman was
    hardly circumspect” when it came to carrying out his drug
    operations. Appellants’ Br. 27-29. In particular, Appellants
    highlight several instances when the Government was able to
    observe Bowman selling cocaine to undercover operatives
    23
    and others. See Jan. 13 TT2 Aff. ¶¶ 19-20 (describing two
    controlled drug purchases a confidential source made from
    Bowman); Trial Tr. 83-84 (Oct. 25, 2012, p.m. session)
    (testimony of Government agent recounting his surveillance
    of Bowman during a confidential informant’s purchase of
    drugs from Bowman). Appellants’ arguments are unavailing.
    The Government has adequately demonstrated that such
    surveillance and undercover operations were unlikely to
    provide it with the information needed to uncover the “full
    nature and scope” of the suspected crime at issue, United
    States v. Sobamowo, 
    892 F.2d 90
    , 93 (D.C. Cir. 1989)
    (quoting United States v. Brown, 
    823 F.2d 591
    , 598 (D.C. Cir.
    1987)), namely, the source of Bowman’s cocaine, and the
    hierarchy of Bowman’s organization. In Becton, the court
    similarly found necessity where “normal investigative
    procedures ha[d] been probative in proving that an ongoing
    illegal narcotics business [wa]s operating” because “the FBI
    had been unable to determine the identities of other co-
    conspirators who supplied and transported drugs into D.C.
    and who assisted in local redistribution using these 
    methods.” 601 F.3d at 596
    (internal quotation marks omitted).
    Appellants fault the Government for not “squarely
    address[ing]” “how well-placed the informants were, or how
    close they were to Bowman,” Appellants’ Reply Br. 12, but
    the Government persuasively suggests that Bowman was
    unlikely to give his customers information about where he
    kept his drugs, or who was supplying them to him. Had he
    done the former, he would have risked his drugs being stolen.
    Had he done the latter, he would have risked having his
    customers go straight to his drug source. As the district court
    noted, “the fact that Bowman was willing to sell narcotics to
    the undercover officer and confidential sources he barely
    knew does not negate [the Government’s] observation that
    Bowman kept certain information, such as the location of his
    24
    stash house, from his customers.” Edwards, 
    889 F. Supp. 2d
    at 9; see also 
    Eiland, 738 F.3d at 349
    (explaining that the
    placement of informants does not demonstrate lack of
    necessity because those informants were not close enough to
    the core members of the conspiracy to “have access to the
    most closely held secrets”); United States v. Fernandez, No.
    12-cr-445, 
    2013 WL 503966
    , at *2 (S.D.N.Y. Feb. 7, 2013)
    (noting that individuals involved in a drug trade “were
    unlikely to reveal to an informant the source of their drugs or
    the manner in which the narcotics were transported”).
    Nor was the Government required in these circumstances
    to expect that physical surveillance would provide such
    information. The Government notes that there was only so
    much surveilling of Bowman it could do before Bowman
    might catch on to the surveillance. See Jan. 13 TT2 Aff. ¶ 40
    (asserting that “prolonged or regular surveillance of the
    movements of the subjects would most likely be noticed,
    thereby causing them to become more cautious in their illegal
    activities, or to change the manner in which they conduct their
    illegal activity, thus further stalling law enforcement efforts”).
    And while following Bowman’s movements might have given
    the Government some idea of where Bowman kept at least
    some of his drugs, the Government’s submissions to the
    authorizing court established that continued surveillance
    could not be expected to provide it the breadth of
    understanding concerning the location of those drugs, nor the
    certainty that wiretap surveillance in these circumstances
    would likely provide. See United States v. Scurry, 
    821 F.3d 1
    ,
    17-18 (D.C. Cir. 2016) (finding the Government’s use of
    physical surveillance insufficient to defeat necessity where
    the defendant “took evasive maneuvers to avoid physical
    surveillance, [and] consummated drug sales indoors or inside
    cars,” and rejecting the defendant’s argument that “the
    government could have searched [the defendant’s] known
    25
    stash house or prosecuted [the defendant] on the evidence of
    the controlled narcotics transactions alone”).
    Appellants also claim that the disclosed pen register on
    TT2 provided the Government with sufficient information to
    preclude the need for a wiretap. But as discussed above, the
    pen registers at issue here did not reveal, nor was their
    continued use reasonably likely to reveal, sufficient
    information to render the wiretaps unnecessary.
    Accordingly, the authorizing court did not abuse its
    discretion by finding the wiretaps sought by the Government
    here necessary. To the extent that Appellants contest the
    Government’s February 11 Affidavit on the same necessity
    grounds as the January 13 Affidavit, we affirm the necessity
    determination as to the February 11 Affidavit for the same
    reasons.
    4. Appellants’ challenge to the Government’s March 11
    Affidavit focuses on the Government’s failure to name or
    discuss Edwards anywhere in the Affidavit. They assert that
    this omission violated Title III’s “naming” and necessity
    requirements, and thus request the suppression of the fruits of
    the wiretap approved based on that affidavit.
    a. Pursuant to 18 U.S.C. § 2518(1)(b)(iv), the
    Government is required to include information concerning
    “the identity of the person, if known, committing the offense
    and whose communications are to be intercepted.” The
    Supreme Court has interpreted this provision to require the
    identification of an individual if the Government (1) “has
    probable cause to believe that the individual is engaged in the
    criminal activity under investigation” and (2) “expects to
    intercept the individual’s conversations over the target
    telephone.” 
    Donovan, 429 U.S. at 428
    . This naming
    requirement applies to individuals placing calls to the target
    26
    telephone as well as to individuals making calls from the
    target telephone. See 
    id. at 424-28.
    The Supreme Court in
    Donovan held that a violation of § 2518(1)(b)(iv) did not
    constitute grounds for suppression under § 2518(10)(a)(i),
    where the failure to name an individual in the wiretap
    application was not made “knowingly . . . for the purpose of
    keeping relevant information from the District 
    Court.” 429 U.S. at 436
    n.23; see also 
    id. at 439.
    Edwards argues that, pursuant to § 2518(1)(b)(iv), the
    Government was required to name him in its March 11
    Affidavit because the Government at that point had probable
    cause to believe both that he was involved in the cocaine
    distribution conspiracy at issue and that his communications
    would be intercepted by the wiretap. The Government does
    not argue that it lacked probable cause that Edwards was
    involved in the conspiracy, but instead argues that it had no
    reason to expect that the March 11 wiretap would intercept
    Edwards over Bowman’s TT2 phone specifically (as opposed
    to over Bowman’s TT3 phone).7
    7
    According to the 2014 edition of the United States Attorneys’
    Manual, the Government’s current policy goes beyond the
    minimum required by 18 U.S.C. § 2518 by mandating the naming
    in all wiretap affidavits of each person “whose involvement in the
    alleged offenses is indicated, even if not all those persons are
    expected to be intercepted over the target facility or at the target
    location.” U.S. Att’ys’ Manual, Crim. Resources Manual, 28
    Electronic Surveillance – Title III Applications ¶ E (2014 ed.),
    https://www.justice.gov/usam/criminal-resource-manual-28-
    electronic-surveillance-title-iii-applications (last visited July 6,
    2016). Appellants argue that the Government’s policy therefore
    required it to name Edwards in its March 11 Affidavit. However,
    such a policy is not judicially enforceable in a criminal case, see
    United States v. Kember, 
    648 F.2d 1354
    , 1370 (D.C. Cir. 1980), nor
    27
    By March 2011, the Government had captured pen
    register data showing that Edwards and Bowman had been in
    constant phone contact for at least a year. See Mar. 21 TT3
    Aff. ¶ 23 (displaying a chart cataloging 939 phone activations
    between Edwards and Bowman since January 2010).
    However, this contact occurred strictly over TT3. 
    Id. At no
    point during the three months the Government had been
    monitoring TT2 had Bowman received a single call from
    Edwards on that phone. As the district court noted, “[d]espite
    numerous opportunities to do so, the Defendant has never
    contested the Government’s assertion that the pen register on
    TT2 did not show any calls between Bowman and telephone
    numbers known or believed to be associated with Edwards.”
    Edwards, 
    889 F. Supp. 2d
    at 21 (internal quotation marks
    omitted). Thus, it was reasonable in this context for the
    Government to have expected any phone communications that
    were going to occur between Bowman and Edwards would
    occur over TT3, not TT2.
    To get around the Government’s reasonable inferences
    from Edwards’s past communication pattern, Edwards
    contends that even if he was not likely to call Bowman on
    TT2, the Government should have expected to pick up
    Edwards’s voice in the background of the TT2 wiretap
    because the Government had obtained some evidence
    suggesting that Bowman and Edwards had met on at least two
    occasions. Although the Government acknowledges that GPS
    data showed Bowman near an address associated with
    Edwards on two occasions, see Gov’t’s Opp’n Br. at 4, United
    States v. Edwards, No. 11-cr-129 (D.D.C. Oct. 20, 2012),
    is it relevant to whether the Government had probable cause to
    believe that Edwards’s conversations would be captured by TT2.
    28
    ECF No. 517, Edwards’s argument is nonetheless
    unpersuasive. First, it is not clear that Title III’s naming
    provision applies to the identity of individuals whose
    background conversations might be expected to be overheard
    during intercepted wire communications. We have found no
    authority on point, nor have the parties provided any.
    According to Appellants, “[t]he trial judge correctly
    concluded that the naming requirement extends to persons
    who might be overheard in the background of an intercept,”
    Appellants’ Br. 59 & n.173 (citing Edwards, 
    889 F. Supp. 2d
    at 25-26), but this is incorrect. Although the district court
    stated that “the plain language” of 18 U.S.C. § 2518(b)
    “would appear to encompass all communications recorded as
    a result of the wiretap, regardless of . . . whether the
    conversation took place over, or merely in the vicinity of, the
    target telephone,” the court also noted that it had been unable
    to locate any legal authority on the point, nor had the parties
    offered any, and it went on to state that “the Court need not
    resolve the scope of the Government’s burden in this respect
    because the Defendant failed to show that he should have
    been named as a target even if the Donovan requirements
    applied to background[] conversations.” Edwards, 889 F.
    Supp. 2d at 25-26.
    Assuming, without deciding, that such overheard
    conversations do implicate Title III’s naming requirement,
    Appellants fare no better. Even if Bowman and Edwards
    were in the same room, and Edwards was having a
    conversation with a third individual at the same time that
    Bowman was talking on TT2 to a fourth individual, it is
    unlikely that Bowman would stop speaking, and Edwards
    would start speaking, at just the right time, such that the TT2
    wiretap would clearly pick up Edwards’s conversation and
    enable the Government reliably to identify his voice. When
    viewed in concert with the fact that the Government had
    29
    evidence of only a few instances in which Bowman and
    Edwards may have met, it was not unreasonable for the
    Government to expect that it would not intercept Edwards’s
    voice in the background over the TT2 wiretap.
    This conclusion is supported by the fact that, during the
    period from January through March 2011, the Government
    never intercepted Edwards’s voice in the background over
    TT2, even during those times when the Government
    suspected Bowman and Edwards met. See Edwards, 889 F.
    Supp. 2d at 28. Thus, just as the Government lacked grounds
    to expect that Edwards would call Bowman on TT2, since he
    had not done so during the two and a half months it had
    intercepted calls placed from or to TT2, the Government had
    no reason on this record to expect that Edwards’s voice would
    be captured in the background of a TT2 call.
    Edwards also points out that on March 8-9, 2011, the
    Government ran an “ELSUR” electronic surveillance database
    check to determine whether Edwards had been the subject of
    prior intercept orders. The ELSUR check was disclosed in
    the wiretap application for TT3 submitted by the Government
    on March 21, 2011. Mar. 21 TT3 Aff. ¶ 49. Edwards argues
    that this fact lends further support to his contention that the
    Government was required to name him in its March 11
    wiretap application. At best, the ELSUR check demonstrates
    that the Government had probable cause to believe Edwards
    was involved in the investigated conspiracy and that the
    Government anticipated that he would become a target of a
    wiretap. See Edwards, 
    889 F. Supp. 2d
    at 20-21. It says
    nothing about whether Edwards’s communications were
    likely to be intercepted over TT2. Accordingly, this argument
    also lacks merit.
    30
    Edwards also claims that the Government violated 18
    U.S.C. § 2518(1)(e) by failing to disclose in its March 11
    Affidavit all prior wiretap applications that mentioned
    Edwards. However, the prior application requirement applies
    only to those individuals who must be named in the wiretap
    application in the first place. See 18 U.S.C. § 2518(1)(e)
    (requiring the disclosure of previous applications only for “the
    same persons . . . specified in the application”). Because the
    Government was not required to name Edwards in the March
    11 Affidavit, it was also not required to disclose prior
    applications naming Edwards.
    We therefore hold that the district court did not err in
    denying Edwards’s motion to suppress the fruits of the March
    11 wiretap. To the extent Edwards seeks a Franks hearing
    based on these same naming requirement claims, see
    Appellants’ Br. 62-63, 66; Appellants’ Reply Br. 30, we reject
    the contention for the same reasons.
    b. Appellants jointly argue that the Government’s
    omission of any information concerning Edwards from its
    March 11 Affidavit, when combined with the wiretap
    application’s other alleged deficiencies discussed above, 
    see supra
    Parts II.B.1-II.B.3, violated Title III’s necessity
    requirement, requiring the suppression of all evidence derived
    from the March 11 wiretap.            They claim that the
    Government’s alleged knowledge about Edwards and his
    connection to Bowman proves that the Government knew that
    Edwards was the source of Bowman’s supply. The March 11
    wiretap, according to Appellants, was therefore unnecessary
    because the Government already knew that Edwards was
    Bowman’s drug supplier. Appellants are incorrect. Title III’s
    necessity requirement obligates the Government to provide “a
    full and complete statement” concerning only “whether or not
    other investigative procedures have been tried and failed or
    31
    why they reasonably appear to be unlikely to succeed if
    tried.” 18 U.S.C. § 2518(1)(c). Title III does not require the
    Government to disclose every individual whom the
    Government suspects might be involved in the allegedly
    criminal activity. It requires only that the Government name
    those individuals “if known, committing the offense and
    whose communications are to be intercepted.”                
    Id. § 2518(1)(b)(iv).
    Appellants contend that had the Government included
    information about Edwards in its March 11 Affidavit, it would
    have been clear to the authorizing court that no further
    wiretap surveillance was necessary because the information
    would have demonstrated that the Government already knew
    the source of Bowman’s drugs: Edwards. We disagree.
    First, it is not clear that the Government had firm
    information identifying Edwards as Bowman’s supplier. The
    Government acknowledges that “investigators . . . had reason
    to suspect Edwards was involved” but maintains that “they
    certainly did not have proof he was Bowman’s conduit to
    imported cocaine.” Appellee’s Br. 58-59. Without firm
    proof, the Government persuasively contends that “holes
    remained in the evidence that could only reasonably be filled
    by a wiretap.” 
    Id. at 58
    (quoting 
    Eiland, 738 F.3d at 349
    ).
    Second, even if the Government had included in its
    March 11 application discussion of Edwards and had noted its
    suspicion that he was Bowman’s source, we are not persuaded
    that it would have changed the authorizing court’s necessity
    analysis. Appellants claim in conclusory fashion that if the
    Government had discussed Edwards in the March 11
    application, it would have “caused the district judge to
    scrutinize more carefully the March 11th application,”
    Appellants’ Br. 55, but Appellants fail to specify how such
    32
    supposed close scrutiny would have changed the court’s
    necessity analysis.
    Like Appellants’ other claims concerning the alleged
    deficiencies of the Government’s wiretap applications, we
    find their arguments concerning the Government’s decision
    not to name Edwards in its March 11 Affidavit unpersuasive.
    Accordingly, we affirm the district court’s finding that the
    Government’s March 11 Affidavit did not violate Title III’s
    naming or necessity requirement.
    III. Lay Opinion Testimony
    Appellants also contend, renewing objections they made
    before and during trial, that the district court erred in allowing
    lay opinion testimony by FBI Special Agent John Bevington
    that circumvented the requirements of Federal Rules of
    Evidence 701, 702, and 704. Specifically, they contend that
    Agent Bevington’s testimony conflated expert opinion with
    lay opinion testimony by presenting as lay testimony
    interpretations of audio and video recordings that were clearly
    based on his expertise as an FBI agent. This error was not
    harmless as to Williams, they contend, because Agent
    Bevington’s testimony failed to adhere to limitations on
    expert testimony and was used by the Government to
    establish Williams’s (and to some extent Bowman’s) guilt.
    Our review of the admission of Agent Bevington’s lay
    opinion testimony is for abuse of discretion. See United
    States v. Williams, 
    212 F.3d 1305
    , 1308 (D.C. Cir. 2000).
    Our evaluation of the harmlessness of any such error proceeds
    under the standard in Kotteakos v. United States, 
    328 U.S. 750
    , 764-65 (1946). See Bank of Nova Scotia v. United
    States, 
    487 U.S. 250
    , 256 (1988). The Government has the
    33
    burden to show any error was not prejudicial. See United
    States v. Smart, 
    98 F.3d 1379
    , 1390 (D.C. Cir. 1996).
    In view of our opinion in United States v. Hampton, 
    718 F.3d 978
    (D.C. Cir. 2013), which was decided after
    Appellants’ trial, the Government concedes that some of
    Agent Bevington’s lay opinion testimony was inadmissible
    under Federal Rule of Evidence (“FRE”) 701 for failing to
    establish the bases for his opinion but maintains that any error
    was harmless. We agree and find other error as well. We
    therefore conclude that the admission of Agent Bevington’s
    lay opinion testimony was error under FRE 701 and that the
    error was not harmless as to Williams. Accordingly, we
    reverse Williams’s conviction and remand his case to the
    district court for further proceedings.
    A.
    FRE 701 provides that a witness who is not testifying as
    an expert may only provide testimony regarding his or her lay
    opinion where it is: “(a) rationally based on the witness’s
    perception; (b) helpful to clearly understanding the witness’s
    testimony or to determining a fact in issue; and (c) not based
    on scientific, technical, or other specialized knowledge” of the
    sort that is properly the subject of expert opinion testimony
    under FRE 702. FRE 701 was designed to ensure that any
    opinions offered by a lay witness are based on personal,
    “first-hand knowledge or observation,” Fed. R. Evid. 701 adv.
    comm. note (1972 proposed rule), and “a process of reasoning
    familiar in everyday life,” Fed. R. Evid. 701 adv. comm. note
    (2000 amend.) (quoting State v. Brown, 
    836 S.W.2d 530
    , 549
    (Tenn. 1992)). The “prototypical example[s]” of lay opinion
    testimony envisioned by the Advisory Committee when
    proposing to add subsection (c) were opinions regarding
    “items that cannot be described factually in words apart from
    inferences,” such as size, degrees of darkness, speed, distance,
    34
    or whether a person appeared sad or angry. Fed. R. Evid. 701
    adv. comm. note (2000 amend.) (quoting Asplundh Mfg. Div.
    v. Benton Harbor Eng’g, 
    57 F.3d 1190
    , 1196 (3d Cir. 1995)).
    The addition of subsection (c) was intended to preclude
    litigants from proffering an expert in lay witness’s clothing
    and thereby avoid the disclosure and other requirements for
    expert opinion testimony under FRE 702. See 
    id. (citing United
    States v. Figueroa-Lopez, 
    125 F.3d 1241
    , 1246 (9th
    Cir. 1997)).
    FRE 702 addresses expert testimony. It provides that a
    witness who is “qualified as an expert by knowledge, skill,
    experience, training, or education” may testify about his or
    her opinion where: “(a) the expert’s scientific, technical, or
    other specialized knowledge will help the trier of fact to
    understand the evidence or to determine a fact in issue; (b) the
    testimony is based on sufficient facts or data; (c) the
    testimony is the product of reliable principles and methods;
    and (d) the expert has reliably applied the principles and
    methods to the facts of the case.” These factors reflect that
    the Supreme Court has placed “gatekeeping” responsibilities
    on the trial courts “at the outset” and thereafter during trial to
    ensure that expert testimony is sufficiently reliable to help, as
    opposed to confuse and hinder, the jury. Daubert v. Merrell
    Dow Pharm., Inc., 
    509 U.S. 579
    , 592, 597 (1993). The
    Advisory Committee contemplated that this could be done
    through “[v]igorous cross-examination, presentation of
    contrary evidence, and careful instruction,” which it
    considered especially important in order to inform the jury of
    the limits of expert testimony. Fed. R. Evid. 702 adv. comm.
    note (2000 amend.) (quoting 
    Daubert, 509 U.S. at 595
    ). To
    facilitate the evaluation of reliability, expert opinion
    testimony is subject to disclosure requirements. See Fed. R.
    Evid. 703 & 705; see also Fed. R. Civ. P. 26(a)(2); Fed. R.
    Crim. P. 16(a)(1)(G). In addition, FRE 704(b) prohibits an
    35
    expert witness from “stat[ing] an opinion about whether [a]
    defendant did or did not have a mental state or condition that
    constitutes an element of the crime charged or of a defense”
    as such matters “are for the trier of fact alone.”
    The court held in United States v. Wilson, 
    605 F.3d 985
    ,
    1026 (D.C. Cir. 2010), that “an individual without
    personalized knowledge of a specific drug conspiracy may not
    testify about drug topics that are beyond the understanding of
    an average juror under Rule 701. Such a witness may be
    permitted to testify only as an expert under Rule 702.” Lay
    opinion is proper when it is based upon personal knowledge
    of events that occurred in the case being tried, because “[a]n
    individual testifying about the operations of a drug conspiracy
    because of knowledge of that drug conspiracy has
    ‘particularized’ knowledge and should be admitted as a lay
    witness.” 
    Id. On the
    other hand, “an individual testifying
    about the operations of a drug conspiracy based on previous
    experiences with other drug conspiracies has ‘specialized’
    knowledge and – provided his testimony meets the rule’s
    enumerated requirements – should be admitted as an expert.”
    
    Id. The court
    has “drawn that line because knowledge
    derived from previous professional experience falls squarely
    ‘within the scope of Rule 702’ and thus by definition outside
    of Rule 701.” United States v. Smith, 
    640 F.3d 358
    , 365
    (D.C. Cir. 2011) (quoting FRE 701(c)).
    More recently, in 
    Hampton, 718 F.3d at 981-84
    , the court
    held that the district court erred in admitting, over a proper
    objection, lay opinion testimony by an FBI agent interpreting
    recorded conversations between a defendant and an alleged
    co-conspirator without requiring him to disclose the
    “objective bases” of his opinion. As a consequence, FRE
    701’s requirements were not met and the jury was denied the
    information it needed in order to exercise its fact-finding
    36
    function by independently assessing the FBI agent’s lay
    opinion. The court adopted the analysis of the Second Circuit
    Court of Appeals stating: “[W]hen a witness has not identified
    the objective bases for his opinion, the proffered opinion
    obviously fails completely to meet the requirements of Rule
    701, first because there is no way for the court to assess
    whether it is rationally based on the witness’s perceptions,
    and second because the opinion does not help the jury but
    only tells it in conclusory fashion what it should find.” 
    Id. at 981
    (quoting United States v. Rea, 
    958 F.2d 1206
    , 1216 (2d
    Cir. 1992)). The court concluded that the proffered bases for
    the FBI agent’s opinion – namely, his having listened to “all
    of the [recorded] calls” and his “knowledge of the entire
    investigation” – was inadequate because its lack of specificity
    invited “the risk that he was testifying based upon information
    not before the jury, including hearsay” and left the jury with
    “no way of verifying his inferences or of independently
    reaching its own interpretations” as FRE 701 requires. Id at
    982-83 (quoting United States v. Grinage, 
    390 F.3d 746
    , 750
    (2d Cir. 2004)). Additionally, the court emphasized that
    “[j]udicial scrutiny of a law-enforcement witness’s purported
    basis for lay opinion is especially important because of the
    risk that the jury will defer to the officer’s superior knowledge
    of the case and past experiences with similar crimes.” Id at
    981-82 (citing 
    Grinage, 390 F.3d at 750-51
    ).
    As noted in 
    Hampton, 718 F.3d at 983
    , the court’s
    analysis reflects similar concerns the court has expressed with
    regard to the Government’s use of overview and summary
    witnesses to anticipate or interpret evidence for the jury, see
    United States v. Moore, 
    651 F.3d 30
    , 57 (D.C. Cir. 2011),
    concerns shared by other circuits, see United States v. Garcia,
    
    413 F.3d 201
    , 210-17 (2d Cir. 2005); United States v. Casas,
    
    356 F.3d 104
    , 117-20 (1st Cir. 2004). See also United States
    v. Lemire, 
    720 F.2d 1327
    , 1348-50 (D.C. Cir. 1983).
    37
    Subsequent to Hampton, the court held in United States v.
    Miller, 
    738 F.3d 361
    , 373 (D.C. Cir. 2013), that the admission
    of lay opinion testimony by two FBI agents and a detective
    who did not “set forth the specific bases (events, other calls,
    seizures of contraband, etc.) upon which their opinions rested
    . . . other than broad claims about knowledge they had gained
    from the investigation” is plain error because the jury had “no
    effective way to evaluate their opinions.”
    B.
    At trial, Agent Bevington provided two forms of opinion
    testimony: lay opinion testimony interpreting recorded
    conversations and other interactions between the alleged co-
    conspirators that he had listened to or observed during the
    FBI’s investigation, and expert opinion testimony on “the
    interpretation of words and phrases used by drug traffickers.”
    Trial Tr. 67 (Oct. 24, 2012, a.m. session). To distinguish
    between the two, the prosecutor generally inquired about
    Agent Bevington’s “expertise” or “expert opinion” when
    seeking expert opinion testimony, and his “experience in this
    case” or something similar when seeking lay opinion
    testimony. In relation to Williams, however, the prosecutor
    did not elicit expert opinion testimony regarding the meaning
    of particular words or phrases. Instead, all of Agent
    Bevington’s testimony interpreting wiretap recordings of
    phone conversations and, in a few instances, surveillance
    videos of meetings between Williams and Bowman was
    offered as lay opinion testimony. These recorded interactions
    between Williams and Bowman involved vague language and
    ambiguous conduct, but neither explicitly referred to cocaine
    nor showed Williams receiving cocaine from Bowman.
    Nonetheless, Agent Bevington’s testimony interpreted them
    for the jury as relating to the buying and selling of cocaine.
    38
    On direct examination, the prosecutor generally asked
    what opinion Agent Bevington had regarding the meaning of
    a specific recording based on his “experience in the
    investigation,” “prior calls that he had listened to in the
    investigation,” or something similar. For example, after
    playing a wiretap recording of a March 20, 2011, phone
    conversation between Bowman and Williams, the prosecutor
    asked Agent Bevington: “Based upon your experience with
    this investigation and the phone conversations that you’ve
    intercepted, do you have an opinion of what Mr. Williams
    was referring to when he stated, quote, [‘]I got one that is
    going to go as soon as I get it from you and then I’m going to
    get the one for me so is two possible?[’]” Agent Bevington
    testified: “Yes. He had a customer that wanted a quantity of
    cocaine but he also wanted a quantity of cocaine for himself.”
    Trial Tr. 52-53 (Nov. 8, 2012, p.m. session).
    At times, however, the prosecutor instead asked for
    Agent Bevington’s opinion in reference to his review of
    specific evidence. For example, after playing a wiretap
    recording of a March 12, 2011, phone conversation between
    Bowman and Williams, the prosecutor asked: “[B]ased upon
    the other interceptions involving Mr. Bowman that we’ve
    listened to from March 12th of 2011, and your observations of
    the surveillances of Mr. Bowman that day, what did you
    understand Mr. Bowman to be referring to when he told Mr.
    Williams, quote, ‘I got a couple of other people coming to see
    me, but you know what I mean, I don’t want all of you,
    everybody to come at the same time’?” Agent Bevington
    testified: “He was telling Mr. Williams that he had other
    customers that he was going to be meeting with, and he didn’t
    want all the customers to arrive at the same time.” Trial Tr.
    73-74 (Nov. 8, 2012, a.m. session). On cross-examination,
    when defense counsel asked whether his opinions regarding
    the meaning of the conversations and interactions between
    39
    Bowman and Williams were “based on what [he] learned in
    this investigation[,]” Agent Bevington testified: “Right, based
    on what I overheard on the phone and what I saw in
    surveillance, yes.” Trial Tr. 65 (Nov. 9, 2012, a.m. session).
    The Government properly concedes in light of Hampton
    that some of Agent Bevington’s lay opinion testimony about
    Williams’s conversations with Bowman was inadmissible
    because the articulated bases for his opinions referred too
    generally to Agent Bevington’s knowledge of the
    investigation or his review of unspecified phone calls or
    surveillance operations. See Appellee’s Br. 75-76. In
    
    Hampton, 718 F.3d at 982-83
    , Agent Bevington had referred
    to having “listened to all of the calls . . . [and] done the
    surveillance” and to his “knowledge of the entire
    investigation” as the bases for his lay opinion. In 
    Miller, 738 F.3d at 373
    , the FBI agents and detective similarly claimed to
    have based their lay opinion on their “knowledge of the
    overall investigation.” Neither explanation was held to be
    sufficient under FRE 701. As the prosecutor and Agent
    Bevington offered essentially the same objective bases for
    Agent Bevington’s lay opinions here as in Hampton and
    Miller, the requirements of FRE 701 were not met.
    The lay opinion testimony that Agent Bevington provided
    in response to questions referencing specific evidence also
    failed to conform to the requirements of FRE 701. The
    Government views this testimony as properly admitted under
    Hampton because “[Agent] Bevington stated that [his]
    opinions were based on specific calls and/or surveillance
    operations conducted on precise dates.” Appellee’s Br. 75.
    In fact, Agent Bevington stated no such thing. Instead, when
    asked whether he had an opinion regarding the meaning of
    certain conversations and interactions based on his review of
    the specified evidence, Agent Bevington stated his
    40
    interpretation. Nowhere did Agent Bevington establish that
    the evidence referenced in the prosecutor’s question was a
    factual basis for his lay opinion testimony, let alone a
    complete and accurate statement of the bases on which he
    relied.     Nor could the prosecution’s questions alone
    necessarily establish the bases for Agent Bevington’s lay
    opinion. Because, on this record, only Agent Bevington had
    personal knowledge of what perceptions and reasoning he
    relied on in formulating his lay opinion, only he was able to
    provide the “sufficient factual foundation” necessary “to
    admit lay opinion evidence rationally based on [his]
    perception.” 
    Williams, 212 F.3d at 1309
    n.6; see also 
    Garcia, 413 F.3d at 211-13
    (citing Fed. R. Evid. 602). Hence, FRE
    701 requires that “[a] witness . . . identif[y] the objective
    bases for his [or her] opinion,” not the attorney directing the
    examination. 
    Hampton, 718 F.3d at 981
    (emphasis added)
    (quoting 
    Rea, 958 F.2d at 1216
    ). Otherwise, the prosecutor
    could present rationalizations for Agent Bevington’s lay
    opinions on which he may not have actually relied, effectively
    vouching for the bases of his lay opinion, misleading the jury,
    and defeating the purposes of FRE 701. Even assuming,
    notwithstanding limitations on the use of leading questions,
    see Green v. United States, 
    348 F.2d 340
    , 341-42 (D.C. Cir.
    1965), this approach would suffice under FRE 701, the
    Government points to no instance in which the prosecutor
    elicited testimony from Agent Bevington that his lay opinion
    was, in fact, based on the factual foundation stated in the
    prosecutor’s question. Nor can such confirmation be inferred
    from Agent Bevington’s responses in view of his testimony
    on cross-examination that his opinions were based generally
    on his observations throughout the investigation. See Trial
    Tr. 65 (Nov. 9, 2012, a.m. session).
    The requirement that Agent Bevington adequately
    disclose the objective bases for his lay opinion stems from the
    41
    inter-related requirements of FRE 701. Without knowing
    what observations and reasoning Agent Bevington relied on in
    arriving at his lay opinion, it is doubtful the district court
    could determine that his testimony was “rationally based on
    [his] perception” as required by FRE 701(a), much less be
    confident that his testimony would be “helpful” to the jury in
    “clearly understanding the witness’s testimony or to
    determining a fact in issue” by assisting it in its fact-finding
    role as required by FRE 701(b). Instead, Agent Bevington’s
    testimony may have been “based upon information not before
    the jury, including hearsay,” thereby potentially “usurp[ing]
    the jury’s function” by presenting the conclusion that should
    be drawn from facts of which he, but not the jury, was fully
    aware. 
    Hampton, 718 F.3d at 983
    (quoting 
    Grinage, 390 F.3d at 750-51
    ). Jurors not informed of the bases for Agent
    Bevington’s lay opinion might also have thought that Agent
    Bevington “had knowledge beyond what was before them . . .
    defer[ing] to the officer’s superior knowledge of the case and
    past experiences with similar crimes,” 
    id. at 981-83
    (quoting
    
    Grinage, 390 F.3d at 750
    ), rather than independently reaching
    their own opinions about the evidence and ultimately about
    whether the Government had met its burden of proof. These
    risks would not have been mitigated by admitting into
    evidence all of the wiretap recordings and other investigatory
    materials available to Agent Bevington because the jury
    would still have been unaware of what exact perceptions and
    reasoning led to his lay opinions. See 
    id. at 983
    (citing
    
    Grinage, 390 F.3d at 747-48
    ); see also 
    id. at 984-86
    (Brown,
    J., concurring). Here, the Government confirmed that not all
    of the surveillance videos that Agent Bevington
    acknowledged he had reviewed as part of his investigation
    were admitted in evidence, implying that his opinions may
    have been partly based on information that was not before the
    jury. When a witness fails to identify for the jury the specific
    observations and inferences on which he grounds each lay
    42
    opinion, there is no way for the jury to independently evaluate
    the testimony.
    Additionally, ignorance of the bases for Agent
    Bevington’s lay opinion testimony blurs the distinction in
    FRE 701(c) between lay and expert opinion testimony. As
    the Second Circuit has explained:
    In 2001, Rule 701 was amended to provide that
    testimony cannot be received as lay opinion if it is
    based on scientific, technical, or other specialized
    knowledge. Rather, a lay opinion must be the product
    of reasoning processes familiar to the average person
    in everyday life. . . . The purpose of this final
    foundation requirement is to prevent a party from
    conflating expert and lay opinion testimony thereby
    conferring an aura of expertise on a witness without
    satisfying the reliability standard for expert testimony
    set forth in Rule 702 and the pre-trial disclosure
    requirements set forth in [Federal Rule of Criminal
    Procedure] 16 and [Federal Rule of Civil Procedure]
    26. Thus, in considering the third prerequisite for lay
    opinion testimony, a court must focus on the reasoning
    process by which a witness reached his proffered
    opinion. If the opinion rests in any way upon
    scientific, technical, or other specialized knowledge,
    its admissibility must be determined by reference to
    Rule 702, not Rule 701.
    
    Garcia, 413 F.3d at 215-16
    (internal citations, footnote, and
    quotation marks omitted). Allowing opinion testimony
    without knowing whether Agent Bevington’s opinion
    testimony was based to some extent on scientific, technical, or
    specialized knowledge would leave the district court unable to
    determine whether the reliability and disclosure requirements
    43
    of FRE 702 applied. As a result, there was a risk that Agent
    Bevington’s opinion testimony may have provided expert
    opinion on “a mental state or condition that constitutes an
    element of the crime charged” contrary to FRE 704(b).
    Furthermore, the Government’s use of Agent Bevington
    as a “two-hatted” witness providing closely related lay and
    expert opinion testimony exacerbated these risks. Although
    the district court instructed the jury on the use of expert
    testimony and required the prosecutor to signal in questioning
    when Agent Bevington’s expert opinion was being sought, the
    manner in which Agent Bevington’s expert and lay opinions
    were interspersed during the trial required mental gymnastics
    of the jurors in determining when he was testifying as an
    expert and when he was not, risking confusion, particularly
    absent an adequate explanation of the bases for his lay
    opinions to distinguish them from his expert opinions. This
    “two-hatted” circumstance is mentioned by Appellants only in
    a footnote, see Appellants’ Br. 98 n.315, and on appeal they
    do not challenge the jury instructions in this regard, much less
    indicate that they sought an instruction to assist the jury in
    distinguishing when Agent Bevington was not testifying as an
    expert. See United States v. Rhodes, 
    62 F.3d 1449
    , 1453-54
    (D.C. Cir. 1995), rev’d on other grounds, 
    517 U.S. 1164
    (1996). The fact that an instruction was given on Agent
    Bevington’s expert testimony alone could, in these
    circumstances, have led the jury reasonably to assume that all
    of his opinion testimony was based upon his expertise and not
    merely on his own perceptions of events presented to the jury.
    For these reasons, we hold that there was a significant
    risk that Agent Bevington’s lay opinion testimony assumed an
    “aura of special reliability and trustworthiness surrounding
    expert testimony,” which may in turn have prejudiced
    Williams. United States v. Cruz, 
    363 F.3d 187
    , 194 (2d Cir.
    44
    2004) (quoting United States v. Dukagjini, 
    326 F.3d 45
    , 53
    (2d Cir. 2002)).
    C.
    The question remains whether the error in admitting
    Agent Bevington’s lay opinion testimony was prejudicial.
    Appellants maintain that the error was prejudicial. This
    depends on whether, “after examining the record as a whole,”
    the court concludes that “[the] error may have had ‘substantial
    influence’ on the outcome of the proceeding.” Bank of Nova
    
    Scotia, 487 U.S. at 256
    (quoting 
    Kotteakos, 328 U.S. at 765
    ).
    That is:
    [I]f one cannot 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, it is
    impossible to conclude that substantial rights were not
    affected. The inquiry cannot be merely whether there
    was enough to support the result, apart from the phase
    affected by the error. It is rather, even so, whether the
    error itself had substantial influence. If so, or if one is
    left in grave doubt, the conviction cannot stand.
    
    Kotteakos, 328 U.S. at 765
    . In other words, the “harmless
    error test . . . is not a mere sufficiency-of-the-evidence
    inquiry,” but requires reversal if the properly admitted
    evidence is “even slightly ambiguous” and there is any risk
    that the error might not be harmless. 
    Smart, 98 F.3d at 1391
    -
    92.
    The Government points to the “overwhelming evidence
    of Williams’s and Bowman’s guilt” as indicating that Agent
    Bevington’s lay opinions were likely unnecessary, an
    observation that the district court also made during trial.
    45
    Appellee’s Br. 79. But unlike the overwhelming physical and
    testimonial evidence supporting the convictions of Bowman
    and Edwards, eliminating any suggestion their convictions
    must be reversed, the evidence against Williams was of a far
    lesser order.       Agent Bevington conceded on cross-
    examination that there was no direct evidence before the jury
    that Williams possessed or sold cocaine to third parties or
    interacted with co-conspirators other than Bowman. No
    witness testified to having bought cocaine from Williams; no
    surveillance video showed him handling anything that any
    witness identified as cocaine; no audio tape disclosed him
    discussing cocaine, or anything that any witness other than
    Agent Bevington identified as cocaine; no one testified to
    stopping or arresting Williams and finding cocaine in his car,
    his home, or otherwise in his possession. See Trial Tr. 66-72
    (Nov. 9, 2012, a.m. session).
    The prosecutor’s closing argument focused instead on the
    interactions between Williams and Bowman as showing “the
    same exact pattern” as Bowman’s interactions with others to
    whom he was selling cocaine, and told the jurors to “[a]sk
    [them]selves” whether “it makes any sense that people would
    speak on the phone in the manner that William Bowman and
    Henry Williams did” if they were not “discussing drug
    trafficking.” Trial Tr. 49-50 (Nov. 15, 2012, a.m. session). In
    other words, in the absence of direct evidence of Williams’s
    guilt, the prosecutor relied on the inferences jurors were
    willing to draw from Williams’s interactions with Bowman,
    as reflected in the wiretap and surveillance recordings the jury
    had viewed at trial. This is the exact subject addressed by
    Agent Bevington’s erroneously admitted lay opinion
    testimony, which told the jury to interpret the circumstantial
    evidence as showing that Williams was buying cocaine from
    Bowman in amounts that indicated his intent to sell drugs to
    third parties. Agent Bevington told the jurors not only what
    46
    he thought, but his opinion of what the evidence showed and
    that he had substantial experience in drug conspiracy
    investigations and was involved in the FBI investigation that
    resulted in Appellants’ indictments. As in 
    Hampton, 718 F.3d at 984
    , there was a strong “likelihood that the jurors afforded
    [Agent] Bevington substantial authority because of his
    expertise and access to information unavailable to them,”
    allowing his lay opinion testimony to influence their decision.
    Indeed, the district court observed that “the jury’s
    determination as to whether or not . . . Williams was a
    member of the conspiracy may turn on whether the jury
    chooses to credit lay opinions expressed by FBI Special
    Agent Bevington, or reach their own conclusions as to the
    nature of certain phone calls between Defendants Bowman
    and Williams.” Order at 4, United States v. Edwards, 11-cr-
    129 (D.D.C. Nov. 12, 2012), ECF No. 561.
    Under the circumstances, the court cannot “say, with fair
    assurance, . . . that the judgment [as to Williams] was not
    substantially swayed by the error” as to render it harmless,
    
    Kotteakos, 328 U.S. at 765
    , and his conviction for conspiring
    to distribute and possess less than 500 grams of cocaine must
    be reversed.
    D.
    The question remains whether Williams can be retried.
    Appellants contend that the district court erred in denying his
    motion for a judgment of acquittal because of the
    insufficiency of the evidence against him. If that is correct,
    then he is entitled to a judgment of acquittal and his retrial
    would be barred under the Double Jeopardy Clause of the
    Fifth Amendment. See Burks v. United States, 
    437 U.S. 1
    ,
    13-17 (1978). Appellants are not correct, however.
    47
    Viewing the evidence in the light most favorable to the
    Government, as the court must, “[a] rational trier of fact could
    have found the essential elements of [Williams’s] crime
    beyond a reasonable doubt” based on the properly admitted
    evidence. United States v. Dykes, 
    406 F.3d 717
    , 721 (D.C.
    Cir. 2005) (quoting United States v. Arrington, 
    309 F.3d 40
    ,
    48 (D.C. Cir. 2002) (quoting Jackson v. Virginia, 
    443 U.S. 307
    , 319 (1979))). The court recently declined to decide
    whether, in evaluating a claim for insufficient evidence, a
    court should consider all the evidence before the jury or only
    that evidence not erroneously admitted, see United States v.
    McGill, 
    815 F.3d 846
    , 927-28 (D.C. Cir. 2016)
    (distinguishing Lockhart v. Nelson, 
    488 U.S. 33
    , 39-42
    (1988)), and because it makes no difference to the conclusion
    here, we assume without deciding that the more demanding
    standard applies and do not consider Agent Bevington’s
    erroneously admitted lay opinion testimony.
    To prove the essential elements of a narcotics conspiracy
    under 21 U.S.C. § 846, the Government had to show that
    Williams “knowingly entered into the . . . conspiracy with the
    specific intent to further its objective of distributing
    narcotics.” United States v. Gaskins, 
    690 F.3d 569
    , 577 (D.C.
    Cir. 2012). Such an agreement can be inferred from
    circumstantial evidence. See United States v. Gatling, 
    96 F.3d 1511
    , 1518 (D.C. Cir. 1996). Even without Agent
    Bevington’s lay opinion testimony, there was sufficient
    evidence to show Williams’s knowing involvement in the
    charged conspiracy. The evidence shows that Bowman and
    Edwards received a shipment of cocaine on or about March
    10, 2011. As confirmed by wiretap recordings, surveillance
    videos, and testimony of cooperating witnesses, Bowman
    shortly thereafter began to make arrangements to sell cocaine
    to individuals who met him in the vicinity of the “Shrimp
    Boat” restaurant and a nearby condominium. Bowman
    48
    continued to make cocaine sales at these and other locations
    for several weeks.
    Bowman’s interactions with Williams paralleled
    Bowman’s interactions with other alleged co-conspirators. At
    trial, wiretap recordings of their phone conversations in
    January and February 2011 showed that Williams repeatedly
    checked with Bowman regarding the status of some
    unspecified event, which Bowman generally indicated had not
    yet happened. On March 12, 2011, however, Bowman
    phoned Williams to tell him that he could “holler at
    [Bowman] in a little bit” near the Shrimp Boat restaurant, but
    warned Williams that he had a “couple of other people
    coming to see [him]” and “d[id]n’t want . . . everybody to
    come at the same time.” Gov’t Ex. 3056A. Bowman and
    Williams were videotaped meeting that evening outside the
    Shrimp Boat restaurant sitting in Williams’s car.
    Bowman and Williams spoke again the morning of
    March 15, 2011, and arranged to meet again later that day.
    Security footage at a public storage facility where Bowman
    and Edwards stored and processed cocaine for distribution
    showed Bowman visiting the facility shortly before his
    meeting with Williams. Bowman and Williams were later
    videotaped meeting outside the Shrimp Boat restaurant.
    Williams called Bowman again on March 20, 2011, and
    asked if Bowman was “still . . . alright with man” and whether
    “two [was] possible,” saying: “I got one that gonna go as soon
    as I get it from you, is gonna go, and then I’m gonna get the
    one for me.” Gov’t Ex. 3096A. Bowman said it was
    possible. In a wiretapped phone conversation the next day on
    March 21, 2011, Bowman phoned Moorer, a confessed co-
    conspirator of Bowman and Edwards, and told him: “You
    know what I just told you? . . . Just add . . . to that one.”
    49
    Gov’t Ex. 3129A. Moorer testified as a cooperating witness
    at trial that this was Bowman requesting that Moorer bring
    him more cocaine. A videotape showed Bowman meeting
    with Moorer on March 21, 2011, when Moorer provided
    Bowman with what Moorer testified were three sixty-two-
    gram quantities of cocaine. As Moorer testified at trial:
    “When I met [Bowman], he told me . . . two guys wanted
    [cocaine]. I guess one of them wanted more.” Trial Tr. 35
    (Nov. 2, 2012, p.m. session). In two wiretapped phone
    conversations on March 22, 2011, Williams asked Bowman
    questions to the effect of: “[B]efore I get rid of this joint . . .
    [y]ou . . . good for tomorrow? You got it?” Gov’t Ex.
    3107A; see also Gov’t Ex. 3106A. Bowman replied he did.
    The next day, March 23, 2011, a surveillance video showed
    Bowman and Williams meeting once again in Williams’s car
    outside the Shrimp Boat restaurant.
    A reasonable juror could infer from this evidence and
    evidence regarding Bowman’s sales to other alleged co-
    conspirators that Bowman and Williams were engaged in
    cocaine trafficking. Unlike in 
    Gaskins, 690 F.3d at 574
    , on
    which Appellants rely, this is not a case in which there was
    “no evidence that [Williams] participated in any drug
    transactions or conspiratorial meetings . . . [or] was ever
    present at or near the” site of the conspiracy’s activities.
    Instead, a juror could reasonably find that Bowman was
    selling cocaine to Williams based on the timing, nature, and
    locations of Bowman’s interactions with Williams. From the
    frequency with which he received quantities of cocaine from
    Bowman, as well as his March 20 statement (“I got one that
    gonna go as soon as I get it from you . . . and then I’m gonna
    get the one for me,” Gov’t Ex. 3096A), a reasonable juror
    could also find that Williams intended to distribute cocaine to
    third parties. And a reasonable juror could find that Bowman
    and Williams’s frequent discussion of others who were
    50
    involved in similar activities with Bowman showed that
    Williams had the requisite knowledge of the conspiracy. That
    there may be alternative interpretations of the evidence is not
    relevant because the court must presume that the jury resolved
    any conflicting inferences supported by the record in the
    Government’s favor.       See 
    Jackson, 443 U.S. at 326
    .
    Accordingly, we hold that the district court did not err in
    denying Williams’s motion for a judgment of acquittal.
    IV. Wired Plea Agreement
    Bowman argues that the Government violated his Fifth
    Amendment due process rights by offering him a “wired” plea
    deal that was contingent on Williams pleading guilty to the
    charged drug conspiracy.     According to Bowman, the
    Government knew that a jury would only convict Williams if
    he was associated with the more culpable Bowman and so
    wired Bowman’s plea in a bad-faith attempt to ensure the two
    were tried together.
    As a threshold matter, the parties disagree over the
    applicable standard of review. Bowman contends that his due
    process claim is subject to de novo review. Cf. United States
    v. Straker, 
    800 F.3d 570
    , 629 (D.C. Cir. 2015). The
    Government, by contrast, argues that plain error review
    applies because Bowman did not raise his constitutional
    challenge before the district court. See United States v.
    Mahdi, 
    598 F.3d 883
    , 888 (D.C. Cir. 2010). We need not
    resolve that disagreement because Bowman’s due process
    argument fails under either standard. The parties also dispute
    whether the Government offered Bowman an opportunity to
    accept an “unwired” plea deal conditioned only on his own
    cooperation with the Government, rather than on Williams
    also pleading guilty. That preliminary factual dispute is
    51
    immaterial because, as we explain below, the Government’s
    “wired” plea agreement was constitutionally permissible.
    Bowman’s due process challenge fails under United
    States v. Pollard, 
    959 F.2d 1011
    (D.C. Cir. 1992). There, the
    Government conditioned any plea agreement for the
    defendant’s ailing wife on the defendant also pleading guilty.
    See 
    id. at 1015,
    1020. The defendant accepted that wired plea
    deal but claimed that it violated his due process rights by
    effectively coercing him into pleading guilty to secure a plea
    deal for his wife. See 
    id. at 1020
    (citing Fontaine v. United
    States, 
    411 U.S. 213
    , 214-15 (1973)). The court concluded
    that the defendant’s due process argument was meritless and
    joined its sister circuits in holding that plea wiring “does not,
    per se, offend due process.” 
    Id. The court
    explained that the
    wired plea accepted by the defendant was constitutional
    because the Government “had probable cause to arrest and
    prosecute both defendants in a related crime, and there [wa]s
    no suggestion that the government conducted itself in bad
    faith in an effort to generate additional leverage over the
    defendant.” 
    Id. at 1021.
    There is even less concern on this record than in Pollard
    that Bowman was somehow coerced by the Government’s
    decision to offer him a plea deal contingent on a co-
    defendant’s guilty plea. There is no argument here that the
    Government induced Bowman to plead guilty by promising a
    shorter sentence for any loved one or spouse. Cf. 
    id. (“We can
    understand how it might be thought that a threat of long
    imprisonment for a loved one, particularly a spouse, would
    constitute even greater pressure on a defendant than a direct
    threat to him.”). Nothing in the record suggests that the
    Government wired Bowman’s plea in a bad-faith effort to
    coerce him into involuntarily accepting a plea or to convict
    Williams based on guilt by association.           Rather, the
    52
    Government offered Bowman the opportunity to plead guilty
    to a lower sentence if his alleged co-conspirator, Williams,
    also pleaded guilty.        A plea offer that reflects the
    Government’s apparent preference either to accept guilty
    pleas from both defendants or, if it must try Williams, to try
    Bowman as well provides no basis to conclude that the
    Government’s offer was coercive or made in bad faith.
    Bowman nevertheless urges us to infer the Government’s bad
    faith from the fact that Williams played a much more minor
    role in the charged conspiracy. But we decline the invitation
    to assign nefarious intent to the Government’s conduct based
    on Bowman’s speculation. Bowman also contends that the
    wired plea was itself evidence of the Government’s intent to
    force Williams and Bowman into a joint trial. The district
    court had denied Williams’s request to sever his trial from
    that of his co-defendants, thereby authorizing the Government
    to proceed against both defendants in the same trial. The
    record belies Bowman’s assertion that the wired plea was an
    unconstitutionally coercive ploy to try Williams and Bowman
    together.
    Additionally, the Government had probable cause to
    arrest and prosecute both Bowman and Williams for their
    participation in the charged drug trafficking conspiracy. As in
    Pollard, there is no plausible basis for Bowman’s suggestion
    that the Government resorted to “bad faith in an effort to
    generate additional leverage” over Bowman and Williams.
    
    Id. In light
    of the evidence and information gathered from
    wiretaps, physical surveillance, and confidential sources, 
    see supra
    Parts I & III.D, the arresting agents reasonably
    concluded that Bowman and Williams each participated in the
    suspected cocaine distribution conspiracy. See generally
    United States v. Holder, 
    990 F.2d 1327
    , 1328 (D.C. Cir.
    1993) (“Probable cause exists if a reasonable and prudent
    police officer would conclude from the totality of the
    53
    circumstances that a crime has been or is being committed.”).
    It is undisputed that the Government obtained a valid
    indictment charging both Bowman and Williams with
    conspiring to distribute cocaine, which “conclusively
    determines the existence of probable cause” in their criminal
    case. Gerstein v. Pugh, 
    420 U.S. 103
    , 117 n.19 (1975).
    Because the Government “had probable cause to [arrest and]
    prosecute” Bowman and Williams and “obtained a valid
    indictment” against them, “it was entitled . . . to prosecute
    [Appellants] fully” or “to offer lenience.” 
    Pollard, 959 F.2d at 1021
    . Bowman might have preferred an offer of lenience
    in the form of an unwired plea agreement, but he had “no
    right to be offered a plea” at all, Missouri v. Frye, 
    132 S. Ct. 1399
    , 1410 (2012), much less the particular plea agreement of
    his choosing. Accordingly, the Government’s plea offer did
    not violate Bowman’s due process rights.
    V. Acquitted Conduct in Sentencing
    Edwards argues that the district court violated his Fifth
    and Sixth Amendment rights by increasing his sentence based
    on his possession of a firearm, even though the jury had
    acquitted him of that same conduct. Controlling precedent
    squarely forecloses that argument, as Edwards correctly
    acknowledges. In United States v. Bell, 
    795 F.3d 88
    (D.C.
    Cir. 2015), this court stated that “long-standing precedents of
    the Supreme Court and this Court establish that a sentencing
    judge may consider uncharged or even acquitted conduct in
    calculating an appropriate sentence, so long as that conduct
    has been proved by a preponderance of the evidence and the
    sentence does not exceed the statutory maximum for the
    crime of conviction or increase the statutory mandatory
    minimum.” 
    Id. at 103
    (internal quotation marks omitted); see
    United States v. Jones, 
    744 F.3d 1362
    , 1369 (D.C. Cir. 2014);
    United States v. Settles, 
    530 F.3d 920
    , 923-24 (D.C. Cir.
    54
    2008). Because Bell is binding on this panel – and
    notwithstanding the serious concerns that some have raised,
    see United States v. Bell, 
    808 F.3d 926
    , 928-32 (D.C. Cir.
    2015) (Millett, J., concurring in denial of rehearing en banc);
    
    id. at 927-28
    (Kavanaugh, J., same) – we must reject
    Edwards’s constitutional challenge and affirm his sentence.
    See LaShawn A. v. Barry, 
    87 F.3d 1389
    , 1393 (D.C. Cir.
    1996) (en banc).
    Conclusion
    For the foregoing reasons, we affirm the judgments of the
    district court with respect to each Appellant, with the
    exception of Williams. Because the district court’s admission
    of Agent Bevington’s lay opinion testimony was error under
    FRE 701 and that error was not harmless, we reverse
    Williams’s conviction and remand the case to the district
    court for further proceedings. We therefore need not reach
    the question whether the district court erred by refusing to
    provide the jury with a multiple conspiracies instruction, issue
    limiting instructions concerning specific evidence submitted
    against Edwards and Bowman, or sever Williams’s trial from
    that of Edwards and Bowman.
    So ordered.