United States v. Aboshady ( 2020 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 19-1232
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    MOUSFAFA MOATAZ ABOSHADY,
    Defendant, Appellant.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. Nathaniel M. Gorton, U.S. District Judge]
    Before
    Howard, Chief Judge,
    Thompson and Barron, Circuit Judges.
    Joshua N. Ruby, with whom Peter E. Gelhaar, George W. Vien,
    and Donnelly, Conroy & Gelhaar, LLP were on brief, for appellant.
    Ross B. Goldman, Attorney, United States Department of
    Justice, Criminal Division, with whom Andrew E. Lelling, United
    States Attorney, David G. Lazarus, Assistant United States
    Attorney, Abraham R. George, Assistant United States Attorney,
    Brian A. Benczkowski, Assistant Attorney General, and Matthew S.
    Miner, Deputy Assistant Attorney General, were on brief, for
    appellee.
    February 20, 2020
    BARRON, Circuit Judge. Moustafa Aboshady ("Aboshady")
    challenges his 2018 federal convictions arising from a healthcare
    fraud conspiracy.      We affirm.
    I.
    In March 2014, Fathalla Mashali, Aboshady's uncle, was
    indicted and, in 2017, he pleaded guilty in the United States
    District Court for the District of Massachusetts to a multi-
    million-dollar healthcare fraud that he perpetrated through New
    England Pain Associates ("NEPA"), which Mashali owned.                      Mashali
    committed this fraud against both government and private insurers
    by   coordinating    the    fraudulent         documentation      of   non-existent
    medical   services     in       patients'        medical   records     to   justify
    reimbursement for services not rendered.
    From 2010 to 2013, Aboshady worked for Mashali in the
    billing   department       of    NEPA,    which     had    four   clinical    pain-
    management offices in New England, though its billing office was
    located in Cairo, Egypt.          When billers would send audit requests,
    employees in the billing department, including allegedly Aboshady,
    would "get the information together" and send it to the billers
    for them to then submit to the insurer.
    In connection with the fraud for which Mashali had been
    convicted, Aboshady was indicted on various federal charges in the
    United States District Court for the District of Massachusetts on
    September 27, 2016. The indictment was for one count of conspiracy
    - 3 -
    to   make   false    statements   and   to   conceal   in   connection   with
    healthcare benefit programs, in violation of 18 U.S.C. § 371, and
    two counts of false statements in connection with healthcare
    benefit programs, in violation of 18 U.S.C. § 1035.
    Aboshady pleaded not guilty to the charges against him,
    and a trial ensued.       The jury found Aboshady guilty on all three
    counts, and the District Court sentenced Aboshady to 75 months in
    prison.     He then timely filed this appeal.
    II.
    Aboshady's first set of challenges to his convictions
    concerns the District Court's denial of his December 2017 motion
    to suppress data that the government had acquired pursuant to a
    2014 warrant.       That warrant authorized the search and seizure of
    certain electronic data contained in six Gmail accounts, including
    Aboshady's.     The warrant provided that it was to be executed on
    Google, Inc.1
    We review a district court's findings of fact in denying
    a motion to suppress for clear error and its conclusions of law de
    1Below, in addition to filing his motion to suppress with
    the District Court, Aboshady also moved to compel discovery before
    the federal magistrate judge who had issued the search warrant to
    obtain information relating to the government's seizure of
    material obtained from Google via the warrant.      The Magistrate
    Judge held a hearing on that motion but then denied it in a written
    decision. Aboshady sought review of that ruling from the District
    Court.   Based in part on the Magistrate Judge's findings, the
    District Court denied the motion in a written opinion. Aboshady
    does not appeal that ruling to us.
    - 4 -
    novo.    See United States v. Almeida, 
    748 F.3d 41
    , 47 (1st Cir.
    2014).   Because "[s]uppression of evidence . . . has always been
    our last resort, not our first impulse," Utah v. Strieff, 
    136 S. Ct. 2056
    ,      2061   (2016),    it   is    permitted    only      when   the
    government's conduct in searching or seizing the evidence in
    question reflects a "deliberate, reckless, or grossly negligent
    disregard for Fourth Amendment rights," Davis v. United States,
    
    564 U.S. 229
    ,    238   (2011)    (internal    quotation     marks    omitted)
    (quoting Herring v. United States, 
    555 U.S. 135
    , 144 (2009)).
    Aboshady argues that the District Court erred in denying
    his suppression motion because the government executed the warrant
    in a manner that reflects a flagrant disregard of the warrant's
    terms.   He contends that this flagrant error in execution occurred
    because the government required Google, Inc. to hand over a drive
    that held all of the data in Aboshady's account, including certain
    electronic documents that contained very personal information of
    his, and then, in preparation for trial, retained all of that data
    and   possibly      searched   it    (including    in   those    searches      the
    electronic documents within that data that contained that personal
    information).       Aboshady appears to premise this contention on an
    assertion that the warrant did not permit the government to retain
    for as long as it did either his personal emails or any of the
    other electronic documents contained within the data that the
    government had acquired from Google, Inc.               He also appears to
    - 5 -
    contend that the warrant did not permit the government to then
    search the personal information contained in the emails and the
    electronic documents to which he refers.
    We begin by considering what the record shows about the
    government's execution of the warrant on Google, Inc.                    Section II
    of the warrant, which is entitled "Accounts and Files to be Copied
    by Google, Inc. Personnel[,]" clearly states that Google, Inc. was
    to     copy      "[a]ll       data      files        associated        with      . . .
    tifaaboshady@gmail.com" and that "Google, Inc. will provide th[at]
    account duplicate to law enforcement personnel.                   Law enforcement
    personnel will then search the account duplicate for the records
    and data to be seized."          In accord with the plain terms of that
    section of the warrant, the government executed the warrant on
    Google, Inc., and, in response, the company produced a duplicate
    data file of Aboshady's Gmail account, including the personal
    emails that he singles out. Subsequently, in accord with the plain
    terms of that section of the warrant, personnel from the Federal
    Bureau   of    Investigation         ("FBI")    who    were   not    part     of   the
    prosecution     team   then    uploaded    to    a    searchable       database    the
    estimated 430,081 documents contained in the data file that Google,
    Inc.   had    turned   over,     applied       search    terms    to    filter     out
    potentially      privileged     communications,         and   then      turned     the
    - 6 -
    database over to the investigative team.2 Thus, we see no violation
    of   the   warrant,   let   alone   a   flagrant   one,   in   either   the
    government's execution of the warrant on Google, Inc. or its
    subsequent creation of the database.
    We turn, then, to the government's execution of the
    warrant once that database had been created.          As this aspect of
    the government's execution does not implicate Section II of the
    warrant, we focus, as Aboshady does, on Section III, which is
    entitled "Records and Data to be Searched and Seized by Law
    Enforcement Personnel."      That section of the warrant states that
    the government is authorized to search within, and to seize from,
    the data that it has acquired from Google, Inc. pursuant to Section
    II the following: "[a]ll communications between or among" the six
    accounts; "[a]ll communications pertaining to patient records,
    billing, and/or claims for payment relating to NEPA patients";
    records relating to "[t]he identity of the person or persons who
    have owned or operated the e-mail accounts"; the "existence and
    identity of any co-conspirators"; and "[t]he travel or whereabouts
    of" the owners of the six accounts.
    2
    We note that Federal Rule of Criminal Procedure 41(e)(2)(B)
    provides that a warrant "may authorize the seizure of electronic
    storage media or the seizure or copying of electronically stored
    information. Unless otherwise specified, the warrant authorizes
    a later review of the media or information consistent with the
    warrant." Fed. R. Crim. P. 41(e)(2)(B).
    - 7 -
    Aboshady      argues    that     the     government      impermissibly
    interpreted the provision in Section III that gives the government
    "authorization to seize records relating to the identity of the
    operators of the relevant email accounts" to mean "that every email
    in Dr. Aboshady’s account falls within the terms of the warrant."
    (First    emphasis        added).      Aboshady        asserts     that       such    an
    interpretation      is     implausible,       because      it   would     allow      the
    government     to   search     and    seize    every       email   (including        any
    attachments to it) that was sent or received from the email
    address, "tifaaboshady@gmail.com," just by virtue of the fact that
    the email had been sent to or received by that email address.
    Aboshady asserts that such a broad interpretation of the
    warrant   would      conflict       with    both     the    "Fourth     Amendment's
    particularity       and     reasonableness          requirements"       and     "[t]he
    structure of the warrant." As to that latter contention, he points
    to the fact that the warrant contains distinct sections -- namely,
    Section II and Section III -- and argues that, when this feature
    of the warrant is "combined with the different categories listed
    in the separate sections of the warrant," the warrant clearly
    "implies that the set of data described in Section III of the
    warrant is more restricted than the universe of [S]ection II."
    Aboshady then proceeds to describe, albeit briefly, "[t]he non-
    seizable documents retained by the government" pursuant to what he
    contends was its impermissible interpretation of Section III to
    - 8 -
    "include email communications between Dr. Aboshady and his wife,
    sensitive financial and medical information, and numerous personal
    and sensitive photographs.       Examples include emails Dr. Aboshady
    wrote to his family members updating them on the progress of his
    wife's labor, accompanied by photographs of his wife in the
    delivery room."
    As far as we are aware, the government continues to hold
    all of the data contained in the database and thus the electronic
    documents that contain the personal information that Aboshady
    specifically contends that the government impermissibly retained
    pursuant     to   what   he   asserts     is    its   flagrantly    overbroad
    construction of the word "identity" in Section III.                   It also
    appears that the government intends to keep the entirety of that
    data until the end of Aboshady's criminal appeals.
    Nothing in Section III or anything else in the warrant,
    however, sets forth a time limit on the retention of the data that
    Section II    plainly    authorized     the    government   to   acquire   from
    Google, Inc.      And, given the absence of any such time limit, we do
    not see why it would be unreasonable to interpret the warrant to
    permit the government to retain that data until the appeals are
    completed, see United States v. Ramirez, 
    523 U.S. 65
    , 71 (1998)
    (describing how the "touchstone of reasonableness . . . governs
    the method of execution of the warrant"), let alone why it would
    be so unreasonable to so construe it that suppression would be
    - 9 -
    required here.   See United States v. Ganias, 
    824 F.3d 199
    , 213-15
    (2d Cir. 2016) (en banc) ("[I]n assessing the reasonableness, for
    Fourth Amendment purposes, . . . [p]reservation of the original
    medium or a complete mirror may therefore be necessary in order to
    safeguard the integrity of evidence that has been lawfully obtained
    or to authenticate it at trial."); 
    id. at 215
    ("Retention of the
    original storage medium or its mirror may also be necessary to
    afford criminal defendants access to that medium . . . so that
    . . .   they may challenge the authenticity or reliability of
    evidence allegedly retrieved."); United States v. Ulbricht, 
    858 F.3d 71
    , 99–100 (2d Cir. 2017) (noting that due to the "nature of
    digital storage, it is not always feasible to extract and segregate
    responsive data from non-responsive data" (internal quotation
    marks and citation omitted)).   The pre-digital age precedents that
    Aboshady points to in arguing otherwise, moreover, are not to the
    contrary.   See Andresen v. Maryland, 
    427 U.S. 463
    , 482 n.11 (1976)
    (discussing the return of non-responsive documents in the pre-
    digital era); United States v. Tamura, 
    694 F.2d 591
    , 595-97 (9th
    Cir. 1982) (same); United States v. Abrams, 
    615 F.2d 541
    , 543 (1st
    Cir. 1980) (describing how the warrant at issue failed to meet the
    requirement of particularly when it did not provide a limitation
    as to what records could be seized).
    To the extent that Aboshady means to argue that the
    government's execution of the warrant flagrantly violated its
    - 10 -
    terms because the government not only retained the data that it
    had acquired from Google, Inc. pursuant to Section II of the
    warrant but also may have run searches on that data for years
    afterwards "as it developed new theories" of his possible criminal
    liability, we also are not persuaded.   An "unreasonable delay" in
    conducting a search that had been authorized by a warrant could
    "result[] in the lapse of probable cause," United States v.
    Syphers, 
    426 F.3d 461
    , 469 (1st Cir. 2005) (quoting United States
    v. Marin-Buitrago, 
    734 F.2d 889
    , 894 (2d Cir. 1984)),3 but there
    is no evidence in the record here that suffices to show that
    probable cause had lapsed at the time that any particular search
    of the data may have been conducted, see United States v. Arnott,
    
    758 F.3d 40
    , 45 n.6 (1st Cir. 2014) (noting that when an argument
    3 The Syphers court pointed to two district court decisions
    where the government continued to do searches on seized electronic
    data for many months after first executing the warrant but where
    the courts found that such a period of time was not unreasonable.
    First, in United States v. Gorrell, 
    360 F. Supp. 2d 48
    , 55 n.5
    (D.D.C. 2004), there was a ten-month delay in processing the seized
    computer and camera, but the court found that "[t]he warrant did
    not limit the amount of time in which the government was required
    to complete its off-site forensic analysis of the seized items and
    the courts have not imposed such a prophylactic constraint on law
    enforcement."   And, in United States v. Triumph Capital Group,
    Inc., 
    211 F.R.D. 31
    , 66 (D. Conn. 2002), the court found that
    "computer searches are not, and cannot be subject to any rigid
    time limit because they may involve much more information than an
    ordinary document search, more preparation and a greater degree of
    care in their execution."
    - 11 -
    "lack[s] . . . specificity, any claim of error relating to the
    statements may well be waived").4
    That leaves Aboshady's apparent contention that the
    flagrant violation in the execution of the warrant inheres in the
    government's impermissible search and seizure of the particular
    electronic documents that contained the very personal information
    that he describes the government as having acquired from Google,
    Inc. pursuant to Section II of the warrant but that he contends
    that Section III of the warrant, properly read, did not then permit
    the government to search or seize. Aboshady premises this argument
    on the contention that the reference in Section III to "identity"
    does not provide the government with authorization to search or
    seize emails that Google, Inc. had handed over just based on the
    fact that those emails were associated with Aboshady's email
    account.
    4Aboshady invokes United States v. Wey, 
    256 F. Supp. 3d 355
    (S.D.N.Y. 2017), which held that a search of electronic data was
    "impermissible" because the agents searched "materials already
    sorted out as impertinent two years earlier" based on alternative
    charging theories that were "never presented to a judge," 
    id. at 405-09.
      But, Wey noted that the government appeared to be
    "intentionally taking advantage of its sweeping electronic take to
    look for evidence" that "essentially" supported an "independently
    developed probable cause," 
    id. at 407,
    and there is no basis in
    this record for finding similarly here.
    - 12 -
    There is no basis on this record, however, for concluding
    that the government's search or seizure of the information that
    Aboshady contends falls outside the warrant's scope depends on a
    construction of the reference to "identity" in Section III that
    would   necessarily     encompass      any   email   in    the     data   that   the
    government had acquired from Google, Inc. that had been sent to or
    received from the email address appearing to bear Aboshady's
    surname.    The electronic documents that he identifies as having
    been    encompassed     by   the      government's       supposedly       overbroad
    interpretation of the word "identity" in Section III of the warrant
    included statements and pictures uniquely relevant to Aboshady
    because they were uniquely personal to Aboshady, and only Aboshady.
    This feature of those documents thus demonstrated that it was
    unlikely that anyone but Aboshady would have sent or received the
    emails that contained the statements or pictures and, in that
    respect, as the District Court concluded, helped to demonstrate
    that the email account that was alleged to be Aboshady's was in
    his control, despite his apparent contention to the contrary.                    The
    same could not necessarily be said of every email sent or received
    from that address.
    Moreover,    the   word     "identity"        must    be   given     some
    meaning.    Yet, Aboshady does not explain what meaning he would
    ascribe to that word that would give it some content and yet also
    clearly    preclude   the    search    and     seizure    of     electronic    files
    - 13 -
    that -- in consequence of the especially personal information
    contained in them -- provide evidence that at the time the files
    were sent and received, Aboshady had control over the email address
    to or from which the information had been sent.5   For this reason,
    too, we reject this aspect of his challenge to the denial of his
    motion to suppress.
    In any event, even if we were persuaded by Aboshady's
    argument that the government's execution of the warrant misapplied
    Section III's reference to "identity," Aboshady is not entitled to
    the remedy he seeks — the blanket suppression of all emails seized
    and admitted at trial.   Under our precedent, "[t]he remedy in the
    5 We note that Aboshady supports his contention that "[t]he
    government’s execution of the Gmail warrant was unreasonable -- and
    unconstitutional -- because it made no attempt, at all, to
    'segregate[e] electronic data that is seizable from that which is
    not,'" by quoting from United States v. Comprehensive Drug Testing,
    Inc., 
    621 F.3d 1162
    , 1177 (9th Cir. 2010) (en banc) (per curiam).
    But, the full sentence from Comprehensive Drug Testing from which
    Aboshady partially quotes in this passage states that:         "The
    process of segregating electronic data that is seizable from that
    which is not must not become a vehicle for the government to gain
    access to data which it has no probable cause to collect." 
    Id. Given what
    the record shows about the nature of the electronic
    documents that contain the personal information that Aboshady
    highlights and how the nature of that information bears on the
    identity of the person in control of the email address to which
    that information had been sent or from which that information had
    been received, the mere fact that the government retained that
    information and also may have searched it fails to demonstrate
    that the government made no attempt to segregate the data acquired
    from Google, Inc. that the warrant permitted to be searched and
    seized from the data that the warrant did not.
    - 14 -
    case of a seizure that casts its net too broadly is . . . not
    blanket suppression but partial suppression."                    United States v.
    Falon, 
    959 F.2d 1143
    , 1149 (1st Cir. 1992) (citing United States
    v. Riggs, 
    690 F.2d 298
    , 300 (1st Cir. 1982)).                  If the scope of the
    government's search was too broad, Aboshady would only be entitled
    to suppression of those emails that were introduced at trial and
    that reasonably fell outside the scope of the warrant unless the
    "lawful   and     unlawful    parts     of     the    search    are    inextricably
    intertwined or where the lawful part seems to have been a kind of
    pretext for the unlawful part."           United States v. Young, 
    877 F.2d 1099
    , 1105 (1st Cir. 1989).           Aboshady cannot show either.             What is
    more, Aboshady has not clearly identified which emails that were
    introduced   at    trial     fell     outside   the    scope     of    the    warrant.
    Consequently, even if the government's conduct violated the Fourth
    Amendment, there is nothing in the record to show that any of the
    evidence introduced at trial should have been suppressed.
    III.
    Aboshady's        second    set     of    challenges       focus    on   the
    District Court's instruction to the jury about the inferences that
    it could draw from the fact that one of the staff members of the
    NEPA Cairo office, Joseph Ashraf, was not called to testify.
    Ashraf appeared on the government's initial witness list and was
    referenced by multiple witnesses during the course of trial.                        On
    the eve of trial, Aboshady asked the District Court to give a so-
    - 15 -
    called "missing witness" instruction to inform the jury that it
    was permitted to infer that Ashraf's testimony would have been
    unfavorable to the government.     See First Cir. Pattern Crim. Jury
    Instruction 2.12.     The District Court denied this request, and
    Aboshady has not renewed his request on appeal.
    Instead, Aboshady focuses on the instruction that the
    District   Court   ultimately   gave    —   which   instructed   the   jury
    concerning the inferences that could be drawn from the fact that
    a witness had not been called to testify. Here, too, we find that
    his challenges lack merit.
    Aboshady's trial counsel, in his closing argument to the
    jury, asserted that there was a lack of direct evidence that a co-
    conspirator possessed the requisite criminal intent to be guilty
    of a crime and that Aboshady could not "aid and abet a non-crime."
    His trial counsel then added that the government had been in
    contact with Ashraf and "[t]he Government has this [Immigration
    and Customs Enforcement] parole procedure to bring people into the
    country, but he's not here."           And, further, Aboshady's trial
    counsel stated in his closing argument that there are "[s]ome
    questions that are unanswered because there is this hole in the
    case" and that one of these questions was whether Ashraf and the
    other Cairo-based employees had the requisite intent to conspire
    with Aboshady.
    - 16 -
    Following   these   statements   by   trial   counsel,   the
    District Court, sua sponte, instructed the jury:
    You must also not make any inferences based upon
    any witness who was not called to testify. There is no
    requirement that all participants in a crime be charged
    and prosecuted or tried in one proceeding or that all
    witnesses testify.    Also, other individuals who were
    mentioned frequently during the trial and may have had
    relevant information for your consideration were not
    called as witnesses to testify because they were beyond
    the subpoena power of either party and unavailable as
    witnesses for either the Government or the Defendant.
    Therefore, you should draw no conclusions either for or
    against the Defendant or the Government from the failure
    of such witnesses to appear and testify at this trial.
    Your verdict must be based solely on the evidence
    presented in this Courtroom and in accordance with my
    instructions.
    Aboshady then moved to strike the instruction, which he described
    as "about when a witness is beyond the subpoena power of both
    sides;" "because there was no evidence about subpoena power of
    either side" counsel argued, "it's inappropriate because there was
    no evidence."   The District Court denied the motion to strike the
    instruction.6
    Aboshady argues on appeal that the District Court erred
    in denying the motion to strike because the instruction wrongly
    stated that the jury could "not make any inferences based upon any
    6 We treat as waived for lack of development any challenge to
    the instruction insofar as it relates to any witness other than
    Ashraf. See United States v. Zannino, 
    895 F.2d 1
    , 17 (1st Cir.
    1990)   ("[I]ssues   adverted   to   in  a   perfunctory   manner,
    unaccompanied by some effort at developed argumentation, are
    deemed waived.").
    - 17 -
    witness who were not called to testify."     The parties dispute
    whether Aboshady preserved this challenge below and thus whether
    we review this challenge de novo or only for plain error.   But, we
    may bypass this dispute, because the challenge fails even under
    the de novo standard that Aboshady contends applies.   See United
    States v. Wright, 
    937 F.3d 8
    , 22 (1st Cir. 2019) (explaining that
    for "preserved challenges to jury instructions, we 'consider de
    novo whether an instruction embodied an error of law'" (quoting
    United States v. Ackell, 
    907 F.3d 67
    , 78 (1st Cir. 2018))).
    We have explained before that a party may "highlight" a
    "missing witness[] to argue evidentiary insufficiency."       United
    States v. Jiménez-Torres, 
    435 F.3d 3
    , 12 (1st Cir. 2006).   We have
    further explained that "[w]here the court finds that an uncalled
    witness is clearly favorably disposed toward one of the parties,
    an instruction, if requested, may properly be given that the jury
    may draw an inference favorable to the other party." United States
    v. Johnson, 
    467 F.2d 804
    , 809 (1st Cir. 1972); see also 
    id. at 808
    ("The basis for either argumentative comments or request for
    instructions with regard to an opponent's failure to call a
    knowledgeable witness is . . . that if a party has evidence which
    will illuminate questions in issue and fails to present it, it may
    be inferred that such evidence would be harmful to his case.").
    We have also explained, however, that an "[a]ttorney[]
    may not argue that the jury should draw an inference against an
    - 18 -
    opponent where the opponent does not present witnesses that are
    available to both parties." 
    Jiménez-Torres, 435 F.3d at 12
    (citing
    
    Johnson, 467 F.2d at 808
    ("No inference is permissible, however,
    where . . . the evidence is equally available to either party.")).
    And, in Johnson, we observed that, even if a party cannot subpoena
    a witness or require a witness to testify, the witness could still
    be "available" to that party if favorably disposed to the party,
    such that the witness would testify of the witness's own volition
    were the party to so 
    request. 467 F.2d at 808-09
    ("A witness's
    availability is not to be decided on the basis of his physical
    presence in the court room or his accessibility . . .           by subpoena.
    We hold rather that a witness's . . . availability is to be
    determined on the basis of his disposition and relationship toward
    the parties.").
    Here,   in    denying     Aboshady's   request    for      a    missing
    witness instruction before trial, the District Court specifically
    found that it was "satisfied with the government[']s explanation
    of Mr. Ashraf[']s unwillingness to come to the United States to
    testify at trial," such that "a missing witness instruction will
    not be given."    Moreover, Aboshady develops no argument that the
    explanation provided to the District Court reveals that either
    Ashraf's reason for being unwilling to come to testify or that the
    government's   reason   for   not    calling   him   had   to   do       with   any
    hostility to or disagreement on his part with the government's
    - 19 -
    case against Aboshady.     Nor does Aboshady dispute that neither he
    nor the government had the power to compel Ashraf to testify at
    trial, as he does not dispute that neither party had the authority
    to subpoena a foreign national located in a foreign country.          See
    Fed. R. Crim. P. 17(e)(2); 28 U.S.C. § 1783; United States v.
    Theresius Filippi, 
    918 F.2d 244
    , 246 n.2 (1st Cir. 1990) ("The
    United States has no subpoena power over a foreign national in a
    foreign country.").     Thus, because Aboshady fails to develop any
    argument as to how, notwithstanding these aspects of the record,
    he can meet the Johnson standard with respect to whether Ashraf
    was "available" to the government, see 
    Jiménez-Torres, 435 F.3d at 12
    ; 
    Johnson, 467 F.2d at 808
    -809, we see no basis for finding error
    in the District Court's "no inference" instruction.
    Insofar as Aboshady means to challenge the District
    Court's instruction on the separate ground that it impermissibly
    shifted    the   prosecution's   burden    by   "improperly   nullif[ing]"
    defense counsel's argument that the government had failed to meet
    its burden of proof, this argument also fails.           The instruction
    merely told the jury not to make any inference as to why the
    government did not call the witness.        It did not instruct the jury
    not to consider the lack of testimony from Ashraf and other Cairo
    employees in deciding whether the government had met its burden to
    prove Aboshady's guilt beyond a reasonable doubt on any of the
    charges.    Moreover, "[j]ury instructions must be read as a whole,
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    not in some sort of splendid isolation," and the District Court
    separately instructed the jury that the prosecution retained the
    burden of proof.   United States v. Goris, 
    876 F.3d 40
    , 48 (1st
    Cir. 2017); see Richardson v. Marsh, 
    481 U.S. 200
    , 206 (1987)
    (noting "the almost invariable assumption of the law that jurors
    follow their instructions"); United States v. Diaz-Diaz, 
    433 F.3d 128
    , 135 (1st Cir. 2005) (finding that although the prosecutors'
    statement to the jury impermissibly shifted the burden of proof to
    the defense, the remark was effectively addressed by the judge's
    prompt instruction "to the jury that the burden of proof remained
    with the government").
    Finally, Aboshady challenges the instruction because he
    contends that it added a fact not in evidence by stating that
    certain witnesses did not testify "because" they were beyond the
    parties' subpoena power.    A federal district court judge can
    "comment on the facts and evidence," but if, in doing so, a judge
    adds a fact not in evidence, then the judge has "exceed[ed] the
    limitations on his power to comment."   United States v. Paiva, 
    892 F.2d 148
    , 159 (1st Cir. 1989).   The question then becomes whether
    any such error was nonetheless harmless beyond a reasonable doubt.
    See Chapman v. California, 
    386 U.S. 18
    , 24 (1967); see also 
    Paiva, 892 F.2d at 159
    .
    Aboshady contends that, by instructing the jury that the
    witnesses had not testified "because they were beyond the subpoena
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    power of either party and unavailable as witnesses," (emphasis
    added), the District Court necessarily implied that Ashraf would
    not appear as a witness at the trial of his own volition even
    though     no   evidence      had    been      introduced    to     support       that
    determination.        But,    even    assuming     that   construction       of   the
    instruction is a tenable one, any error was harmless beyond a
    reasonable doubt on this record.
    Aboshady's       assertion      that   the    instruction       was    not
    harmless    depends    on    his    contention     that   the     wording    of   the
    instruction     effectively        precluded    the   jury   from    drawing      the
    inference from Ashraf's nonappearance that he would have testified
    in Aboshady's favor.          But, as we have explained, Aboshady has
    failed to make the case that the District Court, on this record,
    erred in instructing the jury not to draw that precise inference.
    Accordingly, we do not see how the instruction may be understood
    to have caused Aboshady any harm.              See 
    Paiva, 892 F.2d at 159
    .
    IV.
    For the reasons stated, we affirm Aboshady's conviction.
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