United States v. Svirskiy ( 2021 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 19-1471
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    ALLA V. STEPANETS,
    Defendant, Appellant.
    No. 19-1595
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    GENE SVIRSKIY,
    Defendant, Appellant.
    No. 19-1600
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    CHRISTOPHER M. LEARY,
    Defendant, Appellant.
    APPEALS FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. Richard G. Stearns, U.S. District Judge]
    Before
    Thompson, Selya, and Barron,
    Circuit Judges.
    John H. Cunha, Jr., with whom Helen Holcomb, Charles Allan
    Hope, and Cunha & Holcomb, P.C. were on brief, for appellant Alla
    V. Stepanets.
    Christopher M. Iaquinto, with whom Jeremy M. Sternberg,
    Zachary D. Reisch, and Holland & Knight LLP were on brief, for
    appellant Gene Svirskiy.
    Paul V. Kelly, with whom Sarah W. Walsh and Jackson Lewis,
    P.C. were on brief, for appellant Christopher M. Leary.
    Ross B. Goldman, Criminal Division, Appellate Section, United
    States Department of Justice, with whom Andrew E. Lelling, United
    States Attorney, Amanda P.M. Strachan, Assistant United States
    Attorney, Donald C. Lockhart, Assistant United States Attorney,
    Brian A. Benczkowski, Assistant Attorney General, and John P.
    Cronan, Deputy Assistant Attorney General, were on brief, for
    appellee.
    February 26, 2021
    BARRON, Circuit Judge.        These consolidated appeals, like
    the appeals in United States v. Cadden, 
    965 F.3d 1
     (1st Cir. 2020),
    and United States v. Chin, 
    965 F.3d 41
     (1st Cir. 2020), trace back
    to tragic events that occurred in the fall of 2012.                   See Cadden,
    965 F.3d at 6-7.       Around that time, patients across the country
    began falling seriously ill after having been injected with a
    contaminated medication compounded by the New England Compounding
    Center ("NECC"), a pharmacy that operated out of Framingham,
    Massachusetts.      See id.        Many of these patients eventually died,
    and a federal investigation, including a criminal one, ensued.
    See id.
    The defendants here -- Alla Stepanets, Gene Svirskiy,
    and Christopher Leary -- are, like the defendants in Cadden and
    Chin, former NECC employees.              However, unlike the defendants in
    those cases, these three defendants are not accused of playing any
    role in compounding the medication alleged to have caused the
    patient illnesses and deaths.                Cf. Cadden, 965 F.3d at 6-7.
    Rather, they each were tried and convicted for a number of federal
    offenses that relate to other aspects of NECC's operations but
    that   were    identified     in    the    course   of   the    federal    criminal
    investigation      spurred    by     the    nationwide     outbreak       that   was
    ultimately attributed to NECC's medication.                    The defendants now
    appeal each of those convictions and, in Stepanets's case, her
    sentence as well.      We affirm.
    - 3 -
    I.
    For a more detailed recitation of the background to the
    federal criminal investigation into the nationwide outbreak itself
    and to NECC's operations, we refer the reader to our opinion in
    Cadden.   See id. at 6-7.   For present purposes, we focus initially
    on the travel of these three appeals, reserving a more detailed
    recounting of the facts that are relevant to each of them to our
    consideration of the specific challenges raised by each appellant.
    Suffice it to say for now that NECC was a compounding
    pharmacy, which combined drugs with other substances to create
    specialized medications for patient use, see Chin, 965 F.3d at 45,
    and that Stepanets, Svirskiy, and Leary were NECC pharmacists who
    were each engaged in different parts of the company's operations.
    In December of 2014, a grand jury in the District of Massachusetts
    returned a 131-count indictment that charged each of them -- as
    well as Barry Cadden, NECC's founder and president; Glenn Chin,
    NECC's supervising pharmacist; and nine others affiliated with
    NECC -- with committing a range of federal offenses.
    The trials of Cadden, Chin, and several other defendants
    were severed, and a number of the other defendants pleaded guilty.
    The three appellants, however, went to trial in October of 2018
    along with three of their co-defendants.
    The trial lasted ten-and-a-half weeks.    The jury found
    Stepanets, Svirskiy, and Leary each guilty of committing multiple
    - 4 -
    federal crimes.      They each now appeal their convictions and, in
    the case of Stepanets, with whose challenges we begin, her sentence
    as well.
    II.
    Stepanets    was    charged       in    the    indictment     with    the
    following federal crimes:         racketeering conspiracy, see 
    18 U.S.C. § 1962
    (d), conspiracy to defraud the United States, see 
    id.
     § 371,
    and   seven   counts     in     connection         with    the    introduction     of
    "misbranded" drugs into interstate commerce with the intent to
    defraud and mislead in violation of the Federal Food, Drug, and
    Cosmetic    Act   ("FDCA"),      see   
    21 U.S.C. §§ 353
    (b)(1),       331(a),
    333(a)(2). The jury found Stepanets not guilty of the racketeering
    conspiracy and conspiracy to defraud counts.                     She was convicted,
    however, on six of the seven FDCA counts.                  Her appeal focuses on
    those six convictions.
    We begin by describing the counts that underlie those
    convictions   more     fully,    as    well    as    the    relevant     procedural
    background to Stepanets's challenges to those convictions.                        We
    then consider each of her challenges to her convictions on those
    six counts, as well as her challenge to the sentence that she
    received.
    A.
    The   FDCA   criminalizes,         among      other     things,    "[t]he
    following acts and the causing thereof . . . :                     The introduction
    - 5 -
    or delivery for introduction into interstate commerce of any . . .
    drug . . .      that    is . . .      misbranded."           
    Id.
       § 331.     Various
    provisions of the FDCA then describe the ways in which a drug can
    be deemed "misbranded."
    The    drugs       at    issue    in    Stepanets's     convictions      were
    alleged to be "misbranded" under § 353(b)(1).                        That subsection
    provides that "[t]he act of dispensing a drug" meeting certain
    criteria without a written or oral prescription by a licensed
    practitioner "shall be deemed to be an act which results in the
    drug being misbranded while held for sale."                   Id. § 353(b)(1).
    Thus, the government's theory as to why the medications
    in the shipments at issue in the six counts were "misbranded"
    within the meaning of the FDCA was that they were "dispensed" for
    patient use without a valid prescription.                   See id.    In support of
    that charge, the indictment alleged that the medications at issue
    were    dispensed        for       patient        use     pursuant    to     fictional
    prescriptions,        given    the    evidence      linking    the    medications     to
    prescriptions for patients like "Wonder Woman" and "Bud Weiser."
    In the fall of 2015, Stepanets and two other defendants
    filed motions to dismiss the FDCA counts in the indictment.                         See
    United States v. Stepanets, 
    879 F.3d 367
    , 371 (1st Cir. 2018).
    They   argued    in    those       motions,       among   other    things,   that    the
    indictment did not fairly allege the "dispensing" element of the
    misbranding offense.           See 
    id.
    - 6 -
    In seeking the counts' dismissal, the motions argued
    that the dispensing element required the government to have alleged
    in the indictment that the defendants had engaged in conduct that
    amounted to them personally having dispensed the drugs at issue,
    even though there was no valid prescription for those drugs.                       The
    motions contended that the indictment included no such allegation,
    because it merely alleged that the defendants "worked in the
    packing area [of NECC] checking orders prior to shipment," which,
    if true, the motions further asserted, would make them "shipping
    clerk[s]" and not dispensers.
    The District Court granted the motions to dismiss.                       See
    
    id.
       In explaining why, the District Court relied on a dictionary
    definition     of    the   word    "dispensing"       according   to       which    "a
    pharmacist dispenses a drug when she acts in her role as a licensed
    professional        authorized     to   fill    (put    together)      a    medical
    prescription for delivery to a patient."               
    Id.
       The District Court
    then concluded that the indictment alleged that the defendants had
    engaged   in    conduct     that    was    at   most    "incidental"        to     the
    "dispensing" of the drugs at issue.             
    Id.
    We reversed that ruling on an interlocutory appeal.                      See
    id. at 376.     We explained that "the allegations in the indictment
    [were] sufficient to apprise the defendant[s] of the charged
    offense[,]" because the allegations specified and connected the
    relevant statutory provisions, elements, and facts.                    Id. at 372
    - 7 -
    (quoting United States v. Savarese, 
    686 F.3d 1
    , 7 (1st Cir. 2012)).
    We further explained that, contrary to the defendants' contention,
    nothing in the indictment committed the government to the view
    that the defendants could be convicted of the offense even if they
    were mere shipping clerks.    See id. at 374.    We thus explained
    that the issue of whether the dispensing element ultimately could
    be met was a question of fact to "be resolved at trial rather than
    on pretrial motions to dismiss."      Id.
    The case then proceeded to trial, at which the jury found
    Stepanets guilty of the six FDCA counts at issue here.     The jury
    did not find that Stepanets acted with an intent to defraud or
    mislead on any of these counts, which is a finding that, had it
    been made, would have increased her maximum sentence beyond the
    one-year term of imprisonment.     See 
    21 U.S.C. § 333
    (a)(2).   The
    District Court sentenced Stepanets to twelve months' probation on
    each of the counts of conviction, to be served concurrently with
    one another.
    B.
    1.
    Stepanets's lead challenge to her convictions takes aim
    at what she contends was a lack of sufficient evidence concerning
    the dispensing element.    Our review is de novo, and we construe
    the evidence in the light most favorable to the verdict.    Cadden,
    965 F.3d at 10.   We may reverse her convictions on this basis only
    - 8 -
    if we conclude that, reading the record as a whole in that light,
    no rational jury could have found that the government proved the
    dispensing element beyond a reasonable doubt.                 See id.
    The statute does not define "dispensing," as used in
    § 353(b)(1).     See Stepanets, 879 F.3d at 369.              But, according to
    Stepanets, we held in the interlocutory appeal from the District
    Court's     dismissal   of   these     counts     in    the    indictment         that
    "dispensing"    involves     "the   kind    of   checking      that     pharmacists
    regularly do when filling prescriptions, i.e., confirming that
    legit prescriptions triggered the drug shipments."                     Id. at 374.
    She then contends that, under that definition of "dispensing," the
    evidence does not suffice to show that she, personally, "dispensed"
    any of the purportedly misbranded medications.                 Accordingly, she
    contends, her convictions must be reversed for lack of sufficient
    evidence.
    A   necessary    premise   of    this      challenge      is   that    the
    government needed to prove not only that the drugs at issue had
    been dispensed by someone before Stepanets caused them to be
    introduced or delivered into interstate commerce but also that she
    personally was the one who dispensed them.              It is not clear to us,
    however, that this premise is right.
    The FDCA provides by its plain terms that to prove that
    this type of misbranding-based offense has been committed by the
    defendant, the government needs to show only that the drugs at
    - 9 -
    issue   had    been    "dispensed" --       such   that    they    qualified    as
    "misbranded" --       and   that    the     defendant     then    undertook    the
    prohibited acts of "causing . . . [t]he introduction or delivery
    for introduction into interstate commerce of any" such drug.                    
    21 U.S.C. § 331
    .         That text is not naturally read to equate the
    introduction    or    delivery     of    misbranded     drugs    into   interstate
    commerce -- or the causing of their introduction or delivery into
    such commerce -- with their dispensing, because "dispensing" is a
    predicate for deeming a drug to be "misbranded."1
    1We note that the District Court instructed the jury
    that the government needed to "prove[] . . . beyond a reasonable
    doubt" that Stepanets "caused the introduction of drugs or caused
    the delivery of them for introduction into interstate commerce"
    and "that the drugs were dispensed without a valid prescription."
    The District Court did not in doing so instruct the jury that it
    needed to find that Stepanets had dispensed the drugs herself to
    find her guilty of the offense, although the District Court did
    later tell the jury to proceed to a determination of Stepanets's
    intent, if it were to find her "guilty of dispensing a drug in
    interstate commerce," in the course of distinguishing the counts
    on which Stepanets had been charged from those of her co-
    defendants. We note, too, that the indictment charges Stepanets
    with the "Introduction of Misbranded Drugs into Interstate
    Commerce," and alleges that Stepanets "caused" "the drugs" "to be
    dispensed" rather than that she dispensed them herself.          In
    addition, in our earlier opinion reversing the dismissal of her
    indictment, we focused on whether the indictment adequately
    alleged "that each defendant-pharmacist performed NECC-assigned
    tasks that caused misbranded drugs to be introduced into interstate
    commerce," not whether it adequately alleged that each of them
    personally dispensed those drugs herself. Stepanets, 879 F.3d at
    375.
    - 10 -
    But,   we need not question that premise here.                    The
    government does not challenge it and, even if we accept it,
    Stepanets's sufficiency challenge fails.
    Stepanets does not dispute that the evidence suffices to
    show that she was what she refers to as a "checker" of the orders
    for the drugs at issue in each of the six counts.                      But, she
    contends,   the    evidence    suffices   to   show     only   that,   in    that
    capacity, she was responsible merely for verifying that each
    package contained the correct medication and bore the correct
    address.    She contends that the evidence does not suffice to show
    that she also was responsible for ensuring that the drugs at issue
    were   to   be    provided    for   patient    use    pursuant   to    a    valid
    prescription.
    Stepanets points in support of this contention to the
    fact that the evidence supportably shows that she filled out a
    "Pharmacist's Rx Order Verification Sheet" ("Verification Sheet")
    for each shipment and not a "Prescription Order Form."                        She
    contends that this point is significant because the Verification
    Sheet required that she, by her checkmarks and signature, verify
    only the customer facility's name and address, as well as the
    medication, vial size, number of units, lot number, and -- where
    applicable -- the enclosed lab report.               Stepanets stresses that
    nothing on the Verification Sheet required her to look at NECC's
    Prescription Order Form, which, unlike the Verification Sheet, did
    - 11 -
    contain the fictitious patient names referenced in the indictment.
    Instead, the Verification Sheet referenced information that was
    printed on the invoice and label attached to the package containing
    each shipment.
    Thus, Stepanets argues, the record does not suffice to
    permit a rational trier of fact to find that she was responsible
    for carrying out the distinct task of verifying the prescription
    and patient names.      She contends that the record makes clear that
    this   task    was   exclusively   the   responsibility   of   those   NECC
    employees who, unlike herself, were responsible for what she refers
    to as "confirming" the orders for the drugs in the six shipments,
    as they alone were responsible for completing the Prescription
    Order Forms.
    We agree with Stepanets that there is no evidence in the
    record that she was responsible for completing a Prescription Order
    Form rather than a Verification Sheet for the six shipments at
    issue.   Nor does the government contend otherwise to us.              But,
    that does not mean that a reasonable jury could not find on this
    record that, as certainly would befit a licensed pharmacist, the
    parameters of her role as to the shipments at issue encompassed
    the task of ensuring that the drugs were associated with a valid
    prescription for a real patient.
    William Frisch, an employee of the Massachusetts Board
    of Registration of Pharmacy, testified that the "final pharmacist
    - 12 -
    verification check also required to check that the drug is based
    on a prescription," (emphasis added), and the evidence in the
    record supportably shows that Stepanets did have at least access
    to the Prescription Order Forms that NECC collected in customer
    folders.    There is also testimony about Stepanets's role from two
    NECC employees responsible for sales, Mario Giamei and Kenneth
    Boneau.    They testified that Stepanets was among the employees who
    followed up about requests from customers for shipments in which
    the requests had "issues with patient names" and who instructed
    Giamei and Boneau "to get a real name" or "more patient names"
    from their customers in placing orders for those shipments. Giamei
    and Boneau at no point indicated that Stepanets took on that role
    only as to requests for shipments for which she had not been asked
    to fill out a Verification Sheet.
    True, none of this evidence expressly concerns one of
    the six shipments at issue.      But, significantly, the record does
    contain evidence of an email chain from May 12, 2011, in which
    Stepanets alerted salesperson John Notarianni of "patient name
    issues" with respect to shipments requested by Hill Country Sports
    Medicine in San Marcos, Texas.        That email chain further shows
    that Stepanets brought two names to Notarianni's attention --
    "Donald Trump" and "Jennifer Lopez."          And, the record supportably
    shows,    those   two   distinctive   names    were   the   names   on   the
    Prescription Order Form for the shipment on May 3, 2011, which is
    - 13 -
    the shipment underlying the sixth count of which the jury convicted
    Stepanets and for which the evidence shows that she filled out
    only the Verification Sheet.
    Thus, in light of this evidence, circumstantial though
    it is, a reasonable juror could have found that Stepanets's role
    at NECC went beyond that of a mere shipping clerk as to the drugs
    at issue, even if she filled out only the Verification Sheet for
    each of those shipments.      Such a juror could have found that her
    role encompassed with respect to all six shipments "the kind of
    checking that pharmacists regularly do when filling prescriptions,
    i.e.,   confirming   that   legit    prescriptions     triggered   the   drug
    shipments."    Stepanets, 879 F.3d at 374; see also Cadden, 965 F.3d
    at 11 (relying on sufficient circumstantial evidence to support an
    inference); United States v. Ridolfi, 
    768 F.3d 57
    , 61 (1st Cir.
    2014) (noting that a juror may make "reasonable, common sense
    inferences drawn from the evidence"). For that reason, this aspect
    of Stepanets's sufficiency challenge fails.
    2.
    Stepanets   also mounts         a   closely related sufficiency
    challenge.    She contends that, regardless of what the record shows
    about her particular role vis-à-vis ensuring that the drugs at
    issue were associated with prescriptions for real patients, the
    evidence does not suffice to show that the drugs at issue were
    dispensed at all -- that is, by anyone at NECC and not just by her
    - 14 -
    personally.       According      to    Stepanets,       "dispensing"       requires
    delivering the drugs to patients.               Yet, she contends, the six
    orders at issue were sent to medical facilities rather than to the
    patients themselves.       Again, our review is de novo.                See Cadden,
    965 F.3d at 10.      Again, we find no merit to the challenge.
    Nothing in the statute supports the notion that only
    those who deliver misbranded drugs directly to patients -- without
    any   intermediaries --     "dispense"         such    drugs    under    
    21 U.S.C. § 353
    (b)(1).   See United States v. Ikejiani, 
    630 F. App'x 933
    , 937
    (11th Cir. 2015) (holding in the context of a 
    21 U.S.C. § 331
    (k)
    prosecution that "the term 'dispensing,' as used in § 353(b)(1),
    applies to all sales, including wholesale sales, and not merely to
    sales to end users"); De Freese v. United States, 
    270 F.2d 730
    ,
    736 (5th Cir. 1959) (rejecting, again in the context of a § 331(k)
    prosecution, the argument that "dispensing" under § 353(b)(1)
    should be interpreted "to connote retail selling only" because
    "[s]uch an interpretation would not be consistent with the commonly
    accepted   meaning    of   the    term   and     would     be    carving      out   an
    unwarranted exception to the statute"). Nor does Stepanets develop
    any argument that the fictious names were used within NECC merely
    as placeholders for tracking orders from medical facilities, so
    that the facilities could then receive those drugs in bulk for
    office   use   and   dispense     them    pursuant       to     valid    individual
    prescriptions using real patient names.               United States v. Zannino,
    - 15 -
    
    895 F.2d 1
    , 17 (1st Cir. 1990).             We thus reject this challenge to
    her six convictions as well.
    3.
    We     turn,    then,      to   Stepanets's      separate      contention
    that -- even setting aside what the record shows in relation to
    the dispensing element -- her convictions must be reversed under
    the Fifth Amendment to the United States Constitution because the
    underlying offense contained no mens rea element.                         Stepanets
    preserved this contention below, and thus we review it de novo.
    See United States v. Silva, 
    794 F.3d 173
    , 177 (1st Cir. 2015).
    Here, too, however, we are not persuaded.
    In Tart v. Massachusetts, 
    949 F.2d 490
     (1st Cir. 1991),
    we considered the constitutionality under the Fifth Amendment's
    Due Process Clause of "legislative enactments proscribing so-
    called   'public     welfare'     offenses"        without     mens     rea   terms,
    implicitly including 
    21 U.S.C. § 331
    (a) and § 333(a)(1) among
    them.    Tart,     
    949 F.2d at 502
          (relying   on   United    States   v.
    Dotterweich, 
    320 U.S. 277
     (1943), which characterized predecessor
    versions of these provisions as "a now familiar type of legislation
    whereby penalties serve as effective means of regulation" and
    explained that "[s]uch legislation dispenses with the conventional
    requirement for criminal conduct -- awareness of some wrongdoing,"
    see 
    id. at 280-81
    ).       We explained that, given the nature of such
    public welfare offenses, "[t]he elimination of th[e mens rea]
    - 16 -
    element    [in them]    is . . . not violative of the due process
    clause."    Id. at 502 (quoting Holdridge v. United States, 
    282 F.2d 302
    , 310 (8th Cir. 1960)).
    Thus, Tart refutes the notion that due process requires
    there to be a mens rea element in an offense as a categorical
    matter.     Accordingly, Tart necessarily refutes Stepanets's due
    process challenge to her convictions insofar as it is premised on
    that categorical notion.
    For similar reasons, her Eighth Amendment-based variant
    of this categorical challenge to mens rea-less crimes, which was
    not preserved and so is subject only to plain error review, see
    United States v. Sirois, 
    898 F.3d 134
    , 136 (1st Cir. 2018), also
    fails.     Stepanets relies here only on Graham v. Florida, 
    560 U.S. 48
    , 71 (2010).     But, the Supreme Court did not address in that
    case whether the Eighth Amendment requires an offense -- as a
    categorical matter -- to include a mens rea element, even if the
    Fifth and Fourteenth Amendments do not.        Nor are we aware of any
    authority that would support such a categorical position.
    Stepanets   does   make   the   additional   argument   that,
    despite Tart, the penalty she faced under the FDCA -- imprisonment
    of up to one year -- and the prospect of her losing her state
    pharmacist license precluded this offense from omitting a mens rea
    element and comporting with the Fifth Amendment's Due Process
    Clause.     She relies for this contention on Morissette v. United
    - 17 -
    States, 
    342 U.S. 246
     (1952), which states that public welfare
    offenses that lack a mens rea element commonly impose "penalties
    [that] are relatively small, and [for which] conviction does no
    grave damage to an offender's reputation."     
    Id. at 256
    .
    Here, too, our review is de novo, see Silva, 794 F.3d at
    177, and here, too, Tart appears to stand in Stepanets's way.     Tart
    relied on Morissette to describe the universe of public welfare
    offenses that could permissibly omit a mens rea element, yet
    Morissette expressly included in that universe the predecessor
    FDCA offenses to those at issue here, which themselves lacked a
    mens rea element and imposed a maximum prison sentence of one year.
    See Tart, 
    949 F.2d at
    501-02 (citing Morissette, 
    342 U.S. at
    250-
    51); Morissette, 
    342 U.S. at 259-60
     (quoting Dotterweich, 
    320 U.S. at 280-81
     (discussing FDCA provisions 
    21 U.S.C. §§ 301
    (a), 303
    (1938), which are the predecessor versions of 
    21 U.S.C. §§ 331
    (a),
    333(a) at issue here)).
    Moreover, insofar as Stepanets means to suggest that
    Tart does not decide the question -- perhaps because the actual
    offense at issue there was for landing raw fish without a permit,
    see Tart, 
    949 F.2d at
    502 -- her argument still fails.        And that
    is because Morissette itself does not support it.
    Morissette   addressed   how   a   court   should   determine
    whether a statute impliedly contains a mens rea element that it
    does not expressly set forth.       Morissette, 
    342 U.S. at 252
    .
    - 18 -
    Morissette did not purport to hold that all convictions for
    offenses that both lack a mens rea element and impose a maximum
    punishment of imprisonment for one year violate due process.
    Indeed, Dotterweich, which predates Morissette, explained that an
    earlier version of the misbranding offense at issue here, which
    carried   the    same   penalty,   was      a   public   welfare    offense   and
    therefore properly construed not to include a mens rea element.
    See Dotterweich, 
    320 U.S. at 281
     (explaining that the provision
    "dispenses      with    the   conventional       requirement       for   criminal
    conduct -- awareness of some wrongdoing").               Thus, we reject this
    variant of her due process challenge as well.
    4.
    Stepanets's final challenge to her convictions asserts
    that, even if the misbranding offense at issue here permissibly
    omits a mens rea element, it still must be construed to require
    the government to prove that she at least had "a responsible share
    in the furtherance of the transaction which the statute outlaws."
    United    States   v.    Park,   
    421 U.S. 658
    ,    669   (1975)    (quoting
    Dotterweich, 
    320 U.S. at 284
    ).           Yet, she contends, the evidence
    did not suffice to show that she had such a share with respect to
    the shipments of the misbranded medications that are at issue.
    The District Court rejected this contention, because it
    held that the two cases on which Stepanets chiefly relies for
    it -- Dotterweich and Park -- make clear that the government need
    - 19 -
    prove     that   a    defendant     had    a     responsible      share        only    if    the
    defendant did not personally engage in the proscribed criminal
    conduct and instead merely oversaw the operations of the company
    that produced and distributed the drugs at issue, as, for example,
    a chief executive officer of a large pharmaceutical company might.
    See United States v. Stepanets, 
    362 F. Supp. 3d 22
    , 24 (D. Mass.
    2019); see also Park, 
    421 U.S. at 670-71
    .                          Arguably, however,
    Dotterweich and Park do accord with Stepanets's contention that
    the responsible share requirement is not limited to the class of
    cases identified by the District Court.
    For example, in Dotterweich, which upheld the conviction
    of    a   corporate     officer      under       earlier    versions       of     the       FDCA
    provisions at issue here, 
    21 U.S.C. § 331
    (a) and § 333(a)(1), the
    Court     rejected      the     defendant's        contention           that     
    21 U.S.C. § 333
    (a)(1)'s        reference      to    "any    person"     encompasses         only       the
    corporation      that    produces        or     distributes       the    adulterated          or
    misbranded drugs or to the sole proprietor of such a business and
    not to the individual employees of such a corporation, insofar as
    it is not a sole proprietorship.                   Dotterweich, 
    320 U.S. at
    281-
    82.       And,   in     doing    so,      the    Court     explained       in     seemingly
    encompassing terms that "any person" punishable for such conduct
    refers     not   only    to   the    corporation         itself    but     also       to    "the
    individual agents of the corporation" who "share[] responsibility
    - 20 -
    in the business process resulting in unlawful distribution."            
    Id. at 282, 284
    .
    Moreover, in Park, the Court stated that in the corporate
    context "individuals other than proprietors are [also] subject to
    the criminal provisions of the [FDCA]" as long as they "'have . . .
    a responsible share in the furtherance of the transaction which
    the statute outlaws.'"       Park, 
    421 U.S. at 668, 669
     (quoting
    Dotterweich, 
    320 U.S. at 284
    ).     And the Court then elaborated on
    that conclusion by observing -- again, in seemingly encompassing
    terms -- that this limitation on the reach of the offense addressed
    the due process-based concern that "literal enforcement [against
    'any person' as per 
    21 U.S.C. § 333
    (a)(1)] 'might operate too
    harshly by sweeping within its condemnation any person however
    remotely entangled in the proscribed shipment.'"            Id. at 669
    (quoting Dotterweich, 
    320 U.S. at 284
    ).
    But, in any event, Stepanets does not dispute that the
    responsible    share   requirement --    which   she   equates   with    a
    proximate rather than merely but-for cause requirement -- is met
    here if the evidence suffices to show that she personally dispensed
    the medications in the shipments at issue.       Thus, because, for the
    reasons that we have already given, we reject her contention that
    - 21 -
    the evidence does not suffice in that regard, we reject this aspect
    of her challenge as well.2
    C.
    All that remains of Stepanets's challenges on appeal,
    then, is her apparent challenge to her twelve-month probationary
    sentence   on   the   ground   that,    because   the   underlying   offense
    contained no mens rea element, it violates the Eighth Amendment.
    But, Stepanets did not raise this challenge below, and so it is at
    2 Stepanets develops no argument that, even if the
    offense omitted a mens rea requirement, the government still needed
    to show that she acted negligently in causing the misbranded drugs
    to be introduced or delivered into interstate commerce and that
    the evidence did not suffice to allow a reasonable juror to find
    such negligence, though she does cite at one point to the
    concurring opinion in the Eighth Circuit case United States v.
    DeCoster, 
    828 F.3d 626
     (8th Cir. 2016), which reads Park as
    imposing a negligence standard on misdemeanor offenses under the
    FDCA, see id. at 637 (Gruender, J., concurring), because Park
    explained that the FDCA "punishes 'neglect where the law requires
    care, or inaction where it imposes a duty,'" Park, 
    421 U.S. at 671
    (quoting Morissette, 
    342 U.S. at 255
    ).      But, the passage from
    Morissette in Park just quoted refers not only to "neglect" but
    also to "inaction where [the statute] imposes a duty."          
    Id.
    (quoting Morissette, 
    342 U.S. at 255
    ). That quotation therefore
    indicates that there is criminal liability for failing to fulfill
    the statutorily required duty even in the absence of a showing of
    negligence.   
    Id.
       And, consistent with this conclusion, Park's
    immediately preceding quotation of Smith v. California, 
    361 U.S. 147
     (1959), is that "the public interest in the purity of its food
    is so great as to warrant the imposition of the highest standard
    of care on distributors." Park, 
    421 U.S. at 671
     (quoting Smith,
    361 U.S. at 152) (emphasis added).     Smith makes clear that the
    "highest standard of care" to which Park refers is "strict or
    absolute criminal responsibility" rather than negligence. Smith,
    361 U.S. at 150.
    - 22 -
    most subject to review for plain error. See Sirois, 898 F.3d at
    136.
    We conclude that Stepanets has failed to meet that
    demanding standard in pressing this challenge. Her probationary
    sentence is less severe than the prison sentences for strict
    liability crimes that we have held were not cruel and unusual.
    See Tart, 
    949 F.2d at 503-04
    ; McQuoid v. Smith, 
    556 F.2d 595
    , 597
    (1st Cir. 1977).      For that reason, we cannot say that it was "clear
    or obvious" error under the Eighth Amendment, Sirois, 898 F.3d at
    138, for the District Court to impose the sentence that she
    received.
    III.
    We next consider the appeal that Gene Svirskiy, an NECC
    pharmacist in charge of one of NECC's clean rooms, brings.         He was
    indicted for a substantive racketeering offense, see 
    18 U.S.C. § 1962
    (c), predicated on twelve acts of mail fraud, see 
    id.
     § 1341,
    which is a racketeering activity, see id. § 1961(1)(B).          Of those
    twelve acts of racketeering activity, ten were based on NECC's use
    of     Scott    Connolly,   a   pharmacist   technician   who   lacked   a
    registration that was required by Massachusetts law for those
    performing such work, in the clean room that Svirskiy oversaw.
    The remaining two predicate acts of mail fraud were based on
    shipments of medications that NECC sent to customers that either
    were untested or contained expired ingredients in violation of
    - 23 -
    Chapter 797 of the United States Pharmacopeia, which is a set of
    specifications for the compounding of sterile medications that
    Massachusetts requires pharmacists to follow.             See 
    247 Mass. Code Regs. 9.01
    (3); United States Pharmacopeia, General Chapter <797>
    Pharmaceutical         Compounding --     Sterile      Preparations      (2008)
    [hereinafter "USP-797"].
    In addition to the substantive racketeering offense just
    described, Svirskiy was charged with a racketeering conspiracy
    offense, see 
    18 U.S.C. § 1962
    (d).              The racketeering conspiracy
    offense was predicated on unspecified acts of mail fraud.
    Separately, Svirskiy was charged with twelve stand-alone
    mail fraud counts.        See 
    id.
     § 1341.       Each count corresponded to
    one of the twelve predicate acts of mail fraud on which the
    substantive racketeering charge rested.
    Finally, the indictment charged Svirskiy with committing
    a   pair   of   FDCA    violations.      One   count   was   for    introducing
    adulterated drugs into interstate commerce, and one count was for
    introducing misbranded drugs into interstate commerce.                  See 
    21 U.S.C. §§ 351
    (a)(2)(A), 352(a), 331(a), 333(a)(2).
    Svirskiy's case went to trial, and the jury convicted
    him   of   the    following     crimes:        racketeering;       racketeering
    conspiracy; ten of the twelve counts of stand-alone mail fraud,
    based on nine of the ten Connolly-related counts and one additional
    count for shipping expired drugs; and two FDCA violations, both of
    - 24 -
    which, the jury found, he committed with an intent to defraud or
    mislead -- an aggravating factor, see 
    id.
     § 333(a)(2). The special
    verdict form revealed that the jury found, as to the substantive
    racketeering offense, that the government proved the same ten
    racketeering acts of mail fraud that corresponded to the ten stand-
    alone mail fraud counts for which Svirskiy was found guilty.           The
    District Court sentenced Svirskiy to a prison term of thirty months
    and one year of supervised release.
    On appeal, Svirskiy raises various challenges to his
    convictions, most of which focus on whether the evidence sufficed
    to   support   his   convictions.    We   begin   by   focusing   on   his
    sufficiency challenges to his stand-alone mail fraud convictions,
    which, he contends, also require the reversal of his racketeering
    convictions, given their dependence on the same allegations of
    mail fraud as the stand-alone mail fraud convictions.             We then
    turn to his sufficiency challenges to his racketeering-related
    convictions that do not pertain to whether the evidence of mail
    fraud sufficed to support them.      Next, we address his sufficiency
    challenges to his FDCA convictions.         Finally, we address his
    challenge to one of the instructions that the District Court gave
    the jury on the FDCA counts.        We find no merit to any of these
    challenges.
    - 25 -
    A.
    To prove mail fraud, the government needed to show three
    elements:    "(1) a scheme to defraud based on false pretenses; (2)
    [Svirskiy's] knowing and willing participation in the scheme with
    the intent to defraud; and (3) the use of interstate mail . . .
    communications in furtherance of that scheme."      United States v.
    Soto, 
    799 F.3d 68
    , 92 (1st Cir. 2015) (quoting United States v.
    Hebshie, 
    549 F.3d 30
    , 35 (1st Cir. 2008)). Svirskiy first contends
    that the evidence did not suffice to permit a reasonable juror to
    find beyond a reasonable doubt that he committed mail fraud on the
    nine counts for which he was convicted that related to shipments
    of medications compounded by Connolly.       Our review is de novo,
    though we must assess the evidence in the light most favorable to
    the jury verdict.   See United States v. Tanco-Baez, 
    942 F.3d 7
    , 15
    (1st Cir. 2019).
    1.
    The government's theory of mail fraud on the Connolly-
    related, stand-alone counts of mail fraud was that each of the
    customers who received a shipment of compounded medications that
    Connolly helped to prepare had been informed that NECC would only
    use registered technicians, even though Connolly was not one.
    Svirskiy does not dispute that Connolly was involved in preparing
    the medications at issue or that Connolly lacked a registration
    required by Massachusetts law.        Svirskiy also does not dispute
    - 26 -
    that, to the extent a mail fraud scheme existed, he was a knowing
    and willing participant in it.        Svirskiy contends, however, that
    the   evidence    did     not    suffice    to   establish     that   false
    representations about NECC's use of registered technicians were
    ever made to the NECC customers who received the shipments of
    medications that Connolly helped to prepare.            It is on that basis
    that he contends that the evidence does not suffice to support his
    convictions.
    In support of this contention, Svirskiy points out,
    correctly, that none of the NECC customers identified in the
    Connolly-related counts testified that they personally received
    such a representation from NECC.           But, there was testimony from
    others that we conclude sufficed to permit a reasonable juror to
    make the requisite finding.
    Kenneth Boneau, a salesperson for NECC, testified at the
    trial that NECC's sales strategy emphasized that to ensure the
    quality of its compounding operations the company "had pharmacists
    that were making [its] medications, not technicians."           Boneau also
    testified about some of the specific representations NECC made to
    its   customers   about    the   qualifications    of    its   technicians,
    including one that was set forth in a document introduced at trial.
    Boneau described that document, which was labeled with the NECC
    logo on the front page and contained the word "Hospital" there as
    - 27 -
    well, as "material[] that we would bring with us on our sales calls
    to hospitals" and give to customers.
    That      document      contained      a     page       labeled      "Company
    Overview," and it made claims to NECC's customers about its
    "Personnel."          Among    those     claims   was        that   NECC's      personnel
    consisted       of    "Highly      Specialized         and     Extensively        Trained
    Compounding Pharmacists and Certified Technicians."                             (emphasis
    added).
    Svirskiy       makes    no    developed      argument        that    Boneau's
    testimony failed to suffice to permit a reasonable juror to infer
    that those marketing materials were provided to each of the
    customers described in each of the nine Connolly-related mail fraud
    counts of which he was convicted.                 Thus, he makes no developed
    argument that a reasonable juror could not infer that each customer
    identified in those counts received a representation from NECC
    indicating that it would use "Certified Technicians" to compound
    its products.3        Instead, Svirskiy contends only that the evidence
    was insufficient to permit a juror supportably to find that
    Connolly    was      not   a   "Certified    Technician,"           as   the    marketing
    For that reason, Svirskiy's arguments that he had no
    3
    duty to correct a misleading omission about NECC's use of Connolly
    are beside the point. NECC made affirmative representations to
    its   customers  about   the   qualifications   of  its   pharmacy
    technicians, and it is the misleading nature of those
    representations that grounds each of the Connolly-related mail
    fraud convictions.
    - 28 -
    materials represented him to be, and thus that the evidence was
    insufficient to permit a reasonable juror to find that the alleged
    false representation pertaining to Connolly being "registered" had
    been made.
    To make that case, Svirskiy points out that, despite
    working without a state-mandated registration during the relevant
    period, the undisputed evidence in the record shows that Connolly
    did in fact possess a "certification" issued by the national
    Pharmacy Technician Certification Board during the period in which
    he helped to produce each of the shipments.             Svirskiy further
    asserts,   correctly,   that,   although   there   is   no   dispute   that
    Massachusetts law requires pharmacy technicians to be "registered
    by the board of pharmacy," the provision of Massachusetts law that
    imposes that requirement does not use the words "certified" or
    "certification."    Mass. Gen. Laws ch. 112, § 24E.              Thus, he
    contends, the marketing materials that described NECC pharmacist
    "[t]echnicians" as being "[c]ertified" were not a representation
    that they were "registered," as Massachusetts law required them to
    be, thereby precluding them from providing support for finding
    that the alleged false representation to customers had been made.
    The jury instructions were clear, however, that the
    "false or fraudulent pretenses [and] representations" prohibited
    by the mail fraud statute, 
    18 U.S.C. § 1341
    , encompass "half
    truth[s]" and the "concealment of a material fact" -- something
    - 29 -
    that Svirskiy      nowhere challenges.          And, the language of the
    marketing materials, which refers only to "Certified Technicians,"
    gives no indication that the use of the term "Certified" is meant
    only in some technical sense.
    The     marketing       materials    fail      to     specify        what
    certification is required or who must do the certifying.                     Nor does
    Svirskiy point to anything in the record that would suggest that
    either NECC or any of its customers understood "Certified" as used
    in the marketing document in the technical sense that he urges us
    to conclude is the only understanding that a reasonable juror could
    have had of how that word was used.              In fact, the record shows
    that at least one pharmacy technician formerly employed by NECC
    referred to her state registration at trial as a "certification."
    And, in an ordinary sense, someone who cannot legally work within
    a given profession at their place of employment because they are
    not "registered" as required by the law is not a "certified" member
    of   that   profession.       See    Webster's    Third     New    International
    Dictionary        (2002)     (defining        "certified"         as        "endorsed
    authoritatively:           guaranteed    or     attested     as        to   quality,
    qualifications, fitness, or validity").                 Consistent with that
    usage of the term, Massachusetts law itself presently defines a
    "certified pharmacy technician" as a "pharmacy technician who is,"
    among other things, "currently registered by the [Massachusetts]
    Board [of Registration in Pharmacy]."            
    247 Mass. Code Regs. 2.00
    .
    - 30 -
    Thus, although the defendant in Cadden did not advance
    the argument that Svirskiy now makes about why the use of the word
    "Certified" in the marketing document cannot suffice to ground a
    mail fraud conviction predicated on NECC's use of an unregistered
    pharmacist, we reach the same conclusion here as we did there,
    based   on     Boneau's     testimony    and    the     marketing     document
    representing that NECC used only "Certified Technicians."              For, in
    light of that evidence, on this record as on that one, "a juror
    reasonably could find that there was a sufficient circumstantial
    basis   to   draw   the    inference    that   the     allegedly    fraudulent
    representations concerning technician licensure had been made in
    each instance for these seven convictions, notwithstanding the
    absence of direct evidence to that effect."             Cadden, 965 F.3d at
    11.
    Svirskiy next asserts that, even if the evidence did
    suffice to show that each customer received a false representation
    that the medications would be prepared by registered pharmacist
    technicians,     the      evidence    fails    to     establish     that   such
    representations were "material" ones.               But, as we explained in
    Cadden, to establish materiality, "the government 'need not prove
    that the decisionmaker actually relied on the falsehood,'" so long
    as "the false statement 'had a natural tendency to influence, or
    [was] capable of influencing' its target's decision."                Id. at 12
    (alteration in original) (quoting United States v. Prieto, 812
    - 31 -
    F.3d   6,   13     (1st   Cir.   2016)).           And,   here,    the    evidence    of
    materiality was strong, just as it was there.
    Ralph     McHatton,     an    employee       of   North   Shore    Medical
    Center, which received the shipment underlying one of the Connolly
    counts, testified that compliance with state registration and
    certification requirements was "vital" and that he would not have
    purchased compounded medications from NECC had he known that those
    medications were prepared by a pharmacy technician who lacked a
    required registration.           Moreover, Boneau, the NECC salesperson,
    similarly        testified   that    it    was     important,      from   a   marketing
    perspective, to inform customers that NECC's pharmacy technicians
    were   licensed.4         Finally,    evidence       at    trial    showed     that   the
    American Society of Hospital Pharmacists ("ASHP") put out a "tool"
    for hospital pharmacies to use to evaluate outside contractors
    like NECC and that the tool recommended that such pharmacies
    inquire     as    to   whether   pharmacy        technicians       employed     by    the
    contractor were "licensed or registered in the state where they
    As Svirskiy points out, the transcript reveals that
    4
    the government asked Boneau whether it was important "that the
    pharmacists were licensed [and] the physician [sic] technicians
    were licensed," and that it was this question that Boneau responded
    to with a "[y]es." (emphasis added). Of course, Connolly was a
    pharmacy technician, not a "physician technician." But, context
    makes clear that the government and Boneau were both discussing
    the pharmacy technicians employed by NECC, and Svirskiy advances
    no plausible alternative explanation for what Boneau could have
    understood the government to mean when he responded to the
    question.
    - 32 -
    are practicing."    Thus, as in Cadden, we see no merit to the
    defendant's materiality-focused sufficiency challenges.            See 965
    F.3d at 12.
    Svirskiy also challenges the sufficiency of the evidence
    to support the nine Connolly-related, stand-alone counts of mail
    fraud on one other ground.         Here, he contends that the evidence
    failed supportably to show that he "obtained money or property 'by
    means of' [the] alleged fraud," United States v. Berroa, 
    856 F.3d 141
    , 148 (1st Cir. 2017) (quoting 
    18 U.S.C. § 1341
    ), and he
    contends that Berroa itself supports that contention.           But, there
    is no merit to this argument either.
    In   Berroa,    we    considered   mail   fraud   convictions   of
    defendants who obtained medical licenses through falsified test
    scores and went on to use those licenses to make money off medical
    patients years later.          See 
    id.
       We held that even though the
    defendants' gains from patients could not have been acquired absent
    their fraudulent scheme to obtain medical licenses, those gains
    were not acquired "by means of" that fraud within the meaning of
    
    18 U.S.C. § 1341
    .   
    Id.
        In reaching that conclusion, we held that
    the mail fraud statute imposed           not only a but-for causation
    requirement, but also a "natural[] induc[ement]" requirement, akin
    to proximate causation.         
    Id.
     at 149 & n.4.     We went on to hold
    that the "fraud in obtaining . . . medical licenses cannot be said
    to have 'naturally induc[ed]' healthcare consumers to part with
    - 33 -
    their money years later."               
    Id. at 150
     (quoting Loughrin v. United
    States, 
    573 U.S. 351
    , 363 (2014)).
    But,     here,       the     recipients       of     NECC's      fraudulent
    representations and the entities from whom NECC obtained its
    profits    were     one    and    the    same:       medical      providers        who   were
    customers of NECC.             The conclusion that this distinction is fatal
    to Svirskiy's contention draws support from Loughrin.
    There, the Supreme Court interpreted the federal bank
    fraud statute, which criminalizes executing a fraudulent scheme to
    acquire the property of a financial institution if done so "by
    means   of   false        or    fraudulent      pretenses,       representations,          or
    promises."        
    18 U.S.C. § 1344
    (2) (emphasis added).                        The Court
    interpreted that statute's "by means of" language to impose a
    natural inducement requirement.                 Loughrin, 573 U.S. at 363.
    Berroa made clear that the "by means of" language that
    Loughrin interpreted in the bank fraud statute carries a similar
    meaning when used in the mail fraud statute.                          
    18 U.S.C. § 1341
    ;
    see Berroa, 856 F.3d at 149-51.                 We thus find it significant that
    the   Supreme     Court        made    clear    in     Loughrin       that   the    natural
    inducement requirement is met "most clearly, when a defendant makes
    a misrepresentation to the bank itself -- say, when he attempts to
    cash,   at    the    teller's         window,    a     forged    or    altered      check."
    Loughrin, 573 U.S. at 363.                 Accordingly the fraudulent scheme
    involved     here --      which,      unlike     the    scheme    in     Berroa     itself,
    - 34 -
    depended on the use of fraudulent representations to the precise
    entities whose property the perpetrators of the fraudulent scheme
    sought   to    obtain --      relied    on   the    "most   clear[]"    way   for   a
    misrepresentation to naturally induce a victim to part with their
    money.
    Svirskiy emphasizes that Berroa expressed concern that,
    absent a natural inducement requirement, "virtually any false
    statement in an application for a medical license could constitute
    [the] federal crime" of mail fraud.              868 F.3d at 150.      Berroa thus
    worried that reading the mail fraud statute to cover the conduct
    at issue there might "infringe on the states' 'distinctively
    sovereign authority to impose criminal penalties for violations
    of' licensing schemes, 'including making false statements in a
    license application.'"          Id. (quoting Cleveland v. United States,
    
    531 U.S. 12
    , 23 (2000)).          But, the only fraud in Berroa involved
    the use of misrepresentations to a state agency in order to obtain
    a license from it.         The charged fraud here, by contrast, arises
    from misrepresentations to other private parties about whether a
    license from the state exists.           Punishing such a misrepresentation
    does   not    infringe   on    the     ability     of   states   to   regulate   the
    licensing process itself.            After all, there is little difference
    between a misrepresentation about a state licensing regime made to
    one's customers and other types of misrepresentations made to those
    - 35 -
    customers about the seller's credentials that the federal mail
    fraud statute undoubtedly does penalize.
    2.
    That brings us to Svirskiy's challenge to the last of
    his stand-alone mail fraud convictions, which is the only one for
    a count that is not related to NECC's use of Scott Connolly in its
    compounding operations.     This final count alleged that Svirskiy
    had   committed   mail    fraud    because    NECC   sold   methotrexate
    injectables to one of its customers, USC University Hospital, after
    making false representations to that customer about the products
    that it would sell them.
    Svirskiy argues that his conviction on this count cannot
    stand because the evidence shows that the medications that were
    shipped were both sterile and potent.        But, even assuming that is
    so, his opening brief fails to acknowledge, much less engage with,
    the government's theory that the mail fraud was based on the fact
    that NECC claimed to comply with USP-797 yet subsequently sold
    medications to USC University Hospital that contained an expired
    ingredient in violation of USP-797.5         And, indeed, the evidence
    5  Svirskiy's reply brief does make note of witness
    testimony indicating that the FDA allows for the stockpiling of
    certain emergency medications past their expiration date upon
    appropriate testing. But, he fails to develop an argument for why
    the existence of this program -- of which Svirskiy does not contend
    NECC's activities to have been a part -- suggests that NECC's
    conduct adhered to USP-797, which is the critical issue.
    - 36 -
    supportably    shows    that   even    though    NECC    represented     to   USC
    University     Hospital    that       it    complied     with     USP-797,    the
    methotrexate injectables at issue were prepared with an expired
    ingredient -- the methotrexate itself, which had expired more than
    four years prior -- in violation of USP-797.                    Thus, Svirskiy's
    sufficiency challenge to his conviction on this count fails as
    well.
    B.
    We    come,     then,   to       Svirskiy's     challenges     to   his
    racketeering    convictions,      rather      than      his     convictions   for
    committing stand-alone mail fraud offenses.                   Here, too, though,
    the challenges are without merit.
    1.
    We first confront Svirskiy's contention that, because
    his convictions for racketeering and racketeering conspiracy were
    premised, at least in part, on acts of mail fraud that mirror the
    mail fraud     grounding each of his ten stand-alone mail fraud
    convictions, the evidentiary holes that he identifies in the
    government's theory of mail fraud in challenging his convictions
    on the stand-alone counts of mail fraud also require us to reverse
    his racketeering and racketeering conspiracy convictions due to a
    lack of sufficient evidence.          But, as we have just explained, his
    challenges to the sufficiency of the evidence supporting the
    convictions on the stand-alone mail fraud counts lack merit. Thus,
    - 37 -
    these challenges to his racketeering or racketeering conspiracy
    convictions lack merit as well.
    2.
    Svirskiy's next set of challenges to these racketeering-
    related convictions also takes issue with the sufficiency of the
    evidence supporting them. But, in this set of challenges, Svirskiy
    does not question whether the evidence suffices to support the
    existence of the predicate acts of mail fraud found by the jury.
    Instead, he contends that the evidence did not suffice to show
    that those predicate acts, when viewed as a collective, constitute
    a "pattern of racketeering activity," 
    18 U.S.C. § 1962
    (c), even
    assuming the evidence of the existence of each individual predicate
    act of mail fraud sufficed.
    A pattern of racketeering activity must consist of "at
    least two acts of racketeering activity," the most recent of "which
    occurred within ten years . . . after the commission of a prior
    act of racketeering activity."    
    Id.
     § 1961(5).   The Supreme Court
    has made clear that, to establish such a "pattern," the government
    "must show that the racketeering predicates are related, and that
    they amount to or pose a threat of continued criminal activity."
    H.J. Inc. v. Nw. Bell Tel. Co., 
    492 U.S. 229
    , 239 (1989).
    Svirskiy argues that the government's evidence of both
    relatedness and continuity was lacking and that his convictions
    for racketeering and conspiring to racketeer for that reason must
    - 38 -
    each be reversed.     Our review is de novo.            See Cadden, 965 F.3d at
    15.
    a.
    The showing that the government needed to make to prove
    relatedness "is not a cumbersome one."                Feinstein v. Resolution
    Tr. Corp., 
    942 F.2d 34
    , 44 (1st Cir. 1991).              The government needed
    to prove only that "the predicate acts 'have the same or similar
    purposes,     results,     participants,         victims,      or        methods   of
    commission,    or   otherwise     are    interrelated         by    distinguishing
    characteristics and are not isolated events.'"                
    Id.
     (quoting H.J.,
    
    492 U.S. at 240
    ).
    As we have explained, the jury found that Svirskiy
    committed ten predicate acts of mail fraud:              nine Connolly-related
    predicate    acts   and   one   predicate      act    based    on    a    fraudulent
    representation of USP-797 compliance.                Svirskiy argues that the
    Connolly-based predicate acts and the USP-797-based predicate act
    are not related to one another and thus that the relatedness
    requirement is not supported by sufficient evidence. The Connolly-
    based predicate acts, he contends, concerned "one state regulatory
    violation,    raise[d]    no    issues       relating    to    patient      harm   or
    production practices, and ha[d] no link to . . . deficient drugs
    or improper cleaning and sanitization practices."
    We considered and rejected an identical challenge in
    Cadden.   As we explained, despite the evident differences between
    - 39 -
    the Connolly-related predicate acts and the one non-Connolly-
    related predicate act, the similarities between the two categories
    of acts were numerous:
    [A]ll reflect the same crime (mail fraud), the
    same category of victims (medical providers),
    the same purpose (profit), similar fraudulent
    misrepresentations (claims of compliance with
    regulatory schemes), similar methods of
    communicating those representations (NECC
    marketing materials), similar participants
    (employees of NECC), and the same method of
    commission (medication sales through NECC).
    They also all occurred within the same time
    frame.   Thus, a juror reasonably could find
    that   they   were  related,   despite   their
    differences.
    Cadden, 965 F.3d at 15–16 (citing Feinstein, 
    942 F.2d at 44
    ).                    The
    same conclusion follows here.
    b.
    The   next    aspect    of    Svirskiy's        challenge    to   these
    racketeering-related convictions takes aim at the evidence offered
    in support of the requirement that a "pattern of racketeering
    activity" be continuous.             The Supreme Court has recognized two
    ways    in    which   the    government         may   satisfy    this     continuity
    requirement.        First, it may establish the existence of closed-
    ended   continuity     "by    proving      a    series   of    related    predicates
    extending over a substantial period of time."                   H.J., 
    492 U.S. at 242
    .         Alternatively,    the     government        may    prove     open-ended
    continuity by establishing the existence of "past conduct that by
    - 40 -
    its nature projects into the future with a threat of repetition."
    
    Id. at 241
    .
    The jury found ten predicate acts of mail fraud that
    were committed over more than twenty-one months and targeted eight
    different customers.        Svirskiy contends that the government failed
    to establish that these acts demonstrate either open-ended or
    closed-ended continuity.           We conclude, reviewing de novo, see
    Cadden,   965   F.3d   at    15,   that   the    government   has       adequately
    established the existence of at least a closed-ended continuity.
    Closed-ended      continuity        is   "centrally     a    temporal
    concept."     H.J., 
    492 U.S. at 242
    .            While the Supreme Court has
    made clear that it is not enough to show that the acts "extend[ed]
    over a few weeks or months," 
    id.,
     we have previously recognized
    that a twenty-one month period is longer than what the Supreme
    Court has required, see Efron v. Embassy Suites (P.R.), Inc., 
    223 F.3d 12
    , 17 (1st Cir. 2000). Nevertheless, we have also recognized
    that such a period of time is "no[t] so far beyond the minimum
    time period that common sense compels a conclusion of continuity."
    
    Id. at 18
    .      In particular, we have deemed "highly relevant" the
    fact that "a defendant has been involved in only one scheme with
    a singular objective and a closed group of targeted victims."                 
    Id.
    As we have explained, a racketeering pattern "does not encompass
    a single criminal event, a single criminal episode, a single
    'crime' (in the ordinary, nontechnical sense of that word)."
    - 41 -
    Apparel Art Int'l, Inc. v. Jacobson, 
    967 F.2d 720
    , 722 (1st Cir.
    1992).   Rather, we look for whether "the defendant's conduct
    consists of 'multiple criminal episodes' over long periods of
    time."   González–Morales v. Hernández–Arencibia, 
    221 F.3d 45
    , 52
    (1st Cir. 2000) (quoting Schultz v. R.I. Hospital Tr. Nat'l Bank,
    
    94 F.3d 721
    , 731–32 (1st Cir. 1996)).
    Svirskiy contends that all the predicate racketeering
    acts found by the jury are part of the same criminal effort and
    thus do not establish closed-ended continuity as a matter of law.
    We disagree.
    This is not a case where the multiple predicate acts
    "were aimed at [a] single goal," Efron, 
    223 F.3d at 18
    , or involved
    the same "transaction," Home Orthopedics Corp. v. Rodríguez, 
    781 F.3d 521
    , 530 (1st Cir. 2015) (quoting González–Morales, 
    221 F.3d at 52
    ), because each individual predicate act of mail fraud was
    intended to generate its own distinct payment from a customer.
    Nor is this case one where all the predicate acts had the same
    "targeted victim" in common,    
    id.,
     as the ten predicate acts
    involved shipments sent to eight different customers of NECC.
    The racketeering acts here, moreover, "had the potential
    to last indefinitely," id. at 529, and were not merely of a "finite
    nature," id. (quoting Efron, 
    223 F.3d at 19
    ).    NECC's pattern of
    defrauding customers with false representations about the quality
    of its production process, after all, was not the sort of conduct
    - 42 -
    that would invariably come to an end once a certain objective was
    met.   Cf.   Schultz,   
    94 F.3d at 732
       (finding   no    closed-ended
    continuity   where   "the    alleged       racketeering   acts . . .      'taken
    together, . . . comprise a single effort' to facilitate a single
    financial endeavor" (quoting Apparel Art, 
    967 F.2d at 723
    )).                Had
    the operation not come to a halt, NECC's pattern of mail fraud was
    such that it could easily have reproduced its fraudulent conduct
    with new shipments of medications and new targets.
    Svirskiy nevertheless persists in his characterization
    of the illegal activity as consisting only of a single event.                In
    doing so, he emphasizes that the Connolly-based predicate acts
    involved a single regulatory violation, namely, Connolly's work
    without a mandatory registration.
    But, even setting aside the fact that the jury found a
    pattern of racketeering activity that included a non-Connolly-
    based act, the Connolly-based acts themselves were distinct. Those
    acts were deemed predicate acts because each one constituted a
    separate instance of mail fraud, not because each was a separate
    violation of Massachusetts law.            Each act of mail fraud in turn
    involved     a   separate     fraudulent          shipment    to     an     NECC
    customer -- eight customers in total.
    Svirskiy also argues, in an attempt to support his
    characterization of the alleged pattern of racketeering activity
    as constituting a single episode, that "the government did not
    - 43 -
    allege and did not offer any evidence that [he] did anything other
    than work alongside" Connolly.         But, Svirskiy does not dispute
    that, as the jury necessarily found, the evidence sufficed to show
    that, for each of the mail fraud counts and corresponding predicate
    acts, he did not simply work alongside Connolly but actually
    "cause[d] the use of the mails . . . for the purpose, or in
    furtherance, of executing [a] scheme to defraud."               Hebshie, 
    549 F.3d at 36
    .    Thus, this aspect of Svirskiy's challenge must fail.
    c.
    Svirskiy's   brief   also    could   be   read   to    claim   that
    insufficient    evidence   supported     his   racketeering       conspiracy
    conviction, as, he claims, the evidence failed to show that the
    predicate acts he conspired to commit constituted a "pattern of
    racketeering activity."    But, to the extent he means to make this
    argument, he simply echoes his challenges to the existence of a
    pattern of racketeering for the purpose of the racketeering count.
    Because those challenges fail, so, too, must his challenges to the
    racketeering conspiracy count.
    C.
    Svirskiy has one last evidentiary sufficiency challenge,
    and it takes aim at one of his two FDCA convictions.                     That
    conviction was for introducing adulterated drugs into interstate
    commerce with the intent to defraud or mislead, see 
    21 U.S.C. §§ 351
    (a)(2)(A), 331(a), 333(a)(2), and it was based on a shipment
    - 44 -
    of polymyxin-bacitracin that NECC sold to Glens Falls Hospital.
    Our review is de novo.       See Tanco-Baez, 942 F.3d at 15.
    Svirskiy contends that the medication contained in the
    shipment   was   untested,    and,   furthermore,   that   the   existing
    evidence suggests that the medication was in fact sterile.          But,
    even accepting his characterization of the record, the FDCA defines
    a drug as adulterated "if it has been prepared, packed, or held
    under insanitary conditions whereby it may have been contaminated
    with filth, or whereby it may have been rendered injurious to
    health."   
    21 U.S.C. § 351
    (a)(2)(A).       Svirskiy makes no argument
    that the evidence failed to support the government's contention
    that the conditions in the NECC clean room where the polymyxin-
    bacitracin was compounded were sufficiently unclean or unsafe to
    render medications produced in that clean room "adulterated."
    Thus, he provides no ground for concluding that the conviction
    must be overturned for insufficient evidence.6
    D.
    Svirskiy's final challenge targets his FDCA conviction
    relating to the shipment of polymyxin-bacitracin sent to Glens
    Falls Hospital.     But, unlike in his challenges to his other
    6Svirskiy also contends that the evidence showed that
    he had no personal interaction with Glens Falls Hospital. But, he
    fails to explain why this fact, even if compelled by the evidence,
    would require reversal of his FDCA conviction, and thus he has
    waived any argument to that effect. See Zannino, 
    895 F.2d at 17
    .
    - 45 -
    convictions, in this one he asks us only to vacate the conviction,
    as he contends that the District Court erred in instructing the
    jury with respect to the underlying offense.
    The relevant background is the following.             Multiple
    defendants charged with multiple FDCA crimes were being tried
    together.     Accordingly,   the   District     Court   identified     three
    distinct sets of charged FDCA offenses for which instructions would
    have to be given:     (1) counts premised on drugs alleged to be
    "adulterated" because they had been compounded under unsanitary
    conditions, see 
    21 U.S.C. § 351
    (a)(2)(A); (2) counts premised on
    drugs alleged to be "misbranded" because their labels were false
    or misleading, see 
    id.
     § 352(a); and (3) counts premised on drugs
    alleged to be "misbranded" because they were dispensed without a
    prescription, see id. § 353(b)(1).        The District Court proposed
    instructing the jury on the different sets separately.            However,
    because all three sets of counts involved allegations that the
    defendants introduced drugs into interstate commerce "with an
    intent to defraud or mislead," id. § 333(a)(2), the District Court
    also proposed defining "intent to defraud or mislead" in the
    portion of the instructions in which it explained the elements of
    the   unsanitary   conditions   counts,   and    then   relying   on   that
    definition when describing the counts premised on mislabeling or
    dispensing drugs without a prescription.
    - 46 -
    Consistent with this proposal, the District Court's
    draft instructions to the jury explained what the government needed
    to show to prove "an intent to defraud or mislead" as follows:
    An intent to defraud or mislead signifies
    a departure from fundamental honesty, or fair
    play and candid dealings in the general life
    of the community.     To act with "intent to
    defraud" means to act knowingly and with the
    intention or the purpose to deceive or to
    cheat.
    An intent to defraud or mislead may be
    shown by evidence that a defendant took
    actions to conceal or prevent the discovery of
    the truth. The deceit must be about something
    material, that is, something important that
    has a natural tendency to influence, or that
    is capable of influencing, a customer. The
    government does not have to prove that any
    person to whom the deceit was directed was in
    fact influenced, only that a defendant
    intended such a result.
    As with any other offense alleging an
    intent to defraud or mislead, the government
    must prove beyond a reasonable doubt that a
    defendant did not act in good faith for you to
    find on these counts that he acted with an
    intent to defraud or mislead.
    The government then proposed revisions to the draft
    instructions, in which it asked for the words "or a government
    regulator" to be inserted after "a customer," to clarify that the
    deceit could target not only customers, but also regulators.      In
    the next round of     revisions, the District Court adopted       the
    government's suggestion on this point.
    At   a   subsequent   charge   conference   with   counsel,
    Svirskiy's attorney took issue with the relevant instruction as it
    - 47 -
    had been revised.     He argued that, as to the unsanitary conditions
    counts,   "[t]here's     no    evidence        of    any   representations    or
    involvement   with    regulators."        The       government's   counsel,    in
    response, pointed out that, in the District Court's instructions,
    the same "definition of an intent to defraud or mislead is used in
    reference in the counts that go to the unsanitary conditions [FDCA
    counts], to the mislabeling [counts], and the no prescriptions
    [counts],"    and    that,    as   to   "the    no    prescriptions"   counts,
    "[t]here's certainly an allegation" of "an intent to defraud or
    mislead a regulator."         The District Court proceeded to instruct
    the jury with the "regulator" phrase included.
    Svirskiy      challenges      his     conviction     based   on     the
    instructions' inclusion of the "regulator" phrase.                 He does not
    dispute that, in theory, an "intent to defraud or mislead" could
    be based on deceit that targets a government regulator, see United
    States v. Bradshaw, 
    840 F.2d 871
    , 872 (11th Cir. 1988), and thus
    we may assume that the District Court's instruction did not
    misstate the law.      Yet, he argues that there was "not a scintilla
    of evidence to link Svirskiy's role as checking pharmacist of the
    polymyxin-bacitracin sent to Glens Falls Hospital to" an intent to
    "violate or defeat government enforcement of NECC."
    Because Svirskiy does not argue that the instruction in
    question was legally deficient, we review for abuse of discretion,
    see United States v. De La Cruz, 
    835 F.3d 1
    , 12 (1st Cir. 2016),
    - 48 -
    assuming, that is, the challenge to the instruction was preserved.
    We find no such abuse.
    The District Court structured the instructions so that
    the description of the requisite "intent to defraud or mislead"
    applied not just to the FDCA count at issue here but also to
    multiple FDCA counts involving multiple defendants.          Svirskiy does
    not dispute that this is so or that, as to some of those FDCA
    counts (albeit ones that did not involve him), the government did
    present evidence that would allow a jury to find an intent to
    defraud or mislead a regulator.       Moreover, he acquiesced in the
    District Court's structuring of the instructions at trial and fails
    to argue now that the District Court abused its discretion in
    structuring its instructions the way it did, such that the "intent
    to    defraud   or   mislead"   explanation    first    appeared   in   the
    "unsanitary conditions" section of the instructions on the FDCA
    counts and then was referred to in the other portions of the
    District Court's FDCA instructions.        Instead, his only argument to
    the District Court was that the instructions should not have
    referenced government regulators at all.         Given that he concedes
    that the instruction was legally accurate and applicable to at
    least some of the FDCA counts to which it applied, this argument
    provides no basis for concluding that the District Court abused
    its    discretion.      Thus,   we   reject    his     instructional-error
    challenge.
    - 49 -
    IV.
    The     last   of   the    three    former   NECC   pharmacists       who
    challenge    their    convictions       in   these    consolidated      appeals    is
    Christopher Leary.         Leary worked in NECC's clean rooms and was
    sometimes responsible for signing off on medications before they
    left a clean room for shipment.
    The indictment charged him with racketeering, see 
    18 U.S.C. § 1962
    (c), racketeering conspiracy, see 
    id.
     § 1962(d), six
    counts of mail fraud, see id. § 1341, and three FDCA violations,
    see   
    21 U.S.C. §§ 331
    (a),       333(a).     One    mail   fraud    count    was
    dismissed before the verdict.
    The case went to trial, and the jury convicted Leary of
    three mail fraud counts and three FDCA counts -- one with an intent
    to defraud or mislead -- but acquitted him of the racketeering
    count, the racketeering conspiracy count, and the other mail fraud
    counts.    Based on those convictions, the District Court sentenced
    him to two years' probation with eight months of home confinement
    and one hundred hours of community service.
    Leary appeals each of his mail fraud convictions on
    sufficiency-of-the-evidence grounds.                 He does the same for his
    FDCA convictions. He also raises a Confrontation Clause challenge.
    We review each argument in turn.
    - 50 -
    A.
    Leary first contends that the evidence does not suffice
    to establish his guilt as to each of the three mail fraud counts.
    Our review is de novo.      See Tanco-Baez, 942 F.3d at 15.
    For each of the charged shipments, the government's
    theory was, at least in part, that Leary participated in a mail
    fraud   scheme     that   involved   informing   customers    of   NECC's
    compliance with USP-797 and then selling them medications that
    were not tested in the manner that USP-797 required prior to
    shipment.       Leary does not dispute that he caused each of the
    shipments of medications identified in each mail fraud count to be
    sent in the mail.     See Hebshie, 
    549 F.3d at 35-36
    .        He also does
    not dispute that NECC represented to the customers identified in
    each of the shipments that it complied with USP-797.          Nor does he
    meaningfully dispute the government's contention that, despite
    those representations of compliance, each of the charged shipments
    was sent to a customer without having gone through the testing
    that USP-797 requires.7     Instead, Leary focuses on the requirement
    Leary does suggest that the lack of testing for two of
    7
    these shipments may not have violated USP-797. But, as he concedes
    in his brief, he does "not go into detail on the technicalities
    for required testing under the USP guidelines," and instead only
    refers back to his District Court filings for a more developed
    argument. Thus, we treat this aspect of his argument as waived
    for lack of development.     See Zannino, 
    895 F.2d at 17
    ; United
    States v. Burgos-Montes, 
    786 F.3d 92
    , 111 (1st Cir. 2015)
    ("Arguments incorporated into a brief solely by reference to
    district court filings are deemed waived.").
    - 51 -
    that he was a "knowing and willing participa[nt]" in "a scheme to
    defraud."    
    Id. at 35
    .
    Leary   primarily   contends   that   the   evidence   did   not
    suffice to show that, for each of the charged shipments, he was
    aware that the medication was prepared in violation of USP-797.
    He also contends, in support of this argument about his lack of
    knowledge, that other employees of NECC were responsible for
    conducting tests in accordance with USP-797 and reviewing the
    results of such tests.
    But, as the government points out, and Leary does not
    contest, the evidence clearly establishes that Leary was aware of
    NECC's frequent practice of sending out untested lots of medication
    and that he personally approved of the production of such lots
    without the mandated testing on a number of occasions.         Leary also
    fails to identify any relevant differences between the untested
    shipments underlying the counts for which he was convicted and
    untested shipments of which the evidence showed Leary to have been
    generally aware.     Moreover, Leary concedes that, for each of the
    counts of conviction, he was responsible for filling out a logged
    formula worksheet, a step that William Frisch, the Massachusetts
    Board of Pharmacy witness, testified was the "final quality control
    of the compounded mixture" and signified that the pharmacist had
    "check[ed] that [the] formulation is correct, [and] that there
    [were] proper ingredients, proper weights, . . . [and that the]
    - 52 -
    expiration     dates     of   components"      had    not    passed.       Thus,
    notwithstanding       that    Leary   would    not    have   been   personally
    responsible for testing the medications, given his important role
    in approving the medications to leave the clean room for shipment
    and the strong evidence that he was generally aware of NECC's
    practice of shipping untested medications, we do not see how a
    juror would be precluded from drawing the reasonable inference
    that Leary would have been aware of the untested nature of each of
    the medications underlying each of the counts of conviction.
    Leary also argues that he was unaware of various other
    substandard aspects of the medications contained in the shipments
    in question.     For instance, he contends that, as to one of the
    counts,   he    was    unaware   that   the    medication    was    made   using
    contaminated stock solution, and that, as to another, he was
    unaware that it was improperly prepared.             But, because we find the
    evidence that Leary was aware of the untested nature of the
    medications to be sufficient to establish mail fraud, we need not
    consider whether Leary had knowledge of other facts about the
    compounded medications that would conflict with representations
    that NECC had made to its customers about the quality of its
    products.      For similar reasons, the arguments Leary makes that
    customers were satisfied with NECC's medications are beside the
    point, as they fail to show that Leary did not participate in a
    - 53 -
    mail fraud scheme aimed at misleading customers about NECC's
    compliance with the testing requirements of USP-797.
    Leary further contends that, even if he did know that
    the medications he was verifying had been prepared in violation of
    USP-797, he nevertheless could not have been a participant in a
    mail fraud scheme, because he was unaware that NECC had made any
    misrepresentations to customers about that standard.                Leary points
    out, furthermore, that the evidence did not show any interaction
    between him and NECC's customers or NECC's marketing staff.
    But, as a pharmacist working in Massachusetts, Leary was
    legally obligated to follow USP-797, see 
    247 Mass. Code Regs. 9.01
    (3), and a juror could easily infer that Leary would not have
    been ignorant of that obligation.           Likewise, a juror could easily
    infer that Leary would have been aware of the importance of NECC's
    compliance with this obligation to customers.
    Boneau,   the     NECC    salesperson,     testified     that    "U.S.
    Pharmacopeia was like the Bible for all pharmacies" and that as a
    compounding    pharmacy     "you     need[ed]   to   show    that   you're . . .
    exceeding     those   guidelines       so   that     [customers]     felt     more
    comfortable outsourcing."            After all, the testing and sterility
    guidelines of USP-797 that the government introduced into evidence
    were explicitly aimed at "prevent[ing] harm, including death, to
    patients that could [otherwise] result."              USP-797 at 1.        Thus, a
    reasonable    juror   could    conclude     that     Leary   knew   that    NECC's
    - 54 -
    customers were relying on its compliance with USP-797 and that
    their orders despite NECC's lack of compliance were indicative of
    misrepresentations by NECC -- at the very least in the sense that
    they were indicative of concealment.8
    Leary does contend that, in any event, the evidence was
    insufficient    to    conclude     that     those     misrepresentations    were
    material and also to show that he possessed the requisite intent
    to defraud or mislead.       But, here, too, we are not persuaded.
    Leary     does   not    challenge    the    District   Court's   jury
    instructions on the elements of materiality and intent, which
    defined "a fact or matter [a]s material if it has a natural
    tendency   to   influence         or   is   capable      of   influencing   the
    decisionmaker involved" and explained that "[t]o act with intent
    to defraud means to act willfully and with the specific intent to
    deceive or cheat for the purpose of either causing some financial
    loss to another or to bring about some financial gain to oneself."
    Because of the importance of USP-797 for the safety of NECC's
    medications, as we have just explained, the jury had sufficient
    evidence to find that the government had proven beyond a reasonable
    8Like Svirskiy, Leary does not challenge the jury
    instructions' definition of "false or fraudulent pretenses [and]
    representations" under the mail fraud statute, 
    18 U.S.C. § 1341
    ,
    as encompassing "half truth[s]" and the "concealment of a material
    fact."
    - 55 -
    doubt that the misrepresentations concerned "a material fact or
    matter."
    Moreover, a reasonable juror could supportably find that
    NECC's sales were premised on USP-797 compliance and, hence, that
    its misrepresentations about that fact were aimed at "bring[ing]
    about some financial gain" to NECC.                 Combining this aim with
    Leary's    "knowing    and   willing       participation"      in   "a   scheme    to
    defraud,"    and      "taking      all     reasonable     inferences      in    [the
    government's] favor," we see no reason that a reasonable juror
    could not also have inferred that Leary participated in that scheme
    "with the intent to defraud."              Hebshie, 
    549 F.3d at 35
     (quoting
    United States v. Cheal, 
    389 F.3d 35
    , 41 (1st Cir. 2004), and United
    States v. O'Brien, 
    14 F.3d 703
    , 706 (1st Cir. 1994)).                     Nor does
    Leary provide such a reason.
    Separately, Leary argues that the jury's findings that
    he   committed     mail    fraud    are    impossible     to   square    with     its
    acquittals of Leary and some of his co-defendants on other counts
    involving related conduct.           But, even assuming we were to agree
    with him that the jury's verdict could not be reconciled with
    itself in these respects (a matter on which we take no view), he
    concedes that it would not provide an independent reason to upset
    the jury's findings of guilt.              See United States v. Vizcarrondo-
    Casanova,    
    763 F.3d 89
    ,    104     (1st   Cir.   2014)     ("[L]ogically
    - 56 -
    inconsistent jury verdicts on multiple counts are not grounds for
    reversing a conviction.").
    That     leaves   Leary's    assertions   that,      because   he
    personally did not represent to customers that NECC was complying
    with USP-797 and because he personally was not responsible for
    NECC's failure to test the medications, he could not have committed
    mail fraud.    But, as we have explained, the government presented
    sufficient evidence for a jury to conclude that NECC was engaged
    in a mail fraud scheme, that Leary was a knowing and willing
    participant in that scheme, and that, as to each count, Leary
    caused a shipment of medication to be sent through the mail in
    furtherance of that scheme.    No more was needed to show his guilt.
    See Hebshie, 
    549 F.3d at 35-36
    .
    B.
    There    remain   Leary's   challenges    to   the   evidentiary
    sufficiency for each of his three FDCA convictions.         Because Leary
    already raised these challenges in his Rule 29 motion, we apply de
    novo review.     See Tanco-Baez, 942 F.3d at 15.
    1.
    Leary first takes issue with his one FDCA conviction in
    which the government alleged that he introduced an adulterated
    drug into interstate commerce in violation of 
    21 U.S.C. § 331
    (a).
    The government's theory was that the medication in question was
    adulterated because it was produced under unsanitary conditions.
    - 57 -
    See 
    id.
     § 351(a)(2)(A).                    As to this conviction, the jury found
    that he engaged in this conduct with an "intent to defraud or
    mislead," an aggravating factor.                  Id. § 333(a)(2).         Leary disputes
    that he possessed such an intent.
    The District Court's instructions to the jury specified
    that the jury may find an intent to defraud or mislead if there is
    evidence of "deceit . . . about something material" and a failure
    to    act       in    "good    faith."        Leary    does    not     argue    that   these
    instructions in any way misstated the law.                           Instead, he contends
    that he acted in good faith and without deceit about something
    material.            But his contention does not grapple with the relevant
    evidence.
    The shipment at issue in this FDCA count was identical
    to    a    shipment       that      also    grounded    one    of    Leary's    mail   fraud
    convictions:            a shipment of polymyxin-bacitracin irrigation bags
    to Glen Falls Hospital in New York.                          As we explained for that
    conviction, a jury could find that Leary knew that the medication
    was       not    tested       in    accordance    with       USP-797,     despite      NECC's
    representations           to       the   contrary,     and    that    Leary    nevertheless
    approved         the    medication         for   shipment      without     notifying     the
    customer about the inconsistency.9 Leary fails to explain why this
    Leary again contends that the jury's verdict on this
    9
    count is impossible to reconcile with some of its other findings.
    But, as we have already explained, such inconsistencies are not
    - 58 -
    conduct did not constitute a failure to act in good faith or why
    the deceit involved in this conduct was not material.
    2.
    Leary's    remaining    two     FDCA    convictions   were    each
    premised    on   shipments    of   methotrexate     injectables   that    were
    alleged to have been misbranded due to false and misleading
    labeling.    See 
    21 U.S.C. § 352
    (a).        Leary's contention is that the
    evidence did not suffice to demonstrate that he acted with an
    intent to defraud.         But, the jury did not find that Leary acted
    with an intent to defraud or mislead, see 
    id.
     § 333(a)(2); it
    convicted    Leary    on   these   counts    only   of   misdemeanor     strict
    liability FDCA violations, see id. § 333(a)(1).               Thus, Leary's
    challenge to these convictions lacks merit.10
    C.
    In Leary's last challenge, he contends that we should
    reverse all of his convictions because a government exhibit was
    improperly introduced into evidence in violation of his rights
    under the Confrontation Clause of the federal Constitution.                  We
    grounds for reversing a conviction.          See Vizcarrondo-Casanova, 763
    F.3d at 104.
    10In a short footnote, Leary asserts that his
    convictions on all three FDCA counts should also be vacated because
    their underlying strict-liability provisions -- like "any statute
    that does not require a mens rea" -- "violate his constitutional
    rights afforded to him by due process." We find this assertion
    unpersuasive for the same reasons that led us to reject Stepanets's
    due process challenge above.
    - 59 -
    review his preserved Confrontation Clause challenge de novo.               See
    United States v. Veloz, 
    948 F.3d 418
    , 430 (1st Cir. 2020).
    The exhibit in question relates to the testimony of a
    witness, Owen Finnegan, who was a pharmacy technician at NECC.
    During Finnegan's testimony, Leary's lawyers tried to show that
    Finnegan harbored a personal dislike of Leary.           In furtherance of
    that objective, they introduced into evidence an email chain
    involving    Finnegan    and   Leary   that,   they   claimed,   showed    the
    animosity between them.         After Finnegan's testimony concluded,
    though, the government attempted to introduce other parts of that
    same email exchange that could be read to show that what Leary
    characterized as hostility was just the two men joking around.
    Leary argues that the introduction of the email exchange
    between him and Finnegan after Finnegan's testimony concluded
    violated his rights under the Confrontation Clause.                But, the
    "threshold    question    in   every   [Confrontation    Clause]    case   is
    whether   the   challenged     statement    is   testimonial,"     and    "the
    Confrontation Clause has no application" if the answer is no.
    Veloz, 948 F.3d at 430-31 (quoting United States v. Figueroa-
    Cartagena, 
    612 F.3d 69
    , 85 (1st Cir. 2010)).           The emails Finnegan
    sent to his co-worker were in no sense testimonial, as we cannot
    see how they were "produced with a 'primary purpose of creating an
    out-of-court substitute for trial testimony,'" United States v.
    Lyons, 
    740 F.3d 702
    , 719 (1st Cir. 2014) (quoting Michigan v.
    - 60 -
    Bryant, 
    562 U.S. 344
    , 358 (2011)), and Leary mounts no argument to
    the contrary.11   Thus, we find no merit to this final challenge.
    V.
    We affirm Stepanets's convictions and sentence, and we
    affirm Svirskiy's and Leary's convictions.
    11Because we conclude that the Confrontation Clause has
    no application to the exhibit in question, we need not reach
    Leary's further assertion that its introduction "was unfair and
    caused significant prejudice to [him]." To the extent that Leary
    means to raise an independent "unfair prejudice" argument against
    the exhibit's admission based on Rule 403 of the Federal Rules of
    Evidence, he did not preserve this argument below, nor does he
    adequately develop it now, and so it is waived. See Zannino, 
    895 F.2d at 17
    .
    - 61 -