United States v. Suado Ali ( 2013 )


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  •                              PUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 12-4630
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    SUADO MOHAMED ALI, a/k/a Suada Mohamed Ali, a/k/a Sue,
    Defendant - Appellant.
    No. 12-4631
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    AHMED ALI HASSAN, a/k/a Dirir,
    Defendant - Appellant.
    No. 12-4632
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    ABDIRAHMAN ABSHIR JIBRIL, a/k/a Abdi Ali Mire,
    Defendant - Appellant.
    No. 12-4657
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    HARUN SALHAN,
    Defendant - Appellant.
    No. 12-4672
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    HIBO MUSSE SAMANTAR, a/k/a Fadumo,
    Defendant - Appellant.
    No. 12-4674
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    2
    ABOKOR GURREH, a/k/a Mohamed Farhan, a/k/a Mubarak, a/k/a
    Farhan M. Mohamed,
    Defendant - Appellant.
    No. 12-4675
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    NAGI MANSOR SEAA ALASHMALI, a/k/a Mohamed Albokhiti,
    Defendant - Appellant.
    No. 12-4676
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    KHALED AHMED ISA, a/k/a Hamza, a/k/a Adnan, a/k/a Khalid
    Ahmed Aesaa, a/k/a Khaled A. Aesa,
    Defendant - Appellant.
    No. 12-4679
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    3
    ISMAIL MOHAMUD ABDI,
    Defendant - Appellant.
    No. 12-4682
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    ABDI MUHUMED, a/k/a Juba,
    Defendant - Appellant.
    No. 12-4687
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    LUTF MOHAMED ALBUKHAITI,
    Defendant - Appellant.
    No. 12-4699
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    4
    ABDI OMAR ABDI,
    Defendant - Appellant.
    No. 12-4700
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.
    OSMAN YUSUF,
    Defendant - Appellant.
    Appeals from the United States District Court for the Eastern
    District of Virginia, at Alexandria.    T. S. Ellis, III, Senior
    District   Judge.     (1:11-cr-00261-TSE-4;   1:11-cr-00261-TSE-6;
    1:11-cr-00261-TSE-8;   1:11-cr-00261-TSE-9;   1:11-cr-00261-TSE-5;
    1:11-cr-00261-TSE-17; 1:11-cr-00261-TSE-1; 1:11-cr-00261-TSE-15;
    1:11-cr-00261-TSE-11;   1:11-cr-00261-TSE-12;   1:11-cr-00261-TSE-
    13; 1:11-cr-00261-TSE-16; 1:11-cr-00261-TSE-7)
    Argued:   September 19, 2013              Decided:   November 14, 2013
    Before NIEMEYER, GREGORY, and FLOYD, Circuit Judges.
    Affirmed by published opinion.        Judge Niemeyer wrote         the
    opinion, in which Judge Gregory and Judge Floyd joined.
    ARGUED:   Joseph John McCarthy, DELANEY, MCCARTHY & COLTON, PC,
    Alexandria, Virginia;   Thomas Brian Walsh, PETROVICH & WALSH,
    PLC, Fairfax, Virginia;      William B. Cummings, WILLIAM B.
    CUMMINGS, PC, Alexandria, Virginia, for Appellants.     Michael
    John Frank, OFFICE OF THE UNITED STATES ATTORNEY, Alexandria,
    Virginia, for Appellee.    ON BRIEF:   Michael S. Arif, ARIF &
    ASSOCIATES, PC, Springfield, Virginia, for Appellant Ahmed Ali
    5
    Hassan. Bruce M. Cooper, Washington, D.C., for Appellant Harun
    Salhan.   Alfred L. Robertson, Jr., ROBERTSON LAW OFFICE, PLLC,
    Alexandria, Virginia, for Appellant Hibo Musse Samantar.     John
    O. Iweanoge, II,   THE IWEANOGE’S FIRM, P.C., Washington, D.C.,
    for Appellant Suado Mohamed Ali. Frank Salvato, Alexandria,
    Virginia, for Appellant Ismail Mohamud Abdi.        Anser Ahmad,
    ADVANCED IMMIGRATION LAW GROUP, PC, Harrisburg, Pennsylvania,
    for Appellant Abdi Muhumed.     Daniel T. Lopez, BRIGLIA HUNDLEY
    NUTALL & KAY PC, Vienna, Virginia, for Appellant Osman Yusuf.
    John L. Machado, LAW OFFICE OF JOHN MACHADO, Washington, D.C.,
    for Appellant Abokor Gurreh.      Gary H. Smith, GARY H. SMITH
    ATTORNEY AT LAW, Alexandria, Virginia, for Appellant Abdi Omar
    Abdi.     Robert L. Jenkins, Jr., BYNUM & JENKINS, PLLC,
    Alexandria, Virginia, for Appellant Lutf Mohamed Albukhaiti.
    Neil H. MacBride, United States Attorney, Kyle Maurer, Special
    Assistant United States Attorney, Mary K. Daly, Assistant United
    States   Attorney,  OFFICE   OF   THE  UNITED  STATES   ATTORNEY,
    Alexandria, Virginia, for Appellee.
    6
    NIEMEYER, Circuit Judge:
    Seventeen        individuals,      all     originally      from      Somalia       or
    Yemen,    were   indicted        for    their     participation          in    a    large
    conspiracy to traffic in khat, a leafy plant native to the Horn
    of Africa.       Khat contains the controlled substance cathinone,
    which is desired for the euphoria it provides when khat leaves
    are chewed.      Thirteen of the defendants were also charged with
    conspiracy to commit money laundering.
    After four of the defendants pleaded guilty pursuant to
    plea agreements, the remaining thirteen proceeded to trial and
    were convicted of all charges, except one, who was acquitted of
    the money laundering charge.             All thirteen defendants filed this
    appeal, arguing principally that the evidence was insufficient
    to convict them because it failed to show that they knew that
    cathinone was a controlled substance and that khat contained
    cathinone.       In    a   similar     vein,    they     challenge       the   district
    court’s   jury    instructions         relating     to      scienter     and       willful
    blindness.    The defendants convicted of money laundering contend
    that the indictment failed to adequately identify the financial
    transactions and other details so as to give them sufficient
    notice of the charges.            And finally, the defendants challenge
    the district court’s procedural rulings to exclude their expert
    witness   and,    as       to   one    defendant,      to    deny    a    motion       for
    severance.
    7
    After       careful   consideration           of   the    defendants’     arguments
    and the large record in this case, we affirm.
    I
    Khat (pronounced “cot”) is a leafy shrub that grows in East
    Africa     and    part     of    the     Arabian        peninsula,    principally    in
    Ethiopia, Yemen, and Kenya.              When khat is fresh, it contains the
    alkaloid     cathinone,         which    is    a   stimulant,       and   chewing   khat
    leaves causes excitement, loss of appetite, and euphoria.                            The
    cathinone in khat degrades after it is picked, breaking down
    after    a    few       days     into    the       less    potent     drug,     cathine.
    Consequently, fresh khat is more desirable to its users and thus
    more expensive and more profitable to its sellers.
    While       khat    itself     is    not      a    controlled    substance,     the
    cathinone in fresh khat is a Schedule I controlled substance,
    see 21 C.F.R. § 1308.11(f)(3), and the less-potent cathine in
    stale khat is a Schedule IV controlled substance, see 21 C.F.R.
    § 1308.14(f)(1).               Accordingly,        it     is   illegal    to   possess,
    distribute, buy, or sell khat, although the defendants point out
    that khat is not illegal in some east African countries, and in
    those countries, its use is common in social settings.
    Typically, khat is harvested in Kenya and flown in bundles,
    first to Europe and then to the United States.                             Each bundle
    typically contains 40 to 60 stems and leaves and is bound by
    8
    banana leaves to preserve freshness.           Because it is perishable,
    khat is typically not stored.            During the period relevant to
    this case, fresh khat in the United States sold for up to $60
    per bundle at retail and $50 at wholesale.
    In August 2008, federal law enforcement officers began an
    investigation   into   the   importation       of   khat   into    the   United
    States and its subsequent distribution, ultimately leading them
    to   Yonis   Ishak,    the   head   of     a    large-scale       distribution
    operation.   Ishak’s enterprise distributed some 10 to 11 million
    grams of khat over a period from February 2005 to May 2011 in
    the Baltimore/Washington area (including northern Virginia), New
    York City, and Columbus, Ohio.          Law enforcement also discovered
    that proceeds from the sale of khat were laundered through the
    Virginia branch of Dahabshil, Inc., a wire transfer service, and
    sent to Ishak’s overseas suppliers in the United Kingdom and
    Africa.
    In June 2011, Ishak and 16 co-conspirators were indicted
    for conspiracy to possess with intent to distribute cathinone,
    in violation of 21 U.S.C. §§ 841(a) and 846, and 13 of the
    defendants were also indicted for conspiracy to commit money
    laundering, in violation of 18 U.S.C. § 1956(h).                    Ishak and
    three other defendants pleaded guilty to Count 1 pursuant to
    plea agreements, and the remaining 13 defendants proceeded to
    9
    trial on April 17, 2012.           Pursuant to his plea agreement, Ishak
    served as the government’s principal witness. ∗
    At the outset of trial, the defendants charged with money
    laundering moved to dismiss that count because the indictment
    neglected     to    allege       “which    of     the    qualifying      financial
    transactions the defendant conducted or attempted to conduct.”
    They argued that the deficiency left open the possibility that
    the jury could make a finding not charged by the grand jury, in
    derogation    of    each   defendant’s         Fifth   Amendment   rights.       The
    district court denied the motion as untimely but invited these
    defendants    to     renew       their    arguments      at    trial   through    a
    sufficiency    of    the     evidence      motion      under   Federal   Rule     of
    Criminal Procedure 29.
    Prior to the conclusion of trial, defendant Abokor Gurreh
    filed a motion for severance of his trial on the ground that
    another     defendant      had     presented       evidence     antagonistic      to
    Gurreh’s interest.         The district court denied the motion.                Also
    ∗
    Thirteen of the seventeen defendants were named defendants
    in both Counts 1 and 2:     Abdi Omar Abdi, Ismail Mohamud Abdi,
    Lutf Mohamed Albukhaiti, Suado Mohamed Ali, Abokor Gurreh,
    Hassan Hassan, Khaled Ahmed Isa, Yonis Muhudin Ishak, Abdulkadir
    Ali Isse, Abdirahman Abshir Jibril, Abdi Muhumed, Harun Salhan,
    and Osman Yusuf. And four defendants were named defendants only
    in Count 1:     Nagi Mansor Seaa Alashmali, Ahmed Ali Hassan,
    Moheeb   Ahmed   Mohammed  Nasser,   and  Hibo   Musse  Samantar.
    Defendants Ishak, Ali Isse, Hassan Hassan, and Nasser pleaded
    guilty to Count 1, pursuant to a plea agreement, and the
    remaining defendants were convicted by the jury on all counts,
    except that Harun Salhan was acquitted on Count 2.
    10
    during     trial,     the   court     excluded       the        testimony     of     the
    defendants’ expert witness regarding the chemical nature of khat
    on the basis that the defendants’ designation of the expert at
    trial    was   not    timely    and   that,    in    addition,       the    proffered
    testimony was not relevant.
    At the conclusion of the evidence, the defendants moved for
    acquittal under Rule 29, arguing that the government did not
    present sufficient evidence of scienter because it failed to
    establish      that   the      defendants     knew       that    cathinone     was     a
    controlled substance and that khat contained cathinone.                              The
    court denied the motion, concluding that, to prove scienter, the
    government was required only to show that defendants knew that
    khat contained a controlled substance.                   It also instructed the
    jury to that effect.            In the same vein, it gave the jury an
    instruction     on    willful     blindness,        to    which    the      defendants
    objected.
    The jury convicted the 13 defendants on all counts, except
    Harun Salhan, who was acquitted on Count 2 (the money laundering
    count), and the court imposed prison sentences on the defendants
    ranging from 3 months to 12 months and a day.
    These appeals followed.
    11
    II
    The defendants first contend that the district court erred
    in instructing the jury on both scienter and willful blindness.
    They argue that, by allowing the government to prove simply that
    they    trafficked    in    khat       and       knew    that   khat   contained    a
    controlled substance, the court reduced the government’s burden
    to prove that the defendants conspired knowingly to distribute
    cathinone    or   knowingly       to   possess          cathinone   with   intent   to
    distribute it.       The defendants also contend that the evidence
    did not support a willful blindness instruction.                           We address
    these challenges seriatim.
    A
    With respect to scienter, the defendants argue that “the
    government bore the burden of proving [that they] knew cathinone
    was a controlled substance and that it was contained in khat.”
    As they point out, Count 1 of the indictment charged that the
    defendants did
    unlawfully,   knowingly, and   intentionally   .  .   .
    conspire   .   .   .  to  unlawfully,   knowingly   and
    intentionally distribute, and to possess with intent
    to distribute, a mixture and substance containing a
    detectable   amount   of  cathinone,   a   Schedule   I
    controlled substance.
    (Emphasis added).         They note that the indictment did not charge
    that they conspired to distribute or to possess with intent to
    distribute   khat,    a    fact    that      the    government      clearly   proved.
    12
    They   rightly    state   that   it   would   not   be   sufficient    for   the
    government   to   prove   scienter     as   to    the   distribution   of    khat
    because khat itself is not listed as a controlled substance.
    They argue that rather than instructing the jury on scienter as
    to the trafficking in cathinone, the district court relieved the
    government of this burden by instructing the jury as follows:
    The phrase “knowingly and intentionally,” as used in
    the offense charged in Count 1 of the superseding
    indictment, requires the government to prove beyond a
    reasonable doubt that a defendant knew that what he or
    she conspired to distribute or to possess with intent
    to distribute was or contained a controlled substance,
    meaning a substance that is illegal under the U.S.
    drug laws.
    *     *      *
    However, as long as you find that the government has
    proven beyond a reasonable doubt that a defendant knew
    that what he or she had conspired to distribute or to
    possess   with  intent   to   distribute contained   a
    substance that is illegal under the U.S. drug laws,
    you do not need to find that a particular defendant
    knew the precise nature or chemical name of the
    specific controlled substance.
    In other words, the government is not required to
    prove that the defendants knew that khat may contain a
    controlled  substance   with  the  chemical   name  of
    cathinone, but the government must prove beyond a
    reasonable doubt that the defendant knew that some
    controlled substance, that is, a substance that is
    illegal under the U.S. drug laws, was contained in the
    khat they allegedly conspired to distribute or to
    possess with intent to distribute.   The law does not
    require that a defendant . . . knew the proper
    chemical name of a substance so long as the defendant
    knew that a substance was illegal under the U.S. drug
    laws.
    (Emphasis added).
    13
    In short, the defendants maintain that “because conspiracy
    is a specific intent crime, . . . the government must prove
    [that the defendants] specifically knew cathinone, the substance
    alleged      by     the      grand       jury     in    Count       One,    was      a    controlled
    substance and that it was contained in khat.”                                   They argue that
    the    jury       could      have        “relied       on   evidence        that       khat    was    a
    controlled        substance”          because      of       the    nature       of   the      district
    court’s      instruction.                 They    conclude         that     “this        allowed     an
    impermissible constructive amendment of the indictment.”
    Generally, we review a district court’s decision whether to
    give an instruction or how to formulate an instruction for abuse
    of discretion.               See, e.g., Noel v. Artson, 
    641 F.3d 580
    , 586
    (4th   Cir.       2011).           But    we     review      the    correctness          of    a   jury
    instruction regarding the elements of an offense de novo, as a
    question of law.                 See United States v. Horton, 
    321 F.3d 476
    , 479
    (4th Cir. 2003).
    Count        1       of     the     superseding            indictment           charged       the
    defendants with conspiring, under 21 U.S.C. § 846, to violate
    the    drug       trafficking            prohibitions             contained       in     21    U.S.C.
    § 841(a)(1).            Because § 846 looks to an underlying offense, the
    mens   rea     of       §    846    is    derived       from       that    of    the     underlying
    offense,       in       this       case     § 841(a).              See     United        States      v.
    Deffenbaugh, 
    709 F.3d 266
    , 272 (4th Cir. 2013).
    14
    The mens rea of § 841(a) is articulated explicitly in the
    statute.       Section      841(a)   makes       it   unlawful    for   a   person
    “knowingly    or    intentionally     to     .    .   .   distribute    .   .    .    a
    controlled substance” or “knowingly or intentionally to . . .
    possess with intent to . . . distribute . . . a controlled
    substance.”        21 U.S.C. § 841(a)(1).             Thus, while the statute
    requires specific intent to distribute a controlled substance or
    to possess with intent to distribute a controlled substance, it
    does not require that the defendant have, within that intent,
    specific knowledge of the controlled substance or any of the
    chemicals, derivatives, isomers, esters, ethers, or salts that
    constitute the controlled substance.              See 21 U.S.C. § 812.
    Of course, the fact that the defendant must only know that
    the   khat    he   is   distributing       or    possessing      with   intent       to
    distribute contains an unspecified controlled substance does not
    relieve the government of proving that that substance was in
    fact on the controlled substance list.                    Thus, in this case it
    would not be sufficient for the government to prove that the
    substance distributed was khat, because khat is not listed as a
    controlled substance.         Rather, the government had to prove that
    the   khat    it   seized    from    the    defendants       actually   contained
    cathinone, a controlled substance.               As for mens rea, though, the
    government need only prove that the defendants knew that their
    15
    khat   contained    some   controlled    substance,   which    it   could    do
    without showing that the defendants had ever heard of cathinone.
    This scope of scienter for a violation of § 841 is not only
    provided by the text of the statute but is also the view taken
    by every court of appeals that has considered the issue.                    For
    instance, in United States v. Abdulle, 
    564 F.3d 119
    (2d Cir.
    2009), then-Judge Sotomayor stated:
    [T]he law is settled that a defendant need not know
    the exact nature of a drug in his possession to
    violate § 841(a)(1); it is sufficient that he [or she]
    be aware that he [or she] possesses some controlled
    substance.     Because khat is not listed on the
    controlled   substance   schedules,    the   mens  rea
    requirement of § 841(a) cannot be satisfied merely by
    proving that the defendant knowingly possessed khat.
    Instead, where the government seeks to satisfy the
    mens rea requirement of § 841(a) for a khat-related
    offense, the government must prove that the defendant
    knew he or she possessed some regulated substance.
    
    Id. at 125-26
    (internal quotation marks and citations omitted)
    (emphasis added); see also United States v. Mire, 
    725 F.3d 665
    ,
    679 (7th Cir. 2013) (“It does not matter whether Mire knew that
    khat contained cathinone or cathine; all that matters is Mire
    knew that khat contained an illegal substance”); United States
    v. Hassan, 
    578 F.3d 108
    , 123 (2d Cir. 2008) (Specific intent
    requires    “that    the    defendant    ‘knowingly   or      intentionally’
    imported   or   possessed   with   intent   to   distribute    khat   with   a
    controlled substance”); United States v. Caseer, 
    399 F.3d 828
    ,
    841 (6th Cir. 2005) (Defendant must only “actually [know] that
    16
    khat    contained   a   controlled     substance”);      United   States    v.
    Hussein, 
    351 F.3d 9
    , 11 (1st Cir. 2003) (“[T]he government can
    satisfy the scienter requirement . . . notwithstanding the fact
    that the accused was unaware of the drug’s precise identity so
    long as it is able to prove beyond a reasonable doubt that he
    knew he was dealing with a substance regulated by federal drug
    abuse laws”); United States v. Carrera, 
    259 F.3d 818
    , 830 (7th
    Cir. 2001) (“The government need only prove that the defendant
    was aware that some controlled substance was involved”).
    Accordingly, we conclude that the district court did not
    err in instructing the jury on scienter.
    B
    With   respect   to   the   willful   blindness    instruction,     the
    defendants argue that the district court abused its discretion
    in giving the instruction.         The court told the jury:
    Now, the government may prove that a defendant acted
    knowingly by proving beyond a reasonable doubt that
    the defendant deliberately closed his or her eyes to
    what would otherwise have been obvious to him or her.
    No one can avoid responsibility for a crime by
    deliberately ignoring what is obvious.       A finding
    beyond a reasonable doubt of an intent of the
    defendant to avoid knowledge or enlightenment would
    permit the jury to infer knowledge.     Stated another
    way, a defendant’s knowledge of a particular fact may
    be inferred from a deliberate or intentional ignorance
    or   deliberate  or   intentional  blindness   to  the
    existence of that fact.
    The defendants point out that such an instruction should not
    have been given without evidence that they deliberately ignored
    17
    relevant       facts.        They    maintain      that      in    this    case,       “[t]here
    simply is no evidence in record supporting the position that any
    [defendant]          understood        khat     contained          cathinone           or        any
    controlled substance.”
    Inasmuch as the defendants’ challenge focuses on whether
    the court should have given the instruction, and not on its
    substance,       we     review       the   court’s           decision      for        abuse       of
    discretion.       See United States v. Jinwright, 
    683 F.3d 471
    , 478
    (4th Cir. 2012).
    It is well established that where a defendant asserts that
    he did not have the requisite mens rea to meet the elements of
    the    crime    but     “evidence      supports         an   inference         of    deliberate
    ignorance,”       a    willful       blindness      instruction           to    the    jury       is
    appropriate.          United States v. Ruhe, 
    191 F.3d 376
    , 384 (4th Cir.
    1999) (quoting United States v. Gruenberg, 
    989 F.2d 971
    , 974
    (8th    Cir.    1993))       (internal     quotation         marks   omitted).              To    be
    sure, caution must be exercised in giving a willful blindness
    instruction,          and    therefore     it      is    appropriate           only    in     rare
    circumstances.          
    Id. at 385.
              But we have affirmed its use in
    circumstances         much    like    those     presented         here.         In    Ruhe,      the
    owner    of     an      aircraft      repair       facility        was         convicted         for
    conspiring       to    transport      stolen       airplane       parts        in    interstate
    commerce.        Although the owner of the facility did not himself
    know that the parts were stolen, he ignored warning signs from
    18
    his employees, such as a lack of documentation for the parts and
    labels of “To be scrapped” on the parts.                      
    Id. at 380-81.
              With
    those warning signs, we upheld the use of a willful blindness
    instruction.
    We conclude that Ruhe justifies the court’s instruction in
    this case.     The defendants here also had warning signs that khat
    contained    an   unlawful     substance.         The    record         is   filled    with
    evidence about how khat was transferred in discreet handoffs and
    unmarked packages; how the money obtained from khat sales was
    carefully broken up and hidden; how various defendants described
    methods     for     avoiding        detection;     how    khat          had    drug-like
    properties like other controlled substances; and how defendants
    sought fresh khat to maximize those drug-like properties.                               In
    these     circumstances,       we    believe      it    was       not    an    abuse    of
    discretion    for    the   court      to   have   given       a   willful      blindness
    instruction, particularly since the court also gave a cautionary
    instruction to the jury:
    It is, of course, entirely up to you as to whether you
    find any deliberate ignorance or deliberate closing of
    the eyes and the inferences to be drawn from any such
    evidence.   You may not infer that a defendant had
    knowledge, however, from proof of a mistake or
    negligence   or  carelessness  or   a  belief   in  an
    inaccurate proposition.
    19
    III
    For   their    principal       argument    on     appeal,   the   defendants
    contend that even under our announced standard, the evidence was
    insufficient to convict them on Count 1, which charged them with
    conspiring to traffic in the controlled substance of cathinone.
    They do not suggest that the evidence was insufficient to show
    that   they     possessed      khat     with    intent    to   distribute   it    but
    rather, that the evidence was insufficient to prove that they
    knew    that     khat       contained     a     controlled     substance.         The
    sufficiency of the evidence, which we take in the light most
    favorable to the government, is a question of law that we review
    de novo.       See United States v. Campbell, 
    977 F.2d 854
    , 856 (4th
    Cir. 1992).
    It is true that the record contains only limited direct
    evidence      that    the     defendants       knew    that    khat   contained     a
    controlled substance.          Gurreh clearly knew, as he had previously
    been convicted of trafficking in khat, and Ismail Abdi admitted
    in an interview with the FBI that he believed that khat was
    unlawful.       Similarly, Jibril and Yusuf both worked for a money
    transfer business, and as part of their employment, both men
    received training in identifying money transfers related to khat
    trafficking.         Nonetheless, all defendants conducted themselves
    in a manner that indicated circumstantially that they knew that
    khat contained a controlled substance.                     See United States v.
    20
    Santos, 
    553 U.S. 507
    , 521 (2008) (“[Scienter] will be provable
    (as   knowledge       must     always      be      proved)    by     circumstantial
    evidence”).
    Critically, the head of the conspiracy, Ishak, testified on
    behalf of the government and implicated all defendants in the
    conspiracy.        Numerous recorded telephone calls between him and
    his   co-conspirators        were   introduced       into    evidence     indicating
    that all conspirators were aware of the structure of Ishak’s
    enterprise    and    participated       in     various     aspects   of   it.     The
    enterprise involved importing khat from Kenya, through Europe,
    and into the United States via couriers, who carried packages
    designed to disguise their contents.                  Individual deliveries of
    khat to various conspirators were often made in circumstances
    that were surreptitious and totally distinguishable from open
    and normal channels of business, such as from a public store or
    a publicly accessible shopping site.                     Telephone conversations
    among conspirators often referred to methods of avoiding police
    suspicion and to interceptions of khat at the border.                           While
    interceptions at the border could, no doubt, be attributable to
    the enforcement of benign agricultural regulations, see 
    Caseer, 399 F.3d at 844
    ,    none    of      the    many     conversations      among
    conspirators even suggested that agricultural regulations were
    the cause of their concerns.              When the conspirators did discuss
    law enforcement, their concerns focused on avoiding detection by
    21
    state     and    local       police       officers,         who    presumably       would    be
    uninterested in enforcing U.S. customs regulations related to
    the importation of non-descript plants.                            Money collected from
    the sale of khat was also treated surreptitiously and awkwardly
    to avoid suspicion, as payments were broken into parts and sent
    to suppliers in the United Kingdom and Africa under altered or
    false names, and the record is replete with evidence of how such
    payments        were    designed          to     avoid      any        linkage     with     khat
    trafficking.           It    is    almost       impossible        to    conclude    that    any
    defendant did not know of at least some illegal aspects of the
    enterprise because the conspiracy continued for years.
    We find support in this regard in the decisions of numerous
    other courts that have accepted circumstantial evidence in khat
    cases of this type to prove scienter.                             Courts have concluded,
    for example, that evasive behavior that seeks to avoid police
    detection of khat activity, including a denial of owning khat,
    evinces    knowledge         that    khat       contains     a     controlled      substance.
    See 
    Mire, 725 F.3d at 679
    .                  Likewise does misleading the police
    during    interrogation,           id.;    discussing         with      other    conspirators
    how to best evade detection, see United States v. Awad, 518 F.
    Supp.     2d     577    (S.D.N.Y.         2007);       or     carefully         orchestrating
    distribution       in    a   way    so     as    to   evade       detection,      see     United
    States    v.    Hussein,      
    351 F.3d 9
    ,    20    (1st       Cir.   2003).       Other
    indicators have also been accepted as circumstantial evidence of
    22
    scienter, such as knowledge that khat produces a high much like
    other controlled substances, see id.; knowledge that khat can be
    seized at customs, see 
    Hassan, 578 F.3d at 126
    ; or the presence
    of defendant’s prior convictions involving khat or cathinone,
    
    Abdulle, 564 F.3d at 127
    .                 To be sure, because some of these
    indicators may be ambiguous, they must be taken in context and
    evaluated as to whether they in fact contribute to scienter.
    For example, simply recognizing that khat produces a high is
    ambiguous,       as    there   are    non-controlled      substances   that      also
    produce highs.          Similarly, the fact that khat has been seized at
    customs     is        ambiguous,     as    agricultural     products    that     are
    otherwise non-controlled substances may also be seized.                          See
    
    Caseer, 399 F.3d at 844
    .                  But when considered in the context
    provided by other evidence, even these facts may be probative of
    scienter.    See, e.g., 
    Hassan, 578 F.3d at 126
    .
    In addition to the generalized evidence about the structure
    and operation of the enterprise, aspects of which each defendant
    had knowledge, the government produced individualized evidence
    as to each defendant.          To be sure, the amount of evidence unique
    to each defendant varied, but even so, when it is considered in
    the   overall     context      and    in    a    light   most   favorable   to   the
    government, it is, we conclude, sufficient as to each defendant
    to support a conviction.
    23
    First,        Ismail       Abdi,      Gurreh,     Albukhaiti,        and     Hassan
    demonstrated their knowledge that khat was illegal through their
    direct   behavior        with    law    enforcement     officers.         Ismail    Abdi
    misled FBI agents during an interview, initially claiming that
    he did not chew khat but later admitting to khat use after being
    informed that agents had intercepted his telephone calls.                             He
    also admitted to agents that he believed that khat was unlawful
    and that transferring the proceeds of khat sales overseas was
    unlawful.     Likewise, Hassan initially claimed to FBI agents that
    he had never chewed or distributed khat, but then later claimed
    that he had used khat on “one or two occasions.”                      Eventually, he
    admitted      to    purchasing          and    using    khat       more     frequently.
    Albukhaiti, when stopped on a trip to New Jersey to pick up
    khat, lied to police, telling them that he was there to pick up
    a   friend.        Gurreh       had    a   prior     state   conviction      for    khat
    trafficking, which provided direct evidence that he knew that
    khat was illegal.           Moreover, all four of these defendants spoke
    frequently     with       Ishak       regarding    khat,     and     some    of    those
    discussions were about how to orchestrate khat transfers so as
    to avoid detection by using unmarked or mislabeled packages or
    by using fake names.
    Second,       Ali   and     Yusuf     demonstrated      their   knowledge      that
    khat was illegal during wiretap-recorded telephone conversations
    in which they discussed the concealment of khat proceeds.                            In
    24
    one such conversation, Ali and Ishak discussed how to break the
    money transfers into smaller amounts so as to avoid detection,
    explaining that they learned the technique from Yusuf:                            “If I
    would say 1,000 dollar he would have asked me if I got the money
    from    selling   khat. . . .       [I]t’s      better    to   send   it    in    small
    amounts,    instead   of    big   amounts. . . .          I    learned     that    from
    Osman [Yusuf]. . . .         When I give money I also give him two
    names.”     In another conversation, Yusuf discussed khat in code,
    using the term “CDs” to refer to khat because he and Ishak
    worried that authorities might be listening to their calls.                          In
    addition to these conversations, other circumstantial evidence
    demonstrated Ali’s and Yusuf’s knowledge of khat’s illegality.
    Ali used names other than her own to send proceeds from khat
    sales to Ishak’s suppliers and allowed Ishak to use her credit
    cards to rent cars in her name to conceal Ishak’s identity when
    distributing khat.         And Yusuf advised Ishak not to meet him at
    Yusuf’s Dahabshil office because it was known that Ishak was a
    khat dealer.      As noted, Yusuf was also trained as part of his
    Dahabshil employment to identify khat-related transfers, which
    is   more   direct    evidence      that   he    knew     that   it   contained       a
    controlled substance.
    Third, three other defendants, Muhumed, Isa, and Abdi Omar
    Abdi, demonstrated their knowledge that khat was illegal through
    their     attempts    to    evade    detection       in       acquiring     khat     or
    25
    laundering khat proceeds.        All three regularly purchased khat
    and helped send money to Ishak’s suppliers.                Muhumed regularly
    met Ishak in out-of-the-way locations, including bus stations
    and gas stations, to cover the purpose of their meetings.                  Isa
    received suspiciously packed shipments of khat from Ishak and
    also wrote checks to Ishak for khat, but concealed the purpose
    of the payments by writing “ATM” on the memo line.                  Abdi Omar
    Abdi was instructed by Ishak on how to conceal the transfer of
    money to avoid police detection by not sending the same amount
    of money on multiple occasions; by not sending it repeatedly to
    the same person; and by not using the recipient’s real name.
    Both Abdi Omar Abdi and Isa also knew that khat packages had
    been, on occasion, seized by customs.
    Fourth,     Jibril’s     conduct      involved    a     combination      of
    indicators   demonstrating     his    knowledge   that     khat   contained    a
    controlled substance.       In one recorded telephone conversation,
    Ishak discussed with Jibril how Ishak would avoid being detected
    by police while he traveled to distribute khat:               “I do not like
    people with me because . . . if something happens and you get
    stopped   they   cross-examine       us   separately   and   we   might    give
    different information.”        Additionally, as part of his job at
    Dahabshil,     Jibril   was     trained      to   recognize       and     avoid
    inadvertently aiding money laundering and trafficking, including
    trafficking related to khat.          He then completed transactions by
    26
    breaking them into smaller dollar amounts to avoid detection,
    and on at least one occasion, he used a false name to send the
    money.     One can infer that from Jabril’s training, he knew that
    the transactions were for the purpose of concealing illicit khat
    money.
    Finally,        while       the    defendants            Alashmali,        Salhan,     and
    Samantar    were       less     deeply     involved         in     the    conspiracy,        they
    nonetheless maintained regular contact with Ishak and knew the
    extent     of   the     khat       distribution           operation       that     Ishak     ran.
    Alashmali was aware of the suspicious circumstances under which
    khat was transferred from Ishak to the co-conspirators, as he
    himself received shipments from Ishak at diverse locations, such
    as   his   store,       a    UPS    store,      and       his     brother’s      store.       And
    evidence    showed          that   shipments         to     his    brother’s       store     were
    mislabeled to conceal their contents.                           Moreover, Alashmali spoke
    with Ishak almost daily, and Ishak knew that khat was illegal.
    Alashmali also interacted regularly with his brother Albukhaiti,
    who demonstrated his knowledge of khat’s illegal nature by lying
    to police.       Likewise, Salhan discussed khat with Ishak regularly
    and sold khat.              He knew the extent of the khat distribution
    enterprise;       he    knew       that    khat       had       been    seized     by     customs
    officials; and twice he sent khat money overseas, using a wire
    transfer.       Finally, Samantar resold khat; spoke with Ishak about
    khat     trafficking;          sent      wire     transfers            overseas     for     Ishak
    27
    approximately three times; and knew that customs officials had,
    on occasion, seized khat packages.                Indeed, she inquired about a
    khat shipment with concern, “Was it caught?”
    When viewing the evidence in a light most favorable to the
    government, we conclude that a rational trier of fact could have
    found   the    defendants      guilty      beyond    a   reasonable      doubt.       See
    
    Campbell, 977 F.2d at 856
    .
    IV
    During       trial,   the      district     court    made      two     procedural
    rulings that the defendants now challenge.                       It denied (1) the
    defendants’ request to put on an expert witness who was first
    disclosed at trial, and (2) Gurreh’s motion to sever his trial
    from the larger one.         We affirm both rulings.
    A
    After the government rested its case, the defendants sought
    to   present       the   testimony    of    an    expert   witness       who   had    not
    previously been identified to testify.                   The defendants proposed
    to   have     him    testify      that     khat     contained,      in     addition     to
    cathinone, the stimulant phenylpropanolamine (“PPA”), which is
    not a controlled substance and which contributes to the high
    produced      by    khat.    They     argued      that    because    PPA     is   not   a
    controlled substance and also produces a high, “there could be a
    conspiracy to possess with intent to distribute an uncontrolled
    28
    scheduled      substance         PPA,   which    is    a    direct   defense   to    the
    government’s case. . . .                 PPA is a stimulant and you can get
    high and it’s not controlled.               So how do you separate the two?”
    (Emphasis added).
    The district court, in ordering that the expert testimony
    be excluded, ruled that the defendants’ request was untimely,
    pointing out that notice of expert testimony had to be provided
    no later than 10 business days before trial.                       It also ruled that
    the evidence was irrelevant.               The court observed that it invited
    the defendants to articulate the reasons for the testimony’s
    relevancy and “found them unpersuasive.”
    On    the    untimeliness        issue,   the       court   clearly   had   broad
    discretion         to   manage    the   docket    and      to   impose   binding    time
    limits on the disclosure of evidence.                      See, e.g., United States
    v. Goodson, 
    204 F.3d 508
    (4th Cir. 2000); Fed. R. Crim. P. 16.
    The court pointed out that the defendants had received notice of
    the fact that PPA was in khat many months before trial and could
    well have identified their expert on the subject in a timely
    fashion.       It did not agree that their failure to do so was
    excused by the fact that not until trial did they realize that
    they would be unable to question the government’s expert about
    PPA.        We conclude the court did not abuse its discretion in
    excluding this evidence as untimely.
    29
    We also agree that the proffered evidence would not have
    been     relevant.          The    issue      in     this    case        was   whether     the
    defendants      knowingly         distributed       or   possessed        with   intent      to
    distribute      a     controlled       substance.           The    government       had    the
    burden     of        demonstrating         that       the       defendants         knowingly
    distributed or possessed with intent to distribute a controlled
    substance,      and       the   mere   fact   that       khat     also    contained      other
    chemicals and substances that were not controlled but that were
    sought     by   defendants         would      not     provide      a     defense    to      the
    government’s proof as to the defendant’s mental state.                              Thus, we
    conclude that the district court did not abuse its discretion in
    also basing its ruling on a lack of relevance.                                 See General
    Electric Co. v. Joiner, 
    522 U.S. 136
    , 138-39 (1997); Friendship
    Heights Assocs. v. Vlastimil Koubek, A.I.A., 
    785 F.2d 1154
    , 1159
    (4th Cir. 1986).
    B
    During       the    government’s       case,      counsel         for   Ismail      Abdi
    cross-examined Ishak with respect to Gurreh’s involvement in the
    conspiracy,         allegedly      creating         antagonistic         defenses     as    to
    Ismail Abdi and Gurreh.                The cross-examination mainly covered
    the extent of Gurreh’s relationship with Ishak, the amount of
    khat Gurreh sold, and the extent of Gurreh’s money laundering.
    Following this cross-examination, Gurreh filed a motion to sever
    his trial, which the district court denied.
    30
    Federal Rule of Criminal Procedure 14(a) provides, “If the
    joinder     of   offenses    or   defendants   in    an   indictment,     an
    information, or a consolidation for trial appears to prejudice a
    defendant or the government, the court may order separate trials
    of counts, sever the defendants’ trials, or provide any other
    relief that justice requires.”         A severance under Rule 14(a) is
    warranted in cases where there is a “serious risk that a joint
    trial would compromise a specific trial right of one of the
    defendants,” Zafiro v. United States, 
    506 U.S. 534
    , 539 (1993),
    but the standard raises a high bar, as “[m]utually antagonistic
    defenses are not prejudicial per se,” 
    id. at 538.
                  Indeed, we
    have found it decidedly preferential to try jointly defendants
    who have been indicted together.           See, e.g., United States v.
    Singh, 
    518 F.3d 236
    , 255 (4th Cir. 2008).
    In this case, the testimony elicited about Gurreh during
    the cross-examination of Ishak by counsel for Ismail Abdi was
    very likely not prejudicial for at least two reasons.               First,
    nearly the exact same testimony raised on Ismail Abdi’s cross-
    examination of Ishak was also permissibly brought out during the
    government’s direct examination of Ishak.           Second, the testimony
    brought out during Ismail Abdi’s cross-examination of Ishak did
    not make a meaningful contribution to the case against Gurreh.
    Gurreh’s involvement with Ishak and the khat enterprise was not
    seriously    disputed   at   trial.    Based   on   Ishak’s   testimony   on
    31
    direct,    there      was    little      doubt    about       Gurreh’s    involvement.
    Instead,     the    primary    issue     raised    by     Gurreh   was    scienter    --
    whether he knew that khat contained a controlled substance.                          To
    that end, Gurreh’s prior conviction for khat trafficking was
    very strong evidence -- so much so that the additional evidence
    of Gurreh’s involvement with Ishak brought out on Ismail Abdi’s
    cross-examination was of minimal importance.
    Given our strong preference for jointly trying defendants
    who   have    been     indicted     together,        we   conclude       that   in   the
    circumstances of this case, the district court did not abuse its
    discretion in denying Gurreh’s motion to sever.
    V
    Finally, the nine defendants convicted on Count 2 challenge
    the sufficiency of the indictment, alleging that its lack of
    specificity        “left    open   the   real    possibility       the    [defendants]
    were convicted on the basis of facts not found by and perhaps
    not even presented to, the grand jury which indicted them.”                           In
    particular, they contend that the indictment neglected to allege
    the   financial      transactions        involved,      the    monetary    instruments
    and funds transferred, and the related unlawful activity.                            See
    18 U.S.C. § 1956(c)(4)-(5), (7).
    We have previously articulated the standard for assessing
    the specificity of an indictment, stating that “[a]n indictment
    32
    is sufficient if it, first, contains the elements of the offense
    charged and fairly informs a defendant of the charge against
    which   he    must        defend,      and,    second,       enables     him    to    plead   an
    acquittal or conviction in bar of future prosecutions for the
    same offense.”            United States v. Brandon, 
    298 F.3d 307
    , 310 (4th
    Cir. 2002) (quoting Hamling v. United States, 
    418 U.S. 87
    , 117
    (1974)) (internal quotation marks omitted); see also Fed. R.
    Crim. P. 7(c)(1).
    In Count 2, the grand jury charged a violation of 18 U.S.C.
    § 1956(h),      setting        forth          all     of     the     statutory       elements,
    including       the        allegations         that         the     defendants       conducted
    financial      transactions            involving        the       proceeds     of     specified
    unlawful      activity;       that      they    transmitted          monetary       instruments
    and funds from the United States to places outside of the United
    States to promote the carrying on of the unlawful activity; and
    that    the   underlying          unlawful      activity          was   the    conspiracy     to
    distribute or to possess with intent to distribute a controlled
    substance.           In    arguing      that        these    allegations       were    fatally
    nonspecific, the defendants fail to recognize that the first
    paragraph      of    Count    2     incorporated           by     reference    the    37    other
    paragraphs          alleged       in     the        introductory         portion       of     the
    indictment, where the specific transactions, funds, and related
    unlawful activity were described.                      These paragraphs spelled out
    in detail the factual circumstances describing:                                 how the co-
    33
    conspirators            derived     proceeds        from     the     sale        of     khat    and
    transmitted them to their khat suppliers in England, Somalia,
    Uganda, and Kenya; the fact that the transfers of proceeds were
    accomplished            through       Dahabshil’s          office        in     Falls      Church,
    Virginia;         and    the    specific       dates       of    transfers,           giving    the
    countries to which the transfers were made.
    We have routinely found indictments with this degree of
    specificity, or less, to be adequate.                              See United States v.
    Bolden, 
    325 F.3d 471
    , 490-91 (4th Cir. 2003); United States v.
    Am.       Waste    Fibers      Co.,    
    809 F.2d 1044
      (4th         Cir.    1987)    (per
    curiam).
    Defendants also argue that the required unlawful activity
    of    §    1956(c)(7),         as   defined    in     §    1961(1),       does       not   include
    conspiracy.         We rejected similar reasoning, however, in United
    States v. Tillett, 
    763 F.2d 628
    , 633 (4th Cir. 1985), and other
    circuits have directly rejected this very argument.                                   See, e.g.,
    United States v. Echeverri, 
    854 F.2d 638
    , 648-49 (3d Cir. 1988)
    (describing         §    1961(D)      as     “broad       language”       that        encompasses
    conspiracy); United States v. Weisman, 
    624 F.2d 1118
    , 1124 (2d
    Cir.      1980),    abrogated         on   other     grounds        by    United       States    v.
    Indelicato, 
    865 F.2d 1370
    (2d Cir. 1989) (en banc) (“[W]e think
    that conspiracy can properly be charged as a predicate act of
    racketeering under RICO, at least when it involves any of the
    substantive offenses listed in section 1961(1)(D) . . . This
    34
    language    is     certainly    broad   enough     on   its   face   to    include
    conspiracies involving securities and bankruptcy fraud and drug
    related offenses”).       We now also reject the argument.
    Because we conclude that Count 2 adequately informed the
    defendants    of    the   money    laundering    charges      against     them   and
    provided sufficient detail to enable them to plead an acquittal
    or conviction in bar of future prosecution for the same offense,
    we reject their challenge.
    The     judgments     of     the   district    court      are   accordingly
    affirmed.
    AFFIRMED
    35