United States v. Benjamin Galecki , 932 F.3d 176 ( 2019 )


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  •                                     PUBLISHED
    UNITED STATES COURT OF APPEALS
    FOR THE FOURTH CIRCUIT
    No. 18-4727
    UNITED STATES OF AMERICA,
    Plaintiff – Appellee,
    v.
    BENJAMIN GALECKI,
    Defendant – Appellant.
    No. 18-4730
    UNITED STATES OF AMERICA,
    Plaintiff – Appellee,
    v.
    CHARLES BURTON RITCHIE,
    Defendant – Appellant.
    Appeals from the United States District Court for the Eastern District of Virginia, at
    Newport News. Raymond A. Jackson, District Judge. (4:15-cr-00018-RAJ-LRL-1; 4:15-
    cr-00018-RAJ-LRL-2)
    Argued: March 19, 2019                                        Decided: July 29, 2019
    Before AGEE and FLOYD, Circuit Judges, and DUNCAN, Senior Circuit Judge.
    Affirmed in part, reversed in part, vacated, and remanded by published opinion. Judge
    Agee wrote the opinion, in which Judge Floyd and Senior Judge Duncan joined.
    ARGUED: J. Lloyd Snook, III, SNOOK & HAUGHEY, P.C., Charlottesville, Virginia,
    for Appellants. Eric Matthew Hurt, OFFICE OF THE UNITED STATES ATTORNEY,
    Newport News, Virginia, for Appellee. ON BRIEF: Christian L. Connell, Norfolk,
    Virginia, for Appellant Benjamin Galecki. G. Zachary Terwilliger, United States
    Attorney, Alexandria, Virginia, Kevin Hudson, Assistant United States Attorney,
    OFFICE OF THE UNITED STATES ATTORNEY, Newport News, Virginia, for
    Appellee.
    2
    AGEE, Circuit Judge:
    A federal jury convicted Benjamin Galecki and Charles Burton Ritchie
    (“Defendants”) of charges related to a conspiracy to distribute controlled substance
    analogues. Defendants then appealed to this Court for the first time, challenging several
    of the trial court’s rulings, including the failure to compel a Drug Enforcement
    Administration (DEA) chemist to testify on their behalf, the exclusion of certain
    evidence, and the formulation of a jury instruction. In that appeal, we upheld the jury
    instruction, but vacated Defendants’ convictions and remanded the case for the district
    court to determine whether the DEA chemist’s testimony was material to their case.
    United States v. Ritchie, 734 F. App’x 876 (4th Cir. 2018) (Ritchie II). On remand, the
    district court held the chemist’s testimony was not material and declined to compel his
    presence at trial. United States v. Ritchie, No. 4:15-cr-18, 
    2018 WL 4693811
    (E.D. Va.
    Sept. 28, 2018) (Ritchie III). Defendants now appeal that decision and renew several
    other evidentiary challenges that we declined to address in the prior appeal. As discussed
    below, we affirm in part, reverse in part, vacate Defendants’ convictions, and remand for
    a new trial.
    I.
    A.
    Federal law prohibits the distribution of a controlled substance analogue. See 21
    U.S.C. §§ 813, 841(a)(1). The Analogue Act defines “controlled substance analogue” as
    3
    a substance—
    (i) the chemical structure of which is substantially similar to the
    chemical structure of a controlled substance in schedule I or II;
    (ii) which has a stimulant, depressant, or hallucinogenic effect on the
    central nervous system that is substantially similar to or greater than the
    stimulant, depressant, or hallucinogenic effect on the central nervous
    system of a controlled substance in schedule I or II; or
    (iii) with respect to a particular person, which such person represents or
    intends to have a stimulant, depressant, or hallucinogenic effect on the
    central nervous system that is substantially similar to or greater than the
    stimulant, depressant, or hallucinogenic effect on the central nervous
    system of a controlled substance in schedule I or II.
    21 U.S.C. § 802(32)(A). Because an Analogue Act conviction requires proof of a
    defendant’s knowledge and intent, that is, his mens rea, the Government must show that
    he knew either that the substance at issue is a controlled substance or that it is
    “substantially similar” to a controlled substance in both chemical structure and
    physiological effects. See 
    id. This Court
    has explained that a person has violated the
    Analogue Act if he
    (1) distributed a substance that had the chemical structure of an analogue
    and the actual, intended, or claimed physiological effects of an analogue;
    (2) intended that the substance be used for human consumption; and (3)
    knew either the legal status of the substance, or the chemical structure and
    physiological effects of that substance.
    United States v. McFadden, 
    823 F.3d 217
    , 223 (4th Cir. 2016).
    B.
    From 2010 to 2013, Defendants operated Zencense Incenseworks, LLC, which
    had facilities in Pensacola, Florida, and Las Vegas, Nevada. Zencense manufactured and
    sold a substance commonly called “spice,” which contained a mix of crushed leaves and
    4
    chemical additives. Consumers would generally smoke the spice, but Defendants
    packaged the product as “incense” and labeled it “Not for human consumption.” J.A. 633.
    In late March or early April 2012, Defendants began using the chemical additives XLR-
    11 and UR-144 in their manufactured spice. These additives were not on the controlled
    substances drug schedule during the time period of the alleged conspiracy (February 8,
    2012 to April 30, 2013). 1 Defendants shipped their product around the country for sale by
    various retailers, including one in Hampton Roads, Virginia, which received a shipment
    on August 9, 2012. 2
    The Government had begun investigating Zencense’s operations because it
    suspected Defendants’ “incense” was actually synthetic marijuana, i.e., a substance
    “designed and intended to have an effect similar to controlled substances” (marijuana)
    when smoked. J.A. 110. In the Government’s view, this physiological effect, coupled
    with the chemical similarity of the additive XLR-11 to the controlled chemical in
    marijuana, JWH-018, makes Defendants’ spice a controlled substance analogue within
    the meaning of 21 U.S.C. § 802(32)(A). On that basis, the Government charged
    Defendants with conspiring to distribute controlled substances and controlled substance
    analogues, in violation of 21 U.S.C. §§ 846, 813; using a communication facility to
    promote unlawful activity, in violation of 21 U.S.C. § 843(b) and 18 U.S.C. § 2; using a
    facility in interstate commerce to promote unlawful activity, in violation of 18 U.S.C.
    1
    XLR-11 and UR-144 have been treated as identical substances in this case.
    Unless otherwise stated, reference to one is reference to the other.
    2
    Though the shipment may have occurred on August 8, 2012, the invoice is dated
    August 9, so we rely on that date.
    5
    §§ 1952(a)(3), 2; and distributing controlled substances and controlled substance
    analogues, in violation of 21 U.S.C. § 841(a)(1), (b)(1)(C) and 18 U.S.C. § 2.
    At Defendants’ joint trial, the Government had to prove a scientific element as to
    the spice and a mens rea element as to each Defendant. To establish the scientific
    element, the Government had to show that XLR-11 in the spice had properties
    “substantially similar” to the properties of JWH-018 in marijuana. See 21 U.S.C.
    § 802(32)(A). And to establish the mens rea element, the Government had to satisfy one
    of two methods of proof: either that Defendants knew XLR-11 was a controlled
    substance analogue or that they knew the “chemical structure and physiological effects”
    of XLR-11 were substantially similar to those of JWH-018. See 
    McFadden, 823 F.3d at 223
    . The Government proceeded under the second method of proof and attempted to
    “establish that ‘the defendant knew the specific analogue he was dealing with, even if he
    did not know its legal status as an analogue.’” 
    Id. (quoting McFadden
    v. United States,
    
    135 S. Ct. 2298
    , 2305 (2015)). “Under this second method of proof, knowledge of the
    substance’s chemical structure and physiological effects is sufficient to support a
    conviction.” 
    Id. Defendants challenged
    both the scientific and mens rea elements of the
    Government’s case, contending XLR-11 is not chemically similar to JWH-018 and
    asserting they lacked knowledge of any similarity between the structures or physiological
    effects of the two chemicals.
    Defendants’ first trial resulted in a hung jury on each count. During a second trial,
    the jury indicated it was at an impasse on the issue of substantial similarity, and the
    6
    district court issued an Allen charge. 3 The jury then convicted Defendants of all counts.
    C.
    Defendants appealed, challenging a number of the trial court’s rulings. Our
    opinion addressed only two issues: the court’s refusal to compel DEA chemist Dr. Arthur
    Berrier to testify for Defendants and its formulation of a mens rea jury instruction. See
    Ritchie II, 734 F. App’x at 878–81.
    Defendants framed Dr. Berrier’s exclusion from trial as a Sixth Amendment
    compulsory process violation. See 
    id. at 878–79.
    Under the Sixth Amendment, a criminal
    defendant “enjoy[s] the right . . . to have compulsory process for obtaining witnesses in
    his favor.” U.S. Const. amend. VI. Though “not absolute,” United States v. Prince-Oyibo,
    
    320 F.3d 494
    , 501 (4th Cir. 2003), this right is violated when a defendant is “arbitrarily
    deprived of testimony that would have been relevant and material, and vital to the
    defense,” United States v. Valenzuela-Bernal, 
    458 U.S. 858
    , 867 (1982) (internal
    quotation marks, alterations, and emphases omitted). To establish a Sixth Amendment
    violation, a criminal defendant “must at least make some plausible showing of how [the
    excluded] testimony would have been both material and favorable to his defense.” 
    Id. Exercising their
    compulsory process rights prior to trial, Defendants issued a
    “Touhy request” 4 to the Government along with a subpoena for Dr. Berrier. 5 The
    
    3 Allen v
    . United States, 
    164 U.S. 492
    (1896). See United States v. Cornell, 
    780 F.3d 616
    , 625 (4th Cir. 2015) (explaining that an Allen charge is a supplemental jury
    instruction given “when the jury has reached an impasse in its deliberations and is unable
    to reach a consensus”).
    7
    Government denied the Touhy request, claiming Dr. Berrier’s opinion formed in the
    course of his employment with the DEA was covered by the Government’s deliberative
    process privilege. See Dep’t of Interior v. Klamath Water Users Protective Ass’n, 
    532 U.S. 1
    , 8 (2001) (noting the deliberative process privilege covers written “opinions,
    recommendations and deliberations comprising part of a process by which governmental
    decisions and policies are formulated” (internal quotation marks omitted)). The district
    court agreed with the Government and quashed the subpoena, thereby rejecting
    Defendants’ compulsory process arguments. When Defendants challenged the district
    court’s privilege ruling on appeal, we held that the Government had waived its privilege
    as to Dr. Berrier’s XLR-11 opinion because he had offered it in other cases and made it
    publicly available online. Ritchie II, 734 F. App’x at 879. But we then noted that
    [t]he absence of a privilege does not end the inquiry, however, because the
    Defendants’ compulsory process right extends only to “favorable” and
    “material” witnesses and evidence. Dr. Berrier’s testimony is clearly
    favorable to the Defendants, but the district court did not consider
    materiality, and we leave it to that court to determine in the first instance. If
    Dr. Berrier’s testimony is material and otherwise admissible, the
    4
    United States ex rel. Touhy v. Ragen, 
    340 U.S. 462
    (1951). Under 5 U.S.C. § 301
    and Touhy, federal agencies may regulate their employees’ ability to testify about their
    work, United States v. Soriano-Jarquin, 
    492 F.3d 495
    , 504 (4th Cir. 2007), but criminal
    defendants may seek such agency employees’ testimony at trial via what are now termed
    “Touhy requests,” see id.; Smith v. Cromer, 
    159 F.3d 875
    , 879 (4th Cir. 1998) (describing
    the interplay of Touhy requests and witness subpoenas).
    5
    Dr. Berrier is no longer a DEA employee, but whether the district court properly
    excluded his testimony depends on the facts before the district court when Defendants
    issued the Touhy request to the Government. See Hertz v. Luzenac Am., Inc., 
    370 F.3d 1014
    , 1019 (10th Cir. 2004) (“As a reviewing court, we may only ‘evaluate the trial
    court’s decision from its perspective when it had to rule and not indulge in review by
    hindsight.’” (quoting Old Chief v. United States, 
    519 U.S. 172
    , 182 n.6 (1997))).
    8
    Defendants’ Sixth Amendment rights were violated by his exclusion from
    the trial.
    
    Id. We vacated
    Defendants’ convictions and remanded to the district court the initial
    determination of whether Dr. Berrier’s testimony would be material. Further, we
    exercised our discretion to address Defendants’ challenge to the jury instruction as that
    issue was “likely to recur” and then affirmed the district court’s use of the instruction. 
    Id. (quoting United
    States ex rel. Drakeford v. Tuomey Healthcare Sys., Inc., 
    675 F.3d 394
    ,
    406 (4th Cir. 2012)).
    On remand, the district court concluded that Dr. Berrier’s testimony was not
    material to Defendants’ case because it would have been “merely cumulative” to
    testimony from Defendants’ two other expert chemists. Ritchie III, 
    2018 WL 4693811
    , at
    *4. The district court determined that those chemists used the same methods and came to
    the same conclusion as Dr. Berrier, and that his “position at the DEA would not provide
    any new relevant information” to the jury. 
    Id. The court
    accordingly held that Dr.
    Berrier’s exclusion from the trial did not violate Defendants’ Sixth Amendment
    compulsory process rights.
    Defendants now bring a second appeal. 6    7
    6
    Unless otherwise stated, all references to rulings made “at trial” refer to the
    district court’s rulings applicable to Defendants’ second trial, which occurred before the
    first appeal and remand.
    7
    While it is unclear whether Galecki joined all of Ritchie’s arguments below, he
    has joined Ritchie’s briefs on appeal and has not indicated that he departs from any of
    Ritchie’s arguments. We will therefore assume that Galecki joins all of Ritchie’s
    (Continued)
    9
    II.
    A.
    To challenge the scientific element of the Government’s case—that XLR-11 is
    substantially similar to JWH-018—Defendants sought to compel the expert testimony of
    Dr. Berrier, a Senior Research Chemist in the DEA’s Office of Forensic Sciences
    (“OFS”). Dr. Berrier would have opined that XLR-11 and JWH-018 are not substantially
    similar in chemical structure. While another DEA office, the Drug and Chemical
    Evaluation Section (“DRE”) in the Office of Diversion Control, ultimately classifies
    controlled substance analogues, it regularly consults the OFS before making its decisions.
    As an OFS chemist, Dr. Berrier routinely analyzed synthetic substances for the DRE and
    gave his opinion on their substantial similarity to controlled substances. In the spring of
    2012, the DRE asked Dr. Berrier to compare UR-144 to JWH-018. 8 He concluded that
    they are not substantially similar in chemical structure. But ultimately, after the charged
    events, the DRE determined that UR-144 and JWH-018 are substantially similar, making
    UR-144 a controlled substance analogue. The DEA formally added UR-144 and XLR-11
    to the controlled substances drug schedule in 2013, after the alleged conspiracy ended.
    arguments. Moreover, where the district court’s rulings applied equally to Defendants
    because they were business partners in constant communication during the alleged
    conspiracy and did not seek severance of their joint trial, our holdings apply to both
    Defendants as well. See United States v. Ullah, 
    976 F.2d 509
    , 514 (9th Cir. 1992) (“[I]t is
    manifestly unjust to reverse the conviction of one co-defendant but to uphold the
    conviction of another co-defendant when the same error affected both defendants.”
    (internal quotation marks omitted)).
    8
    Dr. Berrier analyzed UR-144 for the DRE, but it is undisputed that his opinion
    would have applied to XLR-11 as well.
    10
    Defendants argued that Dr. Berrier’s testimony was crucial to their case, as he was
    a DEA synthetic cannabinoid expert with a dissenting view—a view demonstrating that
    even highly-trained Government employees disagreed about the substantial similarity of
    XLR-11 and JWH-018. Indeed, one of the Government’s expert witnesses at trial was Dr.
    Jordan Trecki, a pharmacologist in the DRE section of the DEA who testified about the
    effects and substantial similarity of XLR-11 to JWH-018. As discussed above,
    Defendants unsuccessfully sought to compel Dr. Berrier’s testimony on their behalf.
    Barred from questioning Dr. Berrier, Defendants relied on the expert testimony of
    two chemistry professors, Drs. Croatt and Dudley, who gave the same opinion that Dr.
    Berrier would have given—an opinion that contradicted Dr. Trecki’s. During cross-
    examination, the Government questioned Defendants’ “hired guns” about the
    compensation they received for testifying. In convicting Defendants, the jury ultimately
    rejected Drs. Croatt and Dudley’s expert opinion about XLR-11 and JWH-018.
    B.
    In this appeal, we are reviewing the district court’s determination that Dr. Berrier’s
    exclusion from trial did not violate Defendants’ Sixth Amendment rights since his
    testimony would have been cumulative and not material to their defense. We disagree and
    therefore reverse the district court’s materiality finding, vacate Defendants’ convictions,
    and remand for a new trial. See United States v. Rhynes, 
    218 F.3d 310
    , 323 (4th Cir.
    2000) (en banc) (holding that a Sixth Amendment constitutional violation occurred and
    remanding for a new trial).
    11
    C.
    Before addressing the materiality issue on the merits, we first note that it is unclear
    what standard of review applies to a materiality ruling in the Sixth Amendment context.
    We and our sister circuits apply no uniform standard of review to either the issue of
    materiality in a compulsory process challenge or to evidentiary issues underlying general
    Sixth Amendment challenges.
    With regard to compulsory process claims, our sister circuits apply both the de
    novo and abuse of discretion standards of review, even at times applying different
    standards in the same circuit without explanation. Compare United States v. Tuma, 
    738 F.3d 681
    , 688 (5th Cir. 2013) (reviewing compulsory process claim de novo), United
    States v. Damra, 
    621 F.3d 474
    , 485 (6th Cir. 2010) (same), United States v. Bahamonde,
    
    445 F.3d 1225
    , 1228 (9th Cir. 2006) (same), and United States v. Serrano, 
    406 F.3d 1208
    , 1214–15 (10th Cir. 2005) (same), with United States v. Ross, 
    703 F.3d 856
    , 877–78
    (6th Cir. 2012) (reviewing compulsory process claim for abuse of discretion), United
    States v. Youngman, 
    481 F.3d 1015
    , 1017 (8th Cir. 2007) (same), and United States v.
    Gary, 
    74 F.3d 304
    , 309–10 (1st Cir. 1996) (same). Within the compulsory process
    context, it is often unclear what standard of review applies to an underlying materiality
    issue like the one presented here.
    Not only that, but the circuits take a variety of approaches to reviewing Sixth
    Amendment claims that stem from issues like the exclusion of evidence or the denial of a
    motion to continue. Compare United States v. Rivas, 
    831 F.3d 931
    , 934 (7th Cir. 2016)
    (reviewing an evidentiary ruling for abuse of discretion but reviewing the overarching
    12
    Sixth Amendment Confrontation Clause claim de novo), and United States v. Woodard,
    
    699 F.3d 1188
    , 1193–94 (10th Cir. 2012) (reviewing an evidentiary ruling de novo
    because the defendant framed it as a Confrontation Clause violation), with United States
    v. Blum, 
    62 F.3d 63
    , 67 (2d Cir. 1995) (reviewing an evidentiary ruling for abuse of
    discretion without announcing a separate standard of review for the overarching
    compulsory process challenge).
    Consequently, when faced with an issue presented under the Sixth Amendment,
    our sister courts often decline to decide the standard of review question and instead
    analyze the district court’s ruling under either standard. E.g., United States v. Epskamp,
    No. 15-2028-cr, 
    2016 WL 4191126
    , at *2 (2d Cir. Aug. 5, 2016) (summary order)
    (affirming under either standard of review the district court’s refusal to postpone a trial
    despite the government’s failure to secure testimony of an individual incarcerated outside
    the United States); United States v. Ladoucer, 
    573 F.3d 628
    , 634–35 (8th Cir. 2009)
    (affirming under either standard of review the district court’s refusal to postpone a trial
    despite a defense witness’s failure to appear).
    Another common approach we often employ is simply refraining from announcing
    a separate standard of review for each issue. See United States v. Beyle, 
    782 F.3d 159
    ,
    171 (4th Cir. 2015) (announcing no standard for reviewing the overarching compulsory
    process challenge and reviewing the district court’s refusal to compel witnesses for abuse
    of discretion); United States v. Woods, 
    710 F.3d 195
    , 200–02 (4th Cir. 2013) (doing the
    same and reviewing the district court’s exclusion of testimony for abuse of discretion);
    United States v. Passaro, 
    577 F.3d 207
    , 221 (4th Cir. 2009) (doing the same and
    13
    reviewing the district court’s quashing of subpoenas to CIA officials for abuse of
    discretion); 
    Soriano-Jarquin, 492 F.3d at 497
    , 501–02 (doing the same and reviewing the
    district court’s denial of a motion to dismiss the indictment de novo); 
    Cromer, 159 F.3d at 882
    –83 (doing the same and reviewing the district court’s grant of a protective order
    quashing subpoenas de novo); United States v. Espinoza, 
    641 F.2d 153
    , 159 (4th Cir.
    1981) (doing the same and reviewing the district court’s refusal to issue subpoenas for
    abuse of discretion).
    Here, the district court found Dr. Berrier’s testimony immaterial and then
    excluded him from trial by declining to compel him to testify. The Parties seem to agree
    that the exclusion of Dr. Berrier was an evidentiary ruling, which we review for abuse of
    discretion and harmlessness, United States v. McLean, 
    715 F.3d 129
    , 143 (4th Cir. 2013),
    but they do not directly address the standards of review applicable to the underlying
    materiality ruling or the overarching Sixth Amendment claim.
    When previously faced with a materiality question similar to the one Defendants
    now present, we declined to decide it and instead affirmed under either standard of
    review. United States v. Moussaoui, 
    382 F.3d 453
    , 473 n.22 (4th Cir. 2004) (“The parties
    dispute whether the materiality determinations by the district court [in a compulsory
    process claim] are reviewed de novo or for abuse of discretion. We do not decide this
    question . . . .”). And we need not decide this question here. Under either standard, we
    would reverse the district court’s finding that Dr. Berrier’s testimony was not material
    and reverse its exclusion of his testimony. Therefore, we will refrain from announcing the
    14
    standard of review applicable to the underlying materiality determination or to the
    overarching Sixth Amendment compulsory process challenge.
    For conducting the materiality analysis on the merits, however, we do have clear
    guidance from the Supreme Court in 
    Valenzuela-Bernal. 458 U.S. at 867
    –74. In that case,
    the Court concluded the district court properly denied the defendant’s motion to dismiss
    the indictment on compulsory process grounds because, although the Government had
    removed potential defense witnesses from the country, the defendant had failed to
    “explain what material, favorable evidence the deported [witnesses] would have provided
    for his defense.” 
    Id. at 874.
    In deciding Valenzuela-Bernal, the Supreme Court noted that
    materiality has several components: it must be exculpatory; it must be “not merely
    cumulative to the testimony of available witnesses;” it must present “a reasonable
    likelihood that the testimony could have affected the judgment of the trier of fact;” and it
    must be otherwise admissible. See 
    id. at 873–74.
    A district court assessing the materiality
    of evidence must address these components in the context of the entire record. 
    Id. at 874;
    see 
    Moussaoui, 382 F.3d at 472
    .
    D.
    The district court “assume[d] for the sake of argument that Dr. Berrier’s testimony
    may have been admissible and exculpatory,” Ritchie III, 
    2018 WL 4693811
    , at *3, and
    rested its materiality decision on the testimony being cumulative. In particular, the court
    determined Dr. Berrier’s testimony would have been cumulative because Drs. Croatt and
    Dudley gave the same opinion and used the same methods as Dr. Berrier. Because the
    15
    jury had rejected the testifying experts’ opinion, the district court held that Dr. Berrier’s
    similar testimony would not have altered the trial’s outcome.
    We can easily affirm the district court’s decision on two of the components of
    materiality, as Dr. Berrier’s testimony was indeed exculpatory and admissible. It was
    exculpatory because Defendants could have supported their case theory—that the
    substantial similarity of XLR-11 and JWH-018 was a difficult question—with evidence
    that even highly-trained DEA scientists disagreed about the answer. His testimony also
    would have been admissible because it was highly relevant and violated no Federal Rules
    of Evidence.
    But we disagree with the district court’s analysis of the “not merely cumulative”
    component, as we conclude that Dr. Berrier’s testimony was qualitatively different from
    the testimony of the other defense witnesses. In stark contrast to Drs. Croatt and Dudley,
    Dr. Berrier was not paid outside his DEA employment to form his opinion about XLR-
    11’s chemical similarity to JWH-018. Nor would Defendants have paid him to testify at
    trial. Consequently, the Government could not have impeached Dr. Berrier in front of the
    jury for having a pecuniary motive for testifying. Dr. Berrier’s inability to be impeached
    on that ground made his testimony unique and particularly relevant, not cumulative. See
    Thomas v. Westbrooks, 
    849 F.3d 659
    , 666 (6th Cir. 2017) (noting “impeachment on the
    basis of pecuniary bias is fundamentally different” from impeachment for other reasons). 9
    9
    We do not comment on the possible subjects of impeachment available to the
    Government in cross-examining Dr. Berrier if he is called to testify at a new trial. That is
    for the trial court to decide in the first instance.
    16
    Also unlike Drs. Croatt and Dudley, Dr. Berrier could have rebutted the testimony
    of Dr. Trecki, the Government’s DEA expert, with his own knowledge of the DEA’s
    processes and analyses. His expert testimony, which diverged from Dr. Trecki’s, could
    have shown the jury that the DEA’s own scientists could not agree on the substantial
    similarity of the chemicals at issue. Drs. Croatt and Dudley could not have provided that
    type of rebuttal testimony.
    And finally, Dr. Berrier’s testimony was material to the chemical structure issue
    because presenting it to the jury could reasonably have resulted in a different trial
    outcome. The jurors struggled to decide whether XLR-11 is substantially similar to JWH-
    018, as indicated by their note to the district court that they were “basically hung on
    Count 1, substantially similar.” J.A. 2048. That note prompted the court to issue an Allen
    charge, after which the jury convicted Defendants. Had Defendants presented testimony
    from someone who opined on that very issue in the course of his duties at the DEA, the
    jury could have entertained reasonable doubt about whether XLR-11 and JWH-018 are
    substantially similar in chemical structure.
    The Government asserts that any error in excluding Dr. Berrier was harmless and
    thus does not warrant reversal. Not so. A constitutional error is harmless only “if it is
    ‘clear beyond a reasonable doubt that a rational jury would have found the defendant
    guilty absent the error.’” United States v. Sayles, 
    296 F.3d 219
    , 223 (4th Cir. 2002)
    (quoting Neder v. United States, 
    527 U.S. 1
    , 18 (1999)). Here, the jury’s difficulty with
    the substantial similarity issue suggests that Dr. Berrier’s testimony was “evidence upon
    which [the] jury could have reached a contrary finding.” See 
    Rhynes, 218 F.3d at 323
    17
    (internal quotation marks omitted). Defendants “genuinely contested” the substantial
    similarity of XLR-11 and JWH-018 at every turn, and Dr. Berrier was uniquely situated
    “to rebut much of the Government’s [scientific] evidence against [them].” See 
    id. (internal quotation
    marks omitted); see also United States v. Yarbrough, 
    527 F.3d 1092
    ,
    1103 (10th Cir. 2008) (holding the defendant’s “substantial rights were affected” when
    “the district court’s error deprived [him] of important evidence relevant to a sharply
    controverted question going to the heart of [his] defense”). Accordingly, we harbor doubt
    about whether the jury would have convicted Defendants if Dr. Berrier had testified, and
    we hold that his exclusion from trial was a Sixth Amendment violation that was “not
    harmless.” See 
    Rhynes, 218 F.3d at 323
    . 10
    Even if Defendants would have made different strategic choices had Dr. Berrier
    been made available to them—for example, calling only one of the other expert
    chemists—the court improperly denied them the opportunity to present favorable,
    material evidence. See 
    Valenzuela-Bernal, 458 U.S. at 867
    . Under either the de novo or
    abuse of discretion standard of review, we hold that the district court wrongly quashed
    10
    Since we hold the district court’s error was not harmless under the harmless
    error standard applicable to constitutional decisions, it also was not harmless under the
    lower harmless error standard applicable to pure evidentiary decisions. See United States
    v. Ferguson, 
    752 F.3d 613
    , 618 (4th Cir. 2014) (contrasting the two harmless error
    thresholds and noting a pure evidentiary error is not harmless if it had a “‘substantial and
    injurious effect or influence in determining the jury’s verdict’” (quoting Kotteakos v.
    United States, 
    328 U.S. 750
    , 776 (1946))).
    18
    the subpoena to Dr. Berrier. We therefore reverse the district court’s materiality ruling,
    vacate Defendants’ convictions and remand for a new trial. 11
    III.
    We now turn to the district court’s exclusion of certain defense evidence. To
    negate the mens rea element of the Government’s case—that Defendants knew XLR-11
    was substantially similar to JWH-018 in chemical structure and physiological effects—
    Defendants proffered evidence to demonstrate that they had innocent intent when
    shipping their spice to Virginia on August 9, 2012. The court excluded this evidence,
    which came from three sources: DEA Special Agent Claude Cosey, attorney David
    McGee, and Defendant Ritchie. Defendants argue the exclusion of this evidence is
    reversible error. But before assessing the district court’s rulings, we will address three
    preliminary matters.
    A.
    1.
    First, these issues are now before us for the second time. We exercise our
    discretion to address Defendants’ claims because we are remanding for a new trial and
    11
    In any further proceedings, the Government has the option to grant the Touhy
    request as to Dr. Berrier, dismiss the indictment, or endure a sanction. See United States
    v. Rivera, 
    412 F.3d 562
    , 570 (4th Cir. 2005) (“If the evidence is material to the defense,
    then the government must provide the evidence or, in most cases, dismiss the
    prosecution.”); 
    Moussaoui, 382 F.3d at 476
    (concluding that excluded witnesses’
    testimony was material and noting “the choice is the Government’s whether to comply
    with [the relevant] orders or suffer a sanction”).
    19
    the issues are “likely to recur on remand.” 
    Drakeford, 675 F.3d at 406
    . The Government
    incorrectly argues that Defendants waived the undecided claims from the first appeal
    because they did not press those claims in the district court on remand. On the contrary,
    Defendants had no opportunity to reassert their claims in the district court before the
    current appeal, given the limited remand and the district court’s materiality ruling. Our
    decision to “not address” every issue in the first appeal, Ritchie II, 734 F. App’x at 879
    n.7, had no bearing on the merits of the unaddressed claims. We created no “law of the
    case” as to them and we will address in turn the claims Defendants have raised again in
    this appeal. See Brittingham v. Jenkins, No. 91-1245, 
    1992 WL 172092
    , at *5 & n.4 (4th
    Cir. July 23, 1992) (unpublished table decision) (per curiam). 12
    2.
    Second, although we generally review evidentiary rulings for abuse of discretion,
    
    McLean, 715 F.3d at 143
    , Defendants ask us to review the district court’s exclusion of the
    proffered testimony of Cosey and McGee de novo because it arises in the context of a
    Sixth Amendment claim. 13 As noted above, we often analyze trial court rulings
    underlying Sixth Amendment claims without announcing a separate standard of review
    for the overarching constitutional challenge. We will do likewise here, reviewing the
    district court’s exclusions of the Cosey and McGee evidence for abuse of discretion and
    12
    As for Defendants’ renewed mens rea jury instruction claim, however, we have
    already established that the district court properly instructed the jury. Ritchie II, 734 F.
    App’x at 879–81. We will not disturb that decision, which is the law of the case.
    13
    Defendants have not framed the exclusion of Ritchie’s testimony as a Sixth
    Amendment violation, so we will review that evidentiary ruling for abuse of discretion.
    20
    harmlessness. See 
    McLean, 715 F.3d at 143
    . Even if we undertook a de novo review as to
    these two witnesses, however, our decisions would not change.
    3.
    Third, we must address Defendants’ argument that they should have been allowed
    to present evidence of their innocent intent outside the confines of a recognized
    affirmative defense. In an effort to circumvent the district court’s rejection of their
    various affirmative defenses, Defendants contend that the evidence in question is
    nonetheless admissible to demonstrate their innocent intent. In contrast to an affirmative
    defense, which “excuses punishment for a crime the elements of which have been
    established and admitted,” United States v. Thompson, 
    554 F.3d 450
    , 452 n.2 (4th Cir.
    2009) (internal quotation marks omitted), an innocent intent defense negates the mens rea
    element of the charged offenses. However, this Court has not previously permitted an
    innocent intent defense and we need not determine whether to do so here in order to
    resolve this appeal.
    We understand that at least two district courts examining similar facts to those
    before us have allowed defendants to present innocent intent evidence, even when that
    evidence was insufficient to support an affirmative defense. See United States v. Way,
    No. 1:14–cr–00101–DAD–BAM–1, 
    2018 WL 3062159
    , at *1–3 (E.D. Cal. June 19,
    2018) (compelling Agent Cosey to testify about his conversations with Ritchie as
    evidence of defendant Way’s innocent intent in facilitating Zencense’s operations);
    United States v. Ritchie, No. 2:15-cr-00285-APG-PAL, 
    2018 WL 6580570
    , at *3–4 (D.
    Nev. Dec. 13, 2018) (allowing defendants Ritchie and Galecki to present evidence of
    21
    Agent Cosey’s conversations with Ritchie to demonstrate their innocent intent). Those
    decisions, of course, are not precedential or binding on us.
    Nor are decisions from our sister circuits binding, and only one of those courts has
    expressly recognized the innocent intent defense. See United States v. Alvarado, 
    808 F.3d 474
    , 486 (11th Cir. 2015) (explaining a defendant may “effectively backdoor the rejected
    [public authority] defense by testifying that he genuinely believed” that the government
    directed and approved of his conduct); United States v. Baptista-Rodriguez, 
    17 F.3d 1354
    , 1368 n.18 (11th Cir. 1994) (collecting cases); see also United States v. Xiong, 
    914 F.3d 1154
    , 1159–60 (8th Cir. 2019) (leaving undisturbed the district court’s admittance
    of innocent intent defense evidence even though it did not support the public authority
    and entrapment by estoppel affirmative defenses). The Eleventh Circuit has also noted
    the uniqueness of its position, observing that it “may be the only circuit to explicitly
    allow an innocent intent defense in this context.” 
    Alvarado, 808 F.3d at 487
    . Moreover,
    the Second Circuit has criticized the Eleventh Circuit’s view as an “‘unwarranted
    extension’” of the established affirmative defenses. United States v. Giffen, 
    473 F.3d 30
    ,
    43 (2d Cir. 2006) (quoting United States v. Wilson, 
    721 F.2d 967
    , 975 (4th Cir. 1983), in
    which we affirmed the district court’s refusal to instruct the jury on the “good faith”
    defense of reliance on official authority because the evidence did not support it). In the
    Second Circuit’s view, allowing defendants to assert an innocent intent defense would
    “‘grant any criminal carte blanche to violate the law should he subjectively decide’” that
    he served some higher, innocent purpose, a lenience which would “swallow the actual
    22
    public authority and entrapment-by-estoppel defenses.” 
    Id. (quoting Wilson
    , 721 F.2d at
    975).
    We thus are not alone in hesitating to recognize the innocent intent defense. But
    setting aside the limited value of those decisions, we need not decide here whether to
    permit an innocent intent defense in this Circuit because we can resolve Defendants’
    arguments apart from that defense.
    B.
    Finally, we come to the merits of Defendants’ evidentiary challenges, bearing in
    mind that we may only assess whether the evidence was properly excluded for the reason
    Defendants proffered it—to negate the mens rea element of the Government’s case. See
    Ramming Real Estate Co. v. United States, 
    122 F.2d 892
    , 893 (8th Cir. 1941) (“Where a
    litigant seeks a reversal upon a ruling of the court rejecting evidence offered for a specific
    purpose, he [cannot] in the appellate tribunal change . . . the ground or theory upon which
    he asked the lower court to admit the testimony.”); accord Shepard v. United States, 
    290 U.S. 96
    , 102–03 (1933). For the reasons below, we hold that the district court did not
    abuse its discretion in excluding Cosey’s testimony and affirm that evidentiary ruling.
    With regard to McGee’s and Ritchie’s testimony, however, we vacate the district court’s
    exclusion of that evidence and remand for further proceedings.
    1.
    a.
    Agent Cosey: On July 25, 2012, law enforcement officers inspected Zencense’s
    production warehouse in Las Vegas, Nevada. Agent Cosey did not participate in that
    23
    “raid,” but heard about it and called Ritchie, who invited him to visit the Zencense
    facility on Burgess Road in Pensacola, Florida. Cosey met Ritchie there the next day.
    Ritchie showed him the facility, described the spice manufacturing and packaging
    process, identified the spice’s chemical additives, and gave Cosey lab reports and spice
    samples. At one point Ritchie said to Cosey that “if [Cosey] told [Ritchie] he was doing
    anything illegal, he would close it down that day.” J.A. 2087. Cosey testified in his
    deposition that he did not know at that time whether the spice contained a controlled
    substance or analogue and he offered no opinion to Ritchie that what he was doing was
    either legal or illegal.
    Cosey and Ritchie met again in Pensacola on September 13. Along with other law
    enforcement officers, Cosey inspected a Zencense facility on Copter Road with Ritchie,
    who also met privately with Cosey and other officers and obliquely discussed the legality
    of his business. Ritchie said to them, “I know if law enforcement wants to put somebody
    out of business that’s not doing anything illegal, there’s means to do it.” J.A. 2101. He
    reiterated that selling Zencense’s spice was “not illegal,” J.A. 2102, but told Cosey “that
    if his products were made illegal, if those additives in his products were made illegal, that
    he would destroy the product right then and there.” J.A. 2109–10. Cosey responded, “If
    what you are producing and distributing is not a controlled substance, I cannot—law
    enforcement cannot and will not engage—or interfere in your, you know, ability to
    conduct commerce.” J.A. 2101.
    The officers then drove to Zencense’s Burgess Road location and Ritchie
    continued his conversation with Cosey and the officers by asking, “Am I going to
    24
    continue to be looked at, targeted by law enforcement?” J.A. 2106. Cosey responded,
    “While what you are doing may be legal now, it could change in the future.” J.A. 2106.
    He further explained, “[J]ust because something is legal today doesn’t mean it might not
    be illegal in the future, because the compounds are constantly—they are adding
    compounds to the banned list all the time.” J.A. 2107.
    Before trial, Defendants sought, through a Touhy request, to compel Cosey to
    testify about these conversations to establish the affirmative defense of entrapment by
    estoppel. See United States v. Clark, 
    986 F.2d 65
    , 69 (4th Cir. 1993) (“The defense of
    entrapment by estoppel is available when a government official tells the defendant that
    certain activity is legal, the defendant commits the activity in reasonable reliance on that
    advice, and prosecution for the conduct would be unfair.”). The district court declined to
    compel Cosey’s testimony, holding that the proffered evidence was insufficient to
    establish the entrapment by estoppel defense because the spice business had been in full
    swing for months when Ritchie first talked to Cosey. The court explained that the
    element of reasonable reliance was missing: “[Y]ou cannot rely on something that
    happened seven months later to try to raise the suggestion that there was some reliance on
    something the government said . . . when the illegal conduct is up and running seven
    months before.” J.A. 356–57.
    In light of this ruling, Defendants changed course and proffered the same
    testimony as general evidence that they lacked the mens rea required to violate the
    Analogue Act. They argued that on August 9, the date of the first charged spice shipment
    to Virginia, they believed distributing spice containing XLR-11 was legal because Cosey
    25
    never told Ritchie on July 26 that doing so was illegal. The district court denied
    Defendants’ alternate proffer as a “backdoor way to circumvent the Court’s ruling” and
    reiterated that Cosey’s testimony was inadmissible because he spoke to Ritchie after the
    spice enterprise was fully operational. J.A. 357.
    b.
    We affirm the district court’s exclusion of Cosey’s testimony because it was
    irrelevant in two ways. First, Cosey never indicated that selling XLR-11 was legal. Each
    time Ritchie asked whether his business was lawful, Cosey responded noncommittally,
    saying things like, “If what you are producing and distributing is not a controlled
    substance, . . . law enforcement cannot and will not . . . interfere in your . . . ability to
    conduct commerce.” J.A. 2101. Even Cosey’s warning on September 13 that “just
    because something is legal today doesn’t mean it might not be illegal in the future,” J.A.
    2107, was not an affirmative statement that selling XLR-11 was currently legal. Nothing
    Cosey said to Defendants could reasonably support a reliance on an official
    representation that their actions were lawful, so Cosey’s testimony could not reveal
    Defendants’ mens rea on that point.
    Second, Cosey’s testimony is not probative of Defendants’ mens rea because his
    conversations with Defendants were unrelated to the similarity of XLR-11 and JWH-018.
    As Cosey’s September 13 conversation with Ritchie occurred after the August 9
    shipment, it is irrelevant to showing Defendant’s intent on August 9. But even the July 26
    conversation, which followed months of Defendants’ regular sales of spice with XLR-11
    but preceded the August 9 shipment, would not have tended to negate Defendants’
    26
    knowledge of substantial similarity on August 9. This is because Cosey simply inspected
    the Zencense facilities and did not discuss the chemical structure or effects of XLR-11 or
    JWH-018 with Defendants on July 26. In fact, Cosey stated in his deposition that he
    could not verify Ritchie’s description of the spice’s contents on July 26 because he had
    not yet seen a DEA lab report on the substance. Therefore, Cosey did not know whether
    the spice contained XLR-11, and none of his comments to Defendants could have
    negated their knowledge of whether their spice additive was substantially similar to
    JWH-018. Cosey’s proffered testimony is thus irrelevant, and the district court did not
    abuse its discretion in excluding it. See Fed. R. Evid. 401(a) (noting that evidence is
    relevant if “it has any tendency to make a fact more or less probable than it would be
    without the evidence”). 14
    14
    To bolster their innocent intent argument, Defendants cite United States v.
    Makkar, 
    810 F.3d 1139
    (10th Cir. 2015), an out-of-circuit case in which the defendants
    were charged with distributing a controlled substance analogue via “incense.” 
    Id. at 1147–48.
    To show they lacked knowledge of the substance’s chemical structure, those
    defendants proffered evidence that “they asked state law enforcement agents to test the
    incense to assure its legality under state law—and that they offered to stop selling the
    incense until the results came in.” 
    Id. at 1147.
    The district court excluded the evidence,
    but the Tenth Circuit reversed, holding the defendant’s proffer was not “merely
    cumulative” and characterizing it this way:
    As a matter of common sense and our collective experience, we have a hard
    time imagining more powerful proof that a defendant didn’t know the
    chemical composition of a drug, and didn’t know it was substantially
    similar to an unlawful substance, than evidence that he turned to law
    enforcement for information about the drug’s composition and offered to
    suspend sales until tests could be performed.
    
    Id. at 1147–48.
    Defendants here argue that because they, too, “turned to law
    enforcement” for advice, see 
    id. at 1148,
    Cosey’s testimony should have been admitted as
    proof of their innocent intent.
    (Continued)
    27
    We therefore affirm the district court’s exclusion of Cosey’s irrelevant testimony.
    As any error in excluding it did not “affect the outcome of [the] case,” see 
    Ferguson, 752 F.3d at 619
    , it was harmless, and we hold the district court did not violate Defendants’
    compulsory process rights by excluding Cosey from testifying.
    2.
    a.
    Attorney McGee: In late July or early August 2012, after federal officials began
    investigating Zencense, Defendants contacted Florida attorney David McGee to represent
    them. After conducting some preliminary research, McGee agreed to represent
    Defendants. They retained him on August 6, three days before the first charged shipment.
    At points during McGee’s representation of Defendants, he consulted chemists about the
    chemical structures of XLR-11 and JWH-018, and several chemists opined to him that
    Not only do Defendants rely on a case we need not follow, but their analogy is
    critically flawed. The Makkar defendants were only retailers of the incense and thus
    disputed their knowledge of the ingredients’ chemical structure and physiological effects.
    That is, they challenged the first of the two Analogue Act requirements the Government
    has to prove when it proceeds under the substantial similarity method of proof.
    
    McFadden, 823 F.3d at 223
    ; see 21 U.S.C. § 802(32)(A). Here, Defendants were spice
    producers and are not challenging that they knew the chemical structure of XLR-11. They
    admit that they reformulated their spice to include XLR-11 based on their customers’
    demands and routinely acquired detailed lab reports identifying the spice’s composition.
    Defendants are instead challenging the second element the Government must prove: that
    Defendants knew (based on its chemical structure and physiological effects) that XLR-11
    and JWH-018 were “substantially similar” within the meaning of 21 U.S.C.
    § 802(32)(A). Because Makkar’s holding addressed the first Analogue Act requirement,
    not the second, it has no bearing on our decision here.
    28
    the chemicals are not substantially similar. McGee kept Defendants apprised of his
    research.
    After Defendants were indicted, McGee represented them in pretrial proceedings
    below. During a hearing on the propriety of McGee’s joint representation of Defendants,
    the district court asked him whether Defendants intended to assert the affirmative defense
    of advice of counsel. McGee responded that they would not use that defense because he
    “never” advised them that selling XLR-11 was legal:
    THE COURT: Well, you know, what are your main defenses in this case? I
    don’t know whether you want to reveal your defense strategy—
    MR. McGEE: I have revealed my defense strategy to the government since
    January of 2013. It has not changed, it will not change. They know what
    our defense is.
    THE COURT: . . . . Is one of the potential defenses that they acted pursuant
    to legal counsel?
    MR. McGEE: Not Mr. Miller or myself. There is a possibility that one of
    the defenses will be another lawyer before us, not us, gave them advice
    with regard to the legality of these substances. It was not Mr. Miller, it was
    not myself . . . .
    . . . . We have never given such advice and would not give such
    advice.
    Supp. J.A. 12–13. The district court ultimately disqualified McGee from jointly
    representing Defendants, and they each retained new counsel.
    Yet when Defendants secured new counsel, one of the affirmative defenses raised
    was reliance on McGee’s legal advice that XLR-11 was not substantially similar to JWH-
    018 because some chemists had reached that conclusion and told McGee. The district
    court prohibited Defendants from asserting that defense because they could not establish
    29
    its three elements: sharing relevant facts with counsel, receiving legal advice based on
    those facts, and reasonably relying on that advice. See United States v. Perry, 
    30 F. Supp. 3d
    514, 541 (E.D. Va. 2014) (listing the defense’s elements). The district court found that
    Defendants did not disclose all relevant facts to McGee because an Analogue Act
    distribution offense requires distribution of a product “for human consumption,” see
    
    McFadden, 823 F.3d at 223
    , but Defendants labeled theirs “[n]ot for human
    consumption,” J.A. 633, and never told McGee consumers were smoking it. Further,
    Defendants “consulted counsel after [they were] already engaged in selling spice . . . with
    UR-144 and XLR-11 for human consumption,” so they did not sell it in reliance on
    McGee’s advice. Memorandum Order at 7, United States v. Ritchie, No. 4:15-cr-18-RAJ-
    LRL (E.D. Va. Oct. 3, 2016), ECF No. 462.
    After the district court barred reliance on the advice of counsel defense,
    Defendants changed course again and offered McGee’s testimony for the same purpose
    they alternatively proposed for Agent Cosey’s. That is, outside of the affirmative defense,
    the same evidence was proffered as general evidence of Defendants’ lack of mens rea in
    selling XLR-11. Defendants now represented McGee’s discussions with the chemists as
    showing they relied on their attorney’s belief that their August 9 spice shipment was legal
    because it did not contain a controlled substance analogue.
    The district court excluded McGee’s testimony as hearsay, explaining that “the
    state-of-mind exception [to hearsay] goes to the declarant and doesn’t go to this
    30
    defendant.” 15 J.A. 350. Moreover, the court ruled, McGee’s testimony, like Cosey’s, was
    irrelevant because Defendants were already selling XLR-11 when McGee consulted the
    chemists. In the court’s view, “if the point is to show their state of mind at the time they
    commenced the criminal conduct, and the criminal conduct commenced before that
    hearsay statement took place in the first place,” “it would be irrelevant.” J.A. 351.
    b.
    We disagree with the district court. As we understand Defendants’ argument, they
    sought to introduce McGee’s testimony to show they had an innocent state of mind when
    shipping XLR-11 on August 9. 16 If McGee timely transmitted to Defendants the
    chemists’ opinions as they claim, his testimony was not irrelevant; rather, it could have
    been probative of Defendants’ mens rea.
    According to Defendants, they shipped XLR-11 on August 9 and throughout the
    alleged conspiracy in part because they relied on the research of chemical experts whose
    opinions McGee relayed. In Defendants’ view, if McGee had consulted chemists who
    determined XLR-11 was substantially similar to JWH-018, told Defendants about those
    opinions before August 9, and Defendants trusted those opinions, “they would not have
    made their sale to [the retailer in Virginia] on August 8, 2012, or at any time thereafter.”
    15
    The district court was referring to Ritchie, who proffered McGee’s testimony,
    but the ruling applied to both Defendants.
    16
    It is unclear to what extent Defendants still seek to press an advice of counsel
    defense, but we believe the district court properly barred reliance on that affirmative
    defense because Defendants could not support it. Consequently, we will examine
    McGee’s testimony not as legal advice, but as general testimony bearing on Defendants’
    state of mind on August 9.
    31
    Opening Br. 43. We agree with Defendants that McGee’s testimony about the chemists’
    opinions could be probative of their knowledge of the substantial similarity of XLR-11
    and JWH-018 on August 9.
    Defendants’ argument fails, of course, if McGee consulted chemical experts or
    reported his findings after the August 9 shipment. If Defendants received information
    from McGee later, his testimony could not provide context for Defendants’ state of mind
    at the time of the alleged crime. But the record is unclear about when McGee consulted
    the chemists and when or what he informed Defendants that he had learned, so we are
    unable to conclude on this record that his exclusion from trial was harmless. It is possible
    that McGee’s testimony, if the jury believed it, could have affected the outcome of the
    case. 
    Ferguson, 752 F.3d at 619
    . If so, the district court abused its discretion in excluding
    him.
    Therefore, we vacate the district court’s exclusion of McGee’s testimony and
    remand for further proceedings consistent with this opinion. Defendants must be allowed
    to develop the evidence on the narrow issue of when McGee consulted chemists about the
    similarity of XLR-11 and JWH-018 for Defendants’ benefit, when McGee informed
    Defendants about the chemists’ research, and what he told them. We note, however, that
    McGee’s testimony, if a factual basis is established, shall be limited to the issue of the
    chemists’ research and no other subject. Further, our holding is consistent with the rules
    of hearsay in that McGee can only relay the chemists’ opinions if they are offered not for
    their truth, but solely for their effect on Defendants’ state of mind. See Fed. R. Evid.
    801(c) (defining hearsay to include only statements “offer[ed] in evidence to prove the
    32
    truth of the matter asserted in the statement”). McGee may testify as to facts only. He
    may testify about his timely conversations with chemists and with Defendants, but he
    may not speculate as to what Defendants may have been thinking at the time of their
    alleged criminal acts.
    3.
    a.
    Ritchie: Finally, if allowed, Ritchie would have testified that he and Galecki
    shipped the spice on August 9 with an innocent state of mind because they consulted with
    attorneys—including McGee—and chemists and “relied on [their advice] in going
    forward and operated under the assumption that [XLR-11 and JWH-018] were not
    substantially similar.” J.A. 352. The district court excluded Ritchie’s testimony as
    hearsay because others’ statements could not reveal Ritchie’s state of mind and the
    testimony did not fit into the state-of-mind hearsay exception. See Fed. R. Evid. 803(3).
    The court saw Defendants’ maneuver as another “backdoor” attempt to inject evidence
    into the trial that did not meet the threshold for one of the unsupported affirmative
    defenses. J.A. 357.
    b.
    To the extent Ritchie’s testimony about Defendants’ state of mind on August 9 is
    based on his conversations with McGee, it similarly requires sufficient evidence
    regarding the content and timing of the consultation. As discussed above, if there is
    insufficient foundation shown on remand to permit McGee’s testimony about the
    chemists he consulted, then Ritchie’s testimony on this issue must also be excluded.
    33
    Ritchie, of course, can still testify as to his own state of mind without reference to
    McGee. We therefore vacate the district court’s exclusion of Ritchie’s testimony on this
    point and remand for the district court to reexamine Ritchie’s testimony in light of any
    further development of McGee’s testimony, as limited above. As in McGee’s testimony,
    any discussion of the chemists’ opinions in Ritchie’s testimony can only be offered for its
    effect on Defendants’ state of mind and not for its truth. See Fed. R. Evid. 801(c).
    IV.
    As a final matter, Defendants have requested we reassign this case on remand to a
    different district judge, but they have alleged no express bias by the sitting judge.
    Reassignment is only warranted in “unusual circumstances,” none of which exist here.
    United States v. North Carolina, 
    180 F.3d 574
    , 582–83 (4th Cir. 1999) (internal quotation
    marks omitted). We have examined the record and found no express bias, nor have we
    seen any indication that the district judge would jeopardize the “fundamental fairness” of
    any continued proceedings in this case. See G.G. ex rel. Grimm v. Gloucester Cty. Sch.
    Bd., 
    822 F.3d 709
    , 726 (4th Cir. 2016), vacated and remanded on other grounds by 
    137 S. Ct. 1239
    (2017) (mem.). Accordingly, we decline to reassign the case on remand. 17
    17
    Our rulings in this case expand Defendants’ options for presenting evidence in a
    new trial. Nonetheless, Defendants are under no requirement to present the items of
    evidence discussed above, nor is the district court required to make any further specific
    evidentiary decisions save for those consistent with this opinion.
    34
    V.
    For the reasons stated above, the district court’s decisions are
    AFFIRMED IN PART, REVERSED IN PART,
    VACATED, AND REMANDED.
    35
    

Document Info

Docket Number: 18-4727; 18-4730

Citation Numbers: 932 F.3d 176

Judges: Agee, Floyd, Duncan

Filed Date: 7/29/2019

Precedential Status: Precedential

Modified Date: 10/19/2024

Authorities (32)

Allen v. United States , 17 S. Ct. 154 ( 1896 )

McFadden v. United States , 135 S. Ct. 2298 ( 2015 )

United States v. Thompson , 554 F.3d 450 ( 2009 )

Shepard v. United States , 54 S. Ct. 22 ( 1933 )

United States Ex Rel. Touhy v. Ragen , 71 S. Ct. 416 ( 1951 )

United States v. Serrano , 406 F.3d 1208 ( 2005 )

United States v. Gary , 74 F.3d 304 ( 1996 )

United States v. Edwin Paul Wilson , 721 F.2d 967 ( 1983 )

United States v. Sakhawat Ullah, Jr., United States of ... , 976 F.2d 509 ( 1992 )

Kotteakos v. United States , 66 S. Ct. 1239 ( 1946 )

Old Chief v. United States , 117 S. Ct. 644 ( 1997 )

United States v. David Tannehill Clark , 986 F.2d 65 ( 1993 )

United States v. Juan Baptista-Rodriguez, Ramon Calvo, and ... , 17 F.3d 1354 ( 1994 )

United States v. Joseph Jesse Espinoza , 641 F.2d 153 ( 1981 )

Neder v. United States , 119 S. Ct. 1827 ( 1999 )

United States Ex Rel. Drakeford v. Tuomey Healthcare System,... , 675 F.3d 394 ( 2012 )

United States v. Soriano-Jarquin , 492 F.3d 495 ( 2007 )

United States v. Michael Sevane Rhynes, United States of ... , 218 F.3d 310 ( 2000 )

United States v. Darren Youngman, Also Known as Tote ... , 481 F.3d 1015 ( 2007 )

United States v. Marvel Johnson Prince-Oyibo , 320 F.3d 494 ( 2003 )

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