United States v. Williams ( 2022 )


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  • Appellate Case: 21-6061     Document: 010110736006        Date Filed: 09/08/2022     Page: 1
    FILED
    United States Court of Appeals
    PUBLISH                                 Tenth Circuit
    UNITED STATES COURT OF APPEALS                         September 8, 2022
    Christopher M. Wolpert
    FOR THE TENTH CIRCUIT                            Clerk of Court
    _________________________________
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.                                                            No. 21-6061
    GREGORY YARNELL WILLIAMS,
    Defendant - Appellant.
    _________________________________
    Appeal from the United States District Court
    for the Western District of Oklahoma
    (D.C. No. 5:20-CR-00149-PRW-1)
    _________________________________
    Laura K. Deskin, Research & Writing Specialist (Susan M. Otto, Federal Public
    Defender, with her on the briefs), Office of the Federal Public Defender, Western District
    of Oklahoma, Oklahoma City, Oklahoma, for Defendant-Appellant
    Jason M. Harley, Assistant United States Attorney (Robert J. Troester, United States
    Attorney with him on the brief), Office of the United States Attorney, Western District of
    Oklahoma, Oklahoma City, Oklahoma, for Plaintiff-Appellee.
    _________________________________
    Before TYMKOVICH, Chief Judge, BALDOCK and ROSSMAN, Circuit Judges.
    _________________________________
    ROSSMAN, Circuit Judge.
    _________________________________
    Gregory Yarnell Williams appeals his sentence after pleading guilty to
    possession with intent to distribute methamphetamine in violation of 
    21 U.S.C. § 841
    and being a felon in possession of a firearm in violation of 
    18 U.S.C. § 922
    (g). He
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    raises two claims of error. First, Mr. Williams contends his sentence is procedurally
    unreasonable because the district court incorrectly calculated his base offense level
    under the advisory Sentencing Guidelines. Mr. Williams claims the district court
    clearly erred in its drug-quantity calculation by holding him accountable for alleged
    packages of methamphetamine on which the government presented no evidence.
    Second, he asserts the district court imposed an illegal sentence by erroneously
    applying the Armed Career Criminal Act (ACCA) enhancement. According to Mr.
    Williams, his prior Oklahoma convictions for distributing a controlled dangerous
    substance were not categorically “serious drug offenses” under 
    18 U.S.C. § 924
    (e)(2)(A)(ii) because his state offenses applied to hemp, and hemp was not a
    federally controlled substance at the time of his federal offense.
    We agree with Mr. Williams on both issues. We vacate the judgment and
    remand for resentencing.
    I.     Background
    A. Factual Background
    In May 2020, the U.S. Postal Inspection Service (USPIS) flagged a Priority
    Mail Express package addressed to 104 SE 39th Street in Oklahoma City. USPIS
    identified the package as suspicious because it was shipped from San Bernardino,
    California, a known source area of controlled substances, and the sender/recipient
    names were not associated with the listed addresses. Investigators from USPIS
    provided surveillance as the package was delivered to the 39th Street address. They
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    observed a man later identified as Mr. Williams pick up the package and leave the
    residence in an SUV about 40 minutes later.
    On June 2, 2020, investigators intercepted another suspicious Priority Mail
    Express package mailed from San Bernardino to the 39th Street address. A drug dog
    indicated the package contained narcotics. After obtaining a search warrant,
    investigators opened the package, found suspected methamphetamine in vacuum-
    sealed bundles, and then repackaged it for delivery.
    On June 3, the package was delivered to the 39th Street address under
    surveillance. Upon delivery, law enforcement officers saw Mr. Williams take the
    package into the house and, shortly thereafter, leave in his SUV. Officers stopped the
    SUV, arrested Mr. Williams, and found him in possession of about $1,800 in cash.
    Pursuant to a warrant, officers searched the 39th Street address and found the
    resealed package, two scales, a heat sealer, a surveillance system, and a loaded
    revolver. They also found an empty package from San Bernardino dated April 22,
    2020.
    Subsequent testing showed the package delivered on June 3 contained
    1,720.54 grams of a substance containing methamphetamine with a purity level of
    71%. Thus, it contained approximately 1,222 grams of actual methamphetamine.
    B. Procedural Background
    A grand jury indicted Mr. Williams on three counts: (1) possession with intent
    to distribute 500 grams or more of a mixture or substance containing
    methamphetamine in violation of 
    21 U.S.C. § 841
    (a)(1), (b)(1)(A); (2) maintaining a
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    drug-involved premises in violation of 
    21 U.S.C. § 856
    (a)(1); and (3) felon in
    possession of a firearm in violation of 
    18 U.S.C. § 922
    (g). Mr. Williams pled guilty
    without a plea agreement to counts one and three.
    1. The Presentence Report and Objections
    According to the presentence investigation report (PSR), investigators
    reviewed United States Postal Service (USPS) records and concluded that, between
    January 6 and June 1, 2020, seven parcels ranging in weight from about one to five
    pounds were delivered to the 39th Street residence from California, in addition to the
    package intercepted on June 3. The 39th Street residence belongs to Mr. Williams’
    brother. Mr. Williams lived with his common-law wife at 1312 NE 19th Street in
    Oklahoma City. Investigators determined similar parcels from California had been
    mailed directly to Mr. Williams’ residence on April 29, May 22, and May 28, 2020—
    specifically three packages weighing three pounds each.
    The PSR determined the applicable guideline for Mr. Williams’ drug count
    was U.S.S.G. § 2D1.1. Under that guideline, the base offense level is driven by the
    type and quantity of drugs involved in the offense, id. § 2D1.1(a)(5), (c), including
    all relevant conduct, id. cmt. n.5 (“Types and quantities of drugs not specified in the
    count of conviction may be considered in determining the offense level.” (citing
    U.S.S.G. § 1B1.3(a)(2) (Relevant Conduct))). To calculate drug quantity, the PSR
    started with the 1,222 grams of actual methamphetamine recovered on June 3 from
    the package intercepted at the 39th Street address. It then added the three packages
    mailed to Mr. Williams’ house at 19th Street. Importantly, as we will explain, the
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    PSR disclaimed reliance on the seven other packages mailed to the 39th Street
    address. The PSR concluded “there was insufficient information to determine that the
    additional [seven] parcels mailed to the [39th Street] residence contained narcotics
    attributable to the defendant.” R. vol. 2 at 12. The 1,222 grams of actual
    methamphetamine equaled 24,440 kilograms of converted drug weight; the other 9
    pounds, or 4.08 kilograms, equaled 8,160 kilograms for a total converted drug weight
    of 32,600 kilograms.1 That total amount of converted drug weight—at least 30,000
    kilograms—set Mr. Williams’ base offense level at 36. See § 2D1.1(c)(2). After
    applying two enhancements, the PSR determined Mr. Williams’ total offense level on
    count one was 40.
    As to count three, the § 922(g) violation, the PSR determined a cross-reference
    to the drug guideline was applicable. Thus, the total offense level from the drug
    count, 40, also applied to count three.
    The PSR reported Mr. Williams’ criminal history, including three prior
    Oklahoma convictions for possession with intent to distribute a controlled dangerous
    substance in 1996, 1997, and 2003. According to the PSR, each of these convictions
    was a “serious drug offense” under § 924(e)(2)(A)(ii) and therefore Mr. Williams was
    subject to an enhanced sentence under the ACCA. The enhancement increased the
    statutory range on his § 922(g) conviction from 0-10 years of imprisonment to 15
    1
    One gram of actual methamphetamine equals 20 kilograms of converted drug
    weight; one gram of a substance containing methamphetamine equals 2 kilograms of
    converted drug weight. § 2D1.1 cmt. n.8(D).
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    years to life imprisonment. Id. § 924(e)(1). However, it did not affect his total
    offense level under the Guidelines.
    Before sentencing, Mr. Williams objected to the PSR’s drug-quantity
    calculation. Mr. Williams specifically contested the PSR’s reliance on the three
    packages sent to his residence on 19th Street. He disputed these packages contained
    methamphetamine, and even if they did, he contended the weights determined by the
    PSR overestimated drug quantity because they failed to account for packaging
    material. Recall, the PSR had disclaimed reliance on the seven packages mailed to
    the 39th Street address. According to Mr. Williams, counting only the package
    actually intercepted on June 3 and not the weight from the three contested packages
    sent to his residence, the base offense level should be 34 (not 36 as calculated in the
    PSR).
    Mr. Williams also objected to the ACCA determination. He asserted his prior
    convictions were not categorically “serious drug offenses” under the ACCA and
    challenged the PSR’s contrary conclusion. According to Mr. Williams, his Oklahoma
    offenses were overbroad because they applied to hemp, which is not a federally
    controlled substance.
    2. Sentencing Hearing
    At the start of the sentencing hearing, the district court sought to clarify
    precisely what packages the government was attributing to Mr. Williams:
    As I understand it from the presentence report, Mr. Williams is being held
    accountable for the package that was actually seized, as well as the three
    packages that were mailed to the house that he shares with his common-law
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    wife. Is that a correct understanding of the facts? But that he is not being
    held responsible for some of the other suspicious packages, I’ll say, that
    were noted and found, which were mailed to the brother’s house where the
    package that was searched and seized was mailed; is that correct?
    R. vol. 3 at 13.
    The government confirmed the district court’s understanding, “That’s correct,
    Your Honor.” Id. The government further explained, “We know now, post-arrest, and
    you will hear evidence on this today—probation doesn’t have this—there were eight
    total packages from San Bernardino.” Id. at 17.
    “And does that eight include the three that are at issue?” the district court
    asked. Id. at 18. “Yes,” the government confirmed. Id.
    As the government now concedes, it did not put on any evidence at the
    sentencing hearing about the three packages delivered to Mr. Williams’ house on
    19th Street that were counted in the PSR and objected to by Mr. Williams—that is,
    “the three that [were] at issue.” Aplee. Br. at 16. Instead, the government only
    introduced evidence about the eight packages delivered to the 39th Street address
    from San Bernadino—including the package initially flagged as suspicious on May
    19 and the package actually intercepted on June 3—plus a ninth package delivered to
    39th Street from Loma Linda, California. A USPIS investigator testified about the
    similarity between the packages delivered to 39th Street on May 19 and June 3. He
    also prepared a chart, based on his review of USPS records, which included seven
    other packages with allegedly similar characteristics:
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    R. vol. 3 at 73; R. vol. 2 at 45.
    The USPIS investigator testified the April 22 package was found empty at the
    39th Street house during the execution of the search warrant. And he explained that
    the weights represented in the approximate-weight column accounted for the whole
    weight of the parcel, including both the packaging material and the contents. None of
    the other six packages described in the chart were recovered.
    Following the government’s presentation of evidence, the district court
    observed, “It seems like the testimony I have heard at least leads to a pretty strong
    inference that we had as many as ten packages that it’s reasonable to infer contained
    methamphetamine. He’s only been held accountable for the one that was actually
    seized, plus three more, if I’m understanding correctly, in the PSR.” R. vol. 3 at 84.
    Ultimately, the district court found the evidence presented supported the PSR’s drug-
    quantity calculation:
    Having heard all the testimony that I have heard today, and given, you
    know, I think the quite strong circumstantial evidence that points to the fact
    that these packages were like the package that was seized such that we can
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    infer that they did, in fact, contain methamphetamine and that the weights
    of the methamphetamine for which Mr. Williams is being held
    accountable—you know, even if we talk about packaging and other
    things . . . that he could have been held responsible for a lot more than he’s
    actually being held responsible for. Such that I think that I can reasonably
    approximate the amount that he should be held accountable for as relevant
    conduct, and I think that the amount contained in those paragraphs in the
    presentence investigation report are, therefore, reasonable and supported by
    the evidence.
    Id. at 90-91.
    The district court overruled Mr. Williams’ objection and decided his base
    offense level was 36.
    As for Mr. Williams’ ACCA objection, the district court expressly declined to
    address it. The district court observed the ACCA designation increased the statutory
    sentencing range on count three—the § 922(g) charge—from a maximum of 10 years
    to a minimum of 15 years. The district court then determined the ACCA designation
    did not affect the guidelines range and sentenced Mr. Williams under the ACCA.
    With a total offense level of 38 and criminal history category VI,
    Mr. Williams’ guidelines range was 360 months to life imprisonment. The district
    court granted a downward variance from the guidelines range and imposed
    concurrent 284-month sentences on each count.
    Mr. Williams timely appealed.
    II.    Discussion
    Mr. Williams appeals his sentence on two grounds. First, he contends the
    district court erred in its drug-quantity calculation by relying on the three packages
    sent to his house when he specifically objected to including those packages and the
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    government presented no evidence about them. Second, Mr. Williams maintains the
    district court imposed an illegal sentence on count three by applying the ACCA.
    According to Mr. Williams, the district court erroneously calculated the statutory
    sentencing range because his state offenses are categorically broader than the
    ACCA’s definition of “serious drug offense”—specifically, the definition of
    “marijuana” under Oklahoma law that applied to his prior convictions includes hemp
    and therefore is broader than the federal definition.
    The government argues the district court did not clearly err by finding Mr.
    Williams was responsible for more than 30,000 kilograms of controverted drug
    weight. The government acknowledges it did not present evidence about the three
    contested packages on which the PSR relied. But the government maintains the
    evidence it did present—i.e., the eight packages sent to the 39th Street residence from
    San Bernardino—would support a finding of at least 30,000 kilograms of converted
    drug weight.2
    The government further contends the district court correctly sentenced Mr.
    Williams under the ACCA. The government does not dispute Mr. Williams’ prior
    Oklahoma convictions are overbroad when compared to the current federal definition
    of marijuana. However, the government insists the appropriate point of comparison is
    the federal definition of marijuana that existed at the time of Mr. Williams’ prior
    2
    The chart the government presented at sentencing included a ninth package
    sent to the 39th Street address from Loma Linda, California, but the government does
    not rely on this package on appeal.
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    state offenses. Mr. Williams’ prior crimes are “serious drug offenses” for ACCA
    purposes, the government maintains, because Oklahoma’s definition of marijuana
    was not overbroad when he committed his state offenses. The government also
    invites this court to find any ACCA error harmless based on the “concurrent sentence
    doctrine.”
    We agree with Mr. Williams that resentencing is required. The district court
    should not have relied, over Mr. Williams’ objection, on the three contested packages
    sent to his residence on which the government presented no evidence. The
    government does not appear to argue otherwise—as we explain, its argument for
    affirmance goes not to whether the district court erred but to whether any error was
    harmless. Because the government has failed to show harmlessness, however, we
    remand for the district court to reconsider its drug-quantity findings.
    As to the ACCA issue, the district court erred in enhancing Mr. Williams’
    sentence based on his three prior Oklahoma convictions for possession of a
    controlled dangerous substance. We agree with Mr. Williams that, as he argued in
    district court and maintains on appeal, his prior state offenses are categorically
    broader than the definition of “serious drug offense” because they apply to hemp,
    which was not federally controlled at the time of Mr. Williams’ underlying offense
    under § 922(g). In so concluding, we reject the government’s assertion that we must
    compare Mr. Williams’ prior state drug offenses to the federal drug schedules as they
    existed at the time of the prior offenses. Consistent with the overwhelming majority
    of circuit courts to have considered the issue, we hold: to determine whether a prior
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    drug offense is categorically overbroad because it is not limited to federally
    controlled substances, the court must look to the current federal definition of
    “controlled substance”—i.e., the definition in effect at the time of the instant federal
    offense, not at the time of the prior state offense.3
    A. The drug-quantity issue requires remand.
    “We review the court’s ‘determination of the quantity of drugs for which the
    defendant is held accountable under the Guidelines for clear error.’” United States v.
    Aragon, 
    922 F.3d 1102
    , 1110 (10th Cir. 2019) (citation omitted). “Drug quantities
    employed by the district court to calculate the applicable Guidelines range may be
    said to be clearly erroneous only when ‘the district court’s finding was without
    factual support in the record or we are left with the definite and firm conviction that a
    mistake has been made.’” 
    Id. at 1110-11
     (citation omitted). “When the actual drugs
    underlying a drug quantity determination are not seized, the trial court may rely upon
    an estimate to establish the defendant’s guideline offense level ‘so long as the
    information relied upon has some basis of support in the facts of the particular case
    and bears sufficient indicia of reliability.’” United States v. Dalton, 
    409 F.3d 1247
    ,
    3
    The federal definition of marijuana excluded hemp when Mr. Williams
    illegally possessed a firearm and at the time he was sentenced in this case. Thus, this
    appeal does not present the question, or require us to decide, whether the district
    court looks to the federal definition at the time of the commission of the instant
    federal offense or at the time of sentencing thereon. Compare United States v. Hope,
    
    28 F.4th 487
    , 504-05 (4th Cir. 2022) (applying definition at time of sentencing), with
    United States v. Jackson, 
    36 F.4th 1294
    , 1297 (11th Cir. 2022) (applying definition at
    time of commission of offense). We leave that issue open for future resolution in the
    appropriate case.
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    1251 (10th Cir. 2005) (citation omitted). “Although estimates are not forbidden, ‘the
    need to estimate drug quantities at times is not a license to calculate drug quantities
    by guesswork.’” Aragon, 922 F.3d at 1111 (citation omitted). “Moreover, ‘when
    choosing between a number of plausible estimates of drug quantity, none of which is
    more likely than not the correct quantity, a court must err on the side of caution.’” Id.
    (citation omitted).
    1. The drug-quantity calculation was based on three contested
    packages sent to Mr. Williams’ residence on which the
    government presented no evidence.
    Mr. Williams contends the district court clearly erred in relying on the three
    packages sent to his residence on 19th Street to calculate drug quantity under
    U.S.S.G. § 2D1.1(c). As Mr. Williams points out, he specifically objected to the
    PSR’s reliance on these packages, the district court understood them to be “at issue”
    at the sentencing hearing, yet the government “elicited no evidentiary support that
    these three contested parcels even existed.” Opening Br. at 18 (emphasis omitted).
    The government concedes that relying on these three contested packages in the
    drug-quantity finding would be error. Oral Arg. at 18:05 (“It would have been error
    for them to rely on the three.”). But the government insists it is not clear whether the
    district court actually relied on those packages here. According to the government,
    when it is unclear how a district court arrived at its drug-quantity calculation, this
    court will not find clear error if there is “more than enough evidence” in the record to
    support the district court’s ultimate drug-quantity finding. Aplee. Br. at 17 n.8
    (quoting United States v. Rollen, 239 F. App’x 451, 455 & n.3 (10th Cir. 2007)). The
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    government maintains the evidence it did present at the sentencing hearing—i.e.,
    evidence related only to the eight packages sent to the 39th Street residence from San
    Bernardino—was sufficient to support the district court’s ultimate finding, and
    therefore the district court did not clearly err. As we explain, the drug-quantity
    finding requires reversal. The government’s contrary arguments are unpersuasive.
    The government offers only our unpublished decision in Rollen to support its
    “more than enough” evidence standard, but that case is readily distinguishable. In
    Rollen, like in this case, “it [was] unclear from the record how the district court
    arrived at its calculation.” Rollen, 239 F. App’x at 455 n.3. But, unlike in this case,
    “the evidence the court relied upon in calculating the drug quantity attributable to
    [the defendant] bore sufficient indicia of reliability.” Id. at 456. Here, even the
    government’s interpretation of the record confirms the district court, at minimum,
    potentially relied on contested allegations in the PSR for which there was no
    evidence—this would constitute clear error. Under the circumstances, we find Rollen
    does not support affirmance.
    The record demonstrates the district court’s drug-quantity finding relied at
    least in part on the three packages about which the government presented no
    evidence. Recall what happened at the sentencing hearing.
    At the outset, the district court asked the government about the evidentiary
    basis for the drug-quantity calculation. The court wanted to know if it correctly
    understood that (1) only the three packages delivered to Mr. Williams’ house at 19th
    Street were at issue and (2) Mr. Williams was not being held responsible for the other
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    packages sent to his brother’s house at 39th Street that the PSR disclaimed. The
    government stated it would present evidence of eight packages, and in doing so,
    assured the district court the “three that [were] at issue” sent to the 19th Street
    residence were included among them. As it turned out, the government only
    presented evidence of packages delivered to the 39th Street residence. Those are the
    packages, expressly disclaimed in the PSR, for which the district court understood
    Mr. Williams was not being held responsible. The evidence the government said it
    would offer at the sentencing hearing was not what it actually presented. Despite the
    discrepancy, the government did not clarify that, in fact, no evidence had been
    presented about the three contested packages sent to Mr. Williams’ residence.4
    There can be no serious question the district court reasonably believed the
    government had actually presented evidence supporting the “three [packages] that
    [were] at issue.” For example, after the government’s presentation, the district court
    remarked there was evidence of “as many as ten packages,” but found Mr. Williams
    was only being “held accountable for the one that was actually seized, plus three
    more.” R. vol. 3 at 84 (emphasis added). In its ultimate drug-quantity findings, the
    district court found “these packages were like the package that was seized such that
    we can infer that they did, in fact, contain methamphetamine.” Id. at 90 (emphasis
    added). In context, “these packages” referred to the three contested packages
    4
    The USPIS inspector did mention that only the packages represented in the
    chart were “destined for 104 Southeast 39th Street.” R. vol. 3 at 73. However, this
    passing reference to the address was not enough to clarify that the government’s
    evidence did not relate to the “three [packages] that [were] at issue.” Id. at 18.
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    delivered to 19th Street relied on in the PSR—indeed, that is the government’s
    interpretation as well. Aplee. Br. at 17 n.8. (“[T]hese packages [referring to the three
    packages counted in the presentence report] were like the package that was seized
    such that we can infer that they did, in fact, contain methamphetamine.” (alteration in
    original) (quoting district court)). To be sure, the exact basis for the district court’s
    calculation is not perfectly clear. But the record leaves little doubt the district court
    understood the evidence on drug quantity conformed to what the government had
    promised and thus the district court actually relied, at least in part, on the three
    contested packages for which there was no evidence presented. Under these
    circumstances, as the government agrees, reliance on the three packages constitutes
    clear error.
    2. The government has not met its burden of proving harmlessness.
    According to the government, the district court did not clearly err because
    other evidence in the record supported the district court’s total drug-quantity
    finding—at least 30,000 kilograms of converted drug weight. We are not persuaded.
    As we explain, the government’s contention goes to the question of harmlessness, not
    error.
    The government made a similar argument in United States v. Harrison, 
    743 F.3d 760
     (10th Cir. 2014). There, we held the district court clearly erred in
    summarily overruling a defendant’s objection where it mistakenly believed the PSR’s
    drug-quantity calculation was appropriately based on trial evidence. 
    Id. at 764
    . The
    government argued “the district court did not clearly err because trial evidence
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    supports the court’s determination that Defendant was responsible for more than 1.5
    kilograms of methamphetamine, even though the PSR calculation was not based on
    that evidence.” 
    Id.
     Rejecting the government’s position, we explained, “The
    government’s argument is flawed because the court did not purport to rely on
    evidence at trial that was not mentioned in the PSR. The district court clearly
    committed error; the only remaining question is whether the error was harmless.” 
    Id.
    The same is true here.
    The district court erred in relying on drug quantities for which there was no
    evidence presented. That is the end of the error inquiry. Whether other evidence in
    the record nevertheless supports the district court’s drug-quantity finding, as the
    government claims, goes to whether the error was harmless. And on that matter, the
    government has not met its burden.
    “As the beneficiary of the error, the government bears the burden of proving
    harmlessness by a preponderance of the evidence.” United States v. Burris, 
    29 F.4th 1232
    , 1238 (10th Cir. 2022). “[A]n error is not harmless if it requires us to ‘speculate
    on whether the court would have reached [the same] determination’ absent the error.”
    Harrison, 743 F.3d at 764 (second alteration in original) (citation omitted).
    “Accordingly, if the district court failed to make a necessary fact finding, we
    ordinarily reverse and remand for the court to do so.” Id.
    In support of its harmlessness contention, the government proposes a
    drug-quantity calculation using the packages on which it presented evidence at the
    sentencing hearing. The government’s calculation estimates the quantity of drugs in
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    each package by extrapolating the weight-to-packaging ratio from the intercepted
    package. According to the government, the intercepted package was approximately
    76% methamphetamine and 24% packaging by weight. Applying that ratio to the
    packages sent from San Bernardino to the 39th Street residence, the government
    calculates a total drug weight of approximately 5.5 kilograms of methamphetamine,
    which it maintains is enough to cross the threshold of 30,000 kilograms of converted
    drug weight when combined with the actual methamphetamine intercepted.
    Here, the district court made no specific drug-quantity findings based on the
    evidence the government actually presented. While the government’s approach to
    calculating drug quantity does not strike us as unreasonable, it requires initial
    fact-finding and invites speculation. Adopting the government’s calculation on
    appeal would require us to guess about which methodology the district court would
    have used to calculate drug quantity, how reliable it would have found the evidence,
    and how conservative it might have been in its estimation. As in Harrison, “we
    cannot say . . . how much the court would feel justified in extrapolating from the
    evidence.” Id. at 765. And we are “particularly hesitant because the PSR did not see
    fit to refer to [this evidence].” Id. Under these circumstances, we reject the
    government’s invitation to find harmless error by adopting in the first instance its
    proposed approach to calculating drug quantity. See United States v. Roberts, 
    14 F.3d 502
    , 523 (10th Cir. 1993) (“[I]t is not this court’s role to make the factual findings
    necessary to support a sentencing calculation; that is the task of the district court.”
    (citation omitted)).
    18
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    We thus follow our ordinary course and reverse and remand so the district
    court may consider the government’s approach and make further drug-quantity
    findings. Harrison, 743 F.3d at 764 (“We [reverse and remand] because we are not
    sufficiently confident that the district court, had it considered the matter, would have
    found at least 1.5 kilograms of methamphetamine based on the trial testimony.”).5
    B. Mr. Williams’ prior convictions are not categorically “serious drug
    offenses” under the ACCA.
    Mr. Williams has consistently maintained the ACCA does not apply to him.
    The district court sentenced Mr. Williams under the ACCA—without reaching the
    merits of Mr. Williams’ objection6—based on his three prior Oklahoma convictions
    5
    Neither party addressed whether resentencing should be limited to the
    existing record. We need not decide the issue and leave it to the district court’s
    discretion on remand. We note that under similar circumstances we have expressly
    limited resentencing to the existing record. See United States v. Thomas, 
    749 F.3d 1302
    , 1315-16 (10th Cir. 2014) (limiting resentencing to the existing record where
    (1) government bore burden of proof, (2) defendant alerted government to deficiency
    in its proof, and (3) government failed to cure deficiency). But see Aragon, 922 F.3d
    at 1113.
    6
    We note the parties have not asked us to remand to allow the district court to
    address the merits in the first instance. Indeed, Mr. Williams preserved the issue by
    raising it below, the parties fully briefed it on appeal, and its resolution involves a
    pure question of law. Manzanares v. Higdon, 
    575 F.3d 1135
    , 1146 n.10 (10th Cir.
    2009) (“Although the district court did not reach this issue, it is a purely legal
    determination that was argued below and that we may decide on the record.
    Moreover, the parties briefed this issue, providing us the benefit of the adversarial
    process.” (citations omitted)). We may proceed so long as the record is “adequately
    developed.” United States v. Shrum, 
    908 F.3d 1219
    , 1234 & n.10 (10th Cir. 2018)
    (“[W]e decline to remand this case so that the district court may undertake the proper
    analysis in the first instance.”). Under these circumstances, and in the interest of
    judicial economy, we will proceed to the merits of the ACCA issue. Sac & Fox
    Nation of Missouri v. Norton, 
    240 F.3d 1250
    , 1264 (10th Cir. 2001) (“Because the
    facts relevant to that issue are uncontroverted and the issue thus hinges on a question
    19
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    for possessing with intent to distribute a controlled dangerous substance in violation
    of 
    Okla. Stat. tit. 63, § 2-401
    (A)(1). On appeal, Mr. Williams maintains his prior
    convictions are not categorically “serious drug offenses” and the district court
    imposed an illegal sentence by enhancing his sentence under the ACCA. Whether a
    prior conviction qualifies as an ACCA predicate is a legal question we review de
    novo. United States v. Titties, 
    852 F.3d 1257
    , 1263 (10th Cir. 2017).
    The definition of “serious drug offense” expressly incorporates the federal
    definition of controlled substances. 
    18 U.S.C. § 924
    (e)(2)(A)(ii).7 Under the
    categorical approach, a state drug offense that includes non-federally controlled
    substances is overbroad and thus not categorically a “serious drug offense.” United
    States v. Cantu, 
    964 F.3d 924
    , 934 (10th Cir. 2020). In Cantu, we held that section
    2-401(A)(1)—Mr. Williams’ prior statute of conviction—is not categorically a
    “serious drug offense” under the ACCA because it applies to at least three
    non-federally controlled substances. 
    Id.
     However, in a later unpublished opinion, we
    recognized those three substances that rendered the statute overbroad were not added
    until November 1, 2008; thus, Oklahoma convictions under section 2-401(A)(1)
    of statutory interpretation, we have discretion to decide it in the first instance and
    conclude that doing so is in the interests of judicial economy.”); see also Attocknie v.
    Smith, 
    798 F.3d 1252
    , 1259 (10th Cir. 2015) (“If the district court failed to address an
    issue, we can still reverse on that ground if the issue was preserved and is
    meritorious.”).
    7
    The term “serious drug offense” includes “an offense under State law,
    involving manufacturing, distributing, or possessing with intent to manufacture or
    distribute, a controlled substance (as defined in section 102 of the Controlled
    Substances Act (21 U.S.C. 802)).” 
    18 U.S.C. § 924
    (e)(2)(A)(ii).
    20
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    before November 1, 2008, are not overbroad and qualify as ACCA predicates. United
    States v. Traywicks, 827 F. App’x 889, 891 (10th Cir. 2020). Here, Mr. Williams’
    three Oklahoma convictions are from 1996, 1997, and 2003. Under Traywicks, these
    pre-2008 offenses would seem to qualify as ACCA predicates.
    Nevertheless, Mr. Williams contends section 2-401(A)(1) is categorically
    overbroad—criminalizing more substances than does the federal drug schedule—
    because the definition of marijuana that applied in Oklahoma from 1996-2003
    criminalized hemp, while the current federal definition of marijuana expressly
    excludes it. Compare 
    Okla. Stat. tit. 63, § 2-101
    (2) (1996), 
    id.
     (1997), 
    id.
     (2003),
    with 
    21 U.S.C. § 802
    (16)(B) (“The term ‘marihuana’ does not include . . .
    hemp . . . .”). Mr. Williams thus argues, under Cantu, his prior Oklahoma convictions
    are not categorically “serious drug offenses.”
    The government does not dispute Mr. Williams’ prior offenses are
    categorically broader than the current federal definition but insists Mr. Williams is
    looking at the wrong federal drug schedules. According to the government, we should
    compare Mr. Williams’ prior Oklahoma convictions to the federal drug schedules in
    effect at the time of those state convictions—not the schedules in effect at the time of
    his underlying federal offense. The government also urges us to invoke the
    “concurrent sentence doctrine” and hold any error in sentencing Mr. Williams under
    ACCA was harmless because, whether or not Mr. Williams is ACCA eligible, his
    284-month concurrent sentence on the methamphetamine distribution count remains
    unaffected.
    21
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    For starters, the district court mistakenly assumed there was no need to resolve
    the merits of Mr. Williams’ objection to the ACCA enhancement because it did not
    “affect the guideline range calculation.” R. vol. 3 at 23. Nothing in the Guidelines
    relieves the district court of its duty to correctly determine the statutory sentencing
    range. Indeed, the Guidelines expressly provides, regardless of the otherwise
    applicable guideline range, the sentence on each count must fall within the statutory
    sentencing range. See generally U.S.S.G. §§ 5G1.1-.2.
    On the merits, we need only decide one underlying legal issue to determine
    whether the district court erroneously sentenced Mr. Williams under the ACCA. As
    the appellate briefing confirms, the application of the ACCA enhancement turns on
    whether the Oklahoma offense is overbroad, and on that point, the parties disagree
    only on which version of the federal definition of marijuana to consult—the one in
    effect at the time of the instant federal offense, or the version that existed at the time
    of the prior Oklahoma convictions.
    This is a question of first impression in our circuit, though Cantu anticipated
    our need to answer it. Cantu, 964 F.3d at 936-37 (Hartz, J., concurring). Six of our
    sister circuits have recently considered this same timing issue and all but one have
    resolved it in support of Mr. Williams’ position. See United States v. Bautista, 
    989 F.3d 698
    , 703 (9th Cir. 2021); United States v. Abdulaziz, 
    998 F.3d 519
    , 531 (1st Cir.
    2021); United States v. Hope, 
    28 F.4th 487
    , 504-05 (4th Cir. 2022); United States v.
    Jackson, 
    36 F.4th 1294
    , 1297 (11th Cir. 2022); United States v. Perez, No. 21-2130,
    
    2022 WL 3453566
    , at *3 (8th Cir. Aug. 18, 2022). But see United States v. Clark,
    22
    Appellate Case: 21-6061    Document: 010110736006        Date Filed: 09/08/2022    Page: 23
    No. 21-6038, 
    2022 WL 3500188
    , at *1 (6th Cir. Aug. 18, 2022). Consistent with the
    First, Fourth, Eighth, Ninth, and Eleventh Circuits, we hold a defendant’s prior state
    conviction is not categorically a “serious drug offense” under the ACCA if the prior
    offense included substances not federally controlled at the time of the instant federal
    offense. We thus reject the government’s time-of-prior-state-conviction rule and
    adopt a time-of-instant-federal-offense comparison.8
    1. The overwhelming majority of circuits to have considered the
    issue agree the correct point of comparison is the time of the
    instant federal offense—not the prior state offense.
    a. Cantu concurrence
    In Cantu, we held the defendants’ prior conviction under section 2-401(A)(1)
    was not a “serious drug offense” because it included at least three non-federally
    controlled substances. 964 F.3d at 934. There was “no dispute” in Cantu that “at all
    relevant times Oklahoma law included three substances as controlled dangerous
    substances which were not controlled substances under federal law.” Id. at 937
    (Hartz, J., concurring). In his concurrence, Judge Hartz observed “this court may
    8
    In Hope, 28 F.4th at 504-05, the Fourth Circuit held the appropriate
    comparison is to the federal schedule in effect at the time of sentencing on the instant
    federal offense, while in Jackson, 36 F.4th at 1297, the Eleventh Circuit looked to the
    federal schedule at the time of the commission of the instant federal offense. See also
    United States v. Brown, No. 21-1510, 
    2022 WL 3711868
    , at *5 (3d Cir. Aug. 29,
    2022) (agreeing with the Eleventh Circuit that “courts must look to the federal law in
    effect when the defendant committed the federal offense”). Here, the federal
    schedules excluded hemp at both times—Mr. Williams’ commission of the instant
    firearm offense and his sentencing thereon. Thus, we need not decide in this case
    which definition would apply if, for example, a prior offense was overbroad at the
    time of the commission of the offense, but not at sentencing.
    23
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    need to resolve [the timing issue] in future cases that concern whether a prior
    conviction is a conviction for a violent felony or serious drug offense under the
    ACCA.” 
    Id. at 936
    . He opined, “As I understand the ACCA and Supreme Court
    authority, the comparison that must be made is between what the defendant could
    have been convicted of at the time of the commission of the predicate state offense
    and what constitutes a federal drug offense at the time of the federal offense.” 
    Id.
    Using the federal drug schedule in effect at the time of the federal offense, he
    explained, would put “the defendant . . . on notice when he committed his federal
    crime that he had a serious drug offense on his record, and I would think that the
    state offense would be a proper predicate serious drug offense under the ACCA.” 
    Id. at 936-37
    .
    b. Bautista9
    The Ninth Circuit was first to address the issue in a majority opinion, albeit in
    the context of the Guidelines, not the ACCA. Bautista, 989 F.3d at 703. In Bautista,
    as here, the defendant argued that his prior state conviction was overbroad because it
    applied to hemp and the existing federal definition of “controlled substance” did not.
    Id. at 701. The Ninth Circuit held it “must compare [the defendant’s] prior state-law
    conviction with federal law at the time of his federal sentencing.” Id. at 704. It
    9
    The government’s primary argument on appeal is Bautista was
    distinguishable because it arose in the context of the Guidelines—a different rule, the
    government insisted, should apply to the ACCA. But as we discuss, since the briefing
    and oral argument in this case, three circuit courts have adopted Bautista’s timing
    rule in the ACCA context.
    24
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    rejected the government’s proposed rule that the prior state “crime must be compared
    to federal law at the time of the prior state conviction.” Id. at 703. As the Ninth
    Circuit framed it, “The question before us is whether the sentencing court should
    determine the relevance of [a defendant’s] prior state conviction under the federal
    sentencing law that exists at the time of sentencing or under federal sentencing law
    that no longer exists.” Id. The court found no support for the government’s position
    that it “must ignore current federal law and turn to a superseded version of the United
    States Code. Indeed, it would be illogical to conclude that federal sentencing law
    attaches ‘culpability and dangerousness’ to an act that, at the time of sentencing,
    Congress has concluded is not culpable and dangerous.” Id. “Such a view,” it
    explained, “would prevent amendments to federal criminal law from affecting federal
    sentencing and would hamper Congress’ ability to revise federal criminal law.” Id.
    c. Abdulaziz
    Shortly after Bautista, the First Circuit joined the Ninth in holding a
    defendant’s prior conviction, which proscribed hemp, was not a “controlled substance
    offense” under the Guidelines because hemp was not a federally controlled substance
    at the time of the federal sentencing. Abdulaziz, 998 F.3d at 531.10 The First Circuit
    deemed the inquiry “fairly straightforward”:
    10
    We note both Bautista and Abdulaziz understood the term “controlled
    substance” as used in the Guidelines to mean a substance listed in CSA. See Bautista,
    989 F.3d at 702 (citing United States v. Leal-Vega, 
    680 F.3d 1160
    , 1167 (9th Cir.
    2012)); Abdulaziz, 998 F.3d at 529; but see United States v. Jones, 
    15 F.4th 1288
    ,
    1294 (10th Cir. 2021) (holding § 4B1.2(b) does not limit the meaning of a
    25
    Appellate Case: 21-6061      Document: 010110736006        Date Filed: 09/08/2022        Page: 26
    [I]nsofar as the CSA’s drug schedules were incorporated into the guideline
    itself at the time of [the defendant’s] § 922(g) sentencing, it would appear
    that the answer to our question is fairly straightforward: we must look to
    the version of those drug schedules that were “in effect” at that time to
    determine what constituted a “controlled substance” at that time.
    Id. at 523 (citations omitted).
    d. Hope
    In Hope, as here, the defendant argued his prior state drug conviction was not
    a “serious drug offense” because the state law definition of “marijuana” was broader
    than the recently amended federal definition. 28 F.4th at 499. Relying on Bautista,
    the Fourth Circuit held it must “compare the definition of ‘marijuana’ under federal
    law at the time of [the defendant’s] sentencing . . . with [the state’s] definition of
    ‘marijuana’ at the time he was sentenced for his [prior] state offenses.” Id. at 504.
    e. Jackson
    In Jackson, the Eleventh Circuit considered whether the defendant’s prior state
    drug conviction was broader than the ACCA’s definition of “serious drug offense”
    because the federal government recently removed from the federal schedule a
    substance included in the defendant’s prior state offense. 36 F.4th at 1297. As the
    Eleventh Circuit framed the issue,
    This appeal requires us to decide which version of the Controlled Substance
    Act Schedules incorporated into ACCA’s definition of “serious drug
    offense” applies when a defendant is convicted of being a felon in
    possession of a firearm: the version in effect at the time of the defendant’s
    “controlled substance” to substances listed in the CSA), petition for cert. filed, (U.S.
    Aug. 11, 2022) (No. 22-5342).
    26
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    federal firearm-possession violation (for which he is being sentenced), or
    the ones in effect when he was convicted of his predicate state crimes that
    we are evaluating to see whether they satisfy ACCA’s definition of “serious
    drug offense.”
    Id. It held “due-process fair-notice considerations require [courts] to apply the
    version of the Controlled Substance Act Schedules in place when the defendant
    committed the federal firearm-possession offense for which he is being sentenced.”
    Id. “That way, [a defendant] ha[s] notice at the time of his firearm-possession offense
    not only that his conduct violated federal law, but also of his potential minimum and
    maximum penalty for his violation and whether his prior felony convictions could
    affect those penalties.” Id. at 1300.
    f. Perez
    Most recently, in Perez, the Eighth Circuit likewise “conclude[d] that the
    relevant federal definition for ACCA purposes is the definition in effect at the time of
    the federal offense.” 
    2022 WL 3453566
    , at *3. The Eighth Circuit noted its
    “agreement with all other circuit courts of appeals to have addressed the question.”
    
    Id.
     at 5 n.1. It explained, “Whether a previous state conviction is a serious drug
    offense only becomes salient at the time of sentencing for a federal conviction under
    
    18 U.S.C. § 922
    (g). Therefore, the federal law in effect at the time of the federal
    sentencing is the relevant definition for ACCA purposes.” 
    Id. at *3
    . The Eighth
    Circuit found the “government’s insistence that we deviate from the usual rule of
    applying the federal law in force at the time of a federal offense [wa]s unavailing.”
    
    Id. at *4
    .
    27
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    g. Clark
    In Clark, decided on the same day as Perez, the Sixth Circuit became the only
    court to adopt the government’s proposed time-of-conviction approach for sentencing
    enhancements. Clark, 
    2022 WL 3500188
    , at *1. Clark considered the timing issue in
    the context of the Guidelines’ career offender enhancement, concluding a “time-of-
    conviction approach flows from the Guidelines’ text.” 
    Id. at *3
    . Specifically, the
    Clark court focused on the text of the Guidelines requiring the instant offense to be
    “subsequent” to “prior” convictions and decided this language “indicates that the
    court should take a backward-looking approach and assess the nature of the predicate
    offenses at the time the convictions for those offenses occurred.” 
    Id.
     The Sixth
    Circuit also relied on McNeill v. United States, 
    563 U.S. 816
     (2016), which every
    other circuit had expressly distinguished.
    As we will explain, the correct point of comparison is the time of the instant
    federal offense—not the prior state offense—as the First, Fourth, Eighth, Ninth, and
    Eleventh Circuits have likewise soundly determined. We find the government’s
    contrary arguments unconvincing.
    2. Analysis
    The issue here concerns whether a prior conviction qualifies as an ACCA
    predicate. We start with the text of the statute. McNeill, 563 U.S. at 819. Under the
    ACCA, a defendant convicted of being a felon in possession of a firearm is subject to
    a mandatory minimum of 15 years of imprisonment if he “has three previous
    convictions . . . for a violent felony or a serious drug offense.” 
    18 U.S.C. § 924
    (e)(1).
    28
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    As relevant here, a “serious drug offense” is “an offense under State law, involving
    manufacturing, distributing, or possessing with intent to manufacture or distribute, a
    controlled substance (as defined in section 102 of the Controlled Substances Act (21
    U.S.C. 802)).” 
    Id.
     § 924(e)(2)(A)(ii).
    Mr. Williams contends this federal sentencing statute—including the expressly
    incorporated federal definition of “controlled substance”—should be applied as it
    exists at the time of the instant federal offense. The government urges us to interpret
    the ACCA by applying the definition of “controlled substance” as it existed at the
    time of the prior state conviction. The plain language supports Mr. Williams. The
    statute expressly cross-references the definition of controlled substance “in section
    102 of the Controlled Substances Act (21 U.S.C. 802).” Id. Nothing in the language
    of the statute indicates Congress intended “controlled substance” to incorporate
    historical versions of the federal drug schedules—and the government does not
    contend otherwise. Absent any such textual indication, we apply the federal
    definition in its current form.11
    11
    Notably, the government urges a very narrow application of its time-of-
    prior-conviction rule, limited just to the definition of “controlled substance” at issue
    here. That is, the government does not suggest that courts should always compare a
    prior offense to the ACCA definitions of “violent felony” and “serious drug offense”
    that existed at the time of the prior offense—and for good reason. As the Ninth
    Circuit sensibly recognized, it would be “illogical” to “ignore current federal law and
    turn to a superseded version of the United States Code.” Bautista, 989 F.3d at 703.
    Such a rule “would prevent amendments to federal criminal law from affecting
    federal sentencing and would hamper Congress’ ability to revise federal criminal
    law.” Id. Indeed, we have previously applied the ACCA based on prior convictions
    that occurred before the ACCA was enacted, holding that doing so did not violate the
    Ex Post Facto Clause. United States v. Springfield, 
    337 F.3d 1175
    , 1178-79 (10th Cir.
    29
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    As Judge Hartz observed in his concurrence in Cantu and the Eleventh Circuit
    recently emphasized in Jackson, applying the federal definition in effect at the time
    of the federal offense is most consistent with fundamental principles of due process.
    Cantu, 964 F.3d at 936-37 (“[T]he defendant [would be] on notice when he
    committed his federal crime that he had a serious drug offense on his record.”);
    Jackson, 36 F.4th at 1297 (“We hold that due-process fair-notice considerations
    require us to apply the version of the Controlled Substance Act Schedules in place
    when the defendant committed the federal firearm-possession offense for which he is
    being sentenced.”).
    Sentencing provisions must give ordinary people fair notice of the
    consequences of violating a criminal statute. See Johnson v. United States, 
    576 U.S. 591
    , 595-96 (2016); United States v. Batchelder, 
    442 U.S. 114
    , 123 (1979).
    Although typically attendant to vagueness challenges, fair-notice considerations must
    also “apply with at least as much force when a statute does unambiguously delineate
    the conduct that violates it, and the defendant’s conduct does not satisfy that
    standard.” Jackson, 36 F.4th at 1300. Here, the plain language of the federal statutes
    in effect at the time of Mr. Williams’ federal offense indicates that he is not an armed
    career criminal because his prior offenses are categorically overbroad. Enhancing Mr.
    2003). Implicit in this analysis is that a prior conviction is an ACCA predicate if it
    meets the definition of “violent felony” or “serious drug offense” at the time of the
    instant federal offense—were it otherwise, then no convictions predating the passage
    of the ACCA could qualify as predicates. The government does not expressly dispute
    this general application of the ACCA, and we will not read into the ACCA an
    exception solely for the definition of “controlled substances.”
    30
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    Williams’ sentence based on a conflicting definition that predates his federal offense
    would deprive him of fair notice of the consequences of violating federal law. Thus,
    he must be sentenced according to the federal definition of “controlled substance” in
    effect at the time of his federal offense, as expressly referenced in the ACCA.
    3. The government’s counterarguments are unpersuasive.
    The government raises several arguments supporting affirmance, but none is
    availing.
    First, the government argues the Supreme Court’s decision in McNeill, 
    563 U.S. 816
    , supports its proposed time-of-prior-state-conviction rule. According to the
    government, McNeill noted “the plain text of the ACCA ‘requires the court [to]
    determine whether a “previous conviction” was for a serious drug offense,’ which is
    a ‘backward-looking question’ that can only be answered by ‘consult[ing] the law
    that applied at the time of conviction.’” Aplee. Br. at 33 (alteration in original)
    (quoting McNeill, 563 U.S. at 820).
    However, in McNeill the Supreme Court was discussing a subsequent change
    in the prior offense of conviction—and not the federal definition to which it is
    compared. It is undisputed we look to the definition of the prior state offense at the
    time of the prior state conviction—that defines what the defendant was actually
    convicted of violating. McNeill has no bearing on what version of federal law serves
    as the point of comparison for the prior state offense, which is the question here. See
    Bautista, 989 F.3d at 703 (“McNeill nowhere implies that the court must ignore
    current federal law and turn to a superseded version of the United States Code.”);
    31
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    Abdulaziz, 998 F.3d at 527 (“[T]he government’s reliance on McNeill here is
    misplaced.”); Hope, 28 F.4th at 505 (“McNeill does not prohibit us from considering
    changes to federal law for the purposes of the ACCA.”); Jackson, 36 F.4th at 1306
    (“McNeill’s reasoning, which relied on the language ‘previous convictions,’ has no
    application here.”); Perez, 
    2022 WL 3453566
    , at *4 (“[T]he reasoning in McNeill
    regarding state law does not translate to this issue concerning the federal drug
    statute.”). But see Clark, 
    2022 WL 3500188
    , at *3 (“McNeill definitively held that
    the time of conviction is the proper reference under the ACCA.”).12
    The government also relies on cases in the immigration context to support its
    position, but we are not persuaded. Immigration statutes authorize the removal of a
    non-citizen convicted of an offense related to a federal controlled substance. See
    Mellouli v. Lynch, 
    575 U.S. 798
    , 801 (2015). According to the government, in
    determining whether a non-citizen’s prior conviction authorizes their removal
    because it categorically related to a federal controlled substance, courts compare the
    state and federal drug schedules at the time of the prior conviction. See, e.g., Medina-
    Rodriguez v. Barr, 
    979 F.3d 738
    , 749 (9th Cir. 2020). Though circuit courts have
    12
    According to the Sixth Circuit, courts that have dismissed McNeill
    “insufficiently grapple with the Supreme Court’s reasoning” in that case. Clark, 
    2022 WL 3500188
    , at *6. Not so. The First, Fourth, Eighth, Ninth, and Eleventh Circuits
    meaningfully considered McNeill and correctly recognized, as we do, that McNeill
    did not contemplate what version of federal law to apply, let alone “definitively
    h[o]ld that the time of conviction is the proper reference under the ACCA.” 
    Id. at *3
    .
    The Sixth Circuit reads McNeill too broadly and offers no reason to disturb our
    holding here, which aligns with the majority of circuit courts to have considered the
    issue.
    32
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    consistently applied a “time-of-conviction” rule in the immigration context, that does
    not disturb our conclusion here that a time-of-instant-federal-offense comparison
    applies in the ACCA context.13
    Where a non-citizen is removable immediately upon being convicted of an
    offense involving a controlled substance, it makes sense to determine whether the
    conviction is a removable offense at the time of that controlled-substance conviction.
    But whether a prior conviction will serve as a predicate ACCA offense has no
    immediate impact at the time of the prior conviction. It is only after a defendant has
    three such convictions and violates 
    18 U.S.C. § 922
    (g) that a defendant can be
    deemed an armed career criminal for purposes of federal sentencing. Perez, 
    2022 WL 3453566
    , at *4 (“In the context of the ACCA, in contrast, there is no risk of
    immediate federal consequences from a state law conviction. Consequences of a prior
    conviction for ACCA purposes only arise if the person later is convicted of a
    qualifying federal offense.”).
    The justifications courts have relied on for implementing a time-of-conviction
    rule are unique to the immigration context and apply with significantly less force, if
    13
    The government claims the Supreme Court compared the schedules that
    existed “[a]t the time of [the petitioner’s] conviction” for purposes of the categorical
    approach in Mellouli. Aplee. Br. 34 (alteration in original) (quoting Mellouli, 575
    U.S. at 808). However, it is unclear whether Mellouli was in fact looking to the
    federal schedules as they existed at the time of the conviction, or just the Kansas
    schedules at the time of the conviction. Compare Medina-Rodriguez, 979 F.3d at 749
    (“[Mellouli] assumed that the time-of-conviction federal drug schedule is the
    appropriate one for the categorical approach comparison.”), with Abdulaziz, 998 F.3d
    at 530 (observing Mellouli cited to the government’s brief for the federal drug
    schedules, which in turn relied on the current federal schedules).
    33
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    at all, in the ACCA context. For example, a “time-of-conviction rule allows an
    individual ‘to anticipate the immigration consequences of a guilty plea or conviction
    at trial.’” Medina-Rodriguez, 979 F.3d at 748 (quoting Doe v. Sessions, 
    886 F.3d 203
    ,
    209 (2d Cir. 2018)). “Moreover, a time-of-conviction rule adheres to the Supreme
    Court’s general prescription that a non-citizen defendant does not receive effective
    assistance of counsel unless counsel advises that defendant of the possible
    immigration consequences of a plea to a criminal charge. A time-of-removal rule
    would make the dispensing of such advice practically impossible.” 
    Id.
     (citing Padilla
    v. Kentucky, 
    559 U.S. 356
    , 366-69 (2010)). It is difficult even to articulate what the
    comparable Sixth Amendment interest would be where the ACCA enhancement is
    concerned—the right to be advised on whether a state conviction could potentially
    combine with two other convictions to support a federal sentencing enhancement if,
    hypothetically, the defendant commits a specific federal crime in the future? The
    immigration consequences of a controlled-substance conviction are immediate, but
    no such similar concerns justify a time-of-prior-state-conviction rule in the ACCA
    context. Perez, 
    2022 WL 3453566
    , at *4.
    The government also makes several arguments that its approach serves various
    public policy principles and constitutional norms. For example, the government
    asserts the time-of-prior-state-conviction approach is consistent with the purpose of
    the ACCA, which is to increase punishment for repeat offenders. It would not,
    according to the government, make sense to allow convictions to “simply
    disappear[]” because the federal government excluded hemp in 2018. Aplee. Br. at
    34
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    37. However, as Mr. Williams persuasively argues, if Congress has decided hemp
    should not be criminalized, then surely Congress would not intend for it to continue
    to be included within the narrow class of serious crimes that contributes to a 15-year
    mandatory minimum prison sentence. See Perez, 
    2022 WL 3453566
    , at *4
    (“[R]elying on current federal definitions effectuates Congress’s intent to remove
    certain substances from classification as federal drug offenses.”).
    The government also insists that applying current definitions “would be
    inconsistent with the principle that legislation does not apply retroactively in the
    absence of a clear and unambiguous directive of retroactivity.” 
    Id. at 38
    . The
    government posits a hypothetical scenario where substances are added to the federal
    schedules, causing a once-overbroad prior conviction to become a “serious drug
    offense” under the ACCA. According to the government, this would raise “both due
    process and ex post facto concerns.” 
    Id.
     Our precedent resolves these concerns. We
    have long held that “the ACCA is not retroactive.” United States v. Springfield, 
    337 F.3d 1175
    , 1179 (10th Cir. 2003). And “every circuit court to address the issue has
    concluded that there is no ex post facto problem when a court enhances a sentence
    under the ACCA on the basis of convictions that occurred prior to the ACCA’s
    passage.” 
    Id.
     The government does not explain how enacting the ACCA raises no ex
    post facto problem but amending the definition of a term within the ACCA does. In
    any event, the government’s hypothetical is not before us.
    Finally, the government points out Oklahoma removed hemp from its
    definition of marijuana in 2015 and thus Oklahoma’s definition of marijuana has
    35
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    never been broader than the federal definition, which did not exclude hemp until
    2018. It would contravene the categorical approach, the government insists, to find a
    state statute overbroad when it has never been broader than the federal definition.
    However, as the Supreme Court reasoned in McNeill, subsequent changes in state law
    are irrelevant—we “turn[] to the version of state law that the defendant was actually
    convicted of violating.” 563 U.S. at 821. Moreover, Oklahoma’s current iteration of
    Mr. Williams’ offense of conviction is overbroad, as we held in Cantu. That
    Oklahoma’s current definition of “marijuana” is not broader than the current federal
    definition does not affect our analysis.
    Accordingly, without the ACCA enhancement, the statutory maximum term of
    imprisonment on the § 922(g) violation was 10 years. The district court’s imposition
    of 284 months (over 23 years) of imprisonment was an “illegal sentence.” Titties, 852
    F.3d at 1264. We have held such an illegal sentence is “per se[] reversible,” even
    under plain error review. Id. However, the government urges us to invoke the
    concurrent sentence doctrine and hold that any error was harmless. “Under that
    discretionary doctrine, we may hold harmless an erroneous sentence premised on a
    valid conviction if such sentence runs concurrently to an equal or longer sentence
    based upon another charge of an indictment, because the defendant suffers no actual
    prejudice from the erroneous sentence.” United States v. Segien, 
    114 F.3d 1014
    , 1021
    (10th Cir. 1997). Here, the illegal sentence runs concurrent to an equal 284-month
    sentence on the drug count.
    36
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    Mr. Williams insists we should not invoke this discretionary appellate
    doctrine, which has at times been viewed with disfavor. See United States v.
    Montoya, 
    676 F.2d 428
    , 432 (10th Cir. 1982) (“A growing realization that adverse
    collateral consequences inexorably flow from most criminal convictions has
    prompted both courts and commentators to criticize frequent application of the
    [concurrent sentence] doctrine.”). And Mr. Williams contends various collateral
    consequences flow from being designated an armed career criminal.
    We need not address the propriety of invoking the concurrent sentence
    doctrine here because we are already remanding for resentencing based on the drug-
    quantity error. On remand, the district court certainly cannot reimpose what we have
    determined is an illegal sentence. Remember the erroneous drug-quantity finding
    drove the offense level not only for the drug count, but also for the firearm count
    because a cross-reference applied. Thus, remanding for reconsideration of drug
    quantity necessarily entails resentencing on the firearm count. Under these
    circumstances, we instruct the district court to resentence Mr. Williams on the
    § 922(g) count without the illegal ACCA enhancement.
    III.   Conclusion
    The judgment is vacated. We remand for the district court to (1) make further
    drug-quantity findings and (2) resentence Mr. Williams without the ACCA
    enhancement.
    37