United States v. Ellis ( 2022 )


Menu:
  • Appellate Case: 19-3148   Document: 010110637191                         FILED Page: 1
    Date Filed: 01/26/2022
    United States Court of Appeals
    Tenth Circuit
    PUBLISH                      January 26, 2022
    Christopher M. Wolpert
    UNITED STATES COURT OF APPEALS                  Clerk of Court
    TENTH CIRCUIT
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.                                                       No. 19-3148
    MARVIN LEE ELLIS,
    Defendant - Appellant.
    Appeal from the United States District Court
    for the District of Kansas
    (D.C. No. 2:12-CR-20066-KHV-30)
    Christopher M. Joseph, Joseph, Hollander & Craft LLC, Topeka, Kansas, on the
    briefs for Defendant-Appellant.
    Carrie N. Capwell, Assistant United States Attorney (Duston J. Slinkard, Acting
    United States Attorney, with her on the brief), Office of the United States
    Attorney, Topeka, Kansas, for Plaintiff-Appellee.
    Before HOLMES, SEYMOUR, and MORITZ, Circuit Judges.
    HOLMES, Circuit Judge.
    A jury convicted Marvin Lee Ellis of, among other crimes, conspiring to
    manufacture, distribute, or possess with the intent to distribute cocaine and
    Appellate Case: 19-3148   Document: 010110637191      Date Filed: 01/26/2022     Page: 2
    cocaine base, in violation of 
    21 U.S.C. § 846
     and 
    18 U.S.C. § 2
    . The district
    court sentenced Mr. Ellis to a term of 303 months’ imprisonment, to be followed
    by 13 years of supervised release.
    The district court imposed this sentence in a resentencing proceeding. In
    Mr. Ellis’s previous appeal, we had upheld his convictions in a published decision
    but had vacated the court’s sentencing order with respect to his conspiracy
    conviction and remanded for resentencing. See United States v. Ellis (Ellis I),
    
    868 F.3d 1155
    , 1181 (10th Cir. 2017). In this appeal, Mr. Ellis presents two
    challenges. First, he contends that the district court misapplied the United States
    Sentencing Guidelines (“Guidelines” or “U.S.S.G.”) by failing to make
    particularized findings regarding the scope of his jointly undertaken criminal
    activity with his coconspirator Ataven Tatum. Second, and relatedly, Mr. Ellis
    argues that the evidence did not support a judicial finding that he agreed to
    participate in jointly undertaken criminal activity with Mr. Tatum; accordingly,
    the drug quantities associated with Mr. Tatum’s purchases of cocaine should not
    be attributed to him for sentencing purposes.
    Exercising jurisdiction under 
    28 U.S.C. § 1291
     and 
    18 U.S.C. § 3742
    , we
    affirm the district court’s sentencing judgment.
    2
    Appellate Case: 19-3148   Document: 010110637191       Date Filed: 01/26/2022     Page: 3
    I
    A
    The factual background is detailed in Ellis I. See 868 F.3d at 1160–64. We
    focus here on those factual circumstances most relevant to our resolution of Mr.
    Ellis’s appellate challenges. In 2009, the Drug Enforcement Administration
    (“DEA”) began investigating a Mexican narcotics-trafficking network that was
    supplying cocaine to the Kansas City, Kansas area. Specifically, DEA agents
    learned that powder cocaine was being distributed to Kansas City drug dealers,
    including Djuane Sykes, who in turn sold large amounts of powder cocaine to
    several customers—including the defendant, Mr. Ellis, and Mr. Tatum.
    Mr. Tatum introduced Mr. Ellis to Mr. Sykes sometime in early fall of
    2011. Shortly thereafter, Mr. Ellis and Mr. Tatum began purchasing powder
    cocaine from Mr. Sykes and cooking the cocaine into cocaine base—i.e.,
    crack—for sale to customers. Mr. Ellis’s nephew, Theoplis Ellis (“Theoplis”), 1
    assisted both men in their drug-trafficking activities, including picking up and
    delivering drugs, and was compensated on a daily basis for his services. In
    various groupings, or separately, the three men traveled to visit Mr. Sykes to
    purchase powder cocaine. For example, on between ten to fifteen occasions, Mr.
    1
    Because the defendant, Marvin Ellis, and his nephew, Theoplis Ellis,
    share the same last name, we refer hereinafter to the latter only by his first name.
    3
    Appellate Case: 19-3148   Document: 010110637191       Date Filed: 01/26/2022     Page: 4
    Ellis and Mr. Tatum traveled together to buy powder cocaine from Mr. Sykes.
    They also would journey separately to purchase powder cocaine from him. And,
    on at least one occasion, Mr. Ellis and Theoplis picked up and paid for powder
    cocaine from Mr. Sykes that Mr. Tatum had ordered.
    In early 2012, primarily in the months of February and March, the DEA
    conducted a series of controlled buys of crack cocaine—through the use of
    confidential informants (“CIs”)—from Mr. Ellis and Mr. Tatum. Some of these
    drug buys took place on various streets in Kansas City. Notably, on three
    occasions, Mr. Ellis and Mr. Tatum were together when the drug transactions took
    place. Two of the three involved the use of Mr. Tatum’s vehicle. In one
    instance, Mr. Ellis effectively acted as the go-between—shuttling between the
    CI’s vehicle and Mr. Tatum’s: Mr. Ellis entered the CI’s vehicle and obtained the
    money; took the money and delivered it to Mr. Tatum, whereupon he received the
    crack; and then he returned with the crack and handed it to the CI through the
    vehicle’s window. In another instance, a CI entered Mr. Tatum’s vehicle to
    purchase crack and reported that Mr. Ellis was present in the vehicle. And,
    during the third transaction, Mr. Ellis entered the CI’s vehicle from the
    street—delivering some pills of molly2 to him—and then, after Mr. Ellis exited
    2
    As we learn from Ellis I, molly is drug slang for “ecstasy/MDMA.”
    868 F.3d at 1161 (noting the seizure of “16 mollies” during Mr. Ellis’s arrest).
    4
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022   Page: 5
    the vehicle, Mr. Tatum entered it and sold him crack. Moreover, in one street-
    level sale that Mr. Ellis made alone to a CI, he “bragged about obtaining his crack
    cocaine from ‘Tater’”—Mr. Tatum’s nickname. R., Vol. IV, ¶ 83, at 44 (Revised
    Presentence Report (“RPSR”), filed June 25, 2018).
    Mr. Ellis and Mr. Tatum also sold crack and other illegal drugs from a
    residence that they shared at 921 Haskell Avenue (“921 Haskell”), in Kansas City,
    Kansas. And the DEA made several controlled purchases using CIs at this
    residence, including during the February 2012 time frame. By way of
    background, in October 2011, with Mr. Tatum’s financial assistance, Mr. Ellis
    had leased the 921 Haskell residence. See Ellis I, 868 F.3d at 1163 (“The lease
    required [Mr.] Ellis to pay a $300 deposit and $600 for the first month’s rent. Of
    this amount, [Mr.] Ellis paid $400, and [Mr.] Tatum paid $500.”). And, in
    November 2011, Mr. Tatum had signed a contract for deed to buy it, agreeing to
    make payments to the current owner. Mr. Ellis had assumed the responsibility for
    all of the utilities at 921 Haskell, registering them in his name.
    Mr. Ellis, Mr. Tatum, and Theoplis would primarily use a phone belonging
    to Mr. Tatum to communicate with customers regarding drug sales, including drug
    transactions carried out at 921 Haskell. Theoplis would assist in drug
    transactions that took place there. On at least one occasion when Mr. Ellis sold
    crack to a CI at 921 Haskell, Theoplis “functioned as a doorman.” R., Vol. IV, ¶
    5
    Appellate Case: 19-3148   Document: 010110637191       Date Filed: 01/26/2022    Page: 6
    78, at 43. On another occasion, a CI placed a call to Mr. Tatum’s telephone
    number and made arrangements to purchase crack cocaine at 921 Haskell;
    however, it was Mr. Ellis, not Mr. Tatum, who greeted the CI at the door and took
    the CI’s money in exchange for the crack. Moreover, a CI observed both Mr.
    Ellis and Mr. Tatum selling crack on the same occasion around early February
    2012 at 921 Haskell. Sometime around mid-April 2012, Mr. Ellis had “a falling
    out with [Mr.] Tatum,” Ellis I, 868 F.3d at 1163, apparently because Mr. Tatum
    treated Mr. Ellis “poorly and always wanted to act like the ‘boss,’” R., Vol. IV, ¶
    96, at 46. And, as a consequence, Mr. Ellis moved out of 921 Haskell.
    B
    In October 2012, a grand jury sitting in the District of Kansas issued a 112-
    count Second Superceding Indictment (the “Operative Indictment”) 3 against fifty-
    one defendants, including Mr. Ellis, Mr. Tatum, and Theoplis. Most relevant here
    is Count 1, which charged the fifty-one defendants, including Mr. Ellis, with
    violating 
    21 U.S.C. § 846
     for
    3
    The Operative Indictment was not included in the record designated
    for this appeal. However, it is discussed in Ellis I. See 868 F.3d at 1161. And,
    to offer a more comprehensive factual picture of relevant matters, we exercise our
    discretion to take judicial notice of the district court’s files containing this
    document. See, e.g., United States v. Ahidley, 
    486 F.3d 1184
    , 1192 n.5 (10th Cir.
    2007) (“[W]e may exercise our discretion to take judicial notice of publicly-filed
    records in our court and certain other courts concerning matters that bear directly
    upon the disposition of the case at hand.”).
    6
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022       Page: 7
    [k]nowingly and intentionally conspir[ing] and agree[ing]
    together and with each other, . . . to manufacture, to possess with
    intent to distribute and to distribute 280 grams or more of
    cocaine base, “crack,” . . . and to possess with intent to distribute
    and to distribute five kilograms or more of . . . cocaine . . . .
    Second Superceding Indictment, Case No. 12-20066-01 through 32 and 34
    through 52-KHV/JPO, ECF No. 245 (D. Kan., filed Oct. 3, 2012).
    A jury returned guilty verdicts against Mr. Ellis on this conspiracy charge
    (i.e., Count 1) and on his other charged offenses—including, notably, Count 100,
    which charged Mr. Ellis with maintaining a residence for the purpose of
    manufacturing and distributing cocaine and cocaine base in violation of 
    21 U.S.C. § 856
    (a)(1). In Ellis I, we affirmed all of Mr. Ellis’s convictions but, for reasons
    not relevant here, “we reverse[d] [Mr.] Ellis’s conspiracy sentence and
    remand[ed] for a full resentencing.” 868 F.3d at 1181. That resentencing is the
    subject of this appeal.
    C
    In anticipation of the resentencing proceeding, with the aid of the
    Guidelines, 4 the U.S. Probation Office prepared a Revised Presentence Report or
    the RPSR. The RPSR reported that the total drug quantity applicable to Mr. Ellis
    was 2,602.53 grams, or 2.6 kilograms, of cocaine base. It left no doubt that the
    4
    The Probation Office used the 2016 edition of the Guidelines. The
    parties do not object to this choice on appeal. Accordingly, we also rely on this
    edition in our analysis.
    7
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022    Page: 8
    cocaine base attributed to Mr. Ellis did not merely reflect his personal drug-
    trafficking activities but, rather, reflected his jointly undertaken criminal
    activities with Mr. Tatum and Theoplis. Regarding their collective endeavors, the
    RPSR expressly found that Mr. Tatum “worked in concert with Marvin Ellis and
    Theoplis Ellis, who would all work together to sell ‘crack’ cocaine to various
    street level customers.” See R., Vol. IV, ¶ 75, at 42–43. Moreover, the RPSR
    concluded that “[Mr.] Ellis [wa]s responsible for cocaine attributed to [Mr.]
    Tatum for the approximate 6 month period in which Marvin Ellis was deemed to
    be involved with [Mr.] Tatum’s drug trafficking activities.” See id., ¶ 109, at 49.
    Further, the RPSR made specific findings as to the jointly undertaken
    criminal activity involving Mr. Ellis and Mr. Tatum:
    Marvin Ellis and Ataven Tatum were involved in jointly
    undertaken criminal activity that included purchasing cocaine
    from Djuane Sykes and selling crack cocaine at various locations
    together in the community and from 921 Haskell Street. Their
    jointly undertaken criminal activity is also demonstrated by [Mr.]
    Tatum’s phone being utilized to arrange a sale that was later
    consummated by Marvin Ellis, and Marvin Ellis accompanying
    and assisting [Mr.] Tatum with drug deals.
    Id., ¶ 107. Moreover, in this same vein, the RPSR indicated that the conduct of
    Mr. Ellis and Mr. Tatum shed light on the scope of their jointly undertaken
    criminal activity. This included an instance when the two men “jointly purchased
    drugs from Djuane Sykes . . . and used the 921 Haskell residence, jointly, from
    8
    Appellate Case: 19-3148   Document: 010110637191        Date Filed: 01/26/2022      Page: 9
    which to sell crack cocaine” and, further, when “they also engaged in drug sales
    together in the community.” Id., ¶ 325, at 109 (emphasis added).
    The RPSR also emphasized the significance of the two men’s shared
    residence at 921 Haskell in establishing their jointly undertaken criminal
    activity—specifically, finding this reflected an “explicit agreement” between Mr.
    Tatum and Mr. Ellis, assigning Mr. “Ellis[] responsibility for the utilities and
    [Mr.] Tatum[] responsibility as the renter” of 921 Haskell. Id. And, notably,
    there also was an “implicit agreement” that the “two [men would] cook crack
    cocaine and sell crack cocaine from the residence.” Id. The RPSR found the
    “jointly undertaken criminal activity” was demonstrated as well by “[Mr.] Ellis
    and Theoplis [] picking up drugs that [Mr.] Tatum ordered, and [through the]
    occasional use of a common phone associated with arranging drug transactions.”
    Id.
    Having determined the applicable drug quantity, the RPSR found the base
    offense level applicable to the combined counts to be 32. Significantly, because
    Mr. Ellis “maintained a residence (921 Haskell) for the purpose of manufacturing
    or distributing a controlled substance,” the RPSR added two levels to his base
    offense level. Id., ¶ 118, at 51. With additional upward adjustments not relevant
    here, the RPSR ended up assigning Mr. Ellis an adjusted offense level of 36.
    9
    Appellate Case: 19-3148   Document: 010110637191       Date Filed: 01/26/2022   Page: 10
    Mr. Ellis objected to (among other things) the total drug quantity that the
    RPSR attributed to him; he argued that it was “improperly inflated.” Id., ¶ 288, at
    101. 5 More specifically, he challenged the attribution to him of all of the powder
    cocaine that Mr. Tatum purchased from Mr. Sykes between August 2011 and May
    2012 because, according to Mr. Ellis, the evidence failed to demonstrate that he
    had entered into an agreement with Mr. Tatum pertaining to Mr. Tatum’s
    purchases from Mr. Sykes. Mr. Ellis maintained that his dealings with Mr. Sykes
    were “independent” from Mr. Tatum’s and, more specifically, that the evidence
    established that he and Mr. Tatum “were acting as independent street level dealers
    with a common source of supply [namely Mr. Sykes], rather than pooling
    resources and profits together.” Id., ¶¶ 298–99, at 103 (citing U.S.S.G. 1B1.3,
    cmt. 4(C)(vi)). In fact, Mr. Ellis maintained that, “at least during some of the
    relevant time period,” he and Mr. Tatum were “acting as competitors.” Id., ¶ 300,
    at 103. As support, Mr. Ellis averred that the evidence showed that in one of the
    late March 2012 controlled buys, Mr. Ellis “told the [CI] to ‘not mess’ with [Mr.]
    Tatum anymore and to only contact him for drugs.” Id.
    However, the Probation Office generally rejected Mr. Ellis’s objections.
    With Mr. Ellis’s “response to the drug calculation” in mind, however, the
    5
    The Probation Office had circulated the RPSR to the parties before it
    was finalized and submitted for the court’s consideration. Mr. Ellis’s objections
    were memorialized in the RPSR’s addendum.
    10
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022    Page: 11
    Probation Office did adopt the government’s view that a “somewhat shorter time
    frame” should be used for attributing Mr. Tatum’s drug transactions to Mr.
    Ellis—specifically, the six-month period from October 2011 to April 2012. Id., ¶
    273, at 97; see id., ¶ 238, at 85 (discussing the government’s proposal that Mr.
    Ellis “should be held accountable for the drugs attributed to [Mr.] Tatum . . . for a
    6-month period, beginning in mid-October 2011, and ending in mid-April 2012”).
    D
    At the resentencing, the district court heard arguments—based on the trial
    evidence—regarding “defendant’s objection to the total drug quantity attributed to
    him.” R., Vol. III, at 57 (Sentencing Hr’g Tr., dated July 11, 2019). Mr. Ellis’s
    counsel argued that the “open issue for the [G]uideline[s] calculation” related to
    “how much crack cocaine or how much drugs to attribute to Mr. Ellis.” Id. at 59.
    He explained that the issue under the relevant conduct analysis was whether or
    not Mr. Tatum’s independent purchases fell within the scope of jointly-undertaken
    criminal activity. Citing the Tenth Circuit’s Biglow decision—apparently, the
    unpublished panel decision in United States v. Biglow, 635 F. App’x 398 (10th
    Cir. 2015) (unpublished)—Mr. Ellis’s counsel explicitly noted “we’ve objected”
    to the scope of Mr. Tatum’s purchases being attributed to Mr. Ellis. R., Vol. III,
    at 60. He emphasized that the “burden is on the government” to present sufficient
    evidence “to show that [Mr.] Tatum’s purchases . . . should be attributed to [Mr.]
    11
    Appellate Case: 19-3148    Document: 010110637191         Date Filed: 01/26/2022      Page: 12
    Ellis.” Id. at 60–61. He opined that the government fell short of satisfying this
    burden.
    The district court then heard from the government: it argued that Mr. Ellis
    and Mr. Tatum jointly engaged in buying powder cocaine and distributing crack,
    the proof of which was “adduced at trial through testimony and evidence and
    phone calls and surveillance and pictures and videos show[ing] that this activity
    was . . . within the scope of their jointly undertaken criminal activity.” Id. at
    79–80. The government contended that Mr. Ellis and Mr. Tatum used Theoplis as
    an “errand boy” to collect money and deliver drugs for them—similar to how the
    pair “jointly used the house, . . . [and] jointly used the car to go to drug deals”
    during the period of the DEA investigation. Id. at 80. Accordingly, Mr. Ellis and
    Mr. Tatum were involved in a joint criminal venture, reasoned the government,
    and it highlighted that the residence at 921 Haskell was the place—not only where
    both Mr. Tatum and Mr. Ellis lived—but also where they distributed cocaine base.
    The district court found that the government had the better argument
    regarding the scope of jointly undertaken criminal activity. Consequently, it
    overruled Mr. Ellis’s drug-quantity objection. Specifically, the court found:
    [U]nder [U.S.S.G. §] 1B1.3 subsection (a)(1)(B)[,] . . . it seems
    to me that the fact that both defendants are members of the same
    criminal conspiracy to distribute drugs . . . would establish
    jointly-undertaken criminal activity. Clearly both of them were
    engaged in drug deals and maintaining a drug house in
    furtherance of that drug criminal activity . . . .
    12
    Appellate Case: 19-3148      Document: 010110637191      Date Filed: 01/26/2022     Page: 13
    Id. at 102–03. The court also addressed whether Mr. Tatum’s drug sales were
    reasonably foreseeable to Mr. Ellis. In its analysis, the court stressed the fact that
    the two men “lived together and both did drug transactions out of the same house,
    [as to which] Mr. Ellis was responsible for utilities and had actually paid the
    down payment on the lease.” Id. at 103.
    The court concluded it was “hard-pressed” to see how the government’s
    evidence—which was materially consistent (as relevant here) with the RPSR’s
    findings—failed to satisfy the requirements of the Guidelines for attributing Mr.
    Tatum’s drugs to Mr. Ellis. Id. The court relied on the RPSR’s findings
    regarding drug quantity “as the starting point” for calculating Mr. Ellis’s offense
    level with one exception: the court determined that the total amount of cocaine
    base attributable to Mr. Ellis was 1.9 kilograms—rather than 2.6 kilograms, as the
    RPSR had found. See id. at 112–13. This alteration did not impact the offense
    level of 32, which the RPSR had calculated. The court explicitly memorialized its
    findings and conclusion in its Amended Statement of Reasons, which expressly
    recognized the court’s “adopt[ion] of the presentence investigation report [i.e.,
    the RPSR].” Id., Vol. IV, at 256 (Amended Statement of Reasons, filed July 12,
    2019).
    The district court determined that Mr. Ellis’s applicable Guidelines range
    for his offenses was 324 to 360 months’ imprisonment. This calculation excluded
    13
    Appellate Case: 19-3148   Document: 010110637191       Date Filed: 01/26/2022    Page: 14
    Mr. Ellis’s conviction under 
    18 U.S.C. § 924
    (c), for which he was subject to an
    additional 60-month consecutive sentence. The court, however, granted Mr.
    Ellis’s written request for a variance, which referenced his poor health condition.
    Specifically, the court granted Mr. Ellis a 25% downward variance. Taking the
    variance into account, the court sentenced him to a total prison term of 303
    months, to be followed by 13 years of supervised release.
    The district court filed its amended judgment, and Mr. Ellis filed a timely
    notice of appeal.
    II
    A
    First, we must consider the proper scope of our review. The parties
    disagree concerning whether Mr. Ellis has preserved his sentencing challenges or,
    alternatively, whether the standard of review for forfeited errors applies
    here—i.e., plain-error review. See, e.g., United States v. Wolfname, 
    835 F.3d 1214
    , 1217 (10th Cir. 2016) (applying the plain-error standard where the
    defendant “didn’t raise []his argument below”). Mr. Ellis asserts that he
    “objected to [the court] counting [Mr.] Tatum’s cocaine purchases as relevant
    conduct” and argued that such purchases “did not fall within the scope of relevant
    criminal activity [Mr. Ellis] agreed to jointly undertake.” Aplt.’s Opening Br. at
    19 (citing United States v. Patton, 
    927 F.3d 1087
    , 1093 (10th Cir. 2019)); see
    14
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022     Page: 15
    Aplt.’s Reply Br. at 4 (arguing that “the record shows that the ultimate question
    before this Court and the precise error [Mr.] Ellis asks this Court to reverse was
    addressed repeatedly and specifically in the district court, and, therefore,
    preserved for review”). Yet, in opposition, the government contends that we
    should review only for plain error because Mr. Ellis “did not raise his current
    objection before the district court.” Aplee.’s Resp. Br. at 16. We conclude that
    Mr. Ellis’s argument is more persuasive.
    Succinctly stated, before the district court, Mr. Ellis sufficiently informed
    the district court of the need to make particularized findings concerning the scope
    of his jointly undertaken criminal activity with Mr. Tatum to preserve an
    objection to the court’s alleged failure to make such findings. And, relatedly, Mr.
    Ellis sufficiently preserved a challenge to the drug quantities that the court
    attributed to him—specifically arguing (as relevant here) that those quantities
    improperly included drugs that Mr. Tatum purchased for distribution.
    The record fully supports our conclusion. For example, Mr. Ellis’s
    objections on these matters were memorialized as an addendum to the RPSR. See,
    e.g., R., Vol. IV, ¶ 288, at 101 (asserting that “[t]he total drug quantity attributed
    to Marvin Ellis is improperly inflated” (bold-face font omitted)); 
    id., ¶ 293
    , at 102
    (asserting that the Probation Office “erroneously attributes to [Mr.] Ellis all of the
    powder cocaine that [Mr.] Tatum purchased from [Mr.] Sykes between August
    15
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022    Page: 16
    2011 and May 2012”); 
    id., ¶ 297
    , at 103 (“The evidence does not demonstrate an
    agreement by [Mr.] Ellis to undertake any particular criminal activity with respect
    to the cocaine that [Mr.] Tatum purchased from [Mr.] Sykes—certainly not with
    respect to all of the powder cocaine [Mr.] Tatum purchased.”); 
    id., ¶ 303
    , at 104
    (“In light of the evidence establishing that [Messrs.] Tatum and Ellis functioned
    as independent distributors, even competitors, none of [Mr.] Tatum’s cocaine
    purchases should be attributed to Ellis.”); see also 
    id.,
     ¶¶ 294–97, at 102–03
    (discussing the Guidelines commentary and Tenth Circuit and other caselaw
    relating to the sentencing court’s obligation to make particularized findings as to
    the scope of jointly undertaken criminal activity).
    Furthermore, other parts of the record demonstrate that the district court
    was keenly aware that Mr. Ellis objected to the quantity of drugs that the
    Probation Office attributed to him for sentencing purposes and, more specifically,
    that Mr. Ellis grounded his drug-quantity objection primarily (as relevant here) on
    the contention that the Probation Office improperly found that he and Mr. Tatum
    had agreed to jointly undertake drug-trafficking activities. See, e.g., 
    id.,
     Vol. III,
    at 57–59 (evincing a discussion between Mr. Ellis’s counsel and the district court
    regarding the “defendant’s objection to the total drug quantity attributed to him,”
    with his counsel articulating a concern as to “how much crack cocaine or how
    much drugs to attribute to Mr. Ellis”); 
    id. at 60
     (showing, in the context of
    16
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022       Page: 17
    discussing objections, that Mr. Ellis’s counsel emphasized that “what we’re
    talking about is under relevant conduct whether or not these purchases -- and
    specifically talking about Mr. Tatum’s independent purchases, whether or not they
    were within the scope of independent -- or jointly-undertaken activity”).
    Indeed, during the sentencing hearing, the court and defense counsel
    engaged in a lengthy colloquy, in which counsel attacked the Probation Office’s
    finding regarding the scope of jointly undertaken criminal activity undertaken by
    Mr. Ellis and Mr. Tatum. See 
    id.
     at 63–70 (showing a colloquy between Mr.
    Ellis’s counsel and the court regarding Mr. Ellis’s “objecti[on] to aggregating the
    drugs from [Mr.] Tatum and [Mr. Ellis]”). And, putting aside for a moment the
    issue of whether the district court properly resolved Mr. Ellis’s objections, it
    cannot be said that the court did not consider them. See 
    id.
     at 102–05 (evincing
    the court’s consideration and explicit endeavor to resolve Mr. Ellis’s objection
    concerning the scope of jointly undertaken criminal activity and noting the view
    of Mr. Ellis’s counsel that the court’s action on that jointly undertaken scope
    issue “really kind of overwhelms . . . how much to attribute to Mr. Ellis” in terms
    of drug quantity, rendering his objection on that matter effectively “moot[]”).
    And, importantly, counsel explicitly invoked during this colloquy a Tenth
    Circuit decision (albeit unpublished) that clearly underscored a sentencing court’s
    obligation to make particularized findings regarding the scope of jointly
    17
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022      Page: 18
    undertaken criminal activity and the “key” role that such findings play in the
    attribution of drug quantities to defendants. Biglow, 635 F. App’x at 401 (“The
    scope requirement is key: it means that just knowing of coconspirators’ illicit
    activities, without more, will not suffice to attribute such activities to a defendant
    unless the activities are also within the agreement’s scope.”); see R., Vol. III, at
    60 (showing the efforts of Mr. Ellis’s counsel to analogize “the Tenth Circuit’s
    Biglow decision” to the instant case, in support of his challenge to any attempt to
    “take Mr. Tatum’s purchases and attribute [them] to Mr. Ellis,” and stating
    “we’ve objected”).
    Given these circumstances, we believe that Mr. Ellis’s counsel had done
    enough to preserve the sentencing challenges at issue here. See United States v.
    Lopez-Avila, 
    665 F.3d 1216
    , 1217–18 (10th Cir. 2011) (rejecting the
    government’s argument for plain error review; instead, concluding the defendant
    adequately preserved his issue for appeal where “the issue was properly raised
    prior to the sentencing hearing, the judge was familiar with the argument, and the
    argument was addressed by the judge”); see also Harris v. Sharp, 
    941 F.3d 962
    ,
    979 (10th Cir. 2019) (“To preserve [an] issue in [the] district court, [a party]
    need[s] only to alert the court to the issue and seek a ruling.”); cf. United States v.
    Tena-Arana, 738 F. App’x 954, 959 (10th Cir. 2018) (unpublished)
    (distinguishing the defendant’s preserved argument in Lopez-Avila from the
    18
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022     Page: 19
    argument before it by noting that, in Lopez-Avila, the defendant “explicitly raised
    and fully presented—including arguments and authorities in support—the
    procedural question raised on appeal”). 6
    B
    1
    Having concluded that Mr. Ellis has preserved the two sentencing
    challenges at issue, we inquire into the appropriate standard of review for each of
    them. In setting the stage for our analysis, let us revisit Mr. Ellis’s challenges.
    First, Mr. Ellis contends that the district court misapplied the Guidelines by
    failing to make particularized findings regarding the scope of his jointly
    undertaken criminal activity with Mr. Tatum. Second, and relatedly, Mr. Ellis
    argues that the evidence does not support a judicial finding that he agreed to
    participate in jointly undertaken criminal activity with Mr. Tatum; therefore, the
    drug quantities associated with Mr. Tatum’s six-month period of cocaine
    purchases at issue here should not be attributed to him for sentencing purposes.
    Generally speaking, “[w]e review Mr. [Ellis’s] sentence for reasonableness,
    applying a deferential ‘abuse-of-discretion standard of review.’” United States v.
    6
    We deem the reasoning of the unpublished decisions cited herein to
    be persuasive and instructive. We do not accord them controlling weight and
    recognize that they are not binding on us. See, e.g., United States v. Willis, 
    826 F.3d 1265
    , 1274 n.2 (10th Cir. 2016); United States v. Kurtz, 
    819 F.3d 1230
    , 1236
    n.2 (10th Cir. 2016).
    19
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022     Page: 20
    Morrison, 
    771 F.3d 687
    , 691 (10th Cir. 2014) (quoting Gall v. United States, 
    552 U.S. 38
    , 46 (2007)); see Lopez-Avila, 
    665 F.3d at 1218
     (“Our overall standard of
    review is abuse of discretion.”). Because both of Mr. Ellis’s challenges relate to
    the propriety of the district court’s calculation of his Guidelines sentence, our
    focus is on the procedural reasonableness of his sentence. See United States v.
    Wittig, 
    528 F.3d 1280
    , 1284 (10th Cir. 2008) (noting that the “procedural
    component” of reasonableness review “encompass[es] the method by which the
    sentence is calculated”); accord United States v. Henson, 
    9 F.4th 1258
    , 1284–85
    (10th Cir. 2021); see also United States v. Huckins, 
    529 F.3d 1312
    , 1317 (10th
    Cir. 2008) (noting that “[p]rocedural reasonableness addresses [inter alia]
    whether the district court incorrectly calculated or failed to calculate the
    Guidelines sentence”).
    In assessing procedural reasonableness, we are mindful of the generally
    applicable precept that “[w]e review factual findings for clear error and legal
    determinations de novo.” Lopez-Avila, 
    665 F.3d at
    1218–19 (italics omitted); see
    United States v. Finnesy, 
    953 F.3d 675
    , 688 (10th Cir. 2020) (“Typically ‘“we
    review legal questions regarding the application of the Sentencing Guidelines de
    novo,” and “a district court’s factual findings are reviewed only for clear error,
    giving due deference to the district court’s application of the Guidelines to the
    facts.”’” (quoting United States v. Iley, 
    914 F.3d 1274
    , 1278–79 (10th Cir.
    20
    Appellate Case: 19-3148    Document: 010110637191         Date Filed: 01/26/2022    Page: 21
    2019))); United States v. Craine, 
    995 F.3d 1139
    , 1153 (10th Cir. 2021) (“This
    court reviews ‘legal questions regarding the application of the Sentencing
    Guidelines de novo, and a district court’s factual findings . . . for clear error.’”
    (quoting Finnesy, 953 F.3d at 688)). “An error of law is per se an abuse of
    discretion.” Lopez-Avila, 
    665 F.3d at
    1219 (citing Koon v. United States, 
    518 U.S. 81
    , 100 (1996)); accord United States v. Dominguez, 
    998 F.3d 1094
    , 1104
    (10th Cir. 2021). Likewise, “[t]he district court abuses its discretion when a
    ruling is based on a clearly erroneous finding of fact.” United States v. Munoz,
    
    812 F.3d 809
    , 817 (10th Cir. 2016); accord United States v. Hull, 
    893 F.3d 1221
    ,
    1223 (10th Cir. 2018).
    2
    Turning to Mr. Ellis’s challenges, we agree with him that his first
    one—alleging that the district court erred by not making particularized
    findings—presents a question of law that we review de novo. In effect, this
    challenge posits that the district court legally erred by misapplying the
    Guidelines. See United States v. Melton, 
    131 F.3d 1400
    , 1403–04 (10th Cir.
    1997) (noting that “[w]e review the sentencing court’s application of the
    guidelines de novo,” and specifically determining that, by failing to make
    particularized findings, the sentencing court “misapplied the sentencing
    guidelines by improperly assuming that the scope of the criminal activity Mr.
    21
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022    Page: 22
    Melton agreed to jointly undertake was the same as the scope of the entire
    conspiracy”); see also United States v. Figueroa-Labrada, 
    720 F.3d 1258
    , 1264
    (10th Cir. 2013) (“A sentencing court must make particularized findings to
    support the attribution of a coconspirator’s actions to the defendant as relevant
    conduct, whether or not the defendant asks it to do so or disputes the attribution. .
    . . The absence of particularized findings is error subject to meaningful review.”
    (emphasis added) (citations omitted)).
    Mr. Ellis also contends that his second challenge—entailing an inquiry into
    whether there was sufficient evidence to support a judicial finding that he agreed
    to participate in jointly undertaken criminal activity with Mr. Tatum—also is
    subject to de novo review. However, here we must disagree.
    In arguing for de novo review, Mr. Ellis effectively urges us to follow the
    decisional path that we charted in our Melton decision. In that case, we
    concluded, first, that the sentencing court “failed to make such ‘particularized
    findings’ and misapplied the sentencing guidelines,” and, then, instead of
    ordering a “remand for further proceedings” on the scope of jointly undertaken
    criminal activity, we conducted our own independent, de novo inquiry regarding
    whether the evidence was sufficient to support the alleged scope of such jointly
    undertaken activity and concluded that it was not. See Melton, 
    131 F.3d at 1404
    .
    22
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022     Page: 23
    We suggested that we were permitted to conduct such a de novo inquiry “because
    the facts underlying the determination are undisputed.” 
    Id.
    With an explicit citation to Melton, see Aplt.’s Opening Br. at 24, Mr. Ellis
    effectively says, so too here. He reasons that, “remand for further proceedings on
    the scope of [Mr. Ellis’s] agreement is not needed,” because “the parties do not
    dispute the facts themselves, but only their import for assessing the scope of [Mr.
    Ellis’s] agreement.” 
    Id.
     He says that we independently “should make the
    ultimate determination as to whether the facts in the record prove that [Mr. Ellis]
    agreed to undertake any particular activity with respect to the cocaine that [Mr.]
    Tatum purchased from [Mr.] Sykes,” and, based on this assessment, we should
    conclude that the government did not carry its burden to establish such jointly
    undertaken criminal activity. Id.; see also Aplt.’s Reply Br. at 10 (asserting that
    the district court erred in not making particularized findings and noting that
    “[s]uch error requires reversal,” then urging us “to make an independent
    determination that the government has failed to prove that [Mr. Ellis] agreed to
    jointly distribute the cocaine [Mr.] Tatum purchased from [Mr.] Sykes”).
    However, Mr. Ellis’s standard-of-review argument is fundamentally flawed.
    It is premised on Mr. Ellis’s unstated belief that, as an antecedent matter, we will
    agree with him that the district court legally erred in not making particularized
    findings regarding the scope of jointly undertaken criminal activity—as the panel
    23
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022     Page: 24
    did in Melton. And, once we have reached that conclusion, Mr. Ellis tacitly
    reasons that we will be free—like the Melton panel—to independently assess (i.e.,
    de novo) the sufficiency of the government’s evidence concerning the scope of
    jointly undertaken criminal activity. But, for reasons we explicate infra, Mr.
    Ellis’s premise is wrong: we do not conclude that the district court failed in its
    duty to make particularized findings concerning the scope of jointly undertaken
    criminal activity. In reaching such a holding, we effectively undercut the
    apparent foundation for Mr. Ellis’s argument—based on the example of Melton.
    Furthermore, it does not appear, in light of our consideration of Mr. Ellis’s
    briefing, that he has a backup argument—not tethered to Melton’s example—for
    the application of de novo review to the question of the sufficiency of the
    evidence to support the court’s finding concerning the scope of jointly undertaken
    criminal activity. That is to say, it does not appear that Mr. Ellis has a backup
    argument for de novo review that does not depend on us concluding, as an
    antecedent matter, that the court legally erred by not making particularized
    findings—a conclusion that we ultimately do not make. In particular, Mr. Ellis
    offers no argument that at least assumes for the sake of argument that we would
    conclude—as we do—that the district court did not err in making particularized
    findings. Thus, the Melton-based argument that Mr. Ellis tacitly makes is
    24
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022   Page: 25
    bootless because we do not conclude that the district court erred as to
    particularized findings, and he has no backup.
    To be sure, citing our Patton decision, Mr. Ellis contends that “the ultimate
    determination of relevant conduct is subject to de novo review.” Aplt.’s Opening
    Br. at 19 (citing Patton, 927 F.3d at 1093); accord Aplt.’s Reply Br. at 10. And
    the government agrees. See Aplee.’s Resp. Br. at 24 (citing Patton, 927 F.3d at
    1093, and United States v. Damato, 
    672 F.3d 832
    , 838 (10th Cir. 2012), for the
    same proposition). Yet, even assuming that is so, it does not ineluctably follow
    that the evidentiary sufficiency of the court’s findings as to subsidiary issues that
    make up the ultimate relevant conduct determination—such as the scope of jointly
    undertaken criminal activity, see U.S.S.G. § 1B1.3(a)(1)(B)(i)—are also reviewed
    de novo. See United States v. Garcia, 
    946 F.3d 1191
    , 1202 (10th Cir. 2020)
    (“[I]rrespective of the character of this ultimate relevant-conduct determination,
    [the defendant’s] challenge here turns on whether the record provides a proper
    foundation for certain subsidiary ‘factual findings in support of a determination of
    relevant conduct.’” (quoting United States v. Griffith, 
    584 F.3d 1004
    , 1012 (10th
    Cir. 2009))). 7
    7
    We recognized in Garcia that there is internal tension in our caselaw
    concerning whether the overarching determination of relevant conduct is a
    question of law reviewed de novo or, instead, one of fact that we review for clear
    error. See Garcia, 946 F.3d at 1202; see also United States v. Craig, 808 F.3d
    (continued...)
    25
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022     Page: 26
    And, as to the scope question, our caselaw is clear— de novo review does
    not apply to the subsidiary finding concerning the scope of jointly undertaken
    criminal activity. We review the evidentiary sufficiency of a district court’s
    finding as to the scope of jointly undertaken criminal activity only for clear error.
    See United States v. Sells (Sells II), 
    541 F.3d 1227
    , 1235 (10th Cir. 2008) (“A
    district court’s determination of the quantity of drugs attributable to a defendant,
    including the subsidiary questions of whether drugs were reasonably foreseeable
    to a defendant and within the scope of the jointly undertaken criminal activity, is
    a determination of fact reviewed only for clear error.” (emphasis added)); see also
    United States v. Lauder, 
    409 F.3d 1254
    , 1267 (10th Cir. 2005) (considering “the
    sufficiency of the evidence” regarding a district court’s determination of drug
    quantities attributable to the defendant and concluding that it “did not clearly err”
    in defining the scope of the defendant’s jointly undertaken criminal activity); cf.
    United States v. Tocco, 
    306 F.3d 279
    , 284 (6th Cir. 2002) (“A district court’s
    finding that the criminal acts of others in a jointly undertaken criminal activity are
    7
    (...continued)
    1249, 1255 (10th Cir. 2015) (“We have been inconsistent in our decisions about
    whether a relevant conduct determination is a factual finding we must review for
    clear error or a legal conclusion we must review de novo.”). However, as in
    Garcia, “[w]e need not delve into this matter further,” 946 F.3d at 1202,
    because—as we discuss infra—it is clear that subsidiary issues like the scope of
    jointly undertaken criminal activity are factual in nature, and a court’s
    determination of such issues is thus reviewed only for clear error.
    26
    Appellate Case: 19-3148     Document: 010110637191      Date Filed: 01/26/2022    Page: 27
    reasonably foreseeable and in furtherance of the jointly undertaken criminal
    activity is reviewable for clear error.”).
    In sum, contrary to Mr. Ellis’s arguments, we review his second challenge
    under the clear-error standard. This is a “deferential” standard. United States v.
    Nkome, 
    987 F.3d 1262
    , 1276 (10th Cir. 2021). Under this standard, “[i]f the
    ‘court’s account of the evidence is plausible in light of the record viewed in its
    entirety,’ we may not reverse it even if we might have weighed the evidence
    differently.” United States v. Piper, 
    839 F.3d 1261
    , 1271 (10th Cir. 2016)
    (quoting Anderson v. City of Bessemer City, 
    470 U.S. 564
    , 574 (1985)); see
    United States v. Torres, 
    53 F.3d 1129
    , 1144 (10th Cir. 1995) (“To constitute clear
    error, we must be convinced that the sentencing court’s finding is simply not
    plausible or permissible in light of the entire record on appeal, remembering that
    we are not free to substitute our judgment for that of the district judge.”). “Where
    there are two permissible views of the evidence, the factfinder’s choice between
    them cannot be clearly erroneous.” Anderson, 
    470 U.S. at 574
    .
    III
    We turn now to consider Mr. Ellis’s two sentencing challenges. We begin
    with a brief overview of the relevant substantive law. And then we consider the
    merits of the challenges and determine that they do not warrant relief.
    A
    27
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022    Page: 28
    “District courts calculate sentences by first determining the Guidelines
    section applicable to the statute under which the defendant was convicted.”
    Figueroa-Labrada, 720 F.3d at 1265. As relevant here, the jury convicted Mr.
    Ellis under 
    21 U.S.C. § 846
     for conspiracy to possess with the intent to distribute
    cocaine and cocaine base. Section 2D1.1 of the Guidelines applies to “Unlawful
    Manufacturing, Importing, Exporting, Trafficking, or Possession”—including
    conspiracy to possess with intent to distribute a controlled substance. U.S.S.G.
    § 2D1.1. The Guidelines base offense level is determined by the amount of the
    controlled substance—here, cocaine or cocaine base—that is properly attributable
    to the defendant. See id. § 2D1.1(a)(5).
    At sentencing, a district court considers the offense of conviction’s relevant
    conduct. Relevant conduct includes “all acts and omissions committed, aided,
    abetted, counseled, commanded, induced, procured, or willfully caused by the
    defendant”; and, “in the case of a jointly undertaken criminal activity, . . . all acts
    and omissions of others that were: (i) within the scope of the jointly undertaken
    criminal activity, (ii) in furtherance of that criminal activity, and (iii) reasonably
    foreseeable in connection with that criminal activity.” Id. § 1B1.3(a)(1)(A), (B)
    (emphasis added) (indenting omitted).
    More specifically, in addition to a defendant’s own criminal activities, the
    Guidelines commentary clarifies:
    28
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022       Page: 29
    With respect to offenses involving contraband (including
    controlled substances), the defendant is accountable . . . in the
    case of a jointly undertaken criminal activity under subsection
    (a)(1)(B), [for] all quantities of contraband that were involved in
    transactions carried out by other participants, if those
    transactions were within the scope of, and in furtherance of, the
    jointly undertaken criminal activity and were reasonably
    foreseeable in connection with that criminal activity.
    Id. cmt. 3(D).
    Mr. Ellis’s arguments only implicate the scope of agreement criterion. In
    this regard, it is important to highlight that this is an “independent and necessary
    element[] of relevant conduct under §1B1.3(a)(1)(B).” United States v. Green,
    
    175 F.3d 822
    , 837 (10th Cir. 1999) (quoting United States v. Carreon, 
    11 F.3d 1225
    , 1235 (5th Cir. 1994)); accord United States v. Willis, 
    476 F.3d 1121
    , 1129
    (10th Cir. 2007); see also Patton, 
    476 F.3d at 1094
     (discussing § 1B1.3(a)(1)(B)’s
    definition of relevant conduct, and noting “[u]nder that definition, scope of the
    agreement, furtherance, and reasonable foreseeability are ‘independent and
    necessary elements of relevant conduct’” (quoting Willis, 
    476 F.3d at 1129
    )).
    “Each member of a conspiracy may have had a different scope of jointly
    undertaken criminal activity and therefore different relevant conduct.” Figueroa-
    Labrada, 720 F.3d at 1265. As the Guidelines commentary helpfully explains:
    Because a count may be worded broadly and include the conduct
    of many participants over a period of time, the scope of the
    “jointly undertaken criminal activity” is not necessarily the same
    as the scope of the entire conspiracy, and hence relevant conduct
    is not necessarily the same for every participant. . . . [T]he court
    29
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022    Page: 30
    must first determine the scope of the criminal activity the
    particular defendant agreed to jointly undertake (i.e., the scope
    of the specific conduct and objectives embraced by the
    defendant’s agreement).
    U.S.S.G. § 1B1.3 cmt. 3(B). Determining the scope of the agreement that a
    particular defendant joined in relation to the conspiracy as a whole requires the
    district court, at sentencing, “to analyze, and make ‘particularized findings’
    about[] the scope of the specific agreement.” Melton, 
    131 F.3d at 1404
     (quoting
    United States v. Thomas, 
    114 F.3d 228
    , 255 (D.C. Cir. 1997)).
    “The government bears the burden of proving by a preponderance of the
    evidence that the conduct of co-conspirators is to be attributed to the defendant
    for sentencing purposes.” Id. at 1403. After hearing from the parties, in certain
    instances, the district court is permitted to adopt the presentence report’s
    findings. 8 And, when that happens, “we review the information in [the report] as
    8
    As we discuss infra, Mr. Ellis disputes the government’s position
    that the district court here adopted the findings of the operative presentence
    report—that is, the RPSR. See, e.g., Aplt.’s Reply Br. at 9 (noting that “the
    district court in this case never expressly adopted the report’s factual findings”).
    Yet, notably, Mr. Ellis does not contend that the district court was legally
    precluded from adopting the RPSR’s findings because his arguments triggered the
    court’s “Rule 32 fact-finding obligation”—that is, because his arguments
    identified a specific “factual inaccuracy” or inaccuracies in the RPSR. United
    States v. Rodriguez-Delma, 
    456 F.3d 1246
    , 1253 (10th Cir. 2006); cf. 
    id. at 1253
    (noting that where the defendant only attacks a district court’s application of the
    Guidelines to the historical facts, the fact-finding obligation is not triggered);
    accord United States v. Cereceres-Zavala, 
    499 F.3d 1211
    , 1214 (10th Cir. 2007).
    Indeed, on appeal, Mr. Ellis insists that the historical facts are not in dispute; at
    (continued...)
    30
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022      Page: 31
    if it were the findings of the district court.” Figueroa-Labrada, 720 F.3d at 1266;
    see also United States v. Sells (Sells I), 
    477 F.3d 1226
    , 1242 (10th Cir. 2007)
    (considering the presentence report’s findings “adopted” by the sentencing court,
    in determining whether the court’s findings were legally sufficient).
    B
    Mr. Ellis first challenges the sentencing court’s failure to make
    particularized findings regarding the alleged scope of his jointly undertaken
    criminal activity with Mr. Tatum. See Aplt.’s Opening Br. at 20–24. He focuses
    on the court’s statement that “the fact that both [Mr. Tatum and Mr. Ellis] are
    members of the same criminal conspiracy to distribute drugs . . . would establish
    jointly-undertaken criminal activity[,] . . . so really the question is whether the
    sales by Mr. Tatum are reasonably foreseeable to Mr. Ellis.” Aplt.’s Opening Br.
    at 22–23 (bold-face font omitted) (quoting R., Vol. III, 102–03). Mr. Ellis
    contends that “[a]ssuming [that] the scope of the criminal activity a co-
    8
    (...continued)
    issue here, he says, is “only their import for assessing the scope of [Mr. Ellis’s]
    agreement to jointly undertake criminal activity.” Aplt.’s Reply Br. at 16; see
    Aplt.’s Opening Br. at 24 (noting, as to the scope determination, “the parties do
    not dispute the facts themselves, but only their import for assessing the scope of
    [Mr. Ellis’s] agreement”). In any event, given Mr. Ellis’s silence on the matter in
    his briefing, any Rule 32 argument of this sort would be waived. See, e.g., United
    States v. Bowline, 
    917 F.3d 1227
    , 1231 (10th Cir. 2019) (noting that “when a
    party omits an argument from its opening brief, an appellate court has no
    obligation to consider that argument”).
    31
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022     Page: 32
    conspirator agreed to jointly undertake is the same []as the scope of the entire
    conspiracy is a misapplication of the Sentencing Guidelines.” 
    Id.
     at 21 (citing
    Melton, 
    131 F.3d at 1404
    ). And, relying on our unpublished decision in Biglow,
    Mr. Ellis highlights that a panel of our court has “specifically rejected” this
    “shortcut[]” in the relevant conduct analysis. See 
    id.
     at 22 (citing Biglow, 635 F.
    App’x at 401).
    Mr. Ellis’s argument is not without legal foundation: a sentencing court
    “must make particularized findings about the scope of a defendant’s jointly
    undertaken criminal activity to determine the correct amount of drugs attributable
    to him.” Figueroa-Labrada, 720 F.3d at 1266 (citing Green, 
    175 F.3d at 837
    );
    see also Melton, 
    131 F.3d at 1404
     (“Proper attribution at sentencing requires the
    district court to analyze, and make ‘particularized findings’ about, the scope of
    the specific agreement the individual defendant joined in relation to the
    conspiracy as a whole.” (quoting Thomas, 
    114 F.3d at 255
    )). And this judicial
    obligation stems naturally from the established proposition that “the scope of the
    ‘jointly undertaken criminal activity’ is not necessarily the same as the scope of
    the entire conspiracy.” U.S.S.G. § 1B1.3 cmt. 3(B).
    Consequently, insofar as the district court’s statement that Mr. Ellis
    identifies could be construed as demonstrating that the court categorically equated
    the scope of Mr. Ellis’s jointly undertaken criminal activity with Mr. Tatum, to
    32
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022    Page: 33
    the scope of the overall conspiracy in which he and Mr. Tatum were participants,
    we would be constrained to conclude that the court committed legal error. That
    is, we would be obliged to conclude that the court committed legal error by not
    making particularized findings concerning the scope of the jointly undertaken
    criminal activity that Mr. Ellis agreed to participate in with Mr. Tatum—i.e., it
    erred by doing no more than simply finding that they were involved in the same
    conspiracy. See, e.g., Willis, 
    476 F.3d at 1130
     (determining that there was
    reversible error where “the District Court failed to make particularized findings
    about the scope of the criminal activity to which [the defendant] agreed”; instead,
    the court referred summarily and enigmatically to the evidence that it heard at
    trial and made comments that were not consistent with holding the defendant
    responsible for a “portion of the crime”); Green, 
    175 F.3d at 837
     (concluding that
    the court committed reversible legal error by failing to “make particularized
    findings which are supported in the record about the scope of [the defendant’s]
    agreement” to participate in the charged conspiracy, and it was “not sufficient”
    for the court to find that the defendant was involved in a drug-trafficking
    conspiracy with his coconspirator to hold him responsible for the illegal drugs
    personally attributable to that coconspirator); Melton, 
    131 F.3d at 1404
     (“The
    district court failed to make such ‘particularized findings’ and misapplied the
    sentencing guidelines by improperly assuming that the scope of the criminal
    33
    Appellate Case: 19-3148    Document: 010110637191          Date Filed: 01/26/2022   Page: 34
    activity [the defendant] agreed to jointly undertake was the same as the scope of
    the entire conspiracy, including the reverse sting.”).
    Here, the district court’s findings were not entirely devoid of particularity.
    For example, the court did refer to the “drug deals” that the two men engaged in
    and their “maintaining a drug house in furtherance of that drug criminal activity.”
    R., Vol. III, at 103. However, we acknowledge that, if read in isolation, the
    district court’s statement that Mr. Ellis identifies plausibly could be read as
    indicating that the court impermissibly equated the scope of the overall
    conspiracy that Mr. Ellis and Mr. Tatum were criminally charged with
    participating in with the scope of the jointly undertaken criminal activity that Mr.
    Ellis agreed to participate in with Mr. Tatum. However, as we typically do in
    considering possible sentencing error, we do not read particular statements of the
    district court in isolation; rather, we must interpret their import in the context of
    the whole record. Cf. United States v. Lente, 
    759 F.3d 1149
    , 1174 (10th Cir.
    2014) (considering “the entire record” in discerning whether the district court
    committed sentencing error); United States v. Alapizco-Valenzuela, 
    546 F.3d 1208
    , 1221 (10th Cir. 2008) (same). In so doing, we reject Mr. Ellis’s first
    challenge.
    Specifically, in viewing the entire record, we conclude that the district
    court adopted the RPSR’s findings concerning the scope of Mr. Ellis’s jointly
    34
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022       Page: 35
    undertaken criminal activity with Mr. Tatum, and those findings—as to
    particularity—convincingly pass legal muster. See Figueroa-Labrada, 720 F.3d
    at 1267 (“[T]he district court must make particularized findings (or adopt
    particularized findings made in the [presentence report]) on both jointly
    undertaken criminal activity and reasonable foreseeability before attributing the
    actions of coconspirators to a defendant as relevant conduct.”); cf. United States
    v. Godinez-Perez, 
    864 F.3d 1060
    , 1063–64 (10th Cir. 2016) (elaborating on how
    the court’s adoption of the presentence report’s factual findings could not cure its
    error in failing to make findings concerning the scope of jointly undertaken
    criminal activity because the presentence report itself also did not include
    findings as to such scope); Sells I, 
    477 F.3d at 1242
     (like Godinez-Perez,
    concluding that the district court erred because, “[a]lthough the district court
    adopted the findings contained in the [presentence report], the [report] did not
    make particularized determinations with respect to [the scope of the criminal
    activity]”).
    We start by explaining the basis for our conclusion as to the court’s
    adoption of the RPSR’s findings. Recall that, at the resentencing hearing, the
    district court properly heard the parties’ arguments, which directed the court to
    key portions of the trial evidence bearing on the drug quantity computations and,
    more specifically, the related question of the scope of jointly undertaken criminal
    35
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022      Page: 36
    activity. Then, the court effectively determined that the government’s marshaling
    of evidence provided adequate proof of the RPSR’s findings regarding the
    applicable drug quantity, and (with an exception not relevant here) the court
    expressly used the RPSR’s recommended drug quantity as the “starting point for”
    its sentencing analysis. R., Vol. III, at 113.
    The RPSR’s recommended drug quantity of course was, in significant part,
    directly predicated on its findings concerning the scope of Mr. Ellis’s jointly
    undertaken criminal activity with Mr. Tatum. 
    Id.,
     Vol. IV, ¶ 109, at 49 (Mr.
    “Ellis is responsible for cocaine attributed to [Mr.] Tatum for the approximate 6
    month period in which [Mr.] Ellis was deemed to be involved with [Mr.] Tatum’s
    drug trafficking activities (ending in mid-April 2012).”); see 
    id.,
     ¶¶ 107–08
    (discussing “the jointly undertaken criminal activity that included purchasing
    cocaine from Djuane Sykes and selling crack cocaine at various locations together
    in the community and from 921 Haskell Street” and noting that Mr. “Ellis is
    assessed cocaine base” based on those purchases). Consequently, based just on
    our consideration of the sentencing transcript, alone, we might reasonably
    conclude that—when the court explicitly relied on the RPSR’s drug quantity
    recommendation (i.e., adopting it)—it likewise effectively adopted the RPSR’s
    findings concerning the scope of Mr. Ellis’s jointly undertaken criminal activity
    with Mr. Tatum. That is so because the RPSR’s scope findings served as an
    36
    Appellate Case: 19-3148     Document: 010110637191        Date Filed: 01/26/2022    Page: 37
    essential predicate for its drug quantity recommendation, which the court
    endorsed.
    However, we need not rely on the sentencing transcript alone. This is true
    because the court subsequently made its intentions explicit and crystal clear
    concerning its adoption of the RPSR’s findings—including its findings regarding
    the scope of jointly undertaken criminal activity. Specifically, with the exception
    of the previously mentioned slight adjustment in drug quantity which is not at
    issue here, the court expressly stated, in its Amended Statement of Reasons, that
    it “adopts the presentence investigation report [i.e., the RPSR].” R., Vol. IV, at
    256. Surveying the entire record, including this statement, we therefore have no
    difficulty concluding that the district court adopted the RPSR’s findings
    concerning the scope of Mr. Ellis’s jointly undertaken criminal activity with Mr.
    Tatum.
    Unlike Mr. Ellis, we do not believe that this conclusion is forestalled by the
    fact that the district court did not orally state in explicit terms at the resentencing
    hearing that it adopted the RPSR’s findings—as the court most notably did in
    Figueroa-Labrada, 720 F.3d at 1263 (describing and quoting the district court’s
    explicit adoption). See Aplt.’s Reply Br. at 9 (citing Figueroa-Labrada, and
    stating: “The government claims this error is remedied because the district court
    adopted the findings of fact in the [R]PSR. Unlike the judges in the cases cited
    37
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022      Page: 38
    by the government, however, the district court in this case never expressly
    adopted the report’s factual findings.” (emphasis added)). Mr. Ellis does not cite
    any controlling authority that would have required the district court to make such
    an explicit oral statement of adoption in order to accomplish that result.
    As we analyze the situation, the best that the court’s lack of an explicit
    oral statement at the sentencing hearing that adopted the RPSR’s findings
    possibly could do for Mr. Ellis is render the court’s intentions on this matter
    ambiguous. Though we do not opine that this is so, even if it were, the court’s
    subsequent explicit written statement in its Amended Statement of Reasons
    certainly would negate any such ambiguity, making clear the court’s intention to
    adopt the RPSR’s findings—including its findings concerning the scope of jointly
    undertaken criminal activity. See United States v. Pankow, 
    884 F.3d 785
    , 791
    (7th Cir. 2018) (“In addition to the court’s remarks at sentencing, we also look to
    the written statement of reasons to evaluate the sufficiency of the sentencing
    rationale.”); cf. United States v. Ford, 675 F. App’x 832, 835 (10th Cir. 2017)
    (unpublished) (“Because the oral explanation for the sentence is ambiguous, we
    look to the record, including the written statement of reasons, to discern the
    court’s intent in imposing the sentence. The statement of reasons resolves any
    ambiguity here: it makes clear that the court adopted the [presentence report] . . .
    .” (citation omitted)); cf. also United States v. Schock, 
    862 F.3d 563
    , 570 (6th
    38
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022      Page: 39
    Cir. 2017) (“When the oral sentence is ambiguous, however, we look to the
    district court’s written judgment, commitment order, and statement of reasons.”);
    United States v. Brown, 
    808 F.3d 865
    , 871 (D.C. Cir. 2015) (ruling that, “[w]hile
    these statements [at the sentencing hearing] suggest some confusion on the part of
    the trial judge, the Statement of Reasons form clarifies his understanding”).
    Therefore, based on our consideration of the entire record, we conclude that
    the district court adopted, as its own, the RPSR’s findings concerning Mr. Ellis’s
    scope of jointly undertaken criminal activity with Mr. Tatum. See, e.g.,
    Figueroa-Labrada, 720 F.3d at 1266 (noting that, when the court adopts the
    presentence report, “we review the information in [that report] as if it were the
    findings of the district court”). And the RPSR made particularized findings
    concerning this matter, stating:
    Marvin Ellis and Ataven Tatum were involved in jointly
    undertaken criminal activity that included purchasing cocaine
    from Djuane Sykes and selling crack cocaine at various locations
    together in the community and from 921 Haskell Street. Their
    jointly undertaken criminal activity is also demonstrated by [Mr.]
    Tatum’s phone being utilized to arrange a sale that was later
    consummated by Marvin Ellis, and Marvin Ellis accompanying
    and assisting [Mr.] Tatum with drug deals.
    R., Vol. IV, ¶ 107, at 49.
    More specifically, the RPSR found that there was evidence of both an
    explicit and implicit agreement between Mr. Ellis and Mr. Tatum regarding their
    use of the 921 Haskell residence for drug trafficking. The explicit agreement
    39
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022    Page: 40
    assigned “[Mr.] Ellis[] responsibility for the utilities[,] and [Mr.] Tatum[]
    responsibility as the renter” of 921 Haskell. Id., ¶ 325, at 109. Their implicit
    agreement was for them both to “cook crack cocaine” at the residence and to “sell
    crack cocaine from the residence.” Id. The RPSR underscored that “[t]he jointly
    undertaken criminal activity is also demonstrated by [Mr. Ellis] and Theoplis Ellis
    picking up drugs that [Mr.] Tatum had ordered, and [the] occasional use of a
    common phone associated with arranging drug transactions.” Id.
    We conclude that it is beyond peradventure that the RPSR’s findings are
    sufficiently particularized regarding the scope of Mr. Ellis’s jointly undertaken
    criminal activity involving Mr. Tatum. Unlike in Godinez-Perez, for example, the
    RPSR’s findings have the effect of “specifically linking” Mr. Ellis’s drug
    trafficking activities with similar activities that the investigation traced to Mr.
    Tatum. 864 F.3d at 1063. And those findings of the RPSR—and, consequently,
    of the district court itself—do not make the mistake that we identified in Melton
    of “improperly assuming that the scope of the criminal activity [Mr. Ellis] agreed
    to jointly undertake was the same as the scope of the entire conspiracy.” 
    131 F.3d at 1404
    . Nor do the RPSR’s findings provide only “bare-bones information”
    linking the drug distribution activities of Mr. Ellis and Mr. Tatum. United States
    v. Flores-Alvarado, 
    779 F.3d 250
    , 257 (4th Cir. 2015).
    40
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022    Page: 41
    Consequently, where the presentence report has made legally sufficient
    particularized findings regarding jointly undertaken criminal activity, as here, and
    the district court has adopted those findings as its own, it cannot be said that the
    court erred by failing to make particularized findings regarding the scope of the
    defendant’s jointly undertaken criminal activity. See, e.g., Figueroa-Labrada,
    720 F.3d at 1267. Accordingly, Mr. Ellis’s first challenge fails.
    C
    Regarding his second challenge, Mr. Ellis contends that the record does not
    support the district court’s finding regarding the scope of his jointly undertaken
    criminal activity with Mr. Tatum. According to Mr. Ellis, the “evidence does not
    prove that [Mr.] Tatum and [Mr. Ellis] agreed to work toward a mutual goal with
    respect to the cocaine [Mr.] Tatum purchased from [Mr.] Sykes.” Aplt.’s Opening
    Br. at 25. Instead, Mr. Ellis argues that he and Mr. Tatum were “engaged in
    separate, rival business operations,” and they were actually “competitors.” Id. In
    this same vein, citing the illustration found in Guidelines § 1B1.3 cmt.
    (4)(C)(vi), Mr. Ellis contends that the record reveals “critical evidence that the
    men functioned as independent dealers with a common source of
    supply”—namely, Mr. Sykes—and that such evidence does not legally support a
    finding of jointly undertaken criminal activity. Id. at 28.
    41
    Appellate Case: 19-3148     Document: 010110637191       Date Filed: 01/26/2022       Page: 42
    However, Mr. Ellis’s arguments are unpersuasive. There was ample record
    evidence to support the district court’s finding concerning the scope of jointly
    undertaken criminal activity between Mr. Ellis and Mr. Tatum. Even if that were
    not so, we certainly could not conclude that the district court’s finding on this
    point is not plausible in light of the record evidence. Accordingly, in all events,
    the court’s finding survives scrutiny and is not reversible, given our deferential
    clear-error standard. See, e.g., Piper, 839 F.3d at 1271 (noting that “[i]f the
    ‘court’s account of the evidence is plausible in light of the record viewed in its
    entirety,’ we may not reverse it even if we might have weighed the evidence
    differently” (quoting Anderson, 
    470 U.S. at 574
    )); Torres, 
    53 F.3d at 1144
    (stating that, “[t]o constitute clear error, we must be convinced that the sentencing
    court’s finding is simply not plausible or permissible in light of the entire record
    on appeal”).
    We begin with a brief overview of the legal backdrop against which the
    district court made its finding. In particular, the Guidelines commentators
    provide helpful benchmarks to courts in applying the “jointly undertaken criminal
    activity” requirement, including the following:
    [T]he court may consider any explicit agreement or implicit
    agreement fairly inferred from the conduct of the defendant and
    others. Accordingly, the accountability of the defendant for the
    acts of others is limited by the scope of his or her agreement to
    jointly undertake the particular criminal activity. Acts of others
    that were not within the scope of the defendant’s agreement, even
    42
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022       Page: 43
    if those acts were known or reasonably foreseeable to the
    defendant, are not relevant conduct under subsection (a)(1)(B).
    U.S.S.G. § 1B1.3 cmt. 3(B) (emphases added).
    In particular, the Guidelines commentators offer illustrations to clarify the
    factual circumstances under which the requirement is satisfied, including the
    illustration found in comment (4)(C)(vi)—which Mr. Ellis looks to for support:
    Defendant P is a street-level drug dealer who knows of other
    street-level drug dealers in the same geographic area who sell the
    same type of drug as he sells. Defendant P and the other dealers
    share a common source of supply, but otherwise operate
    independently. Defendant P is not accountable for the quantities
    of drugs sold by the other street-level drug dealers because he is
    not engaged in a jointly undertaken criminal activity with them.
    In contrast, Defendant Q, another street-level drug dealer, pools
    his resources and profits with four other street-level drug dealers.
    Defendant Q is engaged in a jointly undertaken criminal activity
    and, therefore, he is accountable under subsection (a)(1)(B) for
    the quantities of drugs sold by the four other dealers during the
    course of his joint undertaking with them because those sales
    were within the scope of the jointly undertaken criminal activity,
    in furtherance of that criminal activity, and reasonably
    foreseeable in connection with that criminal activity.
    Id. cmt. 4(C)(vi) (emphasis added).
    With this legal backdrop in mind, the record provided ample evidence for
    the district court’s finding that Mr. Ellis and Mr. Tatum were jointly engaged in
    criminal activity—encompassing the purchase of cocaine and the sale of
    crack—during the critical six-month period that Mr. Tatum was buying cocaine
    43
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022    Page: 44
    from Mr. Sykes. Perhaps the most obvious indicator during this period of such
    jointly undertaken criminal activity relates to the 921 Haskell residence.
    The two men shared the 921 Haskell residence and used it to distribute
    cocaine base and other illegal narcotics. Mr. Ellis and Mr. Tatum not only were
    aware of each other’s drug-trafficking activities at this residence, but they also
    pooled their resources in a number of respects that had the obvious effect of
    facilitating their trafficking activities. With Mr. Tatum’s financial assistance, Mr.
    Ellis had leased the 921 Haskell residence. Subsequently, Mr. Tatum later signed
    a contract for deed to buy it, agreeing to make payments to the current owner.
    And, because all of the utilities—including the electricity—were in Mr. Ellis’s
    name, he literally was responsible for keeping the lights on for the men’s drug-
    trafficking operation. Mr. Ellis and Mr. Tatum also would share the phone
    belonging to Mr. Tatum to communicate with customers regarding drug sales.
    Furthermore, both men used the services of Theoplis in carrying out their
    drug-trafficking activities at 921 Haskell; among other services, Theoplis
    “functioned as a doorman.” R., Vol. IV, ¶ 78, at 43. Theoplis was compensated
    for his services daily, and the district court could have reasonably inferred
    that—since he worked for both Mr. Ellis and Mr. Tatum—they shared the costs of
    his services in some manner.
    44
    Appellate Case: 19-3148    Document: 010110637191        Date Filed: 01/26/2022    Page: 45
    In light of the foregoing evidence, the district court easily could
    find—within the mold of the Guidelines commentary—that Mr. Ellis and Mr.
    Tatum had an “implicit agreement” during the relevant six-month period,
    reflecting the scope of their jointly undertaken criminal activity, to “cook crack
    cocaine” at 921 Haskell and to “sell crack cocaine from the residence.” Id., ¶
    325, at 109; see also U.S.S.G. § 1B1.3 cmt. 3(B).
    Furthermore, far from helping him, the illustration that Mr. Ellis highlights
    in the Guidelines commentary—specifically, in comment 4(C)(vi)—lends
    powerful support to the district court’s scope finding. In that illustration, Mr.
    Ellis is much more akin to Defendant Q—whom the Guidelines commentators
    would hold “accountable . . . for the quantities of drugs sold by . . . other dealers
    during the course of his joint undertaking,” than he is to Defendant P, who would
    escape this sort of attribution. U.S.S.G. § 1B1.3 cmt. 4(C)(vi).
    More specifically, Mr. Ellis’s connection to Mr. Tatum was not limited to
    simply knowing that they “share[d] a common source of supply” and sold “the
    same type of drug,” like Defendant P. Id. Rather, Mr. Ellis “pool[ed]” his
    resources with Mr. Tatum—which (among other things) allowed the two men to
    have a roof over their heads at 921 Haskell to sell drugs and the wherewithal to
    keep Theoplis working for their mutual benefit—making Mr. Ellis’s position
    much more akin to Defendant Q. Id.
    45
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022    Page: 46
    Accordingly, it would be quite plausible—indeed, eminently
    reasonable—for the district court to determine that these facts supported a finding
    that Mr. Ellis was engaged in a jointly undertaken criminal activity with Mr.
    Tatum during the critical six-month period to purchase cocaine and distribute
    crack at 921 Haskell. The upshot being that Mr. Ellis should be held
    “accountable” for the cocaine powder that Mr. Tatum purchased from Mr. Sykes
    during this period.
    In retort, Mr. Ellis asserts that “nothing about the Haskell house
    specifically pertains to the cocaine [Mr.] Tatum purchased from [Mr.] Sykes over
    the six-month period between October 2011 and April 2012.” Aplt.’s Opening Br.
    at 25. However, the district court could plausibly, as well as reasonably, find to
    the contrary. Mr. Tatum undisputedly distributed crack (i.e., cocaine base) from
    the 921 Haskell residence during this six-month period. And it is elementary that
    crack is made from cocaine powder—the substance Mr. Tatum purchased from
    Mr. Sykes during the same six-month period. Therefore, the district court could
    plausibly infer—with no contrary evidence apparent in the record—that at least
    some of the crack that Mr. Tatum trafficked at 921 Haskell was made with the
    cocaine that he purchased from Mr. Sykes. Furthermore, and perhaps more
    importantly, the district court’s finding regarding Mr. Ellis’s jointly undertaken
    46
    Appellate Case: 19-3148   Document: 010110637191       Date Filed: 01/26/2022   Page: 47
    criminal activity with Mr. Tatum during this six-month period did not depend
    solely on two men’s activities at 921 Haskell.
    Recall that the evidence showed that, during this period, on between ten to
    fifteen occasions, Mr. Ellis and Mr. Tatum traveled together to pick up powder
    cocaine from Mr. Sykes. And, as with their activities at 921 Haskell, both men
    plausibly could be found to have pooled their resources by employing Theoplis
    for their mutual benefit. Specifically, Theoplis assisted both men by, among other
    things, picking up and delivering drugs in settings other than 921 Haskell.
    Moreover, on at least one occasion, Mr. Ellis and Theoplis picked up cocaine on
    behalf of Mr. Tatum from Mr. Sykes. These activities evidenced a good deal of
    cooperation and coordination, which significantly fortified the foundation of the
    district court’s (adopted) finding that Mr. Tatum “worked in concert with Marvin
    Ellis and Theoplis Ellis, who would all work together to sell ‘crack’ cocaine to
    various street level customers.” See R., Vol. IV, ¶ 75, at 42–43.
    And, if these acts were not enough, the evidence showed that in early 2012,
    primarily in the months of February and March, the DEA conducted a series of
    controlled buys of crack cocaine, through the use of CIs, from Mr. Ellis and Mr.
    Tatum in locations outside of 921 Haskell. Notably, on three occasions, Mr. Ellis
    and Mr. Tatum were together when the drug transactions took place, and they
    shared the resource of Mr. Tatum’s vehicle in conducting two of these
    47
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022     Page: 48
    transactions. Indeed, in one of the drug deals, Mr. Ellis effectively acted as the
    go-between—shuttling between the CI’s vehicle and Mr. Tatum’s: Mr. Ellis
    entered the CI’s vehicle and obtained the money; took the money and delivered it
    to Mr. Tatum, whereupon he received the crack; and then he returned with the
    crack and handed it to the CI through the vehicle’s window. Significantly, even
    in a street sale that Mr. Ellis conducted on his own, he highlighted his joint
    venture with Mr. Tatum, when he “bragged about obtaining his crack cocaine
    from ‘Tater’”—Mr. Tatum’s nickname. Id., ¶ 83, at 44.
    Consequently, there was ample evidence relating to the two men’s drug-
    trafficking activities—both at and away from 921 Haskell—upon which the
    district court could have plausibly found that Mr. Ellis was engaged in jointly
    undertaken criminal activity with Mr. Tatum during the relevant six-month period
    to purchase powder cocaine and distribute crack. 9
    9
    During the sentencing hearing and on appeal, Mr. Ellis’s counsel
    argued that it does not naturally follow from Mr. Ellis and Mr. Tatum’s shared
    residence and drug-trafficking activities at 921 Haskell that the two men were
    engaged in a joint venture—reasoning that they just as well could have been
    acting independently of each other. In this regard, Mr. Ellis’s counsel has
    analogized the relationship between the two men to two lawyers that have an
    office-sharing arrangement, but nevertheless maintain separate and independent
    practices. In counsel’s hypothetical, the two lawyers “may have a common
    reception, they may split the bills,”—but at the end of the day, if one of the
    lawyers commits fraud, or does something that is not the other lawyer’s “stuff,”
    then the other lawyer should not be held accountable for that conduct. R., Vol.
    III, at 63–64. However, in making its finding of jointly undertaken criminal
    (continued...)
    48
    Appellate Case: 19-3148   Document: 010110637191       Date Filed: 01/26/2022     Page: 49
    To be sure, Mr. Ellis seeks to advance a contrary view of the
    evidence—under which Mr. Ellis and Mr. Tatum operated independently in their
    drug-trafficking activities and actually “were competitors.” Aplt.’s Opening Br.
    at 25. For example, Mr. Ellis attempts to undercut the notion that his ten to
    fifteen trips with Mr. Tatum to purchase cocaine from Mr. Sykes bespeak jointly
    undertaken criminal activity by arguing that the two men made separate cocaine
    purchases from Mr. Sykes on these trips. See id. at 5 (“[A]lthough [Mr.] Tatum
    and [Mr. Ellis] continued to arrive . . . together, they would make separate
    9
    (...continued)
    activity, the district court effectively rejected this analogy. And, on this record,
    we think that the court had a more than plausible basis for doing so. There is no
    suggestion in Mr. Ellis’s hypothetical that the two lawyers repeatedly assisted and
    coordinated with each other in their practices by, for example, repeatedly
    litigating cases together. Yet, the hallmark of the relationship of Mr. Ellis and
    Mr. Tatum was coordination and cooperation. In particular, Mr. Ellis repeatedly
    assisted Mr. Tatum with crack sales in the community. And, as we discuss infra,
    the two men plausibly could be found to have repeatedly provided mutual aid and
    protection to each other in traveling on ten to fifteen occasions together to
    purchase powder cocaine from Mr. Sykes. Furthermore, the reported reason that
    Mr. Ellis had a falling out with Mr. Tatum is that the latter was attempting to boss
    him around—a circumstance that one typically would not expect to find between
    two lawyers operating independent legal practices, but one that you might find, if
    the two lawyers were partners. All that said, even if Mr. Ellis’s lawyer
    hypothetical could be viewed as reflecting a plausible reading of the record—viz.,
    one indicating that Mr. Ellis and Mr. Tatum were “sometimes friendly” drug
    dealers sharing a residence at 921 Haskell, but nevertheless “engaged in separate,
    rival business operations,” Aplt.’s Opening Br. at 25—the district court’s contrary
    reading of the record constituted, at the very least, a plausible alternative. Under
    the deferential clear-error standard, that is enough to render this hypothetical
    unavailing. See, e.g., Torres, 
    53 F.3d at 1144
    .
    49
    Appellate Case: 19-3148     Document: 010110637191        Date Filed: 01/26/2022     Page: 50
    purchases from [Mr.] Sykes. . . .”); id. at 28 (noting the fact that Mr. Ellis and
    Mr. Tatum “made separate purchases of powder cocaine from [Mr.] Sykes at the
    same time is a critical fact the government has never dealt with”). However, even
    if that were true, it would not render implausible—or even unreasonable—the
    district court’s finding that Mr. Ellis and Mr. Tatum—along with
    Theoplis—“would all work together to sell ‘crack’ cocaine to various street level
    customers,” R., Vol. IV, ¶ 75, at 43, and, more specifically, that the two men
    “were involved in jointly undertaken criminal activity that included purchasing
    cocaine from Djuane Sykes and selling crack cocaine at various locations together
    in the community and from 921 Haskell Street,” id., ¶ 107, at 49.
    Indeed, congruent with Guidelines commentary—the district court would
    not have been unreasonable in finding support for its jointly undertaken criminal
    activity finding in the fact itself that the two men elected to “coordinate their . . .
    efforts” and, specifically, chose to travel together to make the cocaine purchases.
    See U.S.S.G. § 1B1.3 cmt. 4(C)(viii). From their coordination of their travel to
    Mr. Sykes, Mr. Ellis and Mr. Tatum plausibly could be deemed to have gained
    “mutual assistance and protection”—even if they ultimately made separate
    purchases from him. See id. (noting that individuals hired separately to smuggle
    marijuana “across the border from Mexico into the United States” could be
    deemed to have engaged in jointly undertaken criminal activity, where they
    50
    Appellate Case: 19-3148     Document: 010110637191      Date Filed: 01/26/2022       Page: 51
    “receive[d] their individual shipments from the supplier at the same time and
    coordinate[d] their importation efforts by walking across the border together for
    mutual assistance and protection”). As such, their coordinated conduct would
    support a plausible finding that they each should be held “accountable for the
    aggregate quantity” of cocaine that they purchased to further their crack
    distribution activities. Id.
    And lastly, in support of his contrary view of the evidence, Mr. Ellis points
    to the one transaction during the latter part of the six-month period in which Mr.
    Ellis arguably behaved more like a competitor than a collaborator with Mr.
    Tatum. Recall that in that incident, Mr. Ellis reportedly “told the [CI] to ‘not
    mess’ with [Mr.] Tatum anymore and to only contact him for drugs.” R., Vol. IV,
    ¶ 300, at 103. However, the existence of this single incident—which took place
    about one month before Mr. Ellis parted company with Mr. Tatum—is hardly
    inconsistent with the district court’s overall finding that Mr. Ellis and Mr. Tatum,
    during the six months at issue, banded “together to sell ‘crack’ cocaine to various
    street level customers.” Id., ¶ 75, at 43. Indeed, the incident does not even show
    that Mr. Ellis engaged in a side deal that was inconsistent with his jointly
    undertaken criminal activity with Mr. Tatum—only that he contemplated doing so
    in the future. Cf. United States v. Childress, 
    58 F.3d 693
    , 711 n.3 (D.C. Cir.
    1995) (“[T]he fact that certain conspirators engage in independent drug
    51
    Appellate Case: 19-3148    Document: 010110637191       Date Filed: 01/26/2022      Page: 52
    transactions does not on its own negate the existence of a single conspiracy.
    Though genuine side deals would not be attributable to the conspiracy charged in
    this case, neither would their existence prevent the jury from concluding that a
    core, single conspiracy was also in operation simultaneously.” (citation omitted)).
    At bottom, this one incident does not render implausible—or even
    unreasonable—the court’s ultimate finding that Mr. Ellis was engaged in jointly
    undertaken criminal activity with Mr. Tatum during the relevant six-month period.
    Therefore, for the foregoing reasons, we also reject Mr. Ellis’s second
    challenge. There was ample record evidence to support the district court’s
    finding that, during the six-month period from mid-October 2011 to mid-April
    2012, Mr. Ellis and Mr. Tatum were engaged in a jointly undertaken criminal
    activity to purchase powder cocaine and distribute crack (i.e., cocaine base).
    And, even if that were not so, under the deferential clear-error standard of review,
    we certainly could not conclude on this record that the court’s finding in this
    respect was implausible, and therefore the finding should be upheld.
    IV
    For these reasons, we AFFIRM the district court’s sentencing judgment.
    52