United States v. Watson ( 2014 )


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  •                                                                        FILED
    United States Court of Appeals
    Tenth Circuit
    September 11, 2014
    PUBLISH                   Elisabeth A. Shumaker
    Clerk of Court
    UNITED STATES COURT OF APPEALS
    TENTH CIRCUIT
    UNITED STATES OF AMERICA,
    Plaintiff-Appellee,
    v.                                                      No. 12-5104
    VINCENT BRET WATSON,
    Defendant-Appellant.
    Appeal from the United States District Court
    for the Northern District of Oklahoma
    (D.C. No. 4:11-CR-00166-CVE-2)
    J. Lance Hopkins, Tahlequah, OK, for Defendant-Appellant.
    Joel-lyn A. McCormick, Assistant United States Attorney (Danny C. Williams,
    Sr., United States Attorney, with her on the brief), Tulsa, OK, for Plaintiff-
    Appellee.
    Before HOLMES, MURPHY, and MATHESON, Circuit Judges.
    HOLMES, Circuit Judge.
    Defendant-Appellant Vincent Watson was convicted by a jury of five
    counts relating to the cultivation and distribution of marijuana. He raises three
    challenges to his conviction on appeal: (1) that his second counsel provided
    ineffective assistance by failing to adequately pursue, and communicate with him
    about, the possibility of entering into a plea agreement with the government; (2)
    that the district court violated his rights under the Speedy Trial Act (“STA” or
    “the Act”) by granting the government an ends-of-justice continuance following
    his co-defendant’s decision to plead guilty and cooperate with the government a
    week before trial was scheduled to begin; and (3) that the district court
    improperly admitted testimony regarding Mr. Watson’s previous cultivation and
    distribution of marijuana. For the reasons that follow, we reject all three of Mr.
    Watson’s claims and affirm his conviction.
    I
    Pursuant to a five-count indictment, Mr. Watson and his co-defendant,
    David Shuck, were charged with: one count of conspiring to manufacture
    marijuana in violation of 
    21 U.S.C. § 846
     (Count 1); one count of manufacturing
    100 or more marijuana plants in violation of 
    21 U.S.C. § 841
    (a)(1) (Count 2); two
    counts of using and maintaining a place for the purpose of manufacturing
    marijuana in violation of 
    21 U.S.C. § 856
    (a)(1) (Counts 3 and 4); and one count
    of possessing with the intent to distribute marijuana in violation of 
    21 U.S.C. § 841
    (a)(1) (Count 5). The conspiracy charged in Count 1 was alleged to have
    lasted from sometime in 2010 to approximately July 29, 2011. We set forth only
    the factual and procedural background relevant to each of Mr. Watson’s three
    2
    claims. 1
    Following Mr. Watson’s indictment and arrest, Assistant Federal Public
    Defender Stephen Greubel was appointed to represent him. Well before trial was
    scheduled to begin, Mr. Greubel met with the government on behalf of Mr.
    Watson to discuss the possibility of a plea agreement; the government offered to
    enter into a plea agreement with Mr. Watson. Under that agreement, Mr. Watson
    would be obliged to plead guilty to Count 3—a felony charge of using and
    maintaining a place for the purpose of manufacturing marijuana. In return, the
    government would, inter alia, dismiss all of the remaining charges in the
    indictment against Mr. Watson. Mr. Greubel relayed that offer to Mr. Watson and
    explained to him the consequences of pleading guilty. Mr. Watson rejected the
    offer, explaining to Mr. Greubel that he did not want a felony conviction on his
    record because that could result in the loss of his license to sell insurance.
    At the January 6, 2012, pretrial conference, both Mr. Watson and Mr.
    Shuck stated that they intended to go to trial. Three or four days later, however,
    Mr. Greubel was informed that Mr. Shuck intended to plead guilty and begin
    cooperating with the government. Sometime between January 9 and 11, due to
    1
    Mr. Watson has not challenged on appeal the sufficiency of the evidence to
    support his convictions. In crafting our background statement, “[w]e recite the facts in
    the light most favorable to the jury’s verdict,” United States v. Berry, 
    717 F.3d 823
    , 827
    (10th Cir.), cert. denied, --- U.S. ----, 
    134 S. Ct. 495
     (2013); accord Pratt v. Petelin, 
    733 F.3d 1006
    , 1009 (10th Cir. 2013), and also draw upon the district court’s unchallenged
    factual findings.
    3
    the changed circumstances, Mr. Greubel again contacted the government to see
    whether the opportunity for Mr. Watson to enter into a plea agreement was still
    available. The government informed Mr. Greubel that, other than the third base-
    offense-level point for acceptance of responsibility that was included in its first
    plea offer, the same plea deal previously offered remained available until the end
    of business on January 11.
    On January 11, Mr. Greubel met with Mr. Watson to relay the terms of the
    government’s second plea offer. Again, Mr. Watson stated that he was not
    interested in pleading guilty and that he wanted to go to trial. Moreover, Mr.
    Watson informed Mr. Greubel that he had retained counsel, W. Creekmore
    Wallace, II, to represent him at trial and that Mr. Greubel’s services were no
    longer needed. After the meeting, Mr. Greubel called Mr. Wallace and informed
    him of the government’s most recent plea offer and of Mr. Watson’s rejection of
    it. Mr. Wallace later acknowledged that he learned of the government’s second
    plea offer as well as Mr. Watson’s rejection of it, and indicated that he never
    personally discussed plea negotiations with Mr. Watson.
    The trial was set to begin on January 17, 2012. But, in light of Mr. Shuck’s
    recent change of plea and willingness to cooperate, the government moved to
    continue the trial pursuant to an ends-of-justice continuance under the STA, 
    18 U.S.C. § 3161
    (h)(7)(A). According to the government, debriefing sessions with
    Mr. Shuck on January 10 and 11 necessitated that it seek a continuance to further
    4
    investigate the information that he provided. Specifically, the government
    asserted that it required more time (1) to conduct additional debriefing sessions
    with Mr. Shuck, (2) to interview numerous individuals identified by Mr. Shuck
    that might be material witnesses, and (3) to obtain documents described by Mr.
    Shuck. Relying on the government’s three asserted bases, the district court
    granted its motion for an ends-of-justice continuance and continued the trial for
    thirty-five days, until February 21, 2012. 2
    2
    Mr. Watson asserts in his opening brief that the continuance granted by the
    district court allowed for “an additional 35 days,” from the initial trial date of January 17,
    2012 to the new trial date of February 21, 2012. Aplt. Opening Br. at 26. Mr. Watson
    does not explicitly identify the reasoning underlying his determination of the number of
    excludable days authorized by the court’s continuance order; presumably, Mr. Watson did
    not include either the first day (January 17) or the last day (February 21) in his
    excludable-days computation in arriving at the thirty-five-day figure. If he had added to
    the list of excludable days the first and last days, the number of excludable days would
    actually have been thirty-six, instead of thirty-five. It is not entirely clear from the
    language of the district court’s order how many days the court intended to designate as
    excludable. The order indicates that “the time between January 17, 2012 and February
    21, 2012 is excludable” under the ends-of-justice provision. R., Vol. I, at 43 (Order, filed
    Jan. 13, 2012) (emphasis added). Conceivably, this language could be read as not adding
    to the excludable-days tally the first and last days, which would make the number of
    excludable days thirty-four, instead of thirty-five. Controlling precedent offers little
    definitive guidance on discerning the import of this or similar language that district courts
    employ in orders granting ends-of-justice continuances. See United States v. Williams,
    
    511 F.3d 1044
    , 1056 n.12 (10th Cir. 2007) (“The courts appear not to have explicitly
    discussed this computation issue. When they have expressly noted the number of
    excludable days flowing from an ends-of-justice excludable period (e.g., from a given
    date “A” to date “Z”), the Supreme Court and our panels appear to have not counted as
    excludable the first day of the period.”).
    Thankfully, we need not delve into the minutiae of this computation question here
    and are content to use the thirty-five-day figure that Mr. Watson asserts for two reasons:
    (continued...)
    5
    Prior to the newly set trial date, the government filed notice under Federal
    Rule of Evidence 404(b) of its intent to offer evidence at trial regarding Mr.
    Watson’s past drug-related conduct. Specifically, the government intended to
    offer the testimony of two witnesses—Mr. Shuck and a then-unnamed
    witness—regarding Mr. Watson’s cultivation and distribution of marijuana in the
    mid-to-late 1990s through approximately the mid-2000s. After questioning Mr.
    Shuck outside of the presence of the jury and over Mr. Watson’s objection, the
    district court granted the motion as to Mr. Shuck, reasoning that such evidence
    was intrinsic to the crimes alleged and thus was not other-acts evidence subject to
    the strictures of Rule 404(b). Accordingly, at trial, the government offered Mr.
    Shuck’s testimony regarding his and Mr. Watson’s past marijuana cultivation and
    distribution.
    The government did not call the unnamed witness specified in its 404(b)
    notice to testify during its case-in-chief. After Mr. Watson took the witness stand
    in his own defense, however, the government did call that witness in rebuttal; the
    2
    (...continued)
    first and foremost, because whether the correct figure is thirty-five, thirty-six, or
    thirty-four has no material bearing on our substantive analysis and no party has suggested
    to the contrary; and, second, because the government does not contest Mr. Watson’s
    assertion that the district court’s January 2012 continuance order at issue allowed for an
    additional thirty-five days, thus leaving us no contested matter between the parties to
    resolve. To complete the picture, however, we also note that the district court
    subsequently granted a short additional continuance at the government’s request, but it is
    not challenged here. The trial actually commenced on February 27, 2012.
    6
    previously unnamed witness was Ms. Shelby Armbruster. Again, over Mr.
    Watson’s objection, the district court admitted her testimony, but for a different
    reason than it admitted Mr. Shuck’s—that is, instead of concluding that her
    testimony was intrinsic to the crimes charged, or even that it was admissible
    under Rule 404(b), the district court concluded that it was admissible to impeach
    Mr. Watson’s earlier testimony.
    In the end, the jury found Mr. Watson guilty on all five counts. A few
    weeks after trial, Mr. Watson sent a letter to the district court stating that he
    wanted a second chance at the government’s plea offer and that, for a variety of
    reasons, he had been unable to give it full and appropriate consideration at the
    time it was presented to him. Shortly thereafter, Mr. Wallace withdrew as Mr.
    Watson’s counsel and Lance Hopkins was appointed to represent Mr. Watson.
    Subsequently, Mr. Watson filed a motion to vacate the jury’s verdict and for a
    new trial on the grounds that Mr. Wallace provided ineffective assistance of
    counsel by failing to inform Mr. Watson of the risks of proceeding to trial and,
    relatedly, for failing to enter into plea negotiations with the government.
    The district court denied the motion, reasoning that Mr. Wallace did not
    provide deficient performance because, inter alia, Mr. Greubel adequately
    informed Mr. Watson of the consequences of proceeding to trial and the potential
    benefits of pleading guilty, and Mr. Wallace was aware that Mr. Watson had
    rejected the government’s two prior offers. Furthermore, the district court noted
    7
    that, even if Mr. Wallace’s performance was deficient, “it is doubtful” that Mr.
    Watson could establish that he was prejudiced by the deficient performance
    because “[t]here is no evidence . . . that there was a reasonable probability that
    [Mr. Watson] would have accepted the plea offer” had Mr. Wallace re-
    communicated it to him. R., Vol. I, at 235 (Op. & Order, filed May 18, 2012).
    II
    We turn first to Mr. Watson’s ineffective-assistance-of-counsel claim. 3 The
    primary thrust of Mr. Watson’s claim is that his second attorney, Mr. Wallace,
    provided ineffective assistance by failing to adequately discuss with him the
    government’s plea offers and the possible consequences of proceeding to trial.
    The Sixth Amendment provides defendants a right to the effective
    3
    Ineffective-assistance-of-counsel claims should ordinarily be brought in a
    collateral proceeding rather than on direct appeal. See United States v. Galloway, 
    56 F.3d 1239
    , 1242 (10th Cir. 1995) (en banc). This is because effective appellate review of such
    claims requires “[a] factual record [to] be developed in and addressed by the district court
    in the first instance.” 
    Id. at 1240
    . Therefore, ineffective-assistance claims brought on
    direct appeal are “presumptively dismissible, and virtually all will be dismissed.” 
    Id.
    “Nonetheless, this court has considered ineffective assistance of counsel claims on direct
    appeal in limited circumstances, but only where the issue was raised before and ruled
    upon by the district court and a sufficient factual record exists.” United States v. Flood,
    
    635 F.3d 1255
    , 1260 (10th Cir. 2011); see Galloway, 
    56 F.3d at
    1241–42. Here, Mr.
    Watson raised his ineffective-assistance claim in the district court, the district court held a
    hearing on the claim—during which it developed a full factual record—and subsequently
    ruled on the claim; accordingly, we may address it on direct appeal. See United States v.
    Rodriguez-Rivera, 
    518 F.3d 1208
    , 1216 (10th Cir. 2008) (reviewing an ineffective-
    assistance-of-counsel claim on direct appeal because the claim was “raised and ruled
    upon by the [d]istrict [c]ourt” and “the record [wa]s sufficiently developed for review”);
    United States v. Hamilton, 
    510 F.3d 1209
    , 1213 (10th Cir. 2007) (reviewing an
    ineffective-assistance-of-counsel claim because the district court addressed the claim and
    a full factual record was developed for review).
    8
    assistance of counsel, and this right “extends to the plea-bargaining process.”
    Lafler v. Cooper, --- U.S. ----, 
    132 S. Ct. 1376
    , 1384 (2012). Like other claims of
    ineffective assistance of counsel, ones made “in the plea bargain context are
    governed by the two-part test set forth in Strickland [v. Washington, 
    466 U.S. 668
    (1984)].” Missouri v. Frye, --- U.S. ----, 
    132 S. Ct. 1399
    , 1405 (2012). This test
    requires a defendant to demonstrate that counsel’s performance (1) was
    unconstitutionally deficient, and (2) resulted in prejudice. See Strickland, 
    466 U.S. at 687
    ; United States v. Flood, 
    713 F.3d 1281
    , 1286 (10th Cir.), cert. denied,
    --- U.S. ----, 
    134 S. Ct. 341
     (2013). “The performance prong of Strickland
    requires a defendant to show that counsel’s representation fell below an objective
    standard of reasonableness.” Lafler, 
    132 S. Ct. at 1384
     (quoting Hill v. Lockhart,
    
    474 U.S. 52
    , 57 (1985)) (internal quotation marks omitted). And to demonstrate
    prejudice, “a defendant must show that there is a reasonable probability that, but
    for counsel’s unprofessional errors, the result of the proceeding would have been
    different.” 
    Id.
     (quoting Strickland, 
    466 U.S. at 694
    ) (internal quotation marks
    omitted). More specifically, when a defendant’s claim is that counsel’s deficient
    performance caused him to reject a plea offer and proceed to trial, he must show
    that
    there is a reasonable probability that the plea offer would have
    been presented to the court (i.e., that the defendant would have
    accepted the plea and the prosecution would not have withdrawn
    it in light of intervening circumstances), that the court would
    have accepted its terms, and that the conviction or sentence, or
    9
    both, under the offer’s terms would have been less severe than
    under the judgment and sentence that in fact were imposed.
    Id. at 1385; see Frye, 
    132 S. Ct. at 1410
     (holding that, to demonstrate prejudice
    resulting from counsel’s deficient performance that caused a defendant to forgo a
    favorable plea offer, a defendant must show that “he would have accepted the
    offer to plead” and that “there is a reasonable probability neither the prosecution
    nor the trial court would have prevented the offer from being accepted or
    implemented”).
    “In evaluating an ineffective assistance of counsel claim, we ‘accept the
    district court’s underlying factual findings unless clearly erroneous,’ and ‘we
    review de novo whether counsel’s performance was legally deficient and whether
    any deficiencies prejudiced the defendant.’” Rodriguez-Rivera, 
    518 F.3d at 1216
    (quoting Anderson v. Att’y Gen. of Kan., 
    425 F.3d 853
    , 858 (10th Cir. 2005)).
    “Courts are free to address [Strickland’s] two prongs in any order, and failure
    under either is dispositive.” Byrd v. Workman, 
    645 F.3d 1159
    , 1168 (10th Cir.
    2011); see Strickland, 
    466 U.S. at 697
     (“[T]here is no reason for a court deciding
    an ineffective assistance claim to . . . address both components of the inquiry if
    the defendant makes an insufficient showing on one. In particular, a court need
    not determine whether counsel’s performance was deficient before examining the
    prejudice suffered by the defendant as a result of the alleged deficiencies.”). The
    district court concluded that Mr. Watson’s counsel, Mr. Wallace, did not provide
    10
    deficient performance, and that even if he had, it was unlikely that Mr. Watson
    could establish prejudice. We affirm solely on the latter ground—that is,
    assuming arguendo that Mr. Wallace’s performance was deficient, Mr. Watson
    failed to prove that he was prejudiced thereby.
    Mr. Watson directs nearly all of his efforts on appeal to establishing that
    his second counsel, Mr. Wallace, provided deficient performance by not
    contacting the government regarding the prior plea offers and subsequently
    communicating any plea offers to Mr. Watson, as well as by not adequately
    advising him of the potential consequences of proceeding to trial. Assuming
    without deciding that Mr. Wallace’s failure in these respects constituted deficient
    performance, Mr. Watson still bears the burden of proving prejudice—viz.,
    proving, inter alia, that, but for Mr. Wallace’s allegedly deficient performance,
    Mr. Watson would have accepted the government’s offer. See Frye, 
    132 S. Ct. at 1410
    ; Lafler, 
    132 S. Ct. at 1385
    .
    Mr. Watson cannot demonstrate prejudice because he does not point to any
    evidence that he would have accepted a plea offer had Mr. Wallace discussed it
    with him. Instead, he merely makes two unadorned assertions that there is a
    reasonable probability he would have pleaded guilty had Mr. Wallace done so.
    See Aplt. Opening Br. at 24 (“The undersigned counsel submits to the Court that a
    review of the record establishes that if Mr. Watson would have been properly
    advised [of the punishment he faced] and the substantial risk that he would have
    11
    been found guilty . . . by the jury, there is more than a reasonable probability that
    [Mr. Watson would have pleaded guilty].”); Aplt. Reply Br. at 6 (“If [Mr.]
    Wallace . . . had inquired about the offer by contacting the Assistant U.S.
    Attorney[] [and] informed [Mr.] Watson of the particulars of the offer and its
    benefits [to] him, . . . there is more than a reasonable probability that [Mr.
    Watson would have pleaded guilty].”).
    Thus, the most that can be said with respect to prejudice is that Mr. Watson
    asserts he was prejudiced; his mere self-serving statement, which does no more
    than open the door to conjecture, is not enough. Cf. Heard v. Addison, 
    728 F.3d 1170
    , 1184 (10th Cir. 2013) (“[W]e remain suspicious of bald, post hoc and
    unsupported statements that a defendant would have changed his plea absent
    counsel’s errors, and if the defendant can muster no other evidence of how he
    would have responded if he had received effective assistance of counsel, the
    inquiry will focus on the objective evidence.”). Mr. Watson must prove with
    evidence that there is a reasonable probability that, inter alia, he would have
    accepted the plea agreement had Mr. Wallace discussed it with him. See
    Strickland, 
    466 U.S. at 693
     (“[T]he defendant [must] affirmatively prove
    prejudice.” (emphasis added)); see also 
    id. at 695
     (“In making [the prejudice]
    determination, a court hearing an ineffectiveness claim must consider the totality
    of the evidence before the judge or jury.” (emphasis added)). This he has not
    done.
    12
    Mr. Watson also does not demonstrate prejudice for the additional reason
    that he did not provide evidence of the other showings required by Frye and
    Lafler—viz., that the plea offer, had he accepted it, “would have been adhered to
    by the prosecution and accepted by the trial court.” 4 Frye, 132 S. Ct. at 1411; see
    also Lafler, 
    132 S. Ct. at 1385
    . Mr. Watson does not even confront these
    possibilities, let alone provide arguments or evidence as to why these additional
    requirements are met.
    Mr. Watson’s failure to point to any evidence in support of prejudice
    provides a sufficient basis, standing alone, to reject his ineffective-assistance
    claim. However, we also note that our independent review of the record validates
    the district court’s conclusion that the record is devoid of evidence in support of
    Mr. Watson’s assertion of prejudice. Instead, the evidence at least arguably
    supports the opposite inference. The district court found that Mr. Greubel
    informed Mr. Watson of both plea offers as well as the consequences of pleading
    guilty and of proceeding to trial. Fully apprised of this information, Mr. Watson
    rejected both plea offers, and the second rejection occurred after Mr. Watson
    knew that Mr. Shuck was cooperating with the government. Furthermore, the
    district court found that Mr. Watson “repeatedly” told Mr. Greubel that he would
    4
    A defendant must also show “that the conviction or sentence, or both, under
    the offer’s terms would have been less severe than under the judgment and sentence that
    in fact were imposed.” Lafler, 132 S. Ct. at 1385. Mr. Watson failed to discuss this
    requirement as well.
    13
    not plead guilty to a felony because that would require the forfeiture of his
    insurance license. R., Vol. I, at 235. In short, the inference that might reasonably
    be drawn from this evidence is that under no circumstances did Mr. Watson
    intend to plead guilty—even though he knew his co-defendant was cooperating
    with the government—because he would have necessarily lost his insurance
    license. In other words, there is no evidence that, had Mr. Wallace re-discussed
    the plea offer with him, Mr. Watson would have changed his mind. Accordingly,
    even if Mr. Wallace’s failure in this regard amounted to deficient performance,
    we would be hard-pressed to conclude that Mr. Watson was prejudiced by it.
    Whether counseled by Mr. Wallace about the government’s plea offer or not, Mr.
    Watson would have made the same decision to reject a plea deal and proceed to
    trial; thus, any prejudice that Mr. Watson suffered by going to trial would not
    have been because of any alleged deficient performance by Mr. Wallace.
    However, lest our independent review of this evidence suggest to the
    contrary, let us underscore the point that is determinative here: Mr. Watson bears
    the burden of “affirmatively prov[ing]” that there is a reasonable probability that
    he would have accepted the plea had Mr. Wallace communicated the offer to him,
    Strickland, 
    466 U.S. at 693
    ; see also Frye, 
    132 S. Ct. at 1410
    ; Lafler, 
    132 S. Ct. at 1385
    , and this he has utterly failed to do. Were mere assertions that a
    defendant suffered prejudice sufficient, the prejudice prong of Strickland would
    be a formality, met in every case. Of course, it is not. Accordingly, Mr.
    14
    Watson’s ineffective-assistance-of-counsel claim must fail.
    III
    We turn next to Mr. Watson’s STA claim. He contends that the district
    court erred in granting the government an ends-of-justice continuance following
    Mr. Shuck’s decision to plead guilty and cooperate with the government.
    As a general matter, we “review the decision to grant an ends-of-justice
    continuance for abuse of discretion.” 5 United States v. Banks, --- F.3d ----, 
    2014 WL 3805481
    , at *4 (10th Cir.), pet. for cert. filed (U.S. Aug. 23, 2014) (No. 14-
    229); accord United States v. Gonzales, 
    137 F.3d 1431
    , 1433 (10th Cir. 1998).
    But “[w]hether discretion has been abused depends, of course, on the bounds of
    that discretion and the principles that guide its exercise.” United States v. Taylor,
    
    487 U.S. 326
    , 336 (1988). Because the STA sets forth detailed procedures for
    district courts to follow, appellate review of decisions made under the STA
    5
    At oral argument, the government suggested that we should review Mr.
    Watson’s STA claim only for plain error because he failed to specifically assert before the
    district court that an ends-of-justice continuance would violate his rights under the STA
    (as opposed to his constitutional right to a speedy trial). But, as the government conceded
    subsequently in the oral argument, it failed to raise this forfeiture argument in its
    appellate brief. “[T]he decision regarding what issues are appropriate to entertain on
    appeal in instances of lack of preservation is discretionary.” Abernathy v. Wandes, 
    713 F.3d 538
    , 552 (10th Cir. 2013), cert. denied, --- U.S. ----, 
    134 S. Ct. 1874
     (2014). “[A]
    colorable argument could be advanced that we should overlook Mr. [Watson’s] apparent
    failure to preserve his [STA claim] because the government forfeited the right to object to
    it.” United States v. McGehee, 
    672 F.3d 860
    , 873 n.5 (10th Cir. 2012). We need not
    continue this preservation inquiry—viz., our inquiry into whether it is appropriate to apply
    the plain-error standard on these facts—because, even applying the more generous abuse-
    of-discretion standard, we conclude that Mr. Watson cannot prevail on his STA
    challenge.
    15
    encompasses a review of whether the district court complied with those
    procedures. See id.; see also Zedner v. United States, 
    547 U.S. 489
    , 499 (2006)
    (“Th[e] [ends-of-justice] provision gives the district court discretion—within
    limits and subject to specific procedures—to accommodate limited delays for
    case-specific needs.”). Whether the district court complied with the Act’s
    procedures—that is, applied the appropriate legal standards—is an issue of law
    that we review de novo. See United States v. Thomas, 
    749 F.3d 1302
    , 1308 (10th
    Cir. 2014) (noting that we employ “de novo review regarding compliance with the
    Speedy Trial Act”); accord Williams, 
    511 F.3d at 1049
    ; Gonzales, 
    137 F.3d at 1433
    . “When the district court errs in deciding a legal issue, it necessarily abuses
    its discretion.” In re Cooper Tire & Rubber Co., 
    568 F.3d 1180
    , 1186 (10th Cir.
    2009) (quoting In re Qwest Commc’ns Int’l, Inc., 
    450 F.3d 1179
    , 1184 (10th Cir.
    2006)) (internal quotation marks omitted); accord United States v. Hasan, 
    609 F.3d 1121
    , 1127 (10th Cir. 2010). And we review any factual findings underlying
    a district court’s ends-of-justice decision for “clear error.” United States v.
    Spring, 
    80 F.3d 1450
    , 1456 (10th Cir. 1996); accord United States v. Clark, 
    717 F.3d 790
    , 822 (10th Cir. 2013), cert. denied, --- U.S. ----, 
    134 S. Ct. 903
     (2014).
    The STA generally requires that a defendant be brought to trial within
    seventy days of the filing of the indictment or information or the defendant’s
    initial appearance, whichever occurs later. See 
    18 U.S.C. § 3161
    (c)(1); Banks,
    
    2014 WL 3805481
    , at *5. Several periods of time, however, are excluded from
    16
    the seventy-day window. See 
    18 U.S.C. § 3161
    (h). One such exclusion is the
    ends-of-justice continuance, which covers “[a]ny period of delay resulting from a
    continuance granted by any judge . . . if the judge granted such continuance on
    the basis of his findings that the ends of justice served by taking such action
    outweigh the best interest of the public and the defendant in a speedy trial.”
    
    Id.
     § 3161(h)(7)(A). “Th[e] [ends-of-justice] exception to the otherwise precise
    requirements of the Act was meant to be a rarely used tool for those cases
    demanding more flexible treatment.” United States v. Toombs, 
    574 F.3d 1262
    ,
    1269 (10th Cir. 2009) (alterations in original) (quoting United States v. Doran,
    
    882 F.2d 1511
    , 1515 (10th Cir. 1989)) (internal quotation marks omitted); see
    Doran, 882 F.3d at 1515 (characterizing the ends-of-justice exclusion as a
    “narrow exception”).
    To grant an ends-of-justice continuance, the district court must “set[] forth,
    in the record of the case, . . . its reasons for finding that the ends of justice served
    by the granting of such continuance outweigh the best interests of the public and
    the defendant in a speedy trial,” 
    18 U.S.C. § 3161
    (h)(7)(A), and consider the four
    factors set forth in the STA, see 
    id.
     § 3161(h)(7)(B)(i)–(iv). 6 See Toombs, 574
    6
    Specifically, with respect to those four factors, the statute provides:
    (B) The factors, among others, which a judge shall consider in
    determining whether to grant a continuance under subparagraph (A) of
    this paragraph in any case are as follows:
    (continued...)
    17
    F.3d at 1268–69. Two important functions are served by requiring the district
    court to set forth in the record its reasons for granting a continuance: “[f]irst, it
    insures careful consideration of the relevant factors by the trial court,” and
    “[s]econd, the requirement provides the appellate court with an adequate record
    on which to review the district court’s decision.” Williams, 
    511 F.3d at 1057
    (quoting Doran, 882 F.2d at 1515) (internal quotation marks omitted); see
    6
    (...continued)
    (i) Whether the failure to grant such a continuance in the
    proceeding would be likely to make a continuation of such
    proceeding impossible, or result in a miscarriage of justice.
    (ii) Whether the case is so unusual or so complex, due to the
    number of defendants, the nature of the prosecution, or the
    existence of novel questions of fact or law, that it is
    unreasonable to expect adequate preparation for pretrial
    proceedings or for the trial itself within the time limits
    established by this section.
    (iii) Whether, in a case in which arrest precedes indictment,
    delay in the filing of the indictment is caused because the arrest
    occurs at a time such that it is unreasonable to expect return and
    filing of the indictment within the period specified in section
    3161(b), or because the facts upon which the grand jury must
    base its determination are unusual or complex.
    (iv) Whether the failure to grant such a continuance in a case
    which, taken as a whole, is not so unusual or so complex as to
    fall within clause (ii), would deny the defendant reasonable time
    to obtain counsel, would unreasonably deny the defendant or the
    Government continuity of counsel, or would deny counsel for
    the defendant or the attorney for the Government the reasonable
    time necessary for effective preparation, taking into account the
    exercise of due diligence.
    
    18 U.S.C. § 3161
    (h)(7)(B)(i)–(iv).
    18
    Toombs, 
    574 F.3d at 1269
    . “Failure to address [the reasons] on the record creates
    the unnecessary risk of granting continuances for the wrong purposes, and
    encourages overuse of this narrow exception.” Doran, 882 F.2d at 1515. We do
    not, however, “require district judges to address those factors that do not apply,”
    United States v. Occhipinti, 
    998 F.2d 791
    , 798 (10th Cir. 1993), nor “articulate
    facts which are obvious and set forth in the motion for the continuance itself,” 
    id. at 797
     (internal quotation marks omitted); accord United States v. Loughrin, 
    710 F.3d 1111
    , 1119 (10th Cir. 2013), aff’d, --- U.S. ----, 
    134 S. Ct. 2384
     (2014).
    Here, the district court began by setting forth the relevant STA provisions.
    In particular, the district court explicitly stated that the fourth factor under the
    Act required it to consider “whether the failure to grant such a continuance . . .
    would deny counsel for the defendant . . . the reasonable time necessary for
    effective preparation, taking into account the exercise of due diligence.” R., Vol.
    I, at 41–42 (omissions in original) (quoting 
    18 U.S.C. § 3161
    (h)(7)(B)(iv))
    (internal quotation marks omitted). Next, the district court noted the impetus for
    the government’s motion: on January 10, 2012, in the shadow of Messrs.
    Watson’s and Shuck’s January 17, 2012, trial date, Mr. Shuck decided to plead
    guilty and to begin cooperating with the government. The court further observed
    that, following debriefing sessions with Mr. Shuck on January 10 and 11, the
    government moved on January 12 for a thirty-day ends-of-justice continuance.
    The district court’s analysis then set forth the three justifications for an
    19
    ends-of-justice continuance offered by the government in light of Mr. Shuck’s
    decision to cooperate—namely, that the government needed additional time to:
    “(i) interview numerous individuals identified by [Mr. Shuck] to determine
    whether they [we]re material witnesses in this matter; (ii) conduct further
    debriefings with [Mr. Shuck]; and (iii) obtain documents described by [Mr.
    Shuck].” 
    Id. at 42
    . Based on these factors, the district court reasoned:
    Given the circumstances cited by counsel for the government, the
    Court finds that an ends of justice continuance is appropriate,
    despite defendant’s opposition. Counsel’s request for additional
    time to prepare for the trial [is] reasonable. It is in the interests
    of the public that the government be given an opportunity to
    investigate newly discovered information that relates to the
    prosecution of defendant. In addition to the interests of the
    public, the Court has considered the defendant’s interest in the
    speedy resolution of his criminal case and finds that a limited
    ends of justice continuance will not subvert defendant’s interest
    in the prompt prosecution of this matter.
    
    Id.
     The district court accordingly granted the government’s motion; it extended
    the continuance for slightly longer than the government had requested, scheduling
    the trial to commence thirty-five days after the stricken trial date of January 17,
    2012. 7
    7
    Mr. Watson does not argue in his opening brief that the district court erred
    in granting a continuance longer than the one requested by the government, so he has
    waived any possible argument to this effect. See, e.g., United States v. Yelloweagle, 
    643 F.3d 1275
    , 1280 (10th Cir. 2011). Although we therefore need not (and do not)
    definitively opine on the matter, such an argument might be a tough row to hoe in any
    event. Cf. Loughrin, 710 F.3d at 1123 (“While perhaps the government did not need the
    full two months by the time of the February 2 hearing—indeed, it originally requested
    only one month—the facts do not indicate that the district court acted arbitrarily or
    (continued...)
    20
    Mr. Watson’s primary argument is that the district court’s findings were
    insufficient to warrant an ends-of-justice continuance under the statute. 8 On
    several occasions, our court has addressed whether the findings in support of an
    ends-of-justice continuance were sufficient. We have found that perfunctory and
    conclusory orders granting continuances are insufficient. Three examples may
    illustrate this principle.
    In Toombs, we found the reasons supporting several ends-of-justice
    continuances inadequate where the “sole explanation contained in the record for
    each of the continuances [wa]s that discovery was recently disclosed and counsel
    consequently needed additional time to prepare for trial.” 
    574 F.3d at 1272
    . Nor
    was there any indication in Toombs—from the motions seeking continuances or
    from the district court’s orders granting them—that the district court had
    considered “the nature of the recently disclosed discovery, the relevance or
    importance of the discovery, or why . . . it [was] proper to grant an approximately
    two-month continuance.” Id.
    7
    (...continued)
    capriciously in excluding those days from the STA clock.”).
    8
    Specifically, Mr. Watson makes several arguments for the first time in his
    reply brief: that the government did not need additional time to conduct debriefings with
    Mr. Shuck or to find additional witnesses, that the continuance did not result in the
    government locating additional witnesses for its case-in-chief, and that the continuance
    was not proper under 
    18 U.S.C. § 3161
    (h)(7)(C). Because these arguments were not
    raised in Mr. Watson’s opening brief, they are waived. See, e.g., United States v. Benoit,
    
    713 F.3d 1
    , 12 n.2 (10th Cir. 2013); United States v. Bader, 
    678 F.3d 858
    , 894 (10th Cir.
    2012).
    21
    The district court’s findings in support of the ends-of-justice-continuance in
    Williams also were deficient. Specifically, we concluded in Williams that the
    reasons supporting all three ends-of-justice continuances were inadequate. See
    
    511 F.3d at
    1056–59. The district court’s first two orders did “not contain any
    findings,” while the third order, which did contain findings—thus presenting “a
    somewhat closer question”—was also deficient because the district court merely
    noted the presence of the defendant’s new counsel, who needed time to become
    familiar with the case. 
    Id. at 1057
    . “Although the district court . . . mentioned
    the presence of new counsel,” we observed, “it did not issue findings specifically
    addressing [the defendant’s] stated grounds for a continuance, . . . [n]or did the
    district court otherwise comment on the issue of trial preparation time . . . [nor]
    hint that it weighed the proper factors under the Act . . . [or even] cite the Act’s
    ends-of-justice provision.” 
    Id. at 1058
    . 9
    Finally, in Gonzales, we again concluded that the district court’s ends-of-
    justice findings were inadequate. See 
    137 F.3d at
    1434–35. There, the district
    court granted a continuance following representations by the government that the
    9
    Indeed, Williams is part of our long line of cases rejecting the grant of an
    ends-of-justice continuance where the district court failed to make any specific ends-of-
    justice findings. See, e.g., United States v. Saltzman, 
    984 F.2d 1087
    , 1090–91 (10th Cir.
    1993) (holding that the ends-of-justice continuances were inappropriate because no ends-
    of-justice findings were made); Doran, 882 F.2d at 1515 (holding that the ends-of-justice
    continuance was inappropriate because, although “[t]he record . . . [wa]s replete with
    discussions regarding why the case against [the defendant] could not proceed,” it was
    “devoid . . . of specific findings regarding the need or justification for significant
    delays”).
    22
    prosecuting attorney would be out of town shortly before the scheduled trial date,
    making preparation difficult, and that the following week, too, would be
    problematic because three witnesses would be out of town. See id. at 1434. The
    district court granted an ends-of-justice continuance, concluding that “the
    interests of justice outweigh the interest of the public and the defendant in a
    speedy trial . . . based upon the finding that counsel for the United States would
    be denied the reasonable and necessary time to prepare for trial.” Id.
    We held in Gonzales that such truncated findings were insufficient to
    justify the ends-of-justice continuance on several bases: first, the district court
    failed to consider the nature and the complexity of the case, as required under the
    STA; second, “there was a complete lack of inquiry concerning whether the
    prosecutor’s absence justified a continuance on continuity of counsel grounds
    under § [3161(h)(7)(B)(iv)] or whether the case could be tried adequately by other
    government counsel”; and third, “there was no discussion concerning how much
    time the prosecutor actually needed to prepare for trial and no discussion of what
    preparations he had already made.” Id. at 1434–35. “Without this information,”
    we concluded,
    we fail to see how the district court adequately could have
    determined whether denial of a continuance would have deprived
    the prosecutor of “reasonable time necessary for effective
    preparation,” 18 U.S.C. § [3161(h)(7)(B)(iv)], let alone whether
    the purported reasons for granting the continuance outweighed
    the best interests of the public and Gonzales in a speedy trial.
    23
    Id. at 1435.
    Taken together, our precedents require “the record, which includes the oral
    and written statements of both the district court and the moving party, [to] contain
    an explanation of why the mere occurrence of the event identified by the party as
    necessitating the continuance results in the need for additional time.” Toombs,
    
    574 F.3d at 1271
    . “Simply identifying an event, and adding the conclusory
    statement that the event requires more time for counsel to prepare, is not enough.”
    
    Id.
     at 1271–72. That being said, lengthy explanations are not required. See
    Occhipinti, 
    998 F.2d at
    797–98.
    The district court’s findings in this case, although not expansive, go
    sufficiently beyond those in Toombs, Williams, and Gonzales. 10 As detailed
    10
    Further supporting the adequacy of the district court’s findings is our
    holding in Occhipinti. There, the government sought an ends-of-justice continuance
    based on three upcoming and conflicting trial dates. See Occhipinti, 
    998 F.2d at 797
    .
    The district court “found that a continuance was necessary to allow the government
    sufficient time to prepare and stated in its written order that . . . the ends of justice served
    by the granting of such continuance outweigh the best interest of the public and the
    defendant in a speedy trial.” 
    Id.
     at 797–98 (internal quotation marks omitted). Our
    conclusion that these relatively sparse findings were sufficient was rooted in two
    justifications, both of which can equally be said about the district court’s findings here:
    “[f]irst, the court found specifically that granting the continuance struck the proper
    balance between the ends of justice and the best interest of the public and the defendants
    in a speedy trial,” and “[s]econd, the court articulated as the basis for that conclusion its
    belief that a continuance was necessary to allow the government sufficient time to prepare
    for trial.” 
    Id. at 798
    .
    To be sure, we recognized that the district court’s findings in Occhipinti were not
    optimal. See 
    id.
     (“Although a more thorough and explicit articulation might have better
    facilitated our review of the district court’s decision, the order did list the reasons
    (continued...)
    24
    above, the district court began by setting forth the relevant STA provisions, citing
    the fourth factor as relevant to its decision. It was not required to explicitly
    discuss the other factors if they were inapplicable. See Occhipinti, 
    998 F.2d at 798
    . Further, the district court’s findings made clear that the event necessitating
    the government’s request for a continuance—Mr. Shuck’s decision to cooperate
    with the government—occurred one week before the scheduled trial date. In light
    of this limited amount of time, the district court found that the three specific
    justifications for a continuance set forth by the government—interviewing
    potential material witnesses, conducting further debriefings with Mr. Shuck, and
    obtaining documents described by Mr. Shuck—were sufficient to justify a
    continuance under the statute. 11 Indeed, the district court specifically performed
    10
    (...continued)
    supporting the finding.”). However, we have nevertheless declined to eschew the
    reasoning in Occhipinti that upheld those findings. For example, we have since noted
    that, “although not optimally detailed,” those findings in Occhipinti were sufficient
    because “the government’s listing of the dates for each of the three other trials and their
    expected durations provided an explanation . . . of why these events, the trials, would
    require additional time for the government to prepare for the upcoming trial.” Toombs,
    
    574 F.3d at 1272
    . The same can certainly be said for the instant case, as the
    government’s three reasons, adopted by the district court, in conjunction with a trial date
    only seven days away, provided an adequate explanation for why the government needed
    additional time to prepare.
    11
    To the extent that Mr. Watson attempts to undercut the veracity of one of
    the government’s three asserted justifications—the interviewing of potential material
    witnesses—his attempt to do so is off the mark. Specifically, he focuses on
    § 3161(h)(3)(A), which permits the exclusion from the seventy allotted days of “[a]ny
    period of delay resulting from the absence or unavailability of the defendant or an
    essential witness,” and argues that Mr. Shuck was available and Ms. Armbruster was not
    (continued...)
    25
    the balancing required by § 3161(h)(7)(A), noting that “[i]t is in the interests of
    the public that the government be given an opportunity to investigate newly
    discovered information” and that a “limited ends of justice continuance will not
    subvert defendant’s interest in the prompt prosecution of this matter.” R., Vol. I,
    at 42.
    More to the point, the specific deficiencies that we found determinative in
    Toombs, Williams, and Gonzales are simply not present here. Unlike in Toombs,
    the district court here considered “the nature of the recently disclosed discovery[]
    [and] the relevance or importance of the discovery,” and it set forth “why [it]
    thought it proper to grant a[] . . . continuance.” 
    574 F.3d at 1272
    . Unlike in
    Williams, the district court here did not simply recognize the triggering event and
    grant a continuance; rather, it set forth in detail its obligations under the Act’s
    ends-of-justice provision, it made specific findings regarding the government’s
    asserted justifications, and it “weighed the proper factors under the Act.” 
    511 F.3d at 1058
    . And finally, unlike in Gonzales, the district court here had the
    information necessary to evaluate whether the “denial of a continuance would
    have deprived the prosecutor of reasonable time necessary for effective
    11
    (...continued)
    an essential witness. But the district court did not rely on § 3161(h)(3)(A) to exclude the
    thirty-five days at issue, and instead excluded the days via an ends-of-justice continuance
    granted pursuant to § 3161(h)(7)(A)—i.e., an entirely distinct statutory basis for
    excluding the days. Therefore, Mr. Watson’s arguments regarding the availability of Mr.
    Shuck and whether Ms. Armbruster was an essential witness are irrelevant to our inquiry.
    26
    preparation,” 
    137 F.3d at 1435
     (internal quotation marks omitted), because the
    court understood that the new information was first acquired only a week before
    trial, and it explicitly noted the specific tasks that engendered the government’s
    need for additional time, see also Loughrin, 710 F.3d at 1123 (in distinguishing
    Gonzales, noting that “the record here is not nearly as sparse as that in
    Gonzales”).
    To be sure, failing to find support in the particulars of our precedents, Mr.
    Watson urges us to consider the broader implications of allowing ends-of-justice
    continuances in cases such as this; he points out that such a “liberal” use of the
    ends-of-justice provision does not comport with our description of the exception
    as one rarely to be used. Aplt. Opening Br. at 28. More specifically, he contends
    that in multi-defendant cases such as this, defendants frequently decide to plead
    guilty and cooperate with the government close to trial, and if an ends-of-justice
    continuance would be warranted every time this occurred, trials could be extended
    for years, contrary to the goals of the Act and the purposes of the ends-of-justice
    provision. Given that we have consistently recognized that an ends-of-justice
    continuance is “to be a rarely used tool,” Toombs, 
    574 F.3d at 1269
     (quoting
    Doran, 882 F.2d at 1515) (internal quotation marks omitted); see also Williams,
    
    511 F.3d at 1049
     (“[E]nds-of-justice continuances should not be granted
    cavalierly.”), we cannot say that Mr. Watson’s argument is not worthy of serious
    consideration.
    27
    However, Mr. Watson’s argument bears no relationship to the facts of this
    case; in other words, his argument positing a situation where trial judges
    reflexively grant continuances in multi-defendant cases and consequently
    engender long delays does nothing more than erect a conjectural bogeyman
    that—on these facts—cannot frighten a reasonable jurist. As noted, the district
    court here considered the proper factors and sufficiently set forth its reasoning in
    granting the government a continuance. Further, in performing the required
    balancing, the district court appropriately considered in its calculus the relatively
    short duration of the requested continuance and found that Mr. Watson’s interest
    in the speedy resolution of this case would not be overly burdened by a “limited
    ends of justice continuance” of thirty-five days. R., Vol. I, at 42 (emphasis
    added).
    Mr. Watson does not contend that any of the district court’s factual findings
    were clearly erroneous. And, under abuse-of-discretion review, “when the
    statutory factors are properly considered, and supporting factual findings are not
    clearly in error, the district court’s judgment of how opposing considerations
    balance should not lightly be disturbed.” Taylor, 
    487 U.S. at 337
    . In this light,
    we discern no basis to disturb the balance struck by the district court here. Our
    decision to uphold the district court’s analysis should not—and cannot—be read
    as endorsing the routine granting of ends-of-justice continuances when defendants
    in multi-defendant cases decide to cooperate with the government close to trial.
    28
    We simply hold that under the circumstances of this case, the district court did
    not err in granting the ends-of-justice continuance, and Mr. Watson’s rights under
    the STA were not violated.
    IV
    Mr. Watson’s third and final claim is that the district court erred in
    admitting the testimony of (1) Mr. Shuck regarding Messrs. Watson’s and Shuck’s
    alleged marijuana-related conduct during the mid-to-late 1990s and during the
    mid-2000s, and (2) Ms. Armbruster regarding Mr. Watson’s alleged marijuana
    distribution from 1994 or 1995 through 2000 or 2001, because it all was
    inadmissible other-acts evidence under Federal Rule of Evidence 404(b). The
    district court admitted the challenged testimony over Mr. Watson’s objection. We
    review the district court’s evidentiary decisions for an abuse of discretion, “which
    means we will not disturb [its] ruling absent a distinct showing it was based on a
    clearly erroneous finding of fact or an erroneous conclusion of law or manifests a
    clear error of judgment.” United States v. Batton, 
    602 F.3d 1191
    , 1196 (10th Cir.
    2010) (quoting United States v. Stiger, 
    413 F.3d 1185
    , 1194 (10th Cir. 2005))
    (internal quotation marks omitted); see also United States v. Commanche, 
    577 F.3d 1261
    , 1266 (10th Cir. 2009) (“We review the district court’s decision to
    admit evidence under 404(b) for abuse of discretion.”). We address Mr. Shuck’s
    and Ms. Armbruster’s testimony in turn.
    29
    A
    1
    We begin with Mr. Shuck’s testimony. At trial, Mr. Shuck testified that he
    and Mr. Watson grew marijuana together outdoors from approximately 1995 to
    1999 on land Mr. Watson owned with his brothers. Although they discontinued
    their outdoor grow in 1999, according to Mr. Shuck, they resumed growing
    marijuana together in 2005 inside a trailer situated on land owned by Mr. Watson.
    The crimes charged in the instant case resulted from the indoor grow that began in
    2005. Mr. Watson challenges the admissibility of Mr. Shuck’s testimony
    regarding their prior outdoor growing activity.
    Rule 404(b) sets forth both the prohibited and (in non-exhaustive terms) the
    permitted uses for evidence of “crimes, wrongs, or other acts.” Fed. R. Evid.
    404(b) (capitalization altered). Such evidence is not admissible “to prove a
    person’s character in order to show that on a particular occasion the person acted
    in accordance with the character,” but is admissible if offered “for another
    purpose, such as proving motive, opportunity, intent, preparation, plan,
    knowledge, identity, absence of mistake, or lack of accident.” 
    Id.
     (emphasis
    added). “Rule 404(b) is considered to be an inclusive rule, admitting all evidence
    of other crimes or acts except that which tends to prove only criminal
    disposition.” United States v. Burgess, 
    576 F.3d 1078
    , 1098 (10th Cir. 2009)
    (quoting United States v. Tan, 
    254 F.3d 1204
    , 1208 (10th Cir. 2001)) (internal
    30
    quotation marks omitted); see also United States v. Parker, 
    553 F.3d 1309
    , 1314
    (10th Cir. 2009) (“The standard for satisfying Rule 404(b) admissibility is
    permissive . . . .”); United States v. Segien, 
    114 F.3d 1014
    , 1022 (10th Cir. 1997)
    (“[R]ule [404(b)] is one of inclusion, rather than exclusion . . . .”), overruled on
    other grounds as recognized in United States v. Hathaway, 
    318 F.3d 1001
    , 1006
    (10th Cir. 2003).
    But other-acts evidence need not meet the requirements of Rule 404(b) in
    every case: if the other-acts evidence is intrinsic to the charged crime—that is,
    “inextricably intertwined” with the evidence of the charged crime—it is
    admissible without regard to Rule 404(b)’s prohibitions. See United States v.
    O’Brien, 
    131 F.3d 1428
    , 1432 (10th Cir. 1997) (internal quotation marks
    omitted); see also United States v. Lambert, 
    995 F.2d 1006
    , 1007 (10th Cir. 1993)
    (“Other act evidence is intrinsic when the evidence of the other act and the
    evidence of the crime charged are inextricably intertwined or both acts are part of
    a single criminal episode or the other acts were necessary preliminaries to the
    crime charged.” (quoting United States v. Williams, 
    900 F.2d 823
    , 825 (5th Cir.
    1990)) (internal quotation marks omitted)).
    2
    The government filed a notice asserting its intention to introduce Mr.
    Shuck’s testimony for permissible purposes under Rule 404(b). See generally
    Fed. R. Evid. 404(b)(2)(A) (providing for such government notice to the defense).
    31
    The district court decided that Mr. Shuck’s testimony was admissible. However,
    it declined to rely on Rule 404(b); rather, the court concluded that Mr. Shuck’s
    testimony was inextricably intertwined with the evidence of the crimes charged,
    and thus Rule 404(b) did not apply. Yet, we have discretion nevertheless to
    affirm on any ground adequately supported by the record, and we exercise that
    discretion here. See United States v. Damato, 
    672 F.3d 832
    , 844 (10th Cir. 2012).
    Even assuming arguendo that the district court erred in concluding that Mr.
    Shuck’s testimony regarding the outdoor grow was intrinsic to the crimes
    charged, we hold that the evidence was nevertheless admissible under Rule
    404(b). 12
    “To determine whether Rule 404(b) evidence was properly admitted we
    look to the four-part test set out by the Supreme Court in Huddleston v. United
    12
    In exercising our discretion to affirm on an alternative ground, we consider
    three factors: “whether the ground was fully briefed and argued here and below, whether
    the parties have had a fair opportunity to develop the factual record, and whether, in light
    of . . . [the] uncontested facts, our decision would involve only questions of law.” Harvey
    v. United States, 
    685 F.3d 939
    , 950 n.5 (10th Cir. 2012) (alteration in original) (omission
    in original) (quoting Elkins v. Comfort, 
    392 F.3d 1159
    , 1162 (10th Cir. 2004)) (internal
    quotation marks omitted). Here, all of these considerations militate in favor of affirming
    on the alternative ground of Rule 404(b). Not only was the Rule 404(b) admissibility
    question argued below, but Mr. Watson’s briefing on appeal gives the question equal
    treatment with the threshold issue of whether the evidence was intrinsic to the crimes
    charged. Further, the record was fully developed during the course of Mr. Watson’s jury
    trial. And Mr. Watson is not challenging any of the district court’s factual findings,
    leaving for our resolution solely an issue of law. Accordingly, it is unquestionably proper
    for us to exercise our discretion to affirm on this alternative ground. See 
    id.
     (affirming on
    an alterative ground when all three of the relevant factors were met); Damato, 
    672 F.3d at 844
     (affirming on an alternative ground when only two of the three relevant factors were
    met).
    32
    States[, 
    485 U.S. 681
     (1988)].” United States v. Zamora, 
    222 F.3d 756
    , 762 (10th
    Cir. 2000). To be admissible, this test requires that those factors—often called
    the “Huddleston factors”—be satisfied:
    (1) the evidence was offered for a proper purpose under [Rule]
    404(b); (2) the evidence was relevant under [Rule] 401; (3) the
    probative value of the evidence was not substantially outweighed
    by its potential for unfair prejudice under [Rule] 403; and (4) the
    district court, upon request, instructed the jury pursuant to [Rule]
    105 to consider the evidence only for the purpose for which it
    was admitted.
    United States v. Becker, 
    230 F.3d 1224
    , 1232 (10th Cir. 2000); accord United
    States v. Smalls, 
    752 F.3d 1227
    , 1237 (10th Cir. 2014); United States v. Farr, 
    701 F.3d 1274
    , 1280 (10th Cir. 2012); see also Huddleston, 
    485 U.S. at
    691–92.
    Mr. Watson challenges the admissibility of Mr. Shuck’s testimony on three
    bases, arguing that: (1) the evidence is nothing more than impermissible character
    evidence offered to prove that he acted in conformity therewith and, thus, it does
    not fall within any of the permitted uses for other-acts evidence set forth in Rule
    404(b)(2); (2) the other-acts evidence lacked relevance because the alleged events
    occurred over a decade before the crimes charged; and (3) the district court erred
    in its Rule 403 balancing when it concluded that the probative value of the other-
    acts evidence was not substantially outweighed by the prejudice flowing
    therefrom. In short, Mr. Watson contends that none of the first three Huddleston
    factors are met in this case. (He does not contest the fourth Huddleston factor.)
    We address each of the three challenged factors in turn, ultimately concluding
    33
    that each is met.
    a
    The first Huddleston factor requires us to assess whether the challenged
    testimony was offered for a proper purpose under Rule 404(b). See Farr, 701
    F.3d at 1280; Becker, 
    230 F.3d at 1232
    . Although the district court admitted the
    evidence as intrinsic, and thus not subject to Rule 404(b), the government also
    maintained that the evidence was admissible under Rule 404(b) to prove, inter
    alia, Mr. Watson’s knowledge and intent. We agree that Mr. Shuck’s testimony
    was admissible for at least these two proper purposes under Rule 404(b)—namely,
    to prove Mr. Watson’s knowledge and intent to join the charged conspiracy with
    Mr. Shuck to manufacture marijuana, to use and maintain a place for the purpose
    of marijuana manufacturing, and to possess marijuana with the intent to distribute
    it. 13
    13
    By focusing solely on the other-acts evidence’s permitted uses to establish
    Mr. Watson’s knowledge and intent, we do not mean to suggest that the evidence would
    not be admissible for other reasons consistent with Rule 404(b). We choose to focus on
    knowledge and intent, however, because all of the crimes with which Mr. Watson was
    charged require a showing of at least one of these two categories of criminal intent, and
    because such other-acts evidence is frequently offered to prove both knowledge and intent
    in drug cases such as this, given that the two concepts are related. See, e.g., United States
    v. Russell, 
    109 F.3d 1503
    , 1507 (10th Cir. 1997) (White, J., sitting by designation)
    (holding that “evidence of prior drug transactions was admissible, under [Rule] 404(b), to
    show,” inter alia, “intent to enter into the drug conspiracy[] [and] knowledge of the
    conspiracy”); see also 2 Jack B. Weinstein & Margaret A. Berger, Weinstein’s Federal
    Evidence § 404.22[2], at 404-114.8 to 404-114.11 (Joseph M. McLaughlin ed., 2d ed.
    2014) [hereinafter “Weinstein’s”] (“[T]he hypothesis justifying the admission of other-
    acts evidence [to prove knowledge] is similar to that invoked with intent . . . .”).
    34
    Our court has time and again held that past drug-related activity is
    admissible other-acts evidence under Rule 404(b) to prove, inter alia, that the
    defendant had the knowledge or intent necessary to commit the crimes charged.
    See, e.g., United States v. Brooks, 
    736 F.3d 921
    , 940 (10th Cir. 2013)
    (“[Defendant’s] past associations and conduct with the [narcotics] conspiracy
    members were admissible to show his intent to join the conspiracy and the basis
    of the relationships between them.”), cert. denied by --- U.S. ----, 
    134 S. Ct. 2157
    (2014), and --- U.S. ----, 
    134 S. Ct. 1526
     (2014); United States v. Esquivel-Rios,
    
    725 F.3d 1231
    , 1240 (10th Cir. 2013) (concluding that we were “unable to fault”
    the district court’s determination that “the evidence of [the defendant’s] prior
    drug deals [was] relevant and admissible for a proper purpose—to show his
    knowledge of the drugs’ presence and his intent to distribute them”); United
    States v. Cherry, 
    433 F.3d 698
    , 701 (10th Cir. 2005) (“This Court has repeatedly
    held that evidence of past crimes is admissible to establish specific intent,
    including intent to distribute in a drug trafficking offense.”); Becker, 
    230 F.3d at 1232
     (“We find the first [Huddleston] factor . . . satisfied because the evidence
    was introduced for the proper purpose of using ‘prior drug involvement to show
    plan, motive or intent in a drug trafficking offense.’” (quoting United States v.
    Sturmoski, 
    971 F.2d 452
    , 459 (10th Cir. 1992))); United States v. Ramirez, 
    63 F.3d 937
    , 943 (10th Cir. 1995) (“This court has repeatedly held that ‘the use of
    prior drug involvement to show plan, motive or intent in a drug trafficking
    35
    offense is appropriate.’” (quoting Sturmoksi, 
    971 F.2d at 459
    )); United States v.
    Record, 
    873 F.2d 1363
    , 1375 (10th Cir. 1989) (affirming the district court’s
    decision to admit Rule 404(b) evidence of a past instance wherein the defendant
    imported marijuana, reasoning that “[w]e have previously recognized the
    probative value of uncharged acts evidence to demonstrate motive, intent,
    knowledge, or plan in the context of a conspiracy prosecution” and collecting
    cases). The other-acts testimony of Mr. Shuck comfortably fits within these
    precedents.
    Our decision in United States v. Wacker, 
    72 F.3d 1453
     (10th Cir. 1995),
    aptly illustrates why this is the case. There, several defendants were charged
    with, inter alia, possession with the intent to distribute marijuana following the
    discovery of their alleged marijuana growing operation. See 
    id. at 1460
    . The
    government sought to introduce the testimony of multiple witnesses who had
    previously purchased marijuana from one of the defendants and the testimony of
    another witness that two of the defendants had been involved in marijuana
    processing several years ago. See 
    id. at 1468
    . At trial, two of the defendants
    disavowed having the requisite criminal intent to join the drug conspiracy and
    maintained that they did not have any ownership or control over the marijuana at
    issue. See 
    id. at 1469
    . We held that testimony regarding their past uncharged
    acts “was properly admitted to show [the defendants’] intent and plan.” 
    Id.
    As in Wacker, Mr. Watson’s knowledge and intent were contested at trial.
    36
    Indeed, after Mr. Shuck’s testimony, Mr. Watson took the stand and put at issue
    whether he had the requisite knowledge and intent to commit the crimes charged;
    specifically, he testified that he had never grown marijuana with Mr. Shuck, had
    never sold or distributed marijuana, and was unaware that Mr. Shuck was growing
    marijuana in the trailer located on his land, despite having visited the trailer on
    multiple occasions. 14
    The challenged testimony regarding Mr. Watson’s previous outdoor
    marijuana grow with Mr. Shuck was thus admissible to prove that Mr. Watson had
    engaged in the charged crimes with the requisite knowledge and intent. Put
    differently, the evidence of Mr. Watson’s prior outdoor growing activity with Mr.
    Shuck served to prove that Mr. Watson knew that Mr. Shuck was growing
    marijuana for distribution in the trailer on his land and that he intended to
    participate in that enterprise with Mr. Watson, as he had previously done. 15 See
    14
    We mention Mr. Watson’s testimony on the matters here only to firmly
    underscore the point that knowledge and intent were at issue. When the court decided to
    admit Mr. Shuck’s testimony, there would not have been any certainty, of course, that Mr.
    Watson would testify and dispute these elements. However, on appeal, Mr. Watson does
    not contest that knowledge and intent were at issue. Moreover, even if he had, it is clear
    that they were at issue because the government had to prove them to obtain a guilty
    verdict and Mr. Watson at no time conceded at trial that they were met. Whether these
    elements were at issue is important because, had they not been, any Rule 404(b) evidence
    offered to prove their presence would not have been relevant. See Cherry, 
    433 F.3d at 701
     (holding that the Rule 404(b) evidence admitted to prove intent was “clearly
    relevant” because intent was “at issue in the trial”).
    15
    Mr. Watson’s heavy reliance on United States v. Sullivan, 
    919 F.2d 1403
    (10th Cir. 1990), is misplaced. In Sullivan, the government introduced testimony
    (continued...)
    37
    Cherry, 
    433 F.3d at
    700–01 (holding that a prior conviction for using a
    communications device to facilitate the distribution of cocaine was admissible
    under Rule 404(b) to prove that the defendant had the requisite intent to distribute
    cocaine); Ramirez, 
    63 F.3d at 943
     (holding that testimony that the defendant was
    previously arrested for possession with the intent to distribute cocaine was
    admissible under Rule 404(b) to prove that he had the requisite intent to distribute
    cocaine); see also Weinstein’s, supra, § 404.22[1][a], at 404-91 to 404-93 (“The
    requisite intent may be inferred from the fact that, after being involved in a
    number of similar incidents, the defendant must have had a mental state that is
    inconsistent with innocence.”); Weinstein’s, supra, § 404.22[2], at 404-114.8 to
    404-114.11 (“[T]he hypothesis justifying the admission of other-acts evidence [to
    prove knowledge] is similar to that invoked with intent . . . .”). In sum, the first
    Huddleston factor is satisfied here: Mr. Shuck’s testimony was admissible for
    15
    (...continued)
    regarding the defendant’s past drug-manufacturing activities—the “Mississippi
    cook”—arguing that the evidence was “part of the history of the conspiracy.” Id. at 1413
    (internal quotation marks omitted). We held that the district court erred in admitting the
    evidence because “the prosecutor made no effort to explain a probative purpose or
    connection of the earlier conduct in Mississippi to this case” and, further, because “[s]uch
    a general assertion as a basis for introducing evidence of prior wrongs or conduct is not
    sufficient for purposes of Rules 403 or 404(b).” Id. at 1416. This case is readily
    distinguishable from Sullivan; here, the government explained the purposes for which the
    evidence was offered (e.g., knowledge and intent) and, as discussed in detail infra, the
    other-acts evidence offered is clearly relevant to the crimes charged. Cf. United States v.
    Maass, 
    153 F.3d 729
    , 
    1998 WL 458577
    , at *2 (10th Cir. 1998) (unpublished)
    (recognizing that in Sullivan, “it was obvious that the ‘Mississippi cook’ evidence at issue
    was not related to the crime charged”).
    38
    permissible purposes under Rule 404(b)—that is, to prove knowledge and intent.
    b
    Under the second Huddleston factor, the other-acts evidence must also be
    relevant. See Farr, 701 F.3d at 1280; Becker, 
    230 F.3d at 1232
    . Mr. Watson’s
    only argument on this score is that Mr. Shuck’s testimony related to events so
    removed in time from the events in question that it lacked relevance. It is true, as
    Mr. Watson contends, that the length of time separating the past acts and the
    charged conduct has a bearing on the relevancy of the other-acts evidence. In this
    regard, “we have noted that prior narcotics involvement is relevant when that
    conduct is close in time, highly probative, and similar to the activity with which
    the defendant is charged.” Becker, 
    230 F.3d at 1232
     (quoting United States v.
    Wilson, 
    107 F.3d 774
    , 785 (10th Cir. 1997)) (internal quotation marks omitted).
    Indeed, we have held that “two prior felony convictions [that] preceded the
    incident by approximately six years and . . . four years . . . transcends our
    conception of close in time.” 
    Id.
     (quoting Wilson, 
    107 F.3d at 785
    ) (internal
    quotation marks omitted).
    The outdoor marijuana growing operation about which Mr. Shuck testified
    occurred approximately ten to seventeen years before the crimes charged. But our
    holding in Becker regarding acts occurring four and six years prior to the crimes
    charged did not establish a bright-line rule for the relevance of other-acts
    evidence. Under the right circumstances, the “[s]imilarity of prior acts to the
    39
    charged offense may outweigh concerns of remoteness in time.” United States v.
    Meacham, 
    115 F.3d 1488
    , 1495 (10th Cir. 1997); see Weinstein’s, supra,
    § 404.21[2][c], at 404-76 to 404-77 (“If the connection between the other crime
    and the charged crime is strong, admission may be appropriate, even if the other
    acts were remote in time.”).
    Here, any concerns about the other-acts evidence being too remote are
    outweighed by the similarity between the other-acts evidence and the crimes
    charged. The challenged testimony revealed that Mr. Watson previously
    cultivated marijuana with the same individual with whom he was currently
    charged. For all practical purposes, the other-acts evidence demonstrated that Mr.
    Watson previously engaged in almost the exact same conduct with the exact same
    person. When the similarities are this evident, we have had no trouble concluding
    that the “[s]imilarity of [the] prior acts to the charged offense[s] . . . outweigh[s]
    concerns of remoteness in time.” Meacham, 
    115 F.3d at 1495
    ; see also Brooks,
    736 F.3d at 940 (“The fact that [Defendant] previously dealt drugs with the
    coconspirators helps establish the basis of the relationship between them and his
    intent to do the same. [Defendant] teamed up with them to deal drugs in 2000,
    and those relationships made it more likely he intended to team up with them
    again [six to ten years later in the charged narcotics conspiracy] from 2006 to
    2010, rather than just carrying on as an independent seller.” (emphasis added)).
    Indeed, prior acts that were quite remote to the crimes charged have
    40
    frequently been deemed by us and our sister circuits to be relevant if they were
    sufficiently similar to those crimes. See United States v. Rodriguez, 
    215 F.3d 110
    , 121 (1st Cir. 2000) (holding that the “striking similarity between the acts
    alleged in the indictment and the prior incidents” rendered incidents that occurred
    fifteen years prior to the acts alleged in the indictment relevant and admissible
    under Rule 404(b)); United States v. Hernandez-Guevara, 
    162 F.3d 863
    , 873 (5th
    Cir. 1998) (holding that evidence of an eighteen-year-old conviction was
    admissible to show intent because that conviction “involved exactly the same
    crime as was charged in the indictment”); Meacham, 
    115 F.3d at 1495
     (holding
    that testimony that the defendant molested his stepdaughters twenty-five to
    twenty-nine years prior to the crime charged—that is, transporting a minor in
    interstate commerce with the intent that she engage in sexual activity—was
    admissible to prove the defendant’s intent because it “suggest[ed] a similar
    pattern of sexual abuse of female minor relatives made possible by exploitation of
    familial authority”).
    In fact, “[t]here is no absolute rule regarding the number of years that can
    separate offenses. Rather, the court applies a reasonableness standard and
    examines the facts and circumstances of each case.” United States v. Shumway,
    
    112 F.3d 1413
    , 1421 (10th Cir. 1997) (alteration in original) (quoting United
    States v. Franklin, 
    704 F.2d 1183
    , 1189 (10th Cir. 1983)) (internal quotation
    marks omitted); see Rodriguez, 
    215 F.3d at 120
     (“[T]here is no per se rule to
    41
    determine when a prior bad act is ‘too old’ to be admissible.”); see also Cherry,
    
    433 F.3d at
    702 n.4 (“[W]e review the facts and circumstances of each case to
    determine whether a prior act is stale.”); cf. United States v. Mares, 
    441 F.3d 1152
    , 1159 (10th Cir. 2006) (“Our cases make clear that the degree to which
    factors such as temporal distance and geographical proximity are important to a
    determination of the probative value of similar acts will necessarily depend on the
    unique facts of each case’s proffered evidence.”).
    This is an unremarkable proposition because the second Huddleston factor
    involves a relevancy inquiry under Rule 401. See 
    485 U.S. at 691
    ; Becker, 
    230 F.3d at 1232
    . That rule deems evidence relevant if it “has any tendency to make a
    fact more or less probable than it would be without the evidence” if “the fact is of
    consequence in determining the action.” Fed. R. Evid. 401. Such an inquiry is
    necessarily a fact-laden, case-specific one; not surprisingly, it takes into account
    not only the temporal remoteness of the other-acts evidence from the charged
    crimes, but also its similarity to those crimes. Consequently, adopting an
    approach that would involve reflexively applying time periods found too distant
    in other cases to the case at hand in determining whether the other-acts evidence
    at issue is relevant would be wrongheaded—notably, because it would effect a
    marked departure from the particularized inquiry that Rule 401 contemplates.
    Thus, we would be hard-pressed to conclude that the other-acts
    evidence—in the form of Mr. Shuck’s testimony—regarding Mr. Watson’s past
    42
    drug-related conduct with Mr. Shuck was irrelevant simply because it pertained to
    events that are comparatively remote from the charged crimes. In other words,
    we would have difficulty concluding that this other-acts evidence did not have
    any tendency to make a fact of consequence, in the form of Mr. Watson’s
    knowledge and intent, more probable. And we in fact cannot reach that
    conclusion. The evidence of Mr. Watson’s prior outdoor grow with Mr. Shuck
    had a tendency to make it more likely that Mr. Watson knew that Mr. Shuck was
    growing marijuana in the trailer on his land and that he intended to participate in
    that endeavor, as he had previously done. In sum, we conclude that the other-acts
    evidence—that is, the outdoor-grow testimony of Mr. Schuck—satisfies the
    second Huddleston factor.
    c
    Lastly, Mr. Watson challenges the third Huddleston factor—whether the
    evidence was admissible under Rule 403. See Farr, 701 F.3d at 1280; Becker,
    
    230 F.3d at 1232
    . Rule 403 provides that a “court may exclude relevant evidence
    if its probative value is substantially outweighed by a danger of one or more of
    the following: unfair prejudice, confusing the issues, misleading the jury, undue
    delay, wasting time, or needlessly presenting cumulative evidence.” Fed. R. Evid.
    403. After explaining why Mr. Shuck’s testimony was otherwise admissible, the
    district court found that Rule 403 did not preclude its admission. Although it
    recognized that the evidence “may prejudice” Mr. Watson, the district court
    43
    concluded that the evidence was “highly relevant to the offenses charged” and
    thus had “significant probative value.” R., Vol. I, at 80 (Op. & Order, filed Feb.
    28, 2012). Moreover, the court determined that, in any event, “the probative
    value of the evidence [was] not substantially outweighed by any unfair
    prejudice.” 
    Id.
    The burden facing litigants seeking to demonstrate that a district court
    abused its discretion when conducting Rule 403 balancing is onerous. First, as a
    general matter, “our law favors admission of all relevant evidence not otherwise
    proscribed; thus, exclusion under this rule is ‘an extraordinary remedy [that]
    should be used sparingly.’” United States v. Irving, 
    665 F.3d 1184
    , 1213 (10th
    Cir. 2011) (alteration in original) (quoting United States v. Rodriguez, 
    192 F.3d 946
    , 949 (10th Cir. 1999)); accord Smalls, 752 F.3d at 1238; Tan, 
    254 F.3d at 1211
    . Second, not only is exclusion under Rule 403 disfavored as a general
    matter, but our review of a district court’s Rule 403 determination is limited: “We
    afford district courts ‘broad discretion in making rulings under Rule 403.’”
    Cherry, 
    433 F.3d at 702
     (quoting Ramirez, 
    63 F.3d at 943
    ). We grant district
    courts this “considerable discretion” in performing Rule 403 balancing because
    “district court judges have front-row seats during trial and extensive experience
    ruling on evidentiary issues.” United States v. MacKay, 
    715 F.3d 807
    , 839 (10th
    Cir. 2013) (quoting United States v. Cerno, 
    529 F.3d 926
    , 935–36 (10th Cir.
    2008)) (internal quotation marks omitted), cert. denied, --- U.S. ----, 
    134 S. Ct. 44
    1275 (2014); accord United States v. Archuleta, 
    737 F.3d 1287
    , 1292 (10th Cir.
    2013), cert. denied, --- U.S. ----, 
    134 S. Ct. 2859
     (2014).
    “In determining whether evidence is properly admitted under Rule 403, we
    consider (1) whether the evidence was relevant, (2) whether it had the potential to
    unfairly prejudice the defendant, and (3) whether its probative value was
    substantially outweighed by the danger of unfair prejudice.” MacKay, 715 F.3d at
    839 (emphasis added) (quoting Cerno, 
    529 F.3d at 933
    ) (internal quotation marks
    omitted); accord Burgess, 
    576 F.3d at
    1098–99. The district court made findings
    as to all three factors that supported admission of the evidence, and Mr. Watson
    does not provide us with any basis to disturb the district court’s decision.
    In fact, Mr. Watson spends little time developing his Rule 403 argument.
    He generally asserts that the other-acts evidence lacked probative value due to its
    remoteness and its lack of connection to the charged crimes. We rejected such
    arguments during our analysis of the first two Huddleston factors supra. 16 First,
    we recognized the relevance of the challenged evidence to prove, inter alia, that
    Mr. Watson acted with the requisite knowledge and intent to commit the crimes
    16
    To be sure, the assessment of the probative value of evidence under Rule
    403 is distinct from the evidence’s relevance under Rule 401 in that the measurement of
    probative value “is determined by comparing evidentiary alternatives.” Weinstein’s,
    supra, § 404.21[3][a], at 404-82.1. But Mr. Watson does not advance any arguments
    regarding the probative value of the evidence from this angle—that is, he does not argue
    that the challenged evidence was cumulative or unnecessary in light of the government’s
    other evidence. Thus, we need not assess the evidence from this perspective and address
    only the arguments Mr. Watson presents.
    45
    charged despite the remoteness of the past acts. Second, as also demonstrated
    supra, any contention that the prior acts lack probative value due to their
    dissimilarity with the charged conduct is belied by the evidence. As the district
    court recognized in its order, “[t]he earlier marijuana grow operation involved the
    same people, the same controlled substance, and the same offenses.” R., Vol. I,
    at 79. We agree with the district court that the similarities between Mr. Watson’s
    prior conduct and the conduct charged give the other-acts evidence “significant
    probative value.” Id. at 80; see Zamora, 
    222 F.3d at 762
     (“The more similar the
    act . . . is to the charged crime, the more relevant it becomes.”).
    We underscore that “Rule 403 does not protect a party from all prejudice,
    only unfair prejudice.” United States v. Smith, 
    534 F.3d 1211
    , 1218–19 (10th Cir.
    2008) (emphasis added) (quoting Deters v. Equifax Credit Info. Servs., Inc., 
    202 F.3d 1262
    , 1274 (10th Cir. 2000)) (internal quotation marks omitted); see
    Esquivel-Rios, 725 F.3d at 1240 (noting that the prejudicial effect stemming from
    the capacity of certain evidence to rebut a defendant’s exculpatory theory “alone
    is not usually enough to establish unfair prejudice”). We measure unfair
    prejudice by assessing whether the “[e]vidence . . . makes a conviction more
    likely because it provokes an emotional response in the jury or otherwise tends to
    affect adversely the jury’s attitude toward the defendant wholly apart from its
    judgment as to his guilt or innocence of the crime charged.” MacKay, 715 F.3d at
    840 (quoting United States v. Leonard, 
    439 F.3d 648
    , 652 (10th Cir. 2006))
    46
    (internal quotation marks omitted); see Irving, 
    665 F.3d at 1213
     (“[U]nfair
    prejudice in the Rule 403 context ‘means an undue tendency to suggest decision
    on an improper basis, commonly, though not necessarily, an emotional one.’”
    (quoting Tan, 
    254 F.3d at 1211
    )). The district court found on this record that the
    challenged other-acts “evidence may prejudice [Mr. Watson].” R., Vol. I, at 80.
    However, the court did not make a finding that the evidence would do so unfairly.
    And we discern no support for such a finding in the record.
    Moreover, we cannot say that the district court abused its discretion in
    ultimately deciding that the other-acts evidence had “significant probative value”
    that was not substantially outweighed by any possible prejudice—unfair or
    otherwise. Cf. Irving, 
    665 F.3d at 1214
     (“Even if . . . prejudice is found, it must
    substantially outweigh the probative value of the evidence in order to be excluded
    under Rule 403.” (quoting Tan, 
    254 F.3d at 1212
    ) (internal quotation marks
    omitted)). 17 Indeed, we have consistently upheld district courts’ Rule 403
    17
    Again, Mr. Watson’s reliance on Sullivan for his Rule 403 argument is
    misplaced. In Sullivan, the district court found the evidence prejudicial and “clearly
    announced [its] view that [the Mississippi cook] evidence was not relevant.” 919 F.2d at
    1417. Even assuming arguendo that the challenged other-acts evidence was not only
    prejudicial, but to some degree unfairly so, unlike in Sullivan, the evidence at issue here
    had significant probative value; therefore, the unfair prejudicial effect had to be great to
    substantially outweigh this probative value, and no level of alchemy by Mr. Watson could
    demonstrate such an effect on this record. Mr. Watson’s reliance on United States v.
    McDermott, 
    64 F.3d 1448
     (10th Cir. 1995), is equally unavailing. There, the defendant
    was charged with, inter alia, engaging in a continuing criminal enterprise. See 
    id. at 1450
    . The government introduced testimony that the witness had called the defendant a
    “pothead and a drug dealer” before the defendant threatened to have her killed, but “[t]he
    (continued...)
    47
    determinations in cases such as this when the other-acts evidence at issue is
    sufficiently similar to the crime with which the defendant is charged. See, e.g.,
    United States v. Conway, 
    73 F.3d 975
    , 981 (10th Cir. 1995) (“Given the similarity
    of the circumstances between [the defendant’s] prior drug-related arrests and the
    incident for which he was convicted, the probative value of the evidence was very
    high for the purposes of showing a common plan, knowledge, intent, and the
    absence of mistake or accident. Accordingly, any potentially prejudicial impact
    had to be extremely heavy, in order for the district court to have deemed the
    evidence inadmissible under Rule 403[, and in this case, it was not].”); cf. United
    States v. Easter, 
    981 F.2d 1549
    , 1554 (10th Cir. 1992) (upholding the district
    court’s admittance of the defendant’s prior cocaine dealing with a co-conspirator
    under Rules 403 and 404(b) when the defendant was charged with conspiracy to
    possess and distribute cocaine, reasoning that the acts were close in time to the
    charged conduct and that the uncharged acts “involved one of [the defendant’s]
    17
    (...continued)
    government never specifically stated the purpose for which it was offering the evidence
    or the precise inferences to be drawn from it.” Id. at 1456 (internal quotation marks
    omitted). The district court initially excluded the evidence under Rule 403, but later
    altered course and admitted the evidence. See id. Although we recognized that the
    evidence could have been offered for a proper purpose under Rule 404(b), we held that
    the district court was right the first time, as the necessary link between the evidence and
    the crime charged turned out to be unexpectedly weak once the witness actually testified.
    See id. at 1456–57. This case is a far cry from McDermott. As we have discussed at
    length, the similarities between Mr. Watson’s prior conduct and the charged crimes was
    quite strong. And, further, Mr. Shuck’s testimony was nearly identical to what the
    government represented it would be in its notice of intent to offer Rule 404(b) evidence.
    48
    coconspirators, and involved distribution of cocaine base—the same scheme with
    which [the] [d]efendant was eventually charged”).
    The crimes with which Mr. Watson was charged were strikingly similar to
    the prior acts as to which Mr. Shuck testified. Therefore, this case fits
    comfortably within the caselaw admitting such similar other-acts evidence under
    Rule 403. For this reason, and because Mr. Watson has provided no basis for us
    to find that the district court erred in its Rule 403 balancing, the third Huddleston
    factor is also satisfied.
    In sum, for the reasons stated, we affirm the district court’s admittance of
    Mr. Shuck’s other-acts testimony on the alternative ground that the testimony was
    admissible under Rule 404(b).
    B
    We turn next to Mr. Watson’s challenge to Ms. Armbruster’s testimony.
    Ms. Armbruster testified, as a rebuttal witness, that, inter alia, she purchased
    marijuana from Mr. Watson from 1994 or 1995 through 2000 or 2001 and had
    previously used marijuana with him. Mr. Watson challenges this testimony for
    the same reasons he challenges Mr. Shuck’s; indeed, he does not distinguish
    between the two witnesses’ testimony in his briefing and instead addresses their
    testimony collectively. This approach is misguided. More specifically, Mr.
    Watson’s argument is untenable because it is based on a false premise—that Ms.
    Armbruster’s testimony was admitted under Rule 404(b). Actually, Ms.
    49
    Armbruster’s testimony was expressly admitted by the district court for
    impeachment purposes, instead of as substantive evidence under Rule 404(b). 18
    18
    Ms. Armbruster testified in rebuttal after Mr. Watson left the witness stand.
    Mr. Watson’s counsel complained that his direct examination of Mr. Watson did not open
    the door to Ms. Armbruster’s testimony because the examination only covered the
    approximate period of the crimes charged. Specifically, counsel contended that Mr.
    Watson’s testimony “never went back to the time” covered by Ms. Armbruster’s
    testimony—i.e., from 1994 or 1995 through 2000 or 2001. R., Vol. II, at 482 (Jury Trial
    Tr., dated Feb. 29, 2012). In other words, under the reasoning of Mr. Watson’s counsel,
    Ms. Armbruster’s testimony would be improper because it would not relate to the same
    time period as the substantive evidence offered by Mr. Watson’s direct-examination
    testimony. However, the district court immediately responded and clarified the basis for
    the admission of Ms. Armbruster’s testimony: “[Mr. Watson is] denying everything that
    Mr. Shuck said on the stand and I’m going to allow them to inquire as to his use and sale
    of marijuana. It’s [i.e., Ms. Armbruster’s testimony is] impeachment.” Id. The district
    court underscored the basis for its ruling during the course of Ms. Armbruster’s
    testimony. After Mr. Watson left the witness stand, Ms. Armbruster testified that she had
    used marijuana, and then the government asked her where she “generally g[ot] [her]
    marijuana from,” and she testified that “[a] lot of times we got it from [Mr.] Watson.” Id.
    at 492. Mr. Watson’s counsel objected, and then the following exchange occurred at the
    bench:
    THE COURT: Mr. Watson took the stand and denied any involvement
    in any activities related to this case.
    [DEFENSE COUNSEL]: In cross-examination.
    THE COURT: Well, he took the stand in direct in answer to your
    questions and said he was not involved in a conspiracy with Mr. Shuck
    and did not grow or use marijuana. You asked him if he uses marijuana
    and they asked him if he uses marijuana, and he denied he ever
    distributed marijuana. I am allowing this testimony [i.e., of Ms.
    Armbruster].
    Id. at 492–93. In other words, the district court expressly admitted Ms. Armbruster’s
    testimony regarding purchasing marijuana from Mr. Watson, and using it with him,
    during a period earlier than the charged crimes to impeach Mr. Watson’s testimony that
    he never used or distributed marijuana.
    50
    As such, Ms. Armbruster’s testimony was qualitatively different than Mr.
    Shuck’s, or any other Rule 404(b) testimony. “[E]vidence offered under Rule
    404(b) is substantive evidence against the accused, i.e., it is part of the
    government’s case offered to prove his guilt beyond a reasonable doubt.” United
    States v. Haslip, 
    160 F.3d 649
    , 654 (10th Cir. 1998) (alteration in original)
    (emphasis added) (quoting United States v. Valencia, 
    61 F.3d 616
    , 619 (8th Cir.
    1995)) (internal quotation marks omitted). On the other hand, impeachment
    evidence serves a different purpose altogether, related to challenging witness
    credibility. In other words, substantive evidence is that which is “offered to help
    establish a fact in issue,” Black’s Law Dictionary 640 (9th ed. 2009), while
    impeachment evidence is offered to “undermine a witness’s credibility,” 
    id. at 637
    ; see Friedman v. Rehal, 
    618 F.3d 142
    , 153–54 (2d Cir. 2010)
    (“[I]mpeachment evidence . . . is offered to discredit a witness . . . to reduce the
    effectiveness of [her] testimony by bringing forth evidence which explains why
    the jury should not put faith in [her] or [her] testimony.” (second, third, and
    fourth alterations in original) (second omission in original) (quoting Chiasson v.
    Zapata Gulf Marine Corp., 
    988 F.2d 513
    , 517 (5th Cir. 1993)) (internal quotation
    marks omitted)); United States v. Harris, 
    557 F.3d 938
    , 942 (8th Cir. 2009)
    (“Impeachment is an attack on the credibility of a witness . . . .” (internal
    quotation marks omitted)); cf. United States v. Carter, 
    973 F.2d 1509
    , 1512 (10th
    Cir. 1992) (“A witness’ ‘prior statements are admissible only to impeach or
    51
    discredit the witness and are not competent substantive evidence of the facts to
    which the former statements relate.’” (quoting United States v. Eaton, 
    485 F.2d 102
    , 105 (10th Cir.1973))); cf. also Regan-Touhy v. Walgreen Co., 
    526 F.3d 641
    ,
    651 (10th Cir. 2008) (“[A] prior statement offered for impeachment purposes is
    admissible only to show that the speaker is not worthy of belief; it is not received
    for the truth of the matter asserted.”).
    Ms. Armbruster was a rebuttal witness. Rebuttal evidence “allows a party
    to ‘explain, repel, contradict or disprove an adversary’s proof,’” United States v.
    Magallanez, 
    408 F.3d 672
    , 681 (10th Cir. 2005) (quoting United States v.
    LiCausi, 
    167 F.3d 36
    , 52 (1st Cir. 1999)), and its limits are within the sound
    discretion of the district court, see Geders v. United States, 
    425 U.S. 80
    , 86
    (1976) (“Within limits, the judge may control the scope of rebuttal
    testimony . . . .”). Here, the district court expressly reasoned that Ms.
    Armbruster’s rebuttal testimony cast doubt on the veracity of Mr. Watson’s
    direct-examination testimony that he did not use marijuana and had never assisted
    Mr. Shuck in growing marijuana for distribution. 19 In other words, the district
    19
    This is not to say that rebuttal-witness testimony is categorically only
    admissible as impeachment evidence (as opposed to substantive evidence). Indeed, in
    certain circumstances, rebuttal evidence can constitute substantive evidence. See Harris,
    
    557 F.3d at
    942–43 (holding that the challenged evidence the government introduced in
    rebuttal was substantive evidence and “not . . . relevant for impeachment purposes”
    because it was “not offered to show that [the witness] was not a credible person but to
    show that” she was not at the defendant’s home during the relevant time, making her
    testimony that she did not see any drug-related activity while at the defendant’s home
    (continued...)
    52
    court admitted the evidence not because it helped establish a fact at issue, but
    because it called into question the truthfulness of Mr. Watson’s testimony. Thus,
    in short, the challenged testimony was “not offer[ed] . . . for any of the purposes
    covered by Rule 404, proper or improper, but rather to impeach credibility.”
    United States v. Rackley, 
    986 F.2d 1357
    , 1363 (10th Cir. 1993); accord United
    States v. Burch, 
    153 F.3d 1140
    , 1144 (10th Cir. 1998).
    When a defendant, like Mr. Watson, challenges evidence under Rule 404(b)
    that was admitted solely for impeachment purposes, we need not pursue the Rule
    404(b) challenge any further. See Burch, 
    153 F.3d at 1143
     (declining to assess
    the defendant’s Rule 404(b) challenge to certain evidence because he
    “misunderstood the basis for its admission”); Rackley, 
    986 F.2d at 1363
     (“We find
    defendant’s argument based on [Rule] 404(b) standards to be incorrect because
    the [challenged evidence admitted via] cross-examination . . . was not 404(b)
    evidence. It went to the issue of the witnesses’ credibility, and was properly
    admitted as impeachment under [Rule] 611(b).”); cf. United States v. Crockett,
    
    435 F.3d 1305
    , 1312 (10th Cir. 2006) (“Although Defendant couches his
    argument in terms of the allegedly erroneous admission of evidence under [Rule]
    404(b), that rule is only tangentially related to the allegation of error here. The
    dispositive issue is the proper scope of cross-examination.”).
    19
    (...continued)
    irrelevant). However, in this case, the challenged testimony of the rebuttal witness, Ms.
    Armbruster, was admitted to impeach Mr. Watson’s direct-examination testimony.
    53
    Mr. Watson’s misunderstanding about the actual basis for admitting Ms.
    Armbruster’s testimony—that is, impeachment—has resulted in him waiving
    through briefing omission any challenge to that true basis. See, e.g., O’Neal v.
    Ferguson Constr. Co., 
    237 F.3d 1248
    , 1257 n.1 (10th Cir. 2001) (“We will not
    make arguments for [a party] that it did not make in its briefs.”). And it
    ineluctably follows that the challenge that he has made under Rule 404(b) cannot
    give him succor because it is wholly inapposite. Accordingly, Mr. Watson’s
    challenge to Ms. Armbruster’s testimony must fail. 20
    V
    For the foregoing reasons, Mr. Watson’s conviction is AFFIRMED.
    20
    Even if we put aside the district court’s explicit statements and assume
    arguendo that Ms. Armbruster’s testimony actually was admitted as substantive evidence
    of Mr. Watson’s guilt under Rule 404(b)—rather than impeachment evidence—we would
    still conclude that her testimony was properly admissible other-acts evidence.
    Significantly, Mr. Watson does not attempt to distinguish in his Rule 404(b) arguments
    between the testimony of Mr. Shuck and Ms. Armbruster. In other words, insofar as there
    are features of Ms. Armbruster’s testimony that would make it admissible under Rule
    404(b), even if Mr. Shuck’s testimony was not, Mr. Watson has not identified those
    features for us. Therefore, when we concluded supra that Mr. Watson’s Rule 404(b)
    arguments regarding Mr. Shuck were untenable and, consequently, must fail, we
    necessarily addressed the merits of any tacit Rule 404(b) arguments advanced by Mr.
    Watson regarding Ms. Armbruster and reached the same conclusion—viz., in rejecting
    Mr. Watson’s arguments regarding Mr. Shuck’s testimony, we simultaneously sounded
    the death knell for any of his Rule 404(b) arguments regarding Ms. Armbruster’s
    testimony.
    54