United States v. Walker ( 2019 )


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  •                                                                      FILED
    United States Court of Appeals
    Tenth Circuit
    March 25, 2019
    PUBLISH
    Elisabeth A. Shumaker
    UNITED STATES COURT OF APPEALS Clerk of Court
    TENTH CIRCUIT
    UNITED STATES OF AMERICA,
    Plaintiff - Appellant,
    v.                                                    No. 17-4103
    JOHN EUGENE WALKER,
    Defendant - Appellee.
    Appeal from the United States District Court
    for the District of Utah
    (D.C. No. 2:13-CR-00379-CW-1)
    Jennifer Williams, Assistant United States Attorney (John W. Huber, United
    States Attorney, and Jeannette F. Swent, Assistant United States Attorney, with
    her on brief), District of Utah, Salt Lake City, Utah, for Plaintiff-Appellant.
    Adam Bridge, Assistant Federal Public Defender (Kathryn N. Nester, Federal
    Public Defender, Scott Keith Wilson, and Bretta Pirie, Assistant Federal Public
    Defenders, on brief), District of Utah, Salt Lake City, Utah, for Defendant-
    Appellee.
    Before TYMKOVICH, Chief Judge, HOLMES, and PHILLIPS, Circuit Judges.
    HOLMES, Circuit Judge.
    This case comes before us for a second time. Defendant-Appellee John
    Walker, who pleaded guilty to two counts of bank robbery under 18 U.S.C.
    § 2113(a), was originally sentenced to time served—thirty-three days in pretrial
    detention—followed by three years of supervised release. The government
    appealed, and we reversed the sentence as substantively unreasonable and
    remanded for resentencing consistent with our opinion. On remand, the district
    court received new arguments and evidence before resentencing Mr. Walker to ten
    years of probation, two years of home confinement, and 500 hours of community
    service.
    The government appeals again, and we are now asked (1) whether the
    district court, on remand, violated the mandate we issued in United States v.
    Walker (“Walker I”), 
    844 F.3d 1253
    (10th Cir. 2017), by not sentencing Mr.
    Walker to a term of imprisonment; and (2) whether, even if the district court
    complied with our mandate, Mr. Walker’s sentence following our remand
    nevertheless remains substantively unreasonable. The government also requests,
    in the event that we reverse and remand for resentencing, that we reassign the
    case to a different district court judge. Because we conclude that the district
    court did not run afoul of Walker I’s mandate when it declined to sentence Mr.
    Walker to a prison term and further conclude that the government has waived its
    remaining substantive reasonableness challenge, we affirm the district court’s
    sentence. And, consequently, we deny as moot the government’s request for
    reassignment.
    2
    I
    We start by surveying (A) Mr. Walker’s offense conduct, (B) the district
    court’s original sentencing proceeding, (C) our opinion in Walker I, (D) the
    district court’s resentencing proceeding, and (E) the district court’s resentencing
    order.
    A
    In May 2013, Mr. Walker walked into a bank in Salt Lake City, Utah, while
    wearing a wig and fake mustache and yelled at the teller to give him money. 1 The
    teller gave him over two thousand dollars, and Mr. Walker left without further
    incident. Later that same month, Mr. Walker entered a second bank, this time in
    Sandy, Utah, while dressed in women’s clothing. Again, he yelled at the teller,
    took over fifteen hundred dollars, and left. Police subsequently arrested Mr.
    Walker, who admitted to robbing both banks. Mr. Walker was indicted on two
    counts of bank robbery in violation of 18 U.S.C. § 2113(a). Although he was
    taken into custody after the arrest, he was released on pretrial supervision thirty-
    three days later. He subsequently pleaded guilty to both counts of bank robbery.
    B
    Shortly before Mr. Walker’s sentencing hearing, he violated the conditions
    1
    Our recitation of the offense conduct comes from Mr. Walker’s
    Presentence Report. See R. at 644–45, ¶¶ 5–8 (Presentence Report, dated Sept.
    18, 2015) [hereinafter, “PSR”].
    3
    of his release when he was cited for driving under the influence and with an open
    container. After receiving these charges, Mr. Walker requested that the court
    defer his sentencing for thirteen months so that he could attend a faith-based
    residential treatment program. The district court granted the deferral, and Mr.
    Walker successfully completed the program.
    At Mr. Walker’s subsequent sentencing hearing, the court accepted the
    PSR’s findings and calculated Mr. Walker’s United States Sentencing Guidelines
    (“Guidelines” or “U.S.S.G.”) range to be 151 to 188 months’ imprisonment. 2 This
    range reflected Mr. Walker’s extensive criminal history, which, as Mr. Walker
    conceded, included involvement in at least ten previous bank robberies. The
    government argued for a below-Guidelines-range sentence of 120 months’
    imprisonment, whereas Mr. Walker—emphasizing his rehabilitation through the
    residential treatment program—argued for a five-year term of probation.
    The district court discussed the 18 U.S.C. § 3553(a) factors but, in
    sentencing Mr. Walker, relied almost exclusively on his rehabilitation. The court
    gave Mr. Walker a time-served sentence, i.e., the thirty-three days of pre-trial
    detention, followed by thirty-six months of supervised release.
    2
    The Probation Office used the 2013 edition of the Guidelines in
    calculating Mr. Walker’s Guidelines range. Neither party questions this choice on
    appeal; therefore, we also rely on the 2013 edition, to the extent that it is relevant
    to the resolution of the issues on appeal.
    4
    C
    The government appealed from the district court’s sentence, claiming that it
    was substantively unreasonable. We reversed and remanded for resentencing,
    acknowledging that “the sentencing court sincerely tried to craft a just sentence”
    but concluding that “the court placed inadequate weight on the factors required by
    Congress.” Walker 
    I, 844 F.3d at 1255
    . To make this point, we assessed the
    district court’s reasoning against the relevant § 3553(a) factors.
    We concluded that only one—the nature and circumstances of the crime and
    Mr. Walker’s history and characteristics, see § 3553(a)(1)—provided even partial
    support for a time-served sentence. As to that factor, we noted that “[t]he nature
    of the offense weighs strongly against a time-served sentence” but that “the
    offender’s characteristics could reasonably support leniency.” Walker 
    I, 844 F.3d at 1257
    . The other § 3553(a) factors, however, favored imprisonment or were
    irrelevant. For instance, § 3553(a)(2)—that is, the need for the sentence imposed
    to reflect “the congressional aims of sentencing”—“weigh[ed] against a time-
    served sentence.” 
    Id. at 1258.
    We noted that “[t]he district court gave inadequate
    attention” to certain congressional aims, 
    id. (discussing general
    deterrence); see
    
    id. (“the value
    of incapacitation . . . was never mentioned at sentencing” (citation
    omitted)), and found that some of these aims cut against the district court’s
    sentencing conclusion, 
    id. (“The value
    of incapacitating Mr. Walker further
    supports incarceration of Mr. Walker.”).
    5
    We also determined that the sentencing range established by the Guidelines
    and the need to avoid unwarranted disparities, see § 3553(a)(4), (6), both
    “weigh[ed] against a time-served sentence.” Walker 
    I, 844 F.3d at 1258
    . To
    underscore this point, we compared Mr. Walker to the defendant in United States
    v. Friedman, 
    554 F.3d 1301
    (10th Cir. 2009). We explained that in Friedman the
    defendant had also pleaded guilty to bank robbery and faced an identical
    Guidelines range. See Walker 
    I, 844 F.3d at 1259
    . The district court in that case
    had imposed a sentence of fifty-seven months’ imprisonment, but “we concluded
    that this sentence was substantively unreasonable because (1) the defendant had
    an extensive history of recidivism and lacked remorse and (2) the 57-month
    sentence created unwarranted sentence disparities.” 
    Id. While the
    Walker I panel
    noted some differences between the two cases, it reasoned that “[i]f the 57 months
    of incarceration in Friedman was an unreasonably light sentence, Mr. Walker’s 33
    days in pretrial detention was also unreasonably light.” 
    Id. In sum,
    we concluded that, “[o]f the seven sentencing factors, three factors
    weigh[ed] against a time-served sentence, one point[ed] both ways, and three
    [were] inapplicable.” 
    Id. at 1259.
    Thus, we held that the district court erred
    because it “focused almost exclusively on Mr. Walker’s new found
    sobriety”—i.e., a characteristic of Mr. Walker—to the exclusion of the other
    factors. 
    Id. While we
    did “not question the materiality of this factor,” we held
    that “by declining to impose any prison time, the district court effectively failed
    6
    to give any weight to the congressional values of punishment, general deterrence,
    incapacitation, respect for the law, and avoidance of unwarranted sentencing
    disparities.” Id.; see 
    id. at 1255
    (“In our view, this sentence was unreasonably
    short based on the statutory sentencing factors and our precedent.”).
    We ended the opinion as follows:
    We conclude that 33 days in pretrial detention constitutes an
    unreasonably short sentence. For admittedly robbing two banks
    as an armed career offender, [3] Mr. Walker would avoid any
    punishment and the sentence would give little or no weight to the
    congressional values of punishment, general deterrence,
    incapacitation, respect for the law, and avoidance of unwarranted
    sentence disparities. In these circumstances, we regard the
    sentence as substantively unreasonable.
    Reversed and remanded for resentencing consistent with this
    opinion.
    
    Id. at 1259–60.
    Judge Hartz wrote a brief concurrence wherein he disagreed with the
    majority’s analysis of the nature and circumstances of the crime and Mr. Walker’s
    history and characteristics, see § 3553(a)(1). Walker 
    I, 844 F.3d at 1260
    (Hartz,
    J. concurring). In his view, Mr. Walker’s “short period of apparent rehabilitation
    hardly counterbalances the seriousness of his offense and his extensive criminal
    3
    While we referred to Mr. Walker as an “armed career offender” in
    Walker I, the district court correctly noted on remand that “Mr. Walker was not
    armed during the two bank robberies in this case,” and that, while the PSR
    classified Mr. Walker as a career offender, he was neither charged nor sentenced
    under the Armed Career Criminal Act, 18 U.S.C. § 924. R. at 354 n.1 (Mem.
    Decision and Order on Resentencing, dated May 18, 2017).
    7
    record.” 
    Id. D On
    remand, the district court ordered the Probation Office to provide an
    update to the PSR that detailed Mr. Walker’s lifestyle and conduct since the
    original sentencing. The court also ordered the parties to file supplemental
    briefing responding to Walker I, and it allowed the parties to submit supplemental
    evidence.
    The update to the PSR explained that Mr. Walker had complied with all
    conditions of his supervision, maintained employment, and was living a modest
    life. Mr. Walker’s Probation Officer also testified at a subsequent evidentiary
    hearing, stating that he did not “think a custody sentence would be beneficial in
    Mr. Walker’s case” because of the “positive changes” that Mr. Walker had made
    in his life, namely his sobriety, employment, and familial ties. R. at 540–41 (Tr.
    of Evidentiary Hr’g on Resentencing, dated Apr. 24, 2017).
    Mr. Walker submitted additional evidence of his rehabilitation. His wife
    testified about the positive effect that Mr. Walker had on her relationships with
    her daughter and granddaughter. Mr. Walker’s other family members and
    drug-treatment-program classmates sent the district court “a small flood of
    letters” that the court characterized as “uniformly praising his character, work
    ethic, and the progress he [had] made in the past years.” 
    Id. at 361.
    Mr. Walker’s
    counselor submitted a written statement that indicated Mr. Walker had been
    8
    “rehabilitated,” no longer craved alcohol and drugs, and now “turn[ed] to God, his
    faith community and mentors” during stressful periods. 
    Id. at 360–61.
    This
    counselor also testified at the evidentiary hearing, where she opined that
    removing Mr. Walker from his support system would “absolutely have a negative
    effect on him.” 
    Id. at 553.
    At the end of the evidentiary hearing, Mr. Walker addressed the court. He
    testified that it was his “drinking that le[d] to other things,” and that it was only
    when he was using drugs that he would “think about a bank.” 
    Id. at 620.
    He
    added that he “would never do a bank robbery if [he] wasn’t under the influence.”
    
    Id. at 617.
    He claimed that this problematic path from drug abuse to crime was
    “not going to happen” again because he had “been transformed,” was “not the old
    Johnny,” and did not “even think about drinking” anymore. 
    Id. at 620.
    The government, on the other hand, submitted its own additional evidence.
    Victims, including a teller at one of the robbed banks, indicated that Mr. Walker
    had shaken their personal senses of security, and one victim specifically testified
    that he believed Mr. Walker needed to be incarcerated for some period of time.
    Two law enforcement officers both testified about conversations that they had
    with Mr. Walker wherein he had admitted that he had robbed the banks due to
    financial difficulties.
    In addition to this evidence, the parties offered oral arguments for the
    sentences that they thought would be appropriate. The government again argued
    9
    that Mr. Walker should be sentenced to 120 months’ imprisonment, while Mr.
    Walker asserted that “five years of probation, a substantial period of home
    confinement, and community service” would be sufficient to satisfy the aims of
    sentencing. 
    Id. at 374–75.
    At the conclusion of the evidentiary hearing, the court
    decided to continue the hearing “[i]n order to adequately address the issues raised
    by the United States, as discussed in the [Walker I] decision, the factors raised by
    the defense and the . . . testimony of the witnesses and of Mr. Walker.” 
    Id. at 621.
    E
    Almost one month later, at the recommencement of the hearing, the district
    court provided the parties with a tentative sixty-one-page opinion, gave them
    about seventy-five minutes to digest it, and then again heard arguments from the
    parties. The tentative opinion indicated that the court would sentence “Mr.
    Walker to ten years of probation, with a mandatory review in five years, plus two
    years of home confinement, with case-appropriate monitoring and the standard
    exceptions, and 500 hours of community service.” 
    Id. at 377
    (Mem. Decision and
    Order on Resentencing, dated May 18, 2017). After both parties completed their
    arguments, the court overruled the government’s oral objections and made its
    tentative sentence final for the reasons stated in the opinion.
    This opinion started by concluding that, in Walker I, the Tenth Circuit had
    issued “a general remand for resentencing consistent with the opinion [in Walker
    10
    I].” 
    Id. at 355.
    This conclusion was based on the district court’s reading of the
    remand language at the end of the Walker I opinion, which did “not require
    imposition of a specific sentence or limit [the district] court to considering
    sentences only within the Guideline range.” 
    Id. Thus, the
    district court engaged
    in a de novo resentencing, aiming to “appropriately weigh the specific
    congressional values the Tenth Circuit identified, as well as all the 18 U.S.C.
    § 3553(a) factors, and craft a sentence that is consistent with sentencing
    objectives, the Tenth Circuit’s opinion, and other sentencing precedent.” 
    Id. After reciting
    the procedural background and evidence before it, the court
    engaged in a lengthy analysis of the § 3553(a) factors. With respect to
    § 3553(a)(1), the nature and circumstances of the crime and Mr. Walker’s history
    and characteristics, the district court concluded that Mr. Walker was a different
    individual post-rehabilitation and that this had been demonstrated by his success
    while on probation. See, e.g., R. at 381–83 (“The most striking theme discernable
    from all of the evidence on resentencing is that there are two John Walkers: the
    old and the new.”). This conclusion was supported by the testimony of Mr.
    Walker’s counselor, who testified that Mr. Walker had been “rehabilitated,” 
    id. at 360–61,
    and the Probation Officer, who opined that he did not “think a custody
    sentence would be beneficial in Mr. Walker’s case,” 
    id. at 540–41.
    While the
    court acknowledged that “[t]he nature of the offense and Mr. Walker’s criminal
    history weigh[ed] strongly toward incarceration,” 
    id. at 410,
    it added that “the
    11
    extraordinary circumstances of Mr. Walker’s current characteristics and
    rehabilitation” both counseled against incarceration. 
    Id. at 411.
    Section 3553(a)(2)(A) required the court to consider the need for the
    sentence to reflect the seriousness of the offense, to promote respect for the law,
    and to provide just punishment for the offense. The district court determined that
    the seriousness of the offense and need for just punishment weighed in favor of
    incarceration, although “less so than in other cases because Mr. Walker’s lifelong
    addiction mitigates the underlying purpose of retribution.” R. at 410. But the
    court ultimately found that incarceration would not “promote respect for the law
    in light of Mr. Walker’s significant recovery efforts.” 
    Id. at 410–11.
    In
    particular, the court agreed with Mr. Walker that, while his use of drugs had led
    him to crime, he was now sober and unlikely to relapse.
    With respect to § 3553(a)(2)(B)—i.e., the need to provide adequate
    deterrence—the court concluded that Mr. Walker’s rehabilitation made
    imprisonment unnecessary to specifically deter Mr. Walker, as he was unlikely to
    reoffend. With respect to general deterrence, the court cited social science
    studies indicating that probation was just as effective as imprisonment in
    providing deterrence. The court also reasoned that general deterrence may be
    more important with respect to certain crimes—identifying white-collar crimes in
    particular—than the type of crime at issue here, i.e., bank robbery. While the
    court did “not doubt that incarceration has some general deterrent effect,” 
    id. at 12
    395, it found that, in this case, “the evidence is, at best, inconclusive as to
    whether a lengthy term of imprisonment . . . would provide any deterrent effect,”
    
    id. at 397.
    With respect to § 3553(a)(2)(C), the need to protect the public, and
    § 3553(a)(2)(D), the need for rehabilitation, the court concluded that further
    incarceration would likely harm Mr. Walker’s recovery and increase the
    likelihood of him reoffending. Specifically, the court found it more likely than
    not that Mr. Walker would relapse into substance abuse and subsequently be led
    back into crime if he was removed from his support systems. This conclusion was
    again supported by the testimony of Mr. Walker’s Probation Officer, who testified
    that he did not “think a custody sentence would be beneficial in Mr. Walker’s
    case” because of the “positive changes” that Mr. Walker had made in his life. R.
    at 540–41. Likewise, Mr. Walker’s counselor testified that removing Mr. Walker
    from his support system would “absolutely have a negative effect on him.” 
    Id. at 370.
    Finally, with respect to the sentencing range established by the Guidelines
    and the need to avoid unwarranted sentencing disparities, see § 3553(a)(4), (6),
    the court recognized that its proposed sentence continued to create a disparity
    with other offenders sentenced for like crimes under the Guidelines but went to
    great lengths to explicate why that disparity was warranted in light of Mr.
    Walker’s rehabilitation. In particular, the court noted that Friedman, which we
    13
    had discussed extensively in Walker I, had “expressed concern at the lack of any
    explanation by the district court” for why it had imposed such a significant
    variance from the Guidelines range. R. at 407. The district court concluded,
    however, that “Mr. Walker’s case departs from Friedman based on the extensive
    record created here,” including “Mr. Walker’s exceptional recovery and conduct
    on four years of supervised release.” 
    Id. at 408.
    More specifically, while bank
    robbery convictions frequently lead to higher sentences, including the sentence in
    Friedman that we discussed in Walker I, the court relied on evidence that Mr.
    Walker had “move[d] past his addiction,” “already succeeded on pretrial and
    postsentence supervised release,” and had “shown remorse,” to conclude that
    there were “more than adequate grounds in this record to justify the disparity.”
    R. at 409.
    “Overall,” the district court concluded, “the balance of sentencing factors
    weighs toward a substantial variance from the Guideline range and toward a non-
    custody sentence in this case.” 
    Id. at 410.
    Thus, the district court imposed its
    sentence of ten years of probation, two years of home confinement, and 500 hours
    of community service.
    The government appealed.
    II
    The government raises two arguments against the district court’s revised
    sentence. It argues (1) that the district court violated Walker I’s mandate when it
    14
    declined to sentence Mr. Walker to a prison term; 4 and (2) that, even if the district
    court’s sentence did not run afoul of our mandate in Walker I, the sentence is
    nevertheless substantively unreasonable. We reject the government’s first
    argument on the merits and find the second waived due to the government’s
    inadequate briefing. Accordingly, we affirm the district court’s sentencing order.
    A
    We first address the government’s primary contention: that the district
    4
    The government frames the first issue on appeal as:
    Whether a sentence of no additional incarceration was
    substantively unreasonable for a serial bank robber whose career
    offender Guidelines range was 151–188 months, where this Court
    held in an earlier appeal that a sentence of no incarceration
    beyond 33 days of time served was unreasonable because it was
    too short.
    Aplt.’s Opening Br. at 1–2. The two arguments explicated in the above text are
    distinct aspects of the government’s appellate challenge. First, as the government
    made clear in its reply brief, it contends that the district court’s sentence was
    substantively unreasonable because it failed to adhere to our mandate. See
    Aplt.’s Reply Br. at 3 n.1 (“[T]he district court abused its discretion by
    ‘ignor[ing] this Court’s holding that a no-prison sentence for Walker was
    substantively unreasonable.’ While the government may not have used the word
    ‘mandate,’ its brief makes absolutely clear the substance of its argument: the
    district court exceeded the bounds of ‘permissible choice’ set by this Court in
    Walker I.” (quoting Aplt.’s Opening Br. at 17)). We view this first argument as
    distinct from its second argument, that the district court’s sentence was
    substantively unreasonable on its own terms. See Aplt.’s Reply Br. at 10 n.2
    (“[E]ven if the mandate were not so limited, the district court abused its
    discretion because a sentence with no additional term of imprisonment was
    substantively unreasonable. As the government argues in its opening brief, the
    sentencing factors in § 3553(a) render a sentence with no term of imprisonment
    substantively unreasonable.”).
    15
    court violated Walker I’s mandate when it declined to sentence Mr. Walker to a
    prison term. We reject this argument, agreeing with Mr. Walker that Walker I’s
    mandate was general and did not require the district court to impose a sentence of
    imprisonment. In the following discussion, we (1) lay out how the mandate rule
    applies in this circuit, and (2) examine the scope of Walker I’s mandate and
    analyze whether the district court violated that mandate by declining to sentence
    Mr. Walker to a prison term.
    1
    When we vacate and remand for resentencing, “the mandate rule controls.”
    United States v. West (“West II”), 
    646 F.3d 745
    , 748 (10th Cir. 2011). The
    mandate rule, recognized by the Supreme Court since “its earliest days,” states
    “that an inferior court has no power or authority to deviate from the mandate
    issued by an appellate court.” Briggs v. Pa. R.R. Co., 
    334 U.S. 304
    , 306 (1948);
    accord United States v. Shipp (“Shipp II”), 
    644 F.3d 1126
    , 1129 (10th Cir. 2011)
    (“The mandate rule is a discretion-guiding rule that generally requires trial court
    conformity with the articulated appellate remand.” (quoting United States v.
    Keifer, 
    198 F.3d 798
    , 801 (10th Cir. 1999))). In the criminal sentencing context,
    the rule also finds statutory support in 18 U.S.C. § 3742(g), which provides that
    “[a] district court to which a case is remanded . . . shall resentence a defendant in
    accordance with section 3553 and with such instructions as may have been given
    by the court of appeals.” 18 U.S.C. § 3742(g), (g)(1) (emphasis added); see West
    16
    
    II, 646 F.3d at 748
    (drawing connection between § 3742(g) and mandate rule).
    “Not surprisingly, ‘[t]o decide whether the district court violated [our]
    mandate, it is necessary to examine the mandate and then look at what the district
    court did.’” Procter & Gamble Co. v. Haugen, 
    317 F.3d 1121
    , 1126 (10th Cir.
    2003) (alterations in original) (quoting Hicks v. Gates Rubber Co., 
    928 F.2d 966
    ,
    969 (10th Cir. 1991)). “The mandate consists of our instructions to the district
    court at the conclusion of the opinion, and the entire opinion that preceded those
    instructions.” Id.; see Shipp 
    II, 644 F.3d at 1129
    (“The district court may
    consider the opinion to determine the intent of the mandate.” (collecting cases));
    see also F ED . R. A PP . P. 41(a) (“Unless the court directs that a formal mandate
    issue, the mandate consists of a certified copy of the judgment, a copy of the
    court’s opinion, if any, and any direction about costs.”).
    In interpreting the scope of a previous mandate, we look for specific
    limitations on the district court’s discretion. “[T]he scope of the mandate on
    remand in the Tenth Circuit is carved out by exclusion: unless the district court’s
    discretion is specifically cabined, it may exercise discretion on what may be
    heard.” West 
    II, 646 F.3d at 749
    . Put differently, “where the appellate court has
    not specifically limited the scope of the remand, the district court generally has
    discretion to expand the resentencing beyond the sentencing error causing the
    reversal.” 
    Id. at 748
    (quoting United States v. Moore, 
    83 F.3d 1231
    , 1234 (10th
    Cir. 1996)); accord 
    id. at 749
    (“[T]he district court is to look to the mandate for
    17
    any limitations on the scope of the remand and, in the absence of such limitations,
    exercise discretion in determining the appropriate scope.”). “This approach has
    been characterized . . . as a presumption in favor of a general remand.” Dish
    Network Corp. v. Arrowood Indem. Co., 
    772 F.3d 856
    , 864 (10th Cir. 2014)
    (omission in original) (quoting West 
    II, 646 F.3d at 749
    ).
    If there are no specific limitations, therefore, the district court may review
    “any relevant evidence the court could have heard at the first sentencing hearing.”
    
    Moore, 83 F.3d at 1234
    (quoting United States v. Ortiz, 
    25 F.3d 934
    , 935 (10th
    Cir. 1994)). Evidence may be presented “even on issues that were not the specific
    subject of the remand.” 
    Keifer, 198 F.3d at 801
    (quoting 
    Moore, 83 F.3d at 1234
    ). After receiving any new evidence, the district court “may impose any
    reasonable sentence, within or without the Guidelines, consistent with the
    considerable range of discretion afforded to it.” United States v. Todd, 
    515 F.3d 1128
    , 1139 (10th Cir. 2008).
    We review the district court’s interpretation of our mandate de novo, Shipp
    
    II, 644 F.3d at 1129
    , and then ask whether the court abused the measure of
    discretion that our mandate left to it, Procter & 
    Gamble, 317 F.3d at 1125
    .
    2
    The parties dispute the scope of Walker I’s remand, and specifically
    whether Walker I required the district court to sentence Mr. Walker to a term of
    imprisonment. We look first at the “remand language” found at the conclusion of
    
    18 Walker I
    before considering the opinion as a whole. We conclude that, while
    Walker I’s language certainly could be reasonably understood as sending a
    message to the district court that it would be appropriate to impose a harsher
    sentence on Mr. Walker on remand, this language did not sufficiently restrict the
    district court’s discretion such that it was obliged to sentence him to a term of
    imprisonment.
    a
    In our examination of the mandate, we start with the “remand language”
    found in Walker I’s concluding paragraphs. Dish 
    Network, 772 F.3d at 865
    –66;
    see Shipp 
    II, 644 F.3d at 1129
    (“We start with the mandate language standing
    alone . . . .”). In that language, we stated:
    We conclude that 33 days in pretrial detention constitutes an
    unreasonably short sentence. For admittedly robbing two banks
    as an armed career offender, Mr. Walker would avoid any
    punishment and the sentence would give little or no weight to the
    congressional values of punishment, general deterrence,
    incapacitation, respect for the law, and avoidance of unwarranted
    sentence disparities. In these circumstances, we regard the
    sentence as substantively unreasonable.
    Reversed and remanded for resentencing consistent with this
    opinion.
    Walker 
    I, 844 F.3d at 1259
    –60.
    A plain reading of this language establishes that we did not specifically
    require the district court to sentence Mr. Walker to a prison term on remand. To
    be sure, we did hold that “33 days in pretrial detention constitutes an
    19
    unreasonably short sentence”—that is, a time-served sentence of no more than
    thirty-three days (followed by supervised release). 
    Id. But we
    did not direct that
    a sentence of incarceration, in contrast to a sentence of extended home
    confinement like the one that the district court imposed, was required following
    remand. More fundamentally, the remand language focused on the district court’s
    failure to fashion a sentence that respected the sentencing factors of § 3553(a). In
    other words, our remand language ordered the district court to give serious
    consideration to the § 3553(a) factors and to impose a sentence that took all those
    factors into account, but we did not specifically limit the district court’s
    discretion in molding a sentence on remand. See West 
    II, 646 F.3d at 748
    –49.
    This point is underscored by comparing and contrasting this remand language to
    the remand language found in our prior decisions where we determined either that
    the language did not impose restrictions on the district court’s sentencing
    discretion or that the language did in fact cabin the court’s discretion. It should
    become pellucid that the remand language here is akin to the language in the
    former situation, i.e., where the sentencing court’s discretion was not specifically
    constrained.
    In United States v. West (“West I”), 
    550 F.3d 952
    (10th Cir. 2008), for
    example, we remanded for resentencing in light of a district court’s failure to
    make factual findings in response to objections to the PSR. See 
    id. at 955,
    partially overruled on other grounds by Chambers v. United States, 
    555 U.S. 122
    20
    (2009), as recognized by United States v. Shipp (“Shipp I”), 
    589 F.3d 1084
    , 1090
    n.3 (10th Cir. 2009). There, in our remand language, we stated:
    For these reasons, we are compelled to REMAND this case,
    directing the district court to resolve the factual disputes West
    raised or explain why it is unnecessary for sentencing purposes
    to do so. If the district court determines that the Government did
    not prove the disputed facts by a preponderance of the evidence,
    the district court should then conduct a new sentencing
    proceeding, excluding those disputed and unproven factual
    allegations.
    ...
    We REMAND for the district court to conduct proceedings
    consistent with this decision.
    
    Id. at 975
    (footnote omitted). On remand, the district court heard arguments
    concerning the factual disputes referenced in West I but concluded that the
    mandate prevented it from considering a newly raised argument about restitution
    imposed at the original sentencing. See West 
    II, 646 F.3d at 747
    (summarizing
    resentencing proceedings). In West II, we held that West I’s remand language did
    not prevent the district court from considering the new argument about restitution:
    “[T]he district court erred when it determined that it lacked authority to
    reconsider the restitution obligation; the district court had discretion to consider
    the 
    issue.” 646 F.3d at 750
    . The district court had discretion to reach the
    restitution argument in particular because “the default in this circuit is de novo
    resentencing,” and the language in West I did not specifically command a
    different course—viz., one limiting the court’s sentencing discretion such that it
    21
    could not consider the restitution issue. 
    Id. We reached
    a similar conclusion regarding our remand language in United
    States v. Lang (“Lang I”), 
    364 F.3d 1210
    (10th Cir. 2004), cert. granted,
    judgment vacated on other grounds, 
    543 U.S. 1108
    (2005), and opinion reinstated
    in part on other grounds, United States v. Lang (“Lang II”), 
    405 F.3d 1060
    , 1061
    (10th Cir. 2005). There, we determined that the district court erroneously
    departed downward from the Guidelines. Lang 
    I, 364 F.3d at 1214
    –16. The
    relevant language stated:
    Based on the foregoing, we REVERSE the district court’s
    downward departures for both Langs, remanding both cases for
    resentencing pursuant to 18 U.S.C. § 3742(f)(2)(B), and AFFIRM
    the decision of the district court on the remaining issues.
    
    Id. at 1224.
    During resentencing, the defendants raised a new constitutional
    argument that their sentences could not be based on judicial findings that
    increased their punishment. Lang 
    II, 405 F.3d at 1063
    (summarizing district court
    proceedings). Notwithstanding the language affirming the district court “on the
    remaining issues,” we had no trouble concluding that Lang I’s “general mandate
    does not contain the type of specificity necessary to limit a district court’s
    authority to resentence on remand.” 
    Id. at 1064.
    The absence of language
    “specifically limiting the scope of remand” permitted the district court to reach
    the new constitutional argument. 
    Id. However, we
    reached a contrary conclusion regarding the remand language
    22
    in United States v. Webb (“Webb I”), 
    49 F.3d 636
    (10th Cir. 1995), abrogated in
    part by United States v. Booker, 
    543 U.S. 220
    (2005). There, we also remanded
    after concluding that the district court erred in its downward departure from the
    Guidelines. 
    Id. at 637.
    Our opinion concluded:
    For the aforementioned reasons, we find the justifications cited
    by the district court insufficient to set this case outside the
    “heartland” contemplated by the Sentencing Guidelines. The
    decision of the district court to depart from the applicable
    guideline range is therefore REVERSED.            The case is
    REMANDED for resentencing within the prescribed range of
    twenty-seven to thirty-three months 
    imprisonment. 49 F.3d at 640
    (emphasis added and bold-face font omitted). “At the time of
    resentencing, defendant asked the district court to depart downward from the
    guideline range, based on a combination of three factors”; “[n]otably, these were
    the same factors relied upon by the district court in departing downward at the
    time of the original sentencing.” United States v. Webb (“Webb II”), 
    98 F.3d 585
    ,
    587 (10th Cir. 1996). The district court declined the defendant’s request,
    reasoning that it did not have the discretion to grant such relief. See 
    id. We upheld
    the court’s decision, “conclud[ing] the mandate rule prohibited the district
    court from departing downward from the guideline range enunciated.” 
    Id. In particular,
    we determined that Webb I’s mandate language had “specifically
    limited” the district court’s sentencing discretion on remand because “the Webb I
    panel specifically instructed the district court to resentence [the] defendant within
    the guideline range of 27–33 months.” 
    Id. at 587–88.
    “Stated differently, the
    23
    mandate in Webb I directed the district court to do one thing on remand—impose
    a sentence within the 27- to 33-month range.” 
    Id. at 588.
    We have since stated
    that Webb I’s language “demonstrates the specificity that we require in order to
    limit a district court’s authority to resentence on remand.” United States v. Hicks,
    
    146 F.3d 1198
    , 1201 (10th Cir. 1998).
    Unlike Webb I, Walker I’s remand language did not require that the district
    court reach a particular sentencing outcome. It did not, for example, specify that
    the court should impose a sentence within a particular Guidelines range,
    nor—more importantly, for present purposes—did it expressly require the district
    court to sentence Mr. Walker to a prison term. See Webb 
    I, 49 F.3d at 640
    ; cf.
    United States v. Zander, 705 F. App’x 707, 710 (10th Cir. 2017) (unpublished)
    (“Our prior remand directed the district court to resentence Zander ‘in accordance
    with [a] corrected loss calculation’ within the $120,000 to $200,000 range. Thus,
    the district court correctly ruled that the sentencing guideline calculation issues
    Zander attempted to raise went beyond the limited scope of its mandate.”
    (citation omitted)). Instead, the Walker I remand language is akin to the remand
    language in Lang I and West I, which did not specifically restrict the sentencing
    courts’ discretion to consider the new arguments that the defendants presented in
    resentencing proceedings. In particular, Walker I’s remand language merely
    constituted a general remand for resentencing, see Lang 
    I, 364 F.3d at 1224
    , and
    for “proceedings consistent with this decision,” West 
    I, 550 F.3d at 975
    . The
    24
    government does not cite any case law in which such general language has been
    found sufficient to limit a district court’s sentencing discretion in the same way
    that our specific language in Webb I did. Thus, we conclude that none of Walker
    I’s remand language “specifically cabined” the district court’s discretion such that
    it was required to impose a sentence of incarceration on Mr. Walker. West 
    II, 646 F.3d at 749
    .
    b
    We acknowledge, however, that the remand language “is read in light of
    our opinion that preceded” it, Shipp 
    II, 644 F.3d at 1129
    ; that is to say, it is our
    “entire opinion,” not just the remand language, that outlines the scope of the
    mandate. Procter & 
    Gamble, 317 F.3d at 1126
    ; see Shipp 
    II, 644 F.3d at 1129
    (“The district court may consider the opinion to determine the intent of the
    mandate.”). In this regard, we recognize that a reasonable reading of our Walker I
    opinion indicates that the panel believed that the district court’s original sentence
    was unreasonably short and that, therefore, a harsher sentence should be imposed
    on Mr. Walker on remand. See, 
    e.g., 844 F.3d at 1255
    (“In our view, this
    sentence was unreasonably short based on the statutory sentencing factors and our
    precedent. As a result, we reverse.”). Yet, we conclude that Walker I’s
    language—read as a whole—did not require the district court to sentence Mr.
    Walker to a prison term on remand. Under our caselaw, if that had been the
    Walker I panel’s intent, it would have spoken with greater specificity.
    25
    In support of its assertion that the mandate required a prison sentence on
    remand, the government points to three sets of statements in Walker I. First, the
    government points to our statement that “[t]he value of incapacitating Mr. Walker
    further supports incarceration of Mr. Walker.” Walker 
    I, 844 F.3d at 1258
    .
    However, incapacitation is only one of “the basic aims of sentencing” reflected in
    the § 3553(a) factors. Rita v. United States, 
    551 U.S. 338
    , 347–48 (2007); see
    Walker 
    I, 844 F.3d at 1256
    (citing 
    Rita, 551 U.S. at 347
    –48). And the Walker I
    court surely recognized that the sentencing court was obliged on remand “to
    consider” all of these aims in determining an appropriate sentence. 
    Rita, 551 U.S. at 347
    . Therefore, the Walker I panel would not have expected the district court
    to impose a prison term simply because it determined that incapacitation militated
    in favor of that result.
    Moreover, even with respect to the incapacitation factor, our value
    assessment in Walker I obviously was based on the then-existing record. And,
    notably, the language of that opinion did not specifically preclude the district
    court from considering new evidence on remand in determining (among other
    things) whether that value assessment regarding incapacitation continued to
    support a sentence of incarceration. In other words, in making its incapacitation
    value assessment on remand, the district court, under the express language of
    Walker I, was free to consider the comparatively more fulsome body of evidence
    available in the resentencing proceeding. See 
    Moore, 83 F.3d at 1234
    (citing
    26
    
    Ortiz, 25 F.3d at 934
    ). Among other things, this body of evidence concerned Mr.
    Walker’s self-motivated rehabilitation, including his sustained period of sobriety
    and the “positive changes” that he had made in his life. R. at 540–41. And, as
    the Supreme Court has recognized, a defendant’s “self-motivated rehabilitation”
    may “lend[] strong support to the conclusion that imprisonment [is] not necessary
    . . . to protect the public from his future criminal acts.” Gall v. United States, 
    552 U.S. 38
    , 59 (2007). Thus, as Gall contemplated, a sentencing court upon
    resentencing might reasonably conclude, after considering new evidence of
    rehabilitation, that the argument for an imprisonment sentence had been
    significantly weakened since the first sentencing. Consequently, the district court
    here would have been quite correct in not reading this first statement the
    government identified from Walker I as obliging it to sentence Mr. Walker to a
    prison term in order to vindicate the sentencing aim of incapacitation.
    Second, the government points to the following statement about Friedman:
    “If the 57 months of incarceration in Friedman was an unreasonably light
    sentence, Mr. Walker’s 33 days in pretrial detention was also unreasonably light.”
    Walker 
    I, 844 F.3d at 1259
    ; see also 
    id. (“Mr. Walker’s
    33 days in pretrial
    detention involved less than 2% of the prison time meted out to the Friedman
    defendant.”). There is nothing, however, in this Friedman-related language that
    indicates that the district court was obliged to impose a prison term on Mr.
    Walker.
    27
    Third, as the government notes, the Walker I panel stated that “by declining
    to impose any prison time, the district court effectively failed to give any weight
    to the congressional values of punishment, general deterrence, incapacitation,
    respect for the law, and avoidance of unwarranted sentencing disparities.” Walker
    
    I, 844 F.3d at 1259
    . Though this statement does suggest a causal relationship
    between the lack of prison time and our conclusion in Walker I that the district
    court failed to give any weight to congressionally defined sentencing factors, it
    simply does not amount to a sufficiently clear statement to the district court that
    only the imposition of a prison term on Mr. Walker on remand would indicate that
    the court properly accorded weight to the § 3553(a) factors that the Walker I
    panel identified. Indeed, it is improbable that the Walker I panel intended for its
    comments at issue here to be interpreted in this way because the panel did not
    expressly preclude the district court from considering new evidence that might
    impact the sentencing calculus with respect to all of the § 3553(a) factors. See
    Pepper v. United States, 
    562 U.S. 476
    , 490 (2011) (“[W]e think it clear that when
    a defendant’s sentence has been set aside on appeal and his case remanded for
    resentencing, a district court may consider evidence of a defendant’s
    rehabilitation since his prior sentencing and that such evidence may, in
    appropriate cases, support a downward variance from the advisory Guidelines
    range.”); 
    id. at 491
    (noting that intervening “evidence of postsentencing
    rehabilitation” “may be highly relevant to several of the § 3553(a) factors”).
    28
    Accordingly, the government fares no better in relying on this third statement of
    Walker I.
    Our conclusion that these statements—focusing on them individually—do
    not amount to sufficiently specific directives to the district court to impose a
    prison term on Mr. Walker on remand is only reinforced by viewing the
    statements in the context of other language that the Walker I panel used. In
    particular, in Walker I, we repeatedly restated our narrow holding that the specific
    time-served sentence that the district court imposed on Mr. Walker was
    substantively unreasonable, without expressly indicating what sentence or
    sentencing range would be reasonable; particularly, we did not say that only a
    sentence of imprisonment would be reasonable. See Walker 
    I, 844 F.3d at 1255
    (“In our view, this sentence was unreasonably short based on the statutory
    sentencing factors and our precedent. As a result, we reverse.”); 
    id. at 12
    56 (“We
    conclude that the sentence of time served, 33 days in pretrial detention, was
    unreasonably short.”); 
    id. at 12
    58 (“The district court could vary downward, but
    here it varied down all the way to time served . . . . [The Guidelines range]
    weighs against a time-served sentence.”).
    Likewise, we elsewhere focused on the district court’s failure to accord
    proper weight to relevant sentencing factors without opining on what sentencing
    outcomes would necessarily be the fruit of the court’s proper weighing of these
    29
    factors. See 
    id. at 12
    58 (“The district court gave inadequate attention to [general
    deterrence].”); 
    id. (“But [the
    value of incapacitation] was never mentioned at the
    sentencing.”). Critically, the foregoing Walker I statements pointed out the
    problems with the district court’s sentencing analysis but did not indicate that a
    proper sentencing analysis would ineluctably result in the district court imposing
    a term of imprisonment on Mr. Walker.
    Thus, especially when viewed in the broader context of other language in
    the Walker I opinion, we cannot conclude that the statements that the government
    points us to specifically limited or cabined the district court’s discretion by
    requiring it to impose a sentence of incarceration on Mr. Walker. Dish 
    Network, 772 F.3d at 864
    (citing West 
    II, 646 F.3d at 748
    –49); accord United States v.
    Brown, 212 F. App’x 747, 751 (10th Cir. 2007) (unpublished) (“A review of our
    case law shows that we require quite a high level of specificity to limit a remand
    on resentencing.”). Our view of this matter is fully congruent with our
    “presumption in favor of a general remand.” Dish 
    Network, 772 F.3d at 864
    .
    As noted, we do not doubt that a reasonable reading of our Walker I
    opinion indicates that the panel believed that the district court’s original sentence
    was unreasonably short and that, therefore, a harsher sentence should be imposed
    on Mr. Walker on remand. However, the message that a harsher sentence would
    be appropriate on remand could be implemented in many different ways, and the
    30
    district court did in fact impose a comparatively harsher sentence on Mr. Walker.
    Recall that the district court increased Mr. Walker’s probationary period from
    three years to ten years, added two years of home confinement, and five hundred
    hours of community service. Compare R. at 352 (detailing original sentence),
    with 
    id. at 377
    (detailing sentence after remand). In particular, the imposition of
    the two years of home confinement certainly increased the severity of Mr.
    Walker’s punishment; home confinement itself functions as an alternative to a
    period of incarceration in prison. See U.S.S.G. § 5C1.1(e)(3) (providing, under
    its “Schedule of Substitute Punishments,” that “[o]ne day of home detention [is
    substituted] for one day of imprisonment”); accord United States v. Thomas, 
    68 F.3d 392
    , 393 (10th Cir. 1995); see also United States v. Rausch, 
    570 F. Supp. 2d 1295
    , 1307 (D. Colo. 2008) (“Home detention and home incarceration are to be
    used only as alternatives to imprisonment.”). While the government bemoans that
    the home confinement was “exception-riddled,” Aplt.’s Opening Br. at 18, the
    district court appears to have simply imposed the “standard exceptions,” R. at
    377, leading us to conclude that the home confinement led to a harsher sentence.
    Furthermore, we and the Supreme Court have consistently held that
    probation is not insignificant punishment. See 
    Gall, 552 U.S. at 48
    (“We
    recognize that custodial sentences are qualitatively more severe than probationary
    sentences of equivalent terms. Offenders on probation are nonetheless subject to
    31
    several standard conditions that substantially restrict their liberty.”); accord
    United States v. Knights, 
    534 U.S. 112
    , 119 (2001); Frank v. United States, 
    395 U.S. 147
    , 151 (1969); see United States v. Ortiz, 
    733 F.2d 1416
    , 1417 (10th Cir.
    1984) (per curiam). Consequently, the increased term of probation also enhanced
    the severity of Mr. Walker’s sentence.
    Thus, it is clear to us that, insofar as Walker I’s language did in fact send a
    message to the district court that it would be appropriate to impose a harsher
    sentence on Mr. Walker on remand, the court did in fact abide by that message. 5
    But, for reasons explicated above, we believe that Walker I’s mandate did not—in
    the fashion of Webb I—sufficiently restrict the district court’s discretion such that
    it was obliged to sentence Mr. Walker to a prison term. Cf. Dish 
    Network, 772 F.3d at 866
    (“The important point is that nothing in the remand language in DISH
    I specifically limited or prevented the district court from allowing the Insurers to
    dispute the purported duty to defend on grounds other than those that were
    asserted in the Insurers’ original motions for summary judgment. As a result, the
    district court did not violate the mandate rule by allowing the Insurers to file new
    motions for summary judgment raising additional defenses to the purported duty
    5
    We pause to underscore that we are not reaching the question here of
    whether the district court’s harsher sentence was harsh enough in light of the
    § 3553(a) factors. That is a question of substantive reasonableness. And, for the
    reasons explained infra, the government has waived our consideration of that
    question.
    32
    to defend.”). Therefore, we reject the government’s first contention of
    error—viz., its argument that the district court violated Walker I’s mandate when
    it declined to sentence Mr. Walker to a prison term.
    B
    We now turn to the government’s purported second challenge on appeal,
    i.e., whether the district court’s sentence after remand is substantively reasonable
    under the rubric of the § 3553(a) factors. The government, in a cursory manner,
    asserts that we should vacate and remand Mr. Walker’s sentence because it
    remains unreasonable independent of the scope-of-the-mandate issue. Mr.
    Walker, however, asserts that the government waived this secondary argument
    based on its inadequate briefing. For the reasons stated below, we agree with Mr.
    Walker; the government’s backup argument is waived. We thus decline to reach
    its merits.
    1
    Our preservation rules are part of the “winnowing process” of litigation that
    permits a court to “narrow what remains to be decided.” Exxon Shipping Co. v.
    Baker, 
    554 U.S. 471
    , 487 n.6 (2008) (quoting Poliquin v. Garden Way, Inc., 
    989 F.2d 527
    , 531 (1st Cir. 1993)); see also Richison v. Ernest Grp., Inc., 
    634 F.3d 1123
    , 1128 (10th Cir. 2011). Ordinarily, a party’s failure to address an issue in
    its opening brief results in that issue being deemed waived. And, ordinarily, we
    33
    will decline to reach the merits of waived issues. See Wyoming v. Livingston, 
    443 F.3d 1211
    , 1216 (10th Cir. 2006) (“Wyoming did not address this issue in its
    opening appellate brief. The issue is therefore waived.”); accord LifeWise Master
    Funding v. Telebank, 
    374 F.3d 917
    , 927 n.10 (10th Cir. 2004). This briefing-
    waiver rule applies equally to arguments that are “inadequately presented” in an
    opening brief. Bronson v. Swensen, 
    500 F.3d 1099
    , 1104 (10th Cir. 2007)
    (“Consistent with this requirement, we routinely have declined to consider
    arguments that are not raised, or are inadequately presented, in an appellant’s
    opening brief.” (emphasis added)); see United States v. Kunzman, 
    54 F.3d 1522
    ,
    1534 (10th Cir. 1995) (declining to address arguments that were “nominally
    raised in the Appellant’s Brief”). More specifically, arguments may be deemed
    waived when they are advanced in an opening brief only “in a perfunctory
    manner.” United States v. Wooten, 
    377 F.3d 1134
    , 1145 (10th Cir. 2004) (quoting
    Murrell v. Shalala, 
    43 F.3d 1388
    , 1390 n.2 (10th Cir. 1994)); accord Gray v.
    Univ. of Colo. Hosp. Auth., 
    672 F.3d 909
    , 915 (10th Cir. 2012).
    2
    Under the foregoing principles, we conclude that the government has
    waived its challenge to the substantive reasonableness of the district court’s
    sentence through inadequate briefing.
    First, we deem it significant that the government’s own framing of its
    34
    argument reveals that, in effect, its sole appellate challenge relates to the scope-
    of-the-mandate issue. Specifically, when given an opportunity in its reply brief to
    clarify the essential scope of its appellate argument, the government spoke only of
    the scope-of-the-mandate issue—viz., its argument that the district court’s erred in
    disregarding our mandate in Walker I. In this regard, after noting that Mr. Walker
    “fault[ed] the government for offering no analysis of the Court’s mandate or the
    district court’s decision on resentencing,” the government tellingly replied that its
    opening brief “clearly set forth its argument on appeal: the district court abused
    its discretion by ‘ignor[ing] this Court’s holding that a no-prison sentence for
    Walker was substantively unreasonable.’” Aplt.’s Reply Br. at 3 n.1 (emphasis
    added) (quoting Aplt.’s Opening Br. at 17). The government further maintained
    in reply that “its brief makes absolutely clear the substance of its argument: the
    district court exceeded the bounds of ‘permissible choice’ set by this Court in
    Walker I.” 
    Id. And it
    reasoned that because “this Court’s decision in Walker I
    limited the discretion of the district court to consider de novo whether the
    sentencing factors supported a sentence of incarceration,” “[i]t was thus
    unnecessary for the government to address in detail the district court’s de novo
    sentencing analysis.” 
    Id. (emphasis added).
    Thus, when given a chance in its reply brief to frame the essence of its
    appellate argument, the government spoke only of the scope-of-the-mandate issue.
    35
    The government clearly indicates in its reply brief that it made the strategic
    decision to elide any detailed discussion of the court’s de novo sentencing
    analysis because such an analysis allegedly was not authorized by the Walker I
    mandate. Put another way, the government viewed its appellate challenge as
    turning on its scope-of-the-mandate argument to such an extent that the
    government deemed it “unnecessary . . . to address in detail” the district court’s
    post-remand sentencing analysis under the substantive-reasonableness rubric. 
    Id. Through its
    own words, therefore, we see that the government effectively
    disclaimed the need to address in any meaningful way the substance of the district
    court’s analysis of the § 3553(a) factors.
    And the government’s skeletal briefing regarding the district court’s
    sentencing analysis indicates that it acted on its declared framing of the case. As
    a consequence, the government has effectively waived any challenge to the
    substantive reasonableness of the district court’s sentence (i.e., its weighing of
    the § 3553(a) factors).
    More specifically, a review of the government’s briefing demonstrates a
    lack of meaningful interaction with the district court’s § 3553(a) analysis. The
    district court authored a sixty-one-page opinion in support of its findings,
    spending multiple pages on numerous factors to establish the purported
    reasonableness of its sentence. See, e.g., R. at 380–83 (discussing the offense and
    36
    Mr. Walker’s characteristics); 
    id. at 383–98
    (reviewing § 3553(a)(2) factors); 
    id. at 402–09
    (discussing the need to avoid unwarranted sentencing disparities). In
    particular, the district court conducted an in-depth analysis of the various
    sentencing factors and made factual and legal findings with respect to each. Yet,
    despite the district court’s comprehensive analysis, the government has provided
    comparatively little in response. In its opening brief, the government’s analysis
    of the substantive reasonableness of the district court’s sentence runs
    approximately four pages. See Aplt.’s Opening Br. at 19–23. To be sure, whether
    a legal argument has been adequately presented cannot be determined solely by
    looking at the number of words devoted to it, but it would be illogical to say that
    this metric is meaningless. Yet, even more importantly here, the few words that
    the government expended on this topic consist of little more than generalized and
    conclusory statements, along with reiterations of its primary contention that the
    new sentence violates our mandate in Walker I. See, e.g., 
    id. at 21
    (noting, with
    regard to the need for just punishment, that “[t]his factor remained unchanged for
    resentencing, and the district court again abused its discretion by not giving it
    appropriate weight and imposing prison time”); 
    id. at 23
    (noting, with regard to
    consideration of the Guidelines, simply that “the court disregarded this heavy
    weight in favor of incarceration when it fashioned another no-prison sentence”).
    Along these lines, the government repeatedly juxtaposes the district court’s
    37
    conclusions regarding the § 3553(a) factors—which were based on extensive
    factual findings made following an evidentiary hearing and a fresh round of
    arguments by the parties on remand—with Walker I’s assessment of the legal
    import of these sentencing factors. The government then asserts conclusorily
    that the court erred by straying from Walker I. See, e.g., 
    id. at 20
    (“[T]he court
    erred by focusing almost exclusively on these recent developments [i.e., those
    following the initial sentencing]. The court also erred by over-valuing its theories
    about the role that addictions played in Walker’s psychological make-up and
    criminal culpability. This Court’s observations in Walker I apply with equal force
    to the district court’s resentencing . . . .”); 
    id. 21–22 (“The
    district court was not
    free simply to disregard this Court’s decision in Walker I and discount the
    sentencing goals of general deterrence and incapacitation.”). However, critically,
    the government essentially elides the fact that the district court’s § 3553(a)
    findings and legal conclusions were based on a different, more expansive,
    sentencing record than the one considered by the Walker I panel. And, more
    specifically, the government makes no attempt to engage with the district court’s
    reasoning and to explain why Walker I’s assessments of the § 3553(a) factors still
    should be deemed controlling notwithstanding the more developed sentencing
    record made following remand.
    Furthermore, arguments advanced for the first time in a litigant’s reply
    38
    brief will ordinarily not forestall a conclusion of waiver. See United States v.
    Harrell, 
    642 F.3d 907
    , 918 (10th Cir. 2011) (“[A]rguments raised for the first
    time in a reply brief are generally deemed waived.”); accord United States v.
    Smith, 
    606 F.3d 1270
    , 1284 n.5 (10th Cir. 2010). But even putting that principle
    aside would not avail the government. In its reply brief, the government directly
    advances an argument about substantive reasonableness only in a single footnote
    at the very end of the brief. See Aplt.’s Reply Br. at 10 n.2 (“[E]ven if the
    mandate were not so limited [as to prevent a sentence less than imprisonment], the
    district court abused its discretion because a sentence with no additional term of
    imprisonment is substantively unreasonable. As the government argues in its
    opening brief, the sentencing factors in § 3553(a) render a sentence with no term
    of imprisonment substantively unreasonable.”). And that argument is conclusory
    and perfunctory and does not engage with the district court’s comprehensive
    § 3553(a) analysis. Given that we have routinely declined to consider arguments
    that are only raised perfunctorily in footnotes, the government’s substantive-
    reasonableness argument in its reply brief (such that it is) cannot shake our
    conclusion of waiver. See United States v. Hardman, 
    297 F.3d 1116
    , 1131 (10th
    Cir. 2002) (en banc) (“Arguments raised in a perfunctory manner, such as in a
    footnote, are waived.”); accord In re C.W. Mining Co., 
    740 F.3d 548
    , 564 (10th
    Cir. 2014); see also United States v. Berry, 
    717 F.3d 823
    , 834 n.7 (10th Cir.
    39
    2013) (“We decline to address the issue because it is raised only in a footnote and
    was not raised in the district court.”).
    To be clear, whether issues should be deemed waived is a matter of
    discretion. See, e.g., Abernathy v. Wandes, 
    713 F.3d 538
    , 552 (10th Cir. 2013)
    (“[T]he decision regarding what issues are appropriate to entertain on appeal in
    instances of lack of preservation is discretionary.”). Thus, in exercising our
    discretion here to treat the government’s substantive-reasonableness argument as
    waived, we emphasize that the government’s inadequate briefing is particularly
    problematic because of the deferential, abuse-of-discretion standard of review that
    controls our consideration of the substantive reasonableness of sentences. More
    specifically, the district court enjoys wide discretion in crafting sentences that it
    deems appropriate for individual offenders, see 
    Gall, 552 U.S. at 51
    –52, and
    where the district court “root[s] its decision in specific, permissible facts,” we
    will generally affirm that sentence even if we would have weighed the facts
    differently ourselves, United States v. Barnes, 
    890 F.3d 910
    , 916, 920 (10th Cir.
    2018); see United States v. McComb, 
    519 F.3d 1049
    , 1053 (10th Cir. 2007)
    (“[T]here are perhaps few arenas where the range of rationally permissible
    choices is as large as it is in sentencing.”). In short, even under ordinary
    circumstances, winning “a substantive reasonableness appeal is no easy thing,”
    United States v. Fraser, 
    647 F.3d 1242
    , 1247 (10th Cir. 2011) (quoting United
    40
    States v. Rendon-Alamo, 
    621 F.3d 1307
    , 1310 n.** (10th Cir. 2010)).
    Viewed through the lens of this precedent, we are especially disinclined to
    consider reversing a district court’s sentence on substantive-reasonableness
    grounds unless the litigant provides us with meaningful arguments that challenge
    the district court’s reasoning. See, e.g., United States v. Brooks, 
    736 F.3d 921
    ,
    942 (10th Cir. 2013) (deeming criminal defendant’s “argument waived” where the
    defendant claimed the district court erred in enhancing his sentence by attributing
    certain drug quantities to him but provided “no citations to the record of the
    quantity of drugs” relevant to the enhancement). Put another way, given the
    considerable leeway afforded district courts in fashioning substantively
    reasonable sentences under the § 3553(a) factors, if a litigant wants us to find a
    sentence substantively unreasonable, it needs to articulate its challenge with
    particularity. Ordinarily, it would not be prudent for us to attempt to discern
    error in a district court’s reasoning under the § 3553(a) factors when the litigant’s
    challenge lacks such particularity. Cf. 
    Abernathy, 713 F.3d at 552
    (“[W]e are
    nevertheless reluctant to definitively opine on the merits of Mr. Abernathy’s
    Suspension Clause argument under de novo review, because the government has
    devoted very little time to addressing it, and, thus, we are deprived of the benefit
    of vigorous adversarial testing of the issue . . . .”). The government’s
    substantive-reasonableness arguments here are wanting on this basis of
    41
    particularity and are, more generally, inadequately briefed. Thus, we exercise our
    discretion under the waiver doctrine to decline to consider the government’s
    substantive-reasonableness challenge. Therefore, we uphold the district court’s
    sentencing order, without opining on the merits of the substantive-reasonableness
    question.
    III
    Because our mandate in Walker I did not specifically limit the district
    court’s discretion by requiring it to impose a sentence of imprisonment, we reject
    the government’s contention that the district court violated our mandate. Further,
    we do not express a view on the merits of whether the district court’s sentencing
    was substantively reasonable, as the government waived its argument on that
    point by failing to adequately address the district court’s analysis. Thus, we
    affirm the district court’s sentencing order and deny as moot the government’s
    request for reassignment on remand.
    42