United States v. Pamela Miller , 698 F.3d 248 ( 2012 )


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    Pursuant to Sixth Circuit Rule 206
    File Name: 12a0360p.06
    UNITED STATES COURT OF APPEALS
    FOR THE SIXTH CIRCUIT
    _________________
    X
    Plaintiff-Appellee (10-5264 & 10-5432), -
    UNITED STATES OF AMERICA,
    Plaintiff-Appellee/Cross-Appellant --
    (10-5877 & 10-6084), -
    No. 10-5264/5432/5877/6084
    ,
    >
    -
    -
    v.
    -
    -
    LESLIE R. BEALS (10-5264) and PAMELA R.
    -
    Defendants-Appellants, -
    MILLER (10-5432),
    -
    -
    -
    BOBBY AMBROSE,                                     -
    Defendant-Appellant/Cross-Appellee -
    (10-5877 & 10-6084). N
    Appeal from the United States District Court
    for the Eastern District of Tennessee at Greeneville.
    Nos. 2:08-cr-58; 2:08-cr-39—Robert Leon Jordan, District Judge.
    Argued: January 10, 2012
    Decided and Filed: October 16, 2012
    Before: SILER and GRIFFIN, Circuit Judges; and TARNOW, District Judge.*
    _________________
    COUNSEL
    ARGUED: D. R. Smith, LAW OFFICE OF D.R. SMITH, Johnson City, Tennessee, for
    Appellant/Cross-Appellee in 10-5877 and 10-6084. Caryn L. Hebets, UNITED
    STATES ATTORNEY’S OFFICE, Johnson City, Tennessee, for Appellee/Cross-
    Appellant in 10-5877 and 10-6084. ON BRIEF: James T. Bowman, Johnson City,
    Tennessee, for Appellant in 10-5264. Tracy Jackson Smith, LAW OFFICE OF TRACY
    JACKSON SMITH, Knoxville, Tennessee, for Appellant in 10-5432. D. R. Smith,
    LAW OFFICE OF D.R. SMITH, Johnson City, Tennessee, for Appellant/Cross-Appellee
    in cases 10-5877 and 10-6084. Caryn L. Hebets, UNITED STATES ATTORNEY’S
    *
    The Honorable Arthur J. Tarnow, Senior United States District Judge for the Eastern District of
    Michigan, sitting by designation.
    1
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    OFFICE, Johnson City, Tennessee, for Appellee in 10-5264 and 10-5432 and for
    Appellee/Cross-Appellant in 10-5877 and 10-6084.
    GRIFFIN, J., delivered the opinion of the court, in which SILER, J., joined.
    TARNOW, D. J., joined the opinion of the court regarding Beals and Ambrose; and
    concurred in the judgment only regarding Miller. TARNOW, D. J. (pp. 33–35),
    delivered a separate concurring opinion with regard to appeal 10-5432.
    _________________
    OPINION
    _________________
    GRIFFIN, Circuit Judge. These four consolidated appeals involve an alleged
    methamphetamine manufacturing and distribution conspiracy in eastern Tennessee that
    involved forty-nine indicted defendants. See 
    21 U.S.C. §§ 841
    (a), 846. Defendant
    Pamela Miller pleaded guilty and now challenges her sentence. (Appeal No. 10–5432)
    The government contends that Miller promised not to appeal her sentence as part of her
    agreement to plead guilty. It moves to dismiss her appeal. Defendants Leslie Beals and
    Bobby Ambrose chose to go to trial, and a jury convicted them as charged. Beals
    appeals his convictions on the ground that the evidence was insufficient. (Appeal No.
    10–5264) Ambrose challenges some of his convictions on the same ground and also
    claims error in the district court’s denials of his pretrial suppression motion and mid-trial
    request for the government to disclose the identity of a confidential informant. (Appeal
    No. 10–5877) Finally, the government cross-appeals Ambrose’s sentence, claiming the
    Supreme Court’s intervening decision in Abbott v. United States, 
    131 S. Ct. 18
     (2010),
    renders it unlawful. (Appeal No. 10–6084)
    For the following reasons, we dismiss Miller’s appeal as waived, affirm Beals’s
    convictions, vacate Ambrose’s sentence, and remand Ambrose’s case for further
    factfinding and resentencing. We address the appeals separately.
    No. 10-5264/5432/5877/6084        United States v. Beals, et al.                  Page 3
    I. Miller’s Appeal (No. 10–5432)
    A.
    The government charged Pamela Miller with conspiracy to manufacture 50 or
    more grams of methamphetamine and 500 or more grams of a mixture or substance
    containing methamphetamine, as well as possession of equipment used to manufacture
    methamphetamine. She agreed to plead to the lesser included offense of conspiracy to
    manufacture 50 or more grams of a mixture or substance containing methamphetamine
    in exchange for the government’s promise to dismiss the possession charge.
    As part of her plea agreement, Miller stipulated that she conspired to
    “manufacture approximately 80.43 grams of a mixture and substance containing a
    detectable amount of methamphetamine, . . . and that [she] purchased 146.25 grams of
    pseudoephedrine which [she] provided to other co-conspirators to manufacture
    methamphetamine.” The plea agreement states that “this quantity of pseudoephedrine
    converts to 1,462.50 kilograms of marijuana.” The district court accepted Miller’s guilty
    plea. It then sentenced her to 120 months’ imprisonment, the bottom end of the
    Guidelines range it calculated.
    Miller challenges primarily the district court’s decision at sentencing to use the
    marijuana equivalency of the pseudoephedrine she purchased, instead of the quantity of
    the mixture and substance containing methamphetamine she conspired to manufacture,
    to calculate her Guidelines range. The court’s election to do so increased Miller’s
    Guidelines range and ultimate sentence.
    B.
    The government has moved to dismiss Miller’s appeal on the ground that she
    waived the right to appeal her sentence as part of her plea agreement. We agree and
    therefore grant its motion.
    Miller’s plea agreement contains the following provision regarding appeals:
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    [T]he defendant agrees not to file a direct appeal of the defendant’s
    conviction or sentence except the defendant retains the right to appeal a
    sentence imposed above the sentencing guideline range as determined by
    the district court.
    Miller received a within-Guidelines sentence.
    The law in this area is well-settled: “Criminal defendants may waive their right
    to appeal as part of a plea agreement so long as the waiver is made knowingly and
    voluntarily.” United States v. Swanberg, 
    370 F.3d 622
    , 625 (6th Cir. 2004). When they
    do so, “[o]nly challenges to the validity of the waiver itself will be entertained on
    appeal.” United States v. Toth, 
    668 F.3d 374
    , 377 (6th Cir. 2012). Miller does not
    contend that her plea was unknowing or involuntary. She instead argues that the waiver
    provision does not cover challenges to the district court’s alleged misapplication of the
    Sentencing Guidelines and, alternatively, that the waiver is unenforceable on account of
    the government’s breach of the plea agreement. We take the arguments in turn.
    1.
    The terms of Miller’s appeal waiver are broad. She waived the right to appeal
    any sentence unless it is “above the sentencing guideline range as determined by the
    district court.” (Emphasis added.) Reasonably read, this language defers to the district
    court’s discretion in calculating Miller’s Guidelines range and permits her to challenge
    the resulting sentence only if it exceeds the top end of the range the court calculates.
    Miller’s sentence does not exceed the top end of the range as calculated by the district
    court. Therefore, the appeal waiver covers her present sentencing challenge and
    precludes our review.
    Had Miller wished to preserve a challenge to the district court’s Guidelines
    calculation, she certainly could have bargained for it. See, e.g., United States v.
    Brandon, 445 F. App’x 845, 846 (6th Cir. 2012) (plea agreement stating that “Defendant
    retains his right to directly appeal the Court’s adverse determination of any disputed
    guideline issue that was raised at or before the sentencing hearings”); United States v.
    Deanda, 450 F. App’x 498, 499 (6th Cir. 2011) (agreement stating that defendant
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                   Page 5
    “waives the right to appeal a sentence that is within or below the guideline range as
    determined by the Court at sentencing . . . except that the Defendant may appeal on
    grounds, preserved at sentencing, that the Court incorrectly determined the guideline
    range”); United States v. Vandewege, 433 F. App’x 388, 389 (6th Cir. 2011) (same);
    United States v. Flowers, 428 F. App’x 526, 527 (6th Cir. 2011) (same). We must give
    effect to the intent of the parties as expressed by the plain language in the plea
    agreement. See United States v. Moncivais, 
    492 F.3d 652
    , 662 (6th Cir. 2007) (“Plea
    agreements are to be enforced according to their terms.”).
    Resisting this conclusion, Miller argues that the waiver provision “clearly
    presupposes a correct calculation of [her] sentencing guideline range” and thus permits
    her challenge. She relies primarily upon United States v. McCoy, 
    508 F.3d 74
     (1st Cir.
    2007), but that case offers her no support. There, as part of his written plea agreement,
    the defendant waived his right to appeal any sentence that fell “within the guideline
    range.” 
    Id. at 78
    . The court held that such language “does not waive the right to appeal
    an alleged misapplication of the guidelines.” 
    Id.
     Miller’s waiver provision is unlike the
    one in McCoy. Indeed, McCoy distinguished the language in the provision before it from
    language in provisions like Miller’s that waives a defendant’s right to appeal any
    sentence imposed within the Guidelines range “as determined by the district court.” 
    Id.
    at 78 n.4. Such “[b]roader appeal waivers,” McCoy suggested, could preclude appellate
    challenges to the district court’s Guidelines calculation. 
    Id.
    In United States v. Giganti, 405 F. App’x 31 (6th Cir. 2010), we held that an
    appeal waiver that extinguished a defendant’s right to appeal any sentence “within or
    below the guideline range as determined by the Court at sentencing”—which is what
    Miller’s provision says—precluded any challenge to the district court’s Guidelines
    calculation. Id. at 37 (emphasis added). We found that the waiver provision was “very
    different” from the one in McCoy, and we expressly recognized that the discussion in
    McCoy regarding alternative waiver language in fact supported a finding of waiver in
    the case then before us. Id. The Third Circuit reached a similar result in United States
    v. Corso, 
    549 F.3d 921
     (3d Cir. 2008), where it distinguished McCoy and concluded that
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    a provision permitting an appeal only if the sentence “unreasonably exceeds the
    guideline range determined by the Court under the Sentencing Guidelines” explicitly
    lodges “broad discretion in the District Court to determine the applicable Guidelines
    range” and “certainly does not permit an appeal challenging the District Court’s
    application of the Guidelines.” 
    Id. at 928
     (emphasis in original). We agree with the
    reasoning in Giganti and Corso. Miller’s current challenge to her sentence is plainly
    foreclosed by her appeal waiver.
    2.
    Miller’s alternative position is that the government’s breach of the plea
    agreement frees her from her waiver. According to Miller, the government breached the
    agreement when it urged the district court to use pseudoephedrine’s marijuana
    equivalency to calculate Miller’s base offense level, despite expressly agreeing in
    writing that Miller had conspired to manufacture 80.43 grams of a mixture and substance
    containing methamphetamine.
    There was no breach. Miller’s argument depends entirely upon the premise that
    the government promised, in exchange for Miller’s promise to plead guilty, either (1) to
    ask the district court to determine Miller’s base offense level according to the agreed-
    upon quantity of mixture or substance containing methamphetamine; or (2) not to ask
    the district court to use pseudoephedrine’s marijuana equivalency in determining the
    base offense level. That premise, however, has no factual basis and is foreclosed by the
    plea agreement itself, which includes the following relevant provisions:
    The parties agree that the appropriate disposition of this case would be
    the following:
    a)      The Court may impose any lawful term of imprisonment up to the
    statutory maximum . . . .
    ***
    No promises have been made by any representative of the United States
    to the defendant as to what the sentence will be in this case. Any
    estimates or predictions made to the defendant by defense counsel or any
    other person regarding the potential sentence in this case are not binding
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    on the Court. The defendant understands that the sentence in this case
    will be determined by the Court after it receives the pre-sentence report
    from the United States Probation Office and any information presented
    by the parties.
    (Emphasis added.)
    Miller points to the statement in her plea agreement that she conspired with
    others to “manufacture approximately 80.43 grams of a mixture and substance
    containing a detectable amount of methamphetamine.” But the statement is simply
    that—a statement of fact; it cannot be reasonably read as a promise by the government
    to make (or not make) certain arguments at sentencing. See Moncivais, 
    492 F.3d at 663
    (noting that a plea agreement “must be construed as a reasonable person would interpret
    its words”). Furthermore, the statement appears in the section of the plea agreement
    supplying the factual basis for the plea and prefaced by the following: “These are the
    facts submitted for purposes of the defendant’s guilty plea. . . . Other facts may be
    relevant to sentencing. [The parties] retain the right to present additional facts to the
    Court to ensure a fair and appropriate sentence in this case.” 
    Id.
     This language
    undermines the relevance of the statement regarding the quantity of a mixture or
    substance for purposes of sentencing. Finally, any attempt to read the statement as a
    promise fails in light of the plea agreement’s integration clause: “[The parties] agree
    that . . . any other promises, representations, and statements whether made before,
    contemporaneous with, or after this agreement, are null and void.” The government did
    not breach the plea agreement.
    C.
    Because Miller validly waived her right to challenge her sentence, we grant the
    government’s motion to dismiss her appeal.
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                    Page 8
    II. Beals’s Appeal (No. 10–5264)
    A.
    The government charged Leslie Beals with (1) conspiracy to distribute 50 or
    more grams of methamphetamine and 500 or more grams of a mixture or substance
    containing a detectable amount of methamphetamine, (2) conspiracy to manufacture the
    same, and (3) possession of equipment used to manufacture methamphetamine. By way
    of five separate indictments, the government alleged that forty-nine defendants were part
    of the single drug conspiracy charged in counts one and two. Beals pleaded not guilty
    and went to trial. He was tried jointly with co-defendant Bobby Ambrose. The trial
    lasted five days.
    The testimony at trial showed that Beals assisted others, primarily co-defendant
    Christopher Baucom, who pleaded guilty and testified against Beals, to manufacture and
    sell methamphetamine. Beals’s assistance came in the form of supplying Baucom and
    others with vast amounts of cold pills containing pseudoephedrine, which is then
    extracted and used to create methamphetamine. Beals sometimes helped in extracting
    pseudoephedrine from the pills by crushing and placing them in denatured alcohol.
    Once the pseudoephedrine separated from the other ingredients in the pill, it was filtered
    from the other ingredients and dried. Beals provided other supplies for the cooks as
    well, including batteries containing lithium, another essential ingredient used to create
    methamphetamine. He also sold the finished product to others. Baucom testified that
    Beals helped him cook methamphetamine at least eight to ten times and that each session
    produced in excess of fifteen grams of methamphetamine.
    At the close of the evidence, Beals moved for a judgment of acquittal on all three
    counts, but the court denied the motion. He then argued to the jury that, although he
    may have been involved in multiple conspiracies to manufacture and sell
    methamphetamine, the government failed to prove that he engaged in the large, single
    conspiracy alleged in the indictment. The jury convicted him on all three counts. Beals
    timely appealed.
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    B.
    Beals contends that there was a fatal variance in the proofs on the conspiracy
    counts—the indictment alleged a single conspiracy but the evidence proved only the
    existence of multiple, smaller ones—and also that the evidence did not prove that he
    possessed equipment used to manufacture methamphetamine.               We review these
    challenges de novo. United States v. Swafford, 
    512 F.3d 833
    , 841 (6th Cir. 2008)
    (variance); United States v. Fisher, 
    648 F.3d 442
    , 450 (6th Cir. 2011) (sufficiency of the
    evidence).
    1.
    The jury convicted Beals of conspiracy to manufacture and distribute 50 or more
    grams of methamphetamine and 500 grams or more of a mixture or substance containing
    methamphetamine. Beals argues that the government proved the existence of only
    multiple, smaller conspiracies, not the larger one he was charged with joining. In his
    view, each cooking session was a separate conspiracy that ended after the cook.
    A variance occurs when “the charging terms of the indictment are unchanged, but
    the evidence at trial proves facts materially different from those alleged in the
    indictment.” Swafford, 
    512 F.3d at 841
     (internal quotation marks omitted). In a
    conspiracy prosecution, a variance demands reversal only if (1) “the indictment alleged
    one conspiracy, but the evidence can reasonably be construed only as supporting a
    finding of multiple conspiracies,” and (2) the variance prejudiced the defendant. United
    States v. Williams, 
    612 F.3d 417
    , 423 (6th Cir. 2010). Whether the government has
    proved one or only multiple conspiracies is a question of fact considered on appeal in
    the light most favorable to the government. United States v. Smith, 
    320 F.3d 647
    , 652
    (6th Cir. 2003).
    To establish a drug conspiracy, the government must prove an agreement to
    violate the drug laws—i.e., to manufacture or distribute drugs—and that each conspirator
    knew of, intended to join, and participated in the conspiracy. United States v. Walls,
    
    293 F.3d 959
    , 967 (6th Cir. 2002). Its burden is to prove that “each alleged member
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                   Page 10
    agreed to participate in what he knew to be a collective venture directed toward a
    common goal.” United States v. Warner, 
    690 F.2d 545
    , 549 (6th Cir. 1982) (quotation
    marks and citation omitted). A tacit or material understanding among parties to a
    conspiracy is sufficient to establish agreement. 
    Id.
     Agreement need not be proved with
    direct evidence; it can be inferred from circumstantial evidence reasonably interpreted
    as participation in a common plan. 
    Id.
    “A single conspiracy is not converted to multiple conspiracies simply because
    it can be subdivided, or because there are changes in the individuals involved or the roles
    that they play in the conspiracy.” Walls, 
    293 F.3d at 967
    . Nor does conversion take
    place “simply because each member of the conspiracy did not know every other member,
    or because each member did not know of or become involved in all of the activities in
    furtherance of the conspiracy.” Warner, 
    690 F.2d at 549
    . In determining the number of
    conspiracies, we consider whether there was a common goal among the participants, the
    nature of the scheme, and the extent of overlap in the participants’ various dealings.
    Smith, 
    320 F.3d at 652
    .
    When viewed in the light most favorable to the government, the evidence at
    Beals’s trial was sufficient to permit the jury to find the existence of a single drug
    conspiracy. First, the government successfully proved a common goal among the
    charged co-conspirators: the production of a steady supply of methamphetamine in
    order to satisfy their shared addiction. To achieve this goal, the co-conspirators both
    taught one another how to make methamphetamine and helped procure the ingredients
    and supplies needed to make it. The goal was shared by all participants, each of whom
    was aware to some extent that the conspiracy was larger than simply his or her
    individual interactions with others. The participants generally agreed that if suppliers
    provided pills and other materials to the cooks, the cooks would use them to make and
    share methamphetamine so all could satisfy their addictions.
    The nature of the scheme also suggests a single conspiracy. It revolved around
    a number of individuals, including Donald Huffman, Bobby Ambrose, Christopher
    Baucom, and Mike Holtsclaw, who knew how to cook methamphetamine and did so
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                    Page 11
    regularly. The cooks knew that each other cooked and sometimes assisted one another
    in doing so. But the cooks could not make the drug without the help of others. As
    Baucom explained, making methamphetamine requires a lot of pseudoephedrine. And
    although the drug is contained in over-the-counter cold medicine, one person can only
    buy so many pills at a time, usually just one box, to avoid tipping off law enforcement.
    Therefore, cooks depend on other addicts for pills. Addicts trade cold pills for
    methamphetamine and then consume what they need and sell the remainder for cash or
    more pills. The cooks and suppliers did not deviate from this scheme for satisfying their
    addictions. No one, for instance, rather than buying cold pills from a local drug store,
    imported large quantities of methamphetamine or its precursors from another state or
    country and sold them to addicts in the area. The pills were purchased locally and
    provided to the same handful of cooks, all of whom lived in the area. The nature of the
    scheme suggests a single conspiracy. Cf. Smith, 
    320 F.3d at
    652–53 (finding it relevant
    that each transaction in the single conspiracy “followed an identical modus operandi”).
    Finally, there was substantial overlap in the participants of the cooking sessions.
    See United States v. Mitchell, 
    484 F.3d 762
    , 770 (5th Cir. 2007) (“The more
    interconnected the various relationships are, the more likely there is a single conspiracy.”
    (quotation marks omitted)). Those who knew how to cook watched and learned from
    one another. For example, Huffman watched Holtsclaw cook and discussed with
    Ambrose various methods for making the drug. Ambrose also watched Huffman on
    occasion and once helped him clean up after a cook. Baucom provided Huffman with
    pills and testified that he worked with Ambrose, Holtsclaw, and Huffman, among others.
    Holtsclaw once helped Huffman steal a tank of anhydrous ammonia, another necessary
    ingredient in making methamphetamine, from a beverage store.
    There also was overlap and cooperation among those who supplied pills. Cooks
    would not go through the trouble of making the drug if only a small amount would be
    produced. Baucom testified that cooking up only one box worth of pills was not worth
    the effort and was therefore rarely done. Huffman said he usually tried to cook ten boxes
    at a time. Therefore, pill suppliers worked with each other to provide the necessary
    No. 10-5264/5432/5877/6084        United States v. Beals, et al.                 Page 12
    amount of pseudoephedrine to make a fruitful cooking session. Similarly, cooks did not
    always receive pills from the same people; there was significant intermingling. For
    instance, Christy Gray routinely gave pills to “a lot of different people,” including
    Huffman and Holtsclaw. Jacqueline Wigand exchanged pills for methamphetamine with
    both Holtsclaw and Ambrose, usually through an intermediary. Jason Woody gave
    Baucom pills in exchange for methamphetamine. One time, he went with Baucom to
    Ambrose’s garage to exchange pills for meth. Baucom introduced Woody to Ambrose
    for the purpose of giving Woody direct access to Ambrose so he did not have to go
    through Baucom. Woody later offered his home as a place where he, Baucom, and
    Ambrose could cook batches of meth. Daniel Burleson gave pills to Huffman, Baucom,
    and Sean Queen, another cook, in exchange for the finished product. Lori Collins traded
    pills with “multiple people,” including Holtsclaw and Baucom. Lesia Bradley developed
    a recipe for manufacturing anhydrous ammonia and shared it with Baucom. She cooked
    many times with Huffman, who is also her husband, for many years and witnessed him
    cook with Holtsclaw and Baucom. She sometimes attended gatherings and supervised
    other cooks, including Holtsclaw, Baucom, and Douglas Morrell. She attended one cook
    at Beals’s home where she provided anhydrous ammonia and helped the cooks start to
    process pills. Baucom, Woody, and Beals were present. She also knew Ambrose, and
    the two socialized together, one time getting high with methamphetamine that Ambrose
    had supplied. This small sample is representative of the overlapping relationships shared
    among cooks and pill suppliers.
    Based upon the common goal shared by the co-conspirators, the singular nature
    of the scheme used to achieve that goal, and the substantial overlap in participants, the
    evidence “does not exclude the possibility” that a single drug conspiracy existed. United
    States v. Caver, 
    470 F.3d 220
    , 236 (6th Cir. 2006). Beals’s alternative interpretation of
    the evidence is a nice one that he had the opportunity to argue to the jury in accordance
    with a proper instruction, but not one that the Due Process Clause required the jury to
    accept based on the evidence. And Beals’s further point that not all co-conspirators
    knew each another or attended the same cooking sessions similarly did not preclude
    finding a single conspiracy. See Warner, 
    690 F.2d at 549
    ; see also United States v.
    No. 10-5264/5432/5877/6084      United States v. Beals, et al.                   Page 13
    Rodriguez-Ramos, 
    663 F.3d 356
    , 362 (8th Cir. 2011) (“One conspiracy may exist despite
    the involvement of multiple groups and the performance of separate acts.” (quotation
    marks omitted)). The evidence permitted the jury also to conclude that Beals joined this
    single conspiracy.
    Swafford is not to the contrary. There, the defendant owned a home-and-garden
    store out of which he sold iodine, an essential ingredient in making methamphetamine.
    
    512 F.3d at 837
    . During the time charged in the indictment, the defendant sold large
    quantities of the ingredient to more than twenty customers, all of whom (except for two)
    had absolutely no connection with one another. The lack of connection meant that they
    shared no common goal, precluding a finding of a single conspiracy that involved the
    defendant and all the customers. 
    Id. at 842
    . The same problem does not exist here. As
    already discussed, there were extensive connections between cooks and the suppliers,
    who all shared a common goal of manufacturing the drug for the primary purpose of
    satisfying their addictions.
    2.
    The jury also convicted Beals of possessing equipment used to manufacture
    methamphetamine, in violation of 
    21 U.S.C. § 843
    (a)(6). Beals contends that the only
    evidence to support this conviction is the existence of a plastic cooler, hair dryer, and
    funnels found behind his house. He claims a lack of evidence that these items were
    actually used to cook methamphetamine or that the equipment had any connection to
    him. The government seems to agree and points instead to the evidence showing that
    Beals possessed lithium batteries and high quantities of cold pills containing
    pseudoephedrine, both of which are used to manufacture methamphetamine. The
    evidence was sufficient to find Beals guilty of this charge.
    C.
    For these reasons, we affirm Beals’s convictions.
    III. Ambrose’s Appeal (No. 10–5877)
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                   Page 14
    A.
    Bobby Ambrose was charged with the following offenses: (1) conspiracy to
    distribute 50 or more grams of methamphetamine and 500 or more grams of a mixture
    or substance containing a detectable amount of methamphetamine; (2) conspiracy to
    manufacture the same; (3) possession of equipment used to manufacture
    methamphetamine; (4) maintaining a place for the purpose of manufacturing,
    distributing, or using methamphetamine; (5) possession of a firearm in furtherance of a
    drug trafficking crime; and (6) being a felon in possession of a firearm. He pleaded not
    guilty and was tried jointly with co-defendant Leslie Beals. A jury convicted him on all
    counts. He appeals and raises four challenges.
    B.
    Some of the evidence introduced against Ambrose at trial—notably the gun that
    gave rise to the two gun convictions—was seized from his garage during the execution
    of a search warrant issued by a state-court judge and executed entirely by state officers.
    Ambrose moved to suppress this evidence, but the district court, upon the
    recommendation of a magistrate after an evidentiary hearing, denied the motion.
    1.
    During the evening hours of April 22, 2008, Michael Hensley, an officer with the
    Unicoi County Sheriff’s Department, presented to Tennessee Criminal Court Judge
    Robert Cupp an affidavit in support of an application for a search warrant. Hensley
    swore in the affidavit that a reliable confidential informant told him he had recently seen
    the following contraband in Ambrose’s garage, located at 106 Union Street in Erwin,
    Tennessee: four to five grams of methamphetamine, six grams of marijuana, four Xanax
    pills, a handgun, glass smoking pipes, and materials for making glass pipes. Hensley
    swore also that a records check of ephedrine purchases from local pharmacies revealed
    that Ambrose and others associated with him had recently purchased at least ten boxes
    of ephedrine, a key ingredient in making methamphetamine. The associates had
    apparently brought Ambrose the ephedrine for the purpose of manufacturing
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    methamphetamine. Based on this information, Judge Cupp issued a warrant for the
    search of the “entire garage area of [106] Union Street and [the] vehicles inside.”
    Although Hensley presented three copies of his affidavit and warrant for signature, Judge
    Cupp inadvertently signed and dated only one, which he retained as part of his official
    records in accordance with state rules. See Tenn. R. Crim. P. 41(d). Hensley left Judge
    Cupp’s home with the unsigned copies, unaware that they were not signed.
    The structure located at 106 Union Street is a large building that at an earlier time
    contained only a garage. Later, however, a section of the building was partitioned off,
    and the enclosed section now contains six to eight small, single-room apartments
    accessed by a separate entrance bearing an address of 108 Union Street. The portion of
    the building designated “106 Union Street” contains three areas: a garage, an apartment
    where Ambrose and his wife and child live, and an upstairs living area where Ambrose’s
    mother lives. When the officers arrived, they were unaware of the layout inside
    106 Union Street. From outside the front of the building one sees three doors: a large
    garage door, a pedestrian door labeled “106,” and a third labeled “108.” The door
    labeled “106” opens into a hallway that contains two interior doors—one that opens into
    the garage and another that opens into Ambrose’s apartment. A set of stairs in the
    hallway leads to an upstairs room where Ambrose’s mother resided. A door in an alley
    behind the building opens directly into Ambrose’s apartment.
    State officers executed the search warrant around midnight, shortly after Judge
    Cupp issued the warrant. A group went to the front door while others went to the back.
    The officers at the front door arrested Ambrose in the hallway immediately after
    entering. The group in the back knocked on the apartment door and announced that they
    had a search warrant. Ambrose’s wife answered, and the officers repeated that they had
    a warrant to search the garage. They entered and proceeded through the apartment to the
    hallway that leads to the garage. Two officers went upstairs to the area where
    Ambrose’s mother lived to briefly look for persons before meeting the remaining officers
    in the garage to assist with the search.
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                   Page 16
    During the search of the garage, officers found and seized contraband, including
    a handgun and coffee filters containing trace amounts of ephedrine, an essential
    ingredient in creating methamphetamine. Sometime during the night, officers briefly
    entered an apartment at the 108 Union Street address with the assistance of Ambrose’s
    mother, who had a key. Their informant had told them the person living there may have
    overdosed on methamphetamine and be in need of emergency medical assistance. They
    knocked on what they believed was the person’s door, but no one answered. Upon
    hearing the commotion, a neighbor opened his door and told the officers he had not seen
    the occupant in a few days. The officers relayed their concern to Ambrose’s mother,
    who retrieved a key and let the officers in. No one was there, so the officers left. One
    officer also briefly looked in a nightstand in Ambrose’s apartment for a key to a vending
    machine in the garage. No contraband was found or seized from any area other than the
    garage. Evidence seized from the garage, including the handgun, was offered against
    Ambrose at trial.
    2.
    Ambrose makes three suppression-related arguments on appeal: (1) the search
    warrant’s deficiency under state law rendered the search warrantless, in violation of the
    Fourth Amendment; (2) the warrant’s affidavit contained false information critical to the
    finding of probable cause; and (3) all seized evidence should have been suppressed
    because the officers searched in places not authorized by the warrant. When reviewing
    a district court’s ruling on a motion to suppress, we review its factual findings for clear
    error and its legal conclusions de novo. United States v. Archibald, 
    589 F.3d 289
    , 294
    (6th Cir. 2009). We may affirm the ruling on any ground supported by the record.
    United States v. Gill, 
    685 F.3d 606
    , 609 (6th Cir. 2012).
    a.
    Tennessee Rule of Criminal Procedure 41(d) requires that a magistrate issuing
    a search warrant prepare an original and two exact copies of the warrant. There is no
    dispute here that the search warrant did not comply with this requirement, as only one
    copy bore Judge Cupp’s signature. The government concedes that this procedural defect
    No. 10-5264/5432/5877/6084        United States v. Beals, et al.                    Page 17
    would require suppression in a state prosecution. See State v. Steele, 
    894 S.W.2d 318
    ,
    319 (Tenn. Crim. App. 1994). We consider whether suppression is similarly required
    in a prosecution in federal court.
    “The commonly-held position is that federal, not state, law governs the question
    of the validity of a [state-issued] search warrant in a federal criminal proceeding.”
    United States v. Shields, 
    978 F.2d 943
    , 945 (6th Cir. 1992); accord United States v.
    Clyburn, 
    24 F.3d 613
    , 614 (4th Cir. 1994) (“[T]he validity of a search warrant obtained
    by state officers is to be tested by the requirements of the Fourth Amendment of the U.S.
    Constitution, not by state law standards, when the admissibility of evidence in federal
    court is at issue.”). Similarly, “in federal court, [the exclusionary rule] only requires the
    court to exclude evidence seized in violation of the Federal Constitution.” United States
    v. Wright, 
    16 F.3d 1429
    , 1434 (6th Cir. 1994). That is because the exclusionary rule
    “emanates from the Fourth Amendment, not state law[.]” 
    Id.
     While the states are free
    to impose rules for searches and seizures that are more restrictive than the Fourth
    Amendment, those rules will not be enforced in a federal criminal proceeding. 
    Id.
    Therefore, “[i]n determining whether evidence obtained solely by state officers is
    admissible in federal court in the first instance, it is usually irrelevant whether a state
    rule of criminal procedure was violated.” United States v. Maholy, 
    1 F.3d 718
    , 721 (8th
    Cir. 1993); see also Virginia v. Moore, 
    553 U.S. 164
    , 178 (2008) (noting that “it is not
    the province of the Fourth Amendment to enforce state law”). This rule “promotes
    uniformity in federal prosecutions.” Wright, 
    16 F.3d at 1437
    .
    Although no court to our knowledge has before addressed the precise question
    raised here, we find that the answer is squarely governed by the rule that only the Fourth
    Amendment (to the exclusion of state law) applies in federal prosecutions involving
    evidence seized by state officials. So long as the Fourth Amendment is satisfied, there
    is no basis for suppression. Accordingly, we turn to the Fourth Amendment, which
    requires “only three things” with respect to search warrants. Dalia v. United States,
    
    441 U.S. 238
    , 255 (1979). The first is that they be issued only by “neutral and detached”
    magistrates “capable of determining whether probable cause exists for the requested
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                    Page 18
    arrest or search.” Shadwick v. City of Tampa, 
    407 U.S. 345
    , 350 (1972); see Johnson v.
    United States, 
    333 U.S. 10
    , 14 (1948) (“[The Fourth Amendment’s] protection consists
    in requiring that . . . inferences [of probable cause] be drawn by a neutral and detached
    magistrate instead of being judged by the officer engaged in the often competitive
    enterprise of ferreting out crime.”). There is no dispute that Judge Cupp satisfied these
    criteria when he authorized the search of Ambrose’s garage.
    The second requirement is that search warrants issue only upon a finding of
    “probable cause.” U.S. Const. amend. IV. We address this issue separately below and
    assume for present purposes that it was satisfied. The final requirement is that search
    warrants “particularly describ[e] the place to be searched, and the . . . things to be
    seized.” Id.; see Maryland v. Garrison, 
    480 U.S. 79
    , 84–85 (1987). There is similarly
    no dispute that the warrant met this requirement. Because the Fourth Amendment
    requirements for warrants were met in this case, the district court properly rejected
    Ambrose’s request for suppression on the basis of an invalid search warrant.
    Ambrose seeks to transform the warrant’s defect under state law into a
    constitutional violation by arguing that a state judge who does not comply with state
    requirements when approving a search warrant never “issues” the warrant, thereby
    making any resulting search warrantless and therefore unconstitutional. A similar
    situation arises when a state magistrate, in violation of state rules, relies upon unwritten
    (though sworn) statements from an officer to find probable cause for a search warrant.
    Suppression in such instances is not required in federal proceedings (for there is no
    Fourth Amendment violation) even though it would be required were the defendant
    being prosecuted in state court, solely on account of the state-law violation. See United
    States v. Parker, 4 F. App’x 282, 284 & n.2 (6th Cir. 2001); Shields, 
    978 F.2d at
    945–46;
    accord Clyburn, 
    24 F.3d at
    616–17; see also Maholy, 
    1 F.3d at 721
     (holding that an
    officer’s noncompliance with a state rule of procedure requiring “reasonable cause” for
    a nighttime search warrant is “irrelevant to determining, at least in the first instance,
    whether the fruits of the search are admissible in federal court”). This reasoning applies
    with the same force to noncompliance with a state rule that requires a magistrate to sign
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                    Page 19
    a certain number of copies of the warrant—it matters not in a federal proceeding; the
    warrant is not any less “issued.” Had Judge Cupp failed to sign any copy of the warrant,
    it might plausibly be maintained that a warrant never issued in the first place as a matter
    of fact. But that is not what happened here. Judge Cupp’s signature on one copy of the
    warrant was sufficient to satisfy the Fourth Amendment.
    Nor is it problematic under the Fourth Amendment that the officers executed an
    unsigned copy of the warrant. Cf. United States v. Lipford, 
    203 F.3d 259
    , 269–70 (4th
    Cir. 2000) (finding no Fourth Amendment violation where officers presented defendant
    with unsigned copy of search warrant before searching his home). Doing so did not
    make the warrant any less “issued.”
    Our recent decision in United States v. Master, 
    614 F.3d 236
     (6th Cir. 2010),
    upon which Ambrose relies, does not require otherwise. There, the government
    conceded that, as a matter of state statutory law, the state judge lacked authority to issue
    the search warrant, which was for a residence in a neighboring county over which the
    judge did not preside. 
    Id.
     at 237–39. We held the warrant void ab initio, explaining that
    the Fourth Amendment permits warrants to issue only after a probable-cause
    determination made by a neutral and detached “magistrate,” a term the Supreme Court
    has permitted the States to define. “The qualifications of a magistrate,” we noted, “are
    therefore inextricably intertwined with state law,” and “[s]tate law determines what
    person is allowed to approve what warrant.” 
    Id. at 240
    . We reasoned that if the States
    get to decide who has authority to issue warrants (provided the persons are neutral and
    detached and capable of determining whether probable cause exists), then they are
    entitled also to define the scope of that authority in any way they wish. Because the
    magistrate in Master lacked authority under state law to issue a warrant for a search in
    a different county, the warrant was never issued by a “magistrate,” in violation of the
    Fourth Amendment. 
    Id. at 241
    . See also United States v. Scott, 
    260 F.3d 512
    , 515 & n.2
    (6th Cir. 2001) (search warrant signed by a retired state judge “wholly without legal
    authority to issue a warrant” under state law was void ab initio), overruled on other
    grounds by Master, 
    614 F.3d at 242
    ; United States v. Bennett, 
    170 F.3d 632
    , 636–37
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                   Page 20
    (6th Cir. 1999) (search warrant issued by court clerk authorized by state law to do so was
    valid under the Fourth Amendment).
    Unlike in Master, however, the Fourth Amendment question here is not tied to
    a question of state law. Judge Cupp had authority under state law to issue search
    warrants, and his failure to sign two copies of the search warrant did not in any way
    deprive him of that authority.
    United States v. Bennett, 
    170 F.3d 632
     (6th Cir. 1999), also does not change
    matters. At issue there was a search warrant issued by a state court clerk while the
    judges were absent. State law authorized the clerk to issue warrants in such instances.
    The defendant claimed the warrant was invalid due to noncompliance with Federal Rule
    of Criminal Procedure 41, which allows only judges to issue warrants. The contention
    prompted us to reaffirm that “the validity of a search warrant obtained by state officers
    for seizure of evidence ultimately used in a federal prosecution turns only on
    constitutional issues” (and not federal statutory issues), 
    id. at 635
    , and we rejected the
    defendant’s argument. We also stated, perhaps inartfully, that “the validity of the search
    warrant in this case must be tested pursuant to Kentucky criminal procedural
    requirements and the Constitution.” 
    Id. at 636
    . Ambrose understandably seeks refuge
    in our statement regarding the relevance of state law to the question of a warrant’s
    validity for purposes of federal suppression proceedings. These two statements appear
    to be in conflict—the first says to consider only federal law, the second says to look also
    at state law. Upon a closer reading, however, they are entirely consonant.
    Bennett asked whether the court clerk had authority to issue the search warrant.
    The answer to this question—the very one involved in Master, supra—turned on a
    matter of state law and therefore required us to consider it to answer the constitutional
    question. Accordingly, the statements, both correct, are consistent in the following way:
    the validity of a state warrant in federal proceedings does indeed turn only on
    constitutional issues, but because the constitutional question involved there—whether
    the court clerk was a neutral and detached magistrate, as required by the Fourth
    Amendment—depended on state law, we had to consider state procedural requirements
    No. 10-5264/5432/5877/6084          United States v. Beals, et al.                         Page 21
    in order to reach an answer. Our statement in Bennett regarding the consideration of
    state law in a federal suppression proceeding is irrelevant here, for the answer to the
    Fourth Amendment question does not depend upon state law.
    b.
    Next, Ambrose contends that the search warrant included a false statement that
    was necessary to establish probable cause for the search.1 The targeted statement
    concerns a check of pharmacy records purportedly performed by Major Hensley that
    apparently revealed that Ambrose had purchased at least ten boxes of ephedrine within
    the past seven days. But even if we excise this allegedly false statement from Hensley’s
    affidavit, we are still left with enough information to generate probable cause for the
    search. See Franks v. Delaware, 
    438 U.S. 154
    , 156 (1978). The following facts gave
    the state judge a “substantial basis” for finding “a fair probability that contraband or
    evidence of a crime [would] be found” in the garage, Illinois v. Gates, 
    462 U.S. 213
    ,
    238–39 (1983): (1) the confidential informant recently saw various illegal drugs in
    specific amounts in the garage; (2) Ambrose’s associates recently brought him boxes of
    ephedrine with the purpose of manufacturing methamphetamine; (3) the informant saw
    glass smoking pipes and materials for making these pipes in the garage; (4) the
    informant saw a handgun in the garage; and (5) Ambrose was a felon and therefore not
    permitted to possess a firearm.
    c.
    In his final challenge to the search, Ambrose contends that suppression of all the
    seized evidence was necessary because the authorized search of the garage devolved into
    an unlawful general search of the entire building, including Ambrose’s apartment, his
    mother’s apartment, and an apartment at the 108 Union Street address. See United States
    v. Lambert, 
    771 F.2d 83
    , 93 (6th Cir. 1985) (“A flagrant disregard for the limitations of
    a search warrant might make an otherwise valid search an impermissible general search
    1
    The government contends that Ambrose forfeited this argument by not objecting to the
    magistrate’s report and recommendation. See United States v. Walters, 
    638 F.2d 947
    , 949–50 (6th Cir.
    1981). It is mistaken, because Ambrose did object. See R.185 at 5–6.
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                   Page 22
    requiring the suppression of all evidence seized during the search.”).           Blanket
    suppression, though an extreme remedy for a Fourth Amendment violation, is
    nonetheless warranted when officers “flagrant[ly] disregard” the limitations on a search
    warrant. 
    Id.
     The remedy is appropriate where officers “‘exceed[] the scope of the
    warrant in the places searched’ (rather than the items seized).” United States v. Garcia,
    
    496 F.3d 495
    , 507 (6th Cir. 2007) (quoting Waller v. Georgia, 
    467 U.S. 39
    , 43 n.3
    (1984)). If the search of places not authorized by a warrant satisfies an exception to the
    warrant requirement, however, there is no violation and no basis for blanket suppression.
    See 
    id.
     (explaining that the test is “whether [the officers’] search unreasonably exceeded
    the scope of the warrant”). Although the district court acknowledged these rules and
    addressed some of Ambrose’s allegations on this front, it did not address all of them.
    It thereby left us with an incomplete set of findings that must be supplemented.
    Officers briefly looked in an upstairs living area where Ambrose’s mother
    resides. They did so not for the purpose of finding contraband, but rather to ensure their
    safety from persons who might be hiding therein and wanting to attack them during the
    search of the garage. When the officers arrived at the building, they learned that the
    address that contained the garage and Ambrose’s apartment also housed an upstairs room
    that connected directly to the garage by a hallway. Ambrose’s wife told them there was
    another person upstairs. The officers already believed that drugs and at least one gun
    were inside the building. This knowledge allowed them to perform a brief protective
    sweep of the upstairs living area. Cf. Maryland v. Buie, 
    494 U.S. 325
    , 334–35 (1990);
    United States v. Taylor, 
    666 F.3d 406
    , 410 (6th Cir. 2012).
    Officers also entered and briefly looked inside a non-adjoining apartment at the
    108 Union Street address upon their belief that the occupant might be in need of
    immediate medical attention due to a possible drug overdose. There is absolutely no
    indication, however, that Ambrose had any expectation of privacy (let alone a reasonable
    one) in an apartment being rented by another individual. Accordingly, Ambrose lacks
    the ability to challenge the officers’ brief entry into the room. See Rakas v. Illinois,
    No. 10-5264/5432/5877/6084         United States v. Beals, et al.                 Page 23
    
    439 U.S. 128
    , 140 (1978); United States v. King, 
    227 F.3d 732
    , 743–44, 751 (6th Cir.
    2000).
    During the search of the garage, officers observed a locked vending machine that
    they wished to open and search. Rather than destroy the machine, they asked Ambrose
    whether he had a key to it. He responded by giving the officers consent to look for the
    key in his vehicle and in a nightstand in his apartment. An officer went to the apartment
    and advised Mrs. Ambrose of her husband’s consent and looked inside a nightstand for
    the key with her assistance (and without any objection). The district court’s finding that
    Ambrose gave consent to this limited search of his nightstand is not clearly erroneous.
    See United States v. Collins, 
    683 F.3d 697
    , 701–02 (6th Cir. 2012).
    Three other aspects of the search may be more troublesome. We say “may”
    because the district court did not fully address them, so we lack the findings necessary
    to determine whether blanket suppression is warranted. They all involve the entry and
    search of Ambrose’s apartment apart from the nightstand search. First, officers testified
    that when they knocked on Ambrose’s apartment door in their attempt to secure consent
    to search the garage, R.176 at 186–87, Mrs. Ambrose opened it and freely let them in.
    R.176 at 43 (“[W]e asked if we could come in, she invited us in.”), 65 (“I told her who
    we were, identified ourselves, told her why we were there. She invited us in, told us to
    come in[.]”). The officers then walked through the apartment and into the hallway that
    leads to the garage. 
    Id.
     at 43–44. According to Mrs. Ambrose, the officers entered her
    apartment without asking. 
    Id. at 105
    . In fact, she asked to get dressed before they came
    in, but the officers said “no,” pushed open the door, and came in anyway. 
    Id.
     at 105–06.
    She said she never invited them in or otherwise gave consent for them to enter. 
    Id.
     at
    109–10. The district court did not address this entry, so it never determined which
    version of the facts to believe.
    Second, Major Hensley and Ronnie Adkins, Chief Investigator for the Unicoi
    County Sheriff’s Department, both testified that they searched Ambrose’s apartment at
    his wife’s request. 
    Id.
     at 46–47, 51, 69–70. According to both officers, when they
    explained to Mrs. Ambrose the basis for their search of the garage, she became
    No. 10-5264/5432/5877/6084              United States v. Beals, et al.                             Page 24
    concerned for her own and her young child’s safety and asked the officers to “look
    around” her apartment for toxic items related to methamphetamine. They did so and
    found nothing of concern. 
    Id.
     Mrs. Ambrose flatly denies asking officers to search her
    apartment. 
    Id. at 109
    , 113–14. This dueling testimony was never resolved by the district
    court, so there is no finding whether or not Mrs. Ambrose consented to the search of the
    apartment.2
    Finally, Ambrose’s mother and sister testified that they watched officers search
    Ambrose’s apartment after Mrs. Ambrose left to take her son to the hospital. 
    Id.
     at
    117–18, 124–25, 131. His mother saw officers take the mattress off the bed and
    rummage through dresser drawers. 
    Id. at 118
    . Mrs. Ambrose corroborated this
    testimony, stating that it appeared her apartment had been thoroughly searched—her
    mattress was out of place, clothes were on the floor, and dresser drawers were left open.
    
    Id. at 110
    . The officers, however, testified to the contrary. 
    Id. at 71
     (Q. Okay. You did
    not search that apartment where the young lady was? A. Only the area that she
    requested.”). This second alleged search of the apartment also was not addressed below.
    In the absence of necessary findings, a remand is required for the limited purpose
    of the district court making further findings on these unresolved matters regarding
    Ambrose’s apartment (initial entry, search allegedly at Mrs. Ambrose’s request, second
    search in Mrs. Ambrose’s absence). We nevertheless will address the remaining issues
    raised in Ambrose’s appeal and the government’s cross-appeal and will assume for such
    purposes that the search did not unreasonably exceed the scope of the warrant. In the
    event the district court determines the officers exceeded the warrant’s scope, it should
    determine whether blanket suppression is warranted and, if so, how suppressing all of
    the evidence affects Ambrose’s convictions and sentence. Either party may then appeal
    from the new judgment.
    2
    The district court sidestepped the issue of consent by finding that the officers entered the
    apartment only for the purpose of looking for other persons and thus never truly searched the apartment.
    But no officer testified that they swept the apartment for persons. Rather, they testified that they searched
    the apartment for methamphetamine-related materials and did so only at Mrs. Ambrose’s request. R.176
    at 46–47, 67, 69–70, 71. Officer Ronnie Adkins said he briefly looked in an attic area inside the apartment
    to make sure no one was hiding there. But that was only after he and Hensley searched the apartment for
    methamphetamine. 
    Id.
     at 70–71.
    No. 10-5264/5432/5877/6084      United States v. Beals, et al.                  Page 25
    C.
    In his next claim of error, Ambrose contends that the district court erred by not
    ordering the government to disclose the identity of a confidential informant whose
    statements to police gave rise to the search of Ambrose’s garage. The following
    exchange took place between Ambrose’s counsel and an investigating officer:
    Q. Now you indicated that an informant had told you that there was a
    pistol in that garage, right?
    A. Yes, Sir.
    Q. Who is that informant?
    MS. HEBETS: Objection, Your Honor, as to relevance.
    Q. Your Honor, I may want to call that informant. I don’t think it’s
    irrelevant at all.
    MS. HEBETS: Your Honor, I think Mr. Smith needs to lay more
    groundwork if he wants to call that witness. I’m not sure what difference
    it makes. A weapon was found in the garage.
    Q. Your Honor, as the Court knows, during the course of suppression
    hearings and things like that an informant is not disclosed. Now we’re
    talking about permitting hearsay evidence of an informant and not
    permitting me to know who that informant is and to call them. I’d ask
    again to ask the Court to direct him to tell us who his informant was.
    THE COURT: Well, at this point the question is, the informant had
    reported that the gun was located there?
    Q. Yes, Sir.
    THE COURT: And the Sheriff found the gun there?
    Q. That’s right.
    THE COURT: Alright. Let’s leave it at that.
    Q. Did your informant ever describe to you what type of pistol?
    A. He did, yes.
    Q. Okay. And what did your informant tell you?
    MS. HEBETS: Objection, hearsay, relevance.
    THE COURT: (INAUDIBLE) the informant.
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                    Page 26
    Q. Your Honor, I’d like to have the informant’s name.
    THE COURT: I don’t believe that it’s necessary.
    Q. Would the Court like me to move on, Your Honor?
    THE COURT: Yes.
    In Roviaro v. United States, 
    353 U.S. 53
     (1957), the Supreme Court recognized
    the government’s limited privilege to “withhold from disclosure the identity of persons
    who furnish information of violations of law to officers charged with enforcement of that
    law.” 
    Id. at 59
    . However, “[w]here the disclosure of an informer’s identity, or of the
    contents of his communication, is relevant and helpful to the defense of an accused, or
    is essential to a fair determination of a cause, the privilege must give way.” 
    Id.
     at 60–61.
    In making the determination, trial courts must balance the public’s interest in protecting
    the flow of information against the defendant’s right to prepare a defense. “Whether a
    proper balance renders nondisclosure erroneous must depend on the particular
    circumstances of each case,” including, among other relevant factors, “the crime
    charged, the possible defenses, [and] the possible significance of the informer’s
    testimony[.]” 
    Id. at 62
    . We review a district court’s decision on the matter for an abuse
    of discretion. United States v. Jenkins, 
    4 F.3d 1338
    , 1341 (6th Cir. 1993).
    The district court was within its discretion to allow the government to withhold
    the identity of its confidential informant. Ambrose failed to show that disclosure was
    “essential to a fair trial.” United States v. Moore, 
    954 F.2d 379
    , 381 (6th Cir. 1992).
    Indeed, Ambrose has not demonstrated how disclosure would have assisted him in any
    way. He attempts to compare his situation to Roviaro, where the Supreme Court found
    reversible error in not ordering disclosure. The defendant in that case was charged with
    facilitating the transportation of drugs while knowing they were imported illegally.
    Roviaro, 
    353 U.S. at 63
    . An informant drove to a location and was later met by the
    defendant, who got into the car before the two drove off. The car later stopped, and the
    defendant got out, retrieved a small package from behind a tree, gave it to the informant,
    and walked away. 
    Id. at 57
    . The Court found the charged offense “so closely related to
    [the informant] as to make his identity and testimony highly material” and potentially
    No. 10-5264/5432/5877/6084        United States v. Beals, et al.                   Page 27
    helpful to the defense. 
    Id.
     at 63–64. Central to the Court’s decision was that the statute
    did not proscribe mere drug possession, and that the only material witness, apart from
    the defendant, was the informant, who was in the car with the defendant and may have
    disputed testimony from the government agents who witnessed the transaction from a
    distance. The informant might have established entrapment or the defendant’s potential
    lack of knowledge regarding the package’s contents. 
    Id. at 64
    .
    Here, by contrast, the only role the confidential informant played was supplying
    reliable information to police that led to a fruitful search. The informant did not
    orchestrate or involve himself in any controlled methamphetamine purchases, supply
    Ambrose with pseudoephedrine, or sell or lend Ambrose the handgun later found in the
    garage.     The informant helped orchestrate the search that led to discovery of
    incriminating evidence, not the crimes themselves. Accordingly, the informant could
    not testify to any relevant fact, and the district court was therefore within its discretion
    not to order disclosure.
    D.
    Finally, Ambrose challenges the sufficiency of the evidence on his conspiracy
    and firearm convictions.
    1.
    With respect to his challenge to the drug-conspiracy convictions, Ambrose makes
    the same arguments Beals made regarding single-versus-multiple conspiracies. For the
    reasons stated in our rejection of Beals’s challenge, the evidence permitted the jury to
    find the existence of the single conspiracy alleged in the indictment and that Ambrose
    joined this conspiracy.
    2.
    Ambrose also challenges the sufficiency of the evidence that he possessed a
    firearm in furtherance of a drug trafficking crime. See 
    18 U.S.C. § 924
    (c). Specifically,
    he argues that the evidence is insufficient with respect to the “in furtherance of” element
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                  Page 28
    of the offense, which requires that the firearm be possessed to “advance, promote, or
    facilitate” the underlying criminal activity. United States v. Paige, 
    470 F.3d 603
    , 609
    (6th Cir. 2006).
    “[T]he possession of a firearm on the same premises as a drug transaction would
    not, without a showing of a connection between the two, sustain a § 924(c) conviction.”
    United States v. Mackey, 
    265 F.3d 457
    , 462 (6th Cir. 2001). “In order for the possession
    to be in furtherance of a drug crime, the firearm must be strategically located so that it
    is quickly and easily available for use.” 
    Id.
     “[P]ossession of a wall-mounted antique or
    an unloaded hunting rifle locked in a cupboard[,]” for instance, would not satisfy the
    statute. 
    Id.
     The evidence in Mackey showed an illegally possessed and loaded short-
    barreled shotgun located in the living room of a crack house. It was easily accessible to
    the defendant and was placed next to drug scales and razor blades. The defendant was
    arrested near the gun and was in possession of cocaine and a large sum of cash. We
    found that a jury could find that the firearm’s purpose was to “provide defense or
    deterrence in furtherance of the drug trafficking for which the defendant was arrested.”
    
    Id.
     at 462–63; see also Paige, 
    470 F.3d at
    609–10 (evidence sufficient where two loaded
    guns were found under a couch cushion in a residence where crack was being sold
    throughout the day and night and where officers found crack, $900 cash, and digital
    scales dusted in cocaine residue).
    Here, the evidence was sufficient for a jury to conclude that Ambrose possessed
    the .22-caliber handgun in furtherance of a drug trafficking crime. When officers
    searched his garage, they found the loaded handgun wrapped in a cloth sitting on a shelf
    in the open. Although Ambrose’s father testified that he owned the gun, ownership is
    different from possession—one can possess a gun without owning it. Ambrose worked
    daily in the garage, a place where others met him on occasion to exchange drugs and
    drug-making materials. The evidence also showed that the garage was used as a “pill-
    washing station,” i.e., a location used in the early stages of making methamphetamine
    to separate pseudoephedrine from the remaining substances in cold-medicine pills.
    Officers found wet coffee filters containing ephedrine residue in the trash can in the
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                    Page 29
    garage during the search. Although Ambrose’s father testified that he put the gun on the
    garage shelf with the intent of repainting it at some point but never got around to it, that
    does not reasonably explain why the gun was loaded when it was found. Nor was the
    jury required to believe Ambrose’s father’s testimony. Furthermore, Baucom testified
    that Ambrose used a gun (though not necessarily this gun) in the past to rob him of a
    gun, cash, and drug-making materials. He also testified that he bought “a couple” of
    guns from Ambrose in the past. The jury was permitted to use this evidence to conclude
    that Ambrose used guns to “advance, promote, or facilitate” his drug-trafficking
    enterprise, increasing the likelihood that the handgun found in the garage was used in
    the same manner.
    E.
    For these reasons, we affirm Ambrose’s convictions on the assumption that the
    evidence seized from his garage was properly admitted at trial. We remand the matter
    to the district court for the purpose of making the necessary factual findings identified
    above.
    IV. Government’s Cross-Appeal (No. 10–6084)
    The government appeals Ambrose’s sentence, arguing that it has since become
    unlawful in light of an intervening Supreme Court case decided during this appeal.
    Ambrose was sentenced to 168 months’ imprisonment, among other
    punishments. He is subject to a mandatory minimum sentence of ten years on each of
    the two drug-conspiracy convictions on account of the weight involved. See 
    21 U.S.C. § 841
    (b)(1)(A)(viii). The government asserts that he is subject also to a mandatory
    minimum sentence of five years for his conviction under § 924(c) that must run
    consecutive to the ten-year sentences, resulting in a mandatory minimum prison sentence
    of fifteen years (180 months). See 
    18 U.S.C. § 924
    (c)(1)(A)(i), (D)(ii). The government
    concedes, however, that this mandatory minimum sentence was prohibited by our
    precedent at the time Ambrose was sentenced, precedent the district court dutifully
    followed when imposing the sentence. See United States v. Almany, 
    598 F.3d 238
    ,
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                  Page 30
    241–42 (6th Cir.) (holding that a defendant convicted under § 924(c) who is already
    subject to any mandatory minimum greater than the one required by § 924(c) is not
    subject also to a mandatory, consecutive sentence for the § 924(c) conviction), judgment
    vacated, 
    131 S. Ct. 637
     (2010) (mem.). The sentence was lawfully imposed.
    However, while this appeal was pending, the Supreme Court decided Abbott v.
    United States, 
    131 S. Ct. 18
     (2010). The Court there held, directly contrary to Almany
    (and the district court here), that a defendant convicted under § 924(c) is subject to the
    highest mandatory minimum specified in that statute unless another statutory provision
    directed to the very conduct § 924(c) proscribes—i.e., using, carrying, or possessing a
    firearm in connection with a crime of violence or a drug-trafficking crime—requires a
    higher mandatory minimum. Id. at 23, 29. Both parties agree that Abbott covers
    Ambrose’s conviction under § 924(c). Because the district court declined to impose a
    consecutive minimum sentence of five years for the conviction, Ambrose’s sentence is
    now unlawful, and he must be resentenced. Cf. United States v. Taylor, 
    666 F.3d 406
    ,
    411 (6th Cir. 2012).
    Ambrose makes two arguments in an attempt to avoid this result; both are
    unconvincing. He first asserts that the government somehow forfeited its challenge to
    Ambrose’s sentence by failing to argue, both here and below, that the sentence is
    “unreasonable” or that the district court otherwise “abused its discretion.” Initially,
    claims that a sentence is unreasonable or resulted from an abuse of discretion are
    appellate arguments, so the government was not required to make them before the
    district court. United States v. Vonner, 
    516 F.3d 382
    , 389 (6th Cir. 2008) (en banc). In
    any event, the government did argue at sentencing that Almany was wrongly decided.
    And it has properly argued before us that the sentence is unlawful in light of Abbott.
    That is sufficient.
    Ambrose next contends that subjecting him to a mandatory, consecutive sentence
    of five years would violate concepts that underlie the Ex Post Facto Clause of the United
    States Constitution. See U.S. Const. Art. I, § 9, cl. 3 (“No . . . ex post facto Law shall
    be passed.”). Although that clause by its terms applies only to legislative enactments,
    No. 10-5264/5432/5877/6084       United States v. Beals, et al.                   Page 31
    the Supreme Court has recognized that the Fifth Amendment’s Due Process Clause
    provides similar protections with respect to retroactive application of judicial
    interpretations of criminal statutes that are “unexpected and indefensible by reference
    to the law which had been expressed prior to the conduct in issue.” Rogers v. Tennessee,
    
    532 U.S. 451
    , 461 (2001) (quoting Bouie v. City of Columbia, 
    378 U.S. 347
    , 354
    (1964)). Due process entitles persons to “fair warning” that criminal liability will attach
    to what previously had been lawful conduct. 
    Id.
     at 459–60. We have held that concepts
    of “fair warning” protect individuals also from ex post applications of unforeseeable
    judicial expansions of the punishments that result from a conviction, a protection
    embodied in the Ex Post Facto Clauses themselves as interpreted by the Supreme Court,
    see Weaver v. Graham, 
    450 U.S. 24
    , 28 (1981). See Dale v. Haeberlin, 
    878 F.2d 930
    ,
    934 (6th Cir. 1989).
    Here, Ambrose contends that the Supreme Court in Abbott interpreted § 924(c)
    “directly contrary” to its plain language, thereby depriving him of fair warning of his
    potential punishment. Even assuming the continued validity of our view that due
    process protects against unforeseen judicial expansion of the punishments for known
    criminal conduct (as opposed to the conduct proscribed), see Webb v. Mitchell, 
    586 F.3d 383
    , 392 (6th Cir. 2009) (potentially calling Dale into doubt on this point in light of
    Rogers v. Tennessee, 
    532 U.S. 451
     (2001)), Ambrose’s position that he lacked fair
    warning is difficult to reconcile with the unanimous views of the Justices in Abbott that
    the statute unambiguously required a consecutive five-year sentence for those in
    Ambrose’s position, Abbott, 
    131 S. Ct. at
    31 n.9, and that the government’s contrary
    position “gives effect to the statutory language,” 
    id. at 29
    . Further, Ambrose is unable
    to point to one decision in existence at the time he committed the offense that favored
    his reading of the statute, thus making his claimed lack of fair warning less availing. Cf.
    Bouie, 
    378 U.S. at
    356–57. (The first to go his way was United States v. Whitley, 
    529 F.3d 150
     (2d Cir. 2008), decided one month after he committed the offense.)
    Finally, Ambrose asks us to apply the rule of lenity, which “requires ambiguous
    criminal laws to be interpreted in favor of the defendants subjected to them.” United
    No. 10-5264/5432/5877/6084     United States v. Beals, et al.                 Page 32
    States v. Santos, 
    553 U.S. 507
    , 514 (2008). But given that the Supreme Court in Abbott
    found § 924(c) unambiguous and declined to afford lenity in that case, we see no basis
    for doing so here. Abbott, 
    131 S. Ct. at
    31 n.9. For these reasons, Ambrose’s current
    sentence is unlawful, and he must be resentenced consistent with Abbott (assuming, of
    course, that his § 924(c) conviction survives the district court’s further factfinding
    regarding the search).
    V.
    For these reasons, we DISMISS Miller’s appeal (Appeal No. 10–5432),
    AFFIRM Beals’s convictions (Appeal No. 10–5264), VACATE Ambrose’s sentence,
    and REMAND Ambrose’s case to the district court for proceedings consistent with this
    opinion (Appeal Nos. 10–5877 and 10–6084).
    No. 10-5264/5432/5877/6084          United States v. Beals, et al.                Page 33
    _______________________
    CONCURRENCE
    _______________________
    TARNOW, Senior District Judge, concurring. While I agree with the Court’s
    outcome, I write separately to note several troubling issues in Appellant Miller’s case.
    As noted by the Court, the law is clear that “defendants may waive their right to
    appeal as part of a plea agreement so long as the waiver is made knowingly and
    voluntarily.” United States v. Swanberg, 
    370 F.3d 622
    , 625 (6th Cir. 2004). The
    majority finds that Miller “does not contend that her plea was unknowing . . . .” Instead,
    Miller argues that the waiver provision was not intended to cover a situation such as her
    current appeal, or that the government breached the plea agreement.
    Because a plea agreement constitutes an agreement whereby a defendant gives
    up their freedom to contest criminal charges, plea agreements create “special due process
    concerns for fairness and the adequacy of procedural safeguards . . . .” United States v.
    Ready, 
    82 F.3d 551
    , 558 (2d Cir. 1996) (internal citations omitted). Plea agreements
    “are to be interpreted strictly, with ambiguities construed against the government.”
    United States v. Caruthers, 
    458 F.3d 459
    , 470 (6th Cir. 2006) (citations omitted). In this
    case, Miller’s plea agreement contained a waiver of appeal unless her eventual sentence
    was “above the sentencing guideline range as determined by the district court.” The
    Court finds, and I agree, that based on language of her waiver, Miller’s eventual
    sentence was not above the guidelines range as determined by the district court - though
    the district court’s determination of the guidelines range was contrary to the stipulated
    facts in her plea agreement.
    The Court holds that Miller “could have bargained” for a narrower waiver, for
    instance by including language that she reserved the right to appeal whether “the Court
    incorrectly determined the guidelines range.” The Court thus implies that Miller
    consciously chose to forego a more narrow waiver for some unstated advantage, or that
    she was simply deficient in her bargaining and unnecessarily exposed herself to the
    possibility of a higher sentence.
    No. 10-5264/5432/5877/6084           United States v. Beals, et al.                         Page 34
    My point is not to question the Court’s holding that Miller’s waiver was knowing
    and voluntary, but rather to note that requiring sophisticated bargaining by criminal
    defendants to retain the right to appeal a sentence likely contributes to uncertainty
    regarding whether a plea was knowing or voluntary. It does not seem to me that justice
    is served by permitting plea agreements that (bargaining aside) result in defendants
    agreeing to a plea that they did not intend or properly understand. Moreover, defendants
    may have less incentive to accept guilty pleas if they are concerned that they are actually
    at risk of a higher sentence than they thought had been agreed to in their plea agreement.
    I would recommend that counsel for both defendants and the government strive
    to create plea agreements that state in plain terms the maximum possible sentence a
    defendant might receive.1 Defendants who plead guilty based on an agreement that
    provides a clear statement of the maximum likely sentence are adequately forewarned
    of the possible consequences of their guilty plea, even in a “worst case” scenario where,
    as here, a court construes the evidence and sentencing guidelines differently than a
    defendant expected when agreeing to their plea.
    If discussion of the maximum possible sentence is required in plea agreements
    the result is to eliminate ambiguity in the guilty-plea process, surely an important goal
    given the interests at stake. In United States v. Shedrick, 
    493 F.3d 292
    , 299-300 (3d Cir.
    2007), the court found that a guilty plea was knowingly made in part because the
    agreement explicitly stated that the defendant faced a maximum potential sentence of ten
    years’ incarceration. The district court also discussed the maximum sentence during the
    plea colloquy. The defendant could therefore not complain that he was unaware of the
    consequences of his plea. In United States v. Williams, 
    198 F.3d 988
    , 993 n.1 (7th Cir.
    1999), the court found that, if an explicit stipulation was made as to the maximum
    sentence, the district court should have rejected a plea agreement during the plea
    colloquy where a mutual mistake of fact was present in the plea agreement as to the
    maximum possible sentence. As a result of the mutual mistake, the United States Court
    1
    A judge is not bound by stipulations in plea agreements and may independently determine the
    facts relevant to sentencing. U.S.S.G. § 6B1.4(d).
    No. 10-5264/5432/5877/6084        United States v. Beals, et al.                    Page 35
    of Appeals for the Third Circuit affirmed the district court’s decision to allow the
    defendant to withdraw his plea of guilty.
    As another example of such a system in operation, 
    10 U.S.C. § 845
    (a), which
    discusses plea agreements in the Uniform Code of Military Justice, states that “if it
    appears that [the defendant] has entered the plea of guilty improvidently or through lack
    of understanding of its meaning and effect, or if he fails or refuses to plead, a plea of not
    guilty shall be entered in the record . . . .” Military courts have found that “a substantial
    misapprehension of the maximum sentence may vitiate the providence of a plea of
    guilty.” United States v. Walls, 
    9 M.J. 88
    , 90-91 (C.M.A. 1980). Thus, most plea
    agreements in military courts contain a provision concerning the maximum possible
    sentence, without which a defendant cannot providently plead guilty.
    The plea agreement in this case does not mention the actual maximum possible
    sentence that Miller might have (and did) receive. While a stipulation in a plea
    agreement cannot bind a sentencing court to a particular sentence, plea agreements
    should state the maximum possible sentence that a defendant might receive and, if
    subjected to a sentence above that maximum, waivers of appeal should not be enforced.