United States v. Herbert Green ( 2021 )


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  •                  United States Court of Appeals
    For the Eighth Circuit
    ___________________________
    No. 20-2796
    ___________________________
    United States of America
    Plaintiff - Appellee
    v.
    Herbert G. Green
    Defendant - Appellant
    ____________
    Appeal from United States District Court
    for the Western District of Missouri - Kansas City
    ____________
    Submitted: May 14, 2021
    Filed: August 13, 2021
    ____________
    Before SMITH, Chief Judge, SHEPHERD and GRASZ, Circuit Judges.
    ____________
    GRASZ, Circuit Judge.
    Herbert G. Green twice moved to suppress evidence of guns, ammunition, and
    drug paraphernalia that the Kansas City police seized from his apartment. The
    district court denied both motions. Green conditionally pled guilty to possessing
    firearms in furtherance of a drug trafficking offense, see 
    18 U.S.C. § 924
    (c)(1)(A),
    (c)(1)(A)(i), and was sentenced to 60 months of imprisonment. He now appeals.
    Because we conclude that the record does not contain adequate findings of
    fact for us to resolve Green’s appeal, we remand the case to the district court for the
    limited purpose of making the supplemental findings of fact necessary to resolve
    Green’s Fourth Amendment claims, while retaining jurisdiction.
    I. Background
    One morning in August 2017, Detective Antonio Garcia, who had twenty-two
    years of experience on the police force, was working interdiction (i.e., intercepting
    contraband) at a Federal Express sorting center. Something he had done several
    thousand times before.
    Under an agreement, FedEx allows the police to perform interdiction duties
    only between when the packages arrive (around 6:00 a.m.) and when they leave for
    delivery (around 8:00 a.m.). The agreement also states that officers may only seize
    packages when a narcotics dog (“K9”) alerts to them. The K9s are not allowed near
    the conveyor belt where the packages move through the facility. Officers must bring
    flagged packages to their K9s. If the K9 does not alert to a package, the package
    must be immediately returned to the conveyor belt. The interdiction team cannot
    delay the delivery of any non-seized package.
    On the morning in question, Detective Garcia began his interdiction duties
    around 6:00 a.m. He soon noticed a large “moving” box with a return label from
    Brownsville, Texas—“a source city for illegal narcotics.” The box’s seams were
    glued, which in Detective Garcia’s seventeen years of interdiction experience
    indicates illegal narcotics “100% of the time[.]” Detective Garcia also testified that
    he looks at moving boxes “right away” because they are sturdy and thick, making
    them well suited to contain large amounts of drugs.
    Detective Garcia carried the box 200 feet to the back of the FedEx facility,
    where his K9, Zina, immediately alerted to it. Zina is a certified narcotics dog and
    is “very reliable,” according to Detective Garcia. Detective Garcia told FedEx about
    -2-
    the box and Zina’s alert, filled out the necessary paperwork, and seized it. The entire
    process from when Detective Garcia took the box off the conveyor belt until Zina
    alerted took approximately three minutes. Had Zina not alerted, the box would have
    been returned to the conveyor belt and delivered.
    Officers obtained a state search warrant for the box. They also obtained a
    state anticipatory warrant for the address where the box was to be delivered, which
    allowed the police to enter the address to retrieve the box if it was taken inside. The
    police then conducted a controlled delivery to the box’s mailing address. A detective
    delivered the box to the door of the apartment, but no one was home. He left the
    box at the door. Approximately eight minutes later, Green arrived at the apartment
    while talking on the phone. Officers overheard him tell the person on the other end
    of the call that “the box had arrived.” He then unlocked the apartment door, placed
    the box inside, and left the apartment building.
    Officers promptly arrested Green in the parking lot a few feet from his vehicle.
    A tactical team then entered the apartment to ensure that they could safely execute
    the search warrant. The tactical team immediately saw the box just inside the
    doorway but proceeded to go through every room to look in any place that a person
    could hide. They also looked in the kitchen trashcan, kitchen cabinets, and in a
    shoebox located on top of Green’s bedroom dresser. During the sweep, which took
    around ten minutes, the tactical team saw weapons and marijuana inside the
    apartment. Despite seeing these items in plain view, the team did not seize anything.
    Detective Garcia then entered the residence, performed a walk-through, and
    opened the box. It contained a foam cooler, which in turn contained 24.4 pounds of
    marijuana. Detective Garcia took the box, its contents, and Green’s cell phone back
    to headquarters.
    The officers next obtained a federal search warrant for the apartment. When
    they executed the warrant, the officers recovered an AR-15 rifle from the bedroom
    closet, a pistol, a fully loaded magazine, three other magazines, ammunition, a
    -3-
    bullet-proof vest, a roll of heat-sealed bags, a digital scale, a hand-written ledger,
    five baggies of powder substance, one vacuum sealed bag of marijuana buds, and a
    shoe box with marijuana residue.
    A grand jury indicted Green for attempting to possess a controlled substance
    with intent to distribute, see 
    21 U.S.C. §§ 841
    (a)(1), (b)(1)(D), 846 (Count One),
    possessing a firearm in furtherance of a drug trafficking crime, see 
    18 U.S.C. § 924
    (c)(1)(A), (c)(1)(A)(i) (Count Two), and possessing a firearm as a felon, see
    
    18 U.S.C. §§ 922
    (g)(1), 924(a)(2) (Count Three).
    Green first moved to suppress the evidence seized from his apartment on
    grounds that the officers exceeded the state warrant’s scope. A magistrate judge
    recommended denying the motion and the district court agreed. The district court
    then granted Green leave to challenge whether reasonable suspicion supported the
    seizure of the box at the FedEx facility and whether probable cause supported
    Green’s arrest. Green also moved again to suppress the box’s initial seizure and his
    arrest. The district court adopted the magistrate judge’s recommendation and denied
    that motion as well.
    Green then conditionally pled guilty to Count Two, reserving his right to
    appeal the suppression motion denials. The district court sentenced him to 60
    months of imprisonment. Green now appeals, challenging the constitutionality of
    the box’s initial seizure, his arrest, and the protective sweep.
    II. Analysis
    “A mixed standard of review applies to [] denial[s] of [] motion[s] to suppress
    evidence.” United States v. Williams, 
    777 F.3d 1013
    , 1015 (8th Cir. 2015). We
    review the district court’s findings of fact for clear error and its denials of Green’s
    suppression motions de novo. United States v. Smith, 
    820 F.3d 356
    , 359–60 (8th
    Cir. 2016).
    -4-
    A. The Package’s Initial Seizure
    Green first argues that a seizure occurred when Detective Garcia removed the
    box from the conveyor belt at a FedEx facility and took it to the back of the
    warehouse for Zina to sniff and that Detective Garcia lacked reasonable suspicion to
    support that seizure. We disagree.
    The Fourth Amendment to the Constitution protects “[t]he right of the people
    to be secure in their persons, houses, papers, and effects, against unreasonable
    searches and seizures[.]” See United States v. Ameling, 
    328 F.3d 443
    , 447 (8th Cir.
    2003) (noting that the Fourth Amendment applies to the states through the
    Fourteenth Amendment). In United States v. Va Lerie, we held that a seizure occurs
    when law enforcement “meaningful[ly] interfere[s] with an individual’s possessory
    interests in property[.]” 
    424 F.3d 694
    , 706 (8th Cir. 2005) (en banc). By implication,
    the meaningful-interference requirement means that “not every governmental
    interference with a person’s property constitutes a seizure of that property under the
    Constitution.” 
    Id. at 702
    . Va Lerie involved checked luggage at a bus station but
    approvingly cited several cases applying the same principles to the drug-interdiction-
    of-mail context. 
    Id.
     at 707–08; see United States v. Gomez, 
    312 F.3d 920
    , 923–24
    (8th Cir. 2002) (holding no seizure occurred when a drug-interdiction officer moved
    a package to a command center twenty yards from a conveyor belt in a post office’s
    sorting area); United States v. Vasquez, 
    213 F.3d 425
    , 426 (8th Cir. 2000) (holding
    no seizure occurred when drug-interdiction officers at a FedEx facility had a
    narcotics dog sniff a package).
    In Va Lerie, we held that “the [meaningful-interference] seizure standard
    prohibits the government’s conversion of an individual’s private property, as
    opposed to the mere technical trespass to an individual’s private property.” 
    424 F.3d at 702
    . In fleshing out that standard, we supplied three factors courts should focus
    on when considering whether detaining a package constitutes a seizure: (1) whether
    it delayed a passenger’s travel or significantly impacted the passenger’s freedom of
    movement; (2) whether it delayed the package’s timely delivery; and (3) whether it
    -5-
    deprived the carrier of custody of the item. 
    Id. at 707
    . “If none of these factors is
    satisfied, then no Fourth Amendment seizure has occurred. Conversely, if even a
    single factor is satisfied, then a Fourth Amendment seizure has occurred.” 
    Id.
    “A law enforcement officer must have reasonable suspicion that a piece of
    mail, or a package shipped via a commercial carrier, contains contraband to lawfully
    seize it for investigative purposes.” United States v. Smith, 
    383 F.3d 700
    , 704 (8th
    Cir. 2004). Reasonable suspicion “is a level of suspicion ‘considerably less than
    proof of wrongdoing by a preponderance of the evidence.’ In evaluating whether
    suspicion is reasonable, ‘we must consider the totality of the circumstances—the
    whole picture.’ The inquiry is not ‘readily . . . reduced to a neat set of legal rules.’”
    United States v. Huerta, 
    655 F.3d 806
    , 809 (8th Cir. 2011) (internal citations
    omitted) (quoting United States v. Sokolow, 
    490 U.S. 1
    , 7–8 (1989)). We have held
    that a K9’s positive indication allows an officer to seize a package to further
    investigate it. See United States v. Zacher, 
    465 F.3d 336
    , 338 (8th Cir. 2006). In
    other words, if a K9 alerts to a package, then an officer has reasonable suspicion to
    seize that package.
    So, the key question here is when the seizure took place. If it took place before
    Zina alerted to the box, the only suspicious facts that could support reasonable
    suspicion involve the box’s appearance. On the other hand, if the seizure happened
    post-alert, then the reasonable-suspicion determination can include Zina’s positive
    indication. See, e.g., Zacher, 
    465 F.3d at 338
     (holding a K9’s positive indication
    supports reasonable suspicion).
    Green does not argue that either of the first two Va Lerie factors are met. So,
    whether the box was seized boils down to whether the third Va Lerie factor is met.
    That is, whether Detective Garcia deprived FedEx of custody of the box by removing
    it from the conveyor belt and walking it 200 feet to Zina at the back of the facility.
    See Va Lerie, 
    424 F.3d at 707
    . We conclude that Detective Garcia did not deprive
    FedEx of custody because he was acting at FedEx’s direction. Consideration of our
    case law reveals why.
    -6-
    In Zacher, we held that no seizure occurred when an officer placed a package
    on the floor at the FedEx facility for a K9 sniff. 
    465 F.3d at 339
    . We reasoned that
    “[n]o change in custody occurred when [the detective] placed the package on the
    floor, since a reasonable person could expect FedEx to handle his or her package the
    same way.” 
    Id.
     So, we focused on “the sender’s reasonable expectations of how the
    carrier would handle the package” and said that those expectations “define[d] the
    scope of the carrier’s custody.” 
    Id.
     (citing Va Lerie, 
    424 F.3d at
    707 n.7). From
    Zacher, we know that an officer moving and handling a package does not
    automatically constitute a seizure.
    In Va Lerie, we also applied the sender’s-reasonable-expectation test to the
    custody question. We observed that “a commercial bus passenger who checks his
    luggage should reasonably expect his luggage to endure a fair amount of handling—
    if his luggage were not handled, it would not reach its destination.” 
    424 F.3d at 706
    .
    In applying the test, we wrote that the officers there “removed [the passenger]’s
    checked luggage from the lower luggage compartment to a room inside the terminal
    at [the bus company]’s request.” 
    Id. at 708
     (emphasis added). As a result, we
    concluded that “no Fourth Amendment seizure occurred.” 
    Id.
     at 708–09. The
    conclusion we draw from Va Lerie is that when officers are acting at the carrier’s
    direction and complying with its guidance, a seizure is not likely to have occurred.
    In United States v. Alvarez-Manzo, we concluded that officers acted outside
    the carrier’s direction by moving a bag from the luggage compartment to the
    passenger compartment. 
    570 F.3d 1070
    , 1076–77 (8th Cir. 2009). We distinguished
    the case from Va Lerie by observing that the officer, “not [the bus company], was
    directing the action with respect to [the passenger]’s bag[.]” 
    Id. at 1076
    . The
    holding in Alvarez-Manzo “did not turn on where law enforcement took the bag but
    at whose direction law enforcement acted when it did so.” 
    Id. at 1076
    . Alvarez-
    Manzo helpfully describes the holding in Va Lerie as well: “Va Lerie provides that
    law enforcement did not deprive [the bus company] of its custody of [the
    passenger]’s bag because, although law enforcement had physical possession of the
    bag, [the bus company] was directing the action in terms of what law enforcement
    -7-
    could do with [the passenger]’s bag.” 
    Id.
     (emphasis added). Reading these three
    cases together, it is clear that the third Va Lerie factor (whether the carrier was
    deprived of custody) turns more on whose direction law enforcement followed,
    rather than where the package was briefly taken.
    Green disputes this conclusion, arguing that acting under the direction of the
    carrier means that the carrier’s employee must specifically identify the parcel as
    suspicious. We disagree. Green’s reading of Alvarez-Manzo does not account for
    Va Lerie’s facts. There, the carrier did not direct law enforcement to the suspicious
    luggage. 
    424 F.3d at 696
    . Instead, the opposite happened. 
    Id.
     The carrier’s
    “direction” in Va Lerie was limited to general designations about where to bring the
    luggage after the officer had identified it as suspicious. 
    Id. at 708
    . Va Lerie is like
    our case because Detective Garcia identified the box as suspicious and acted at the
    direction of FedEx by taking the package to the location FedEx designated for K9
    sniffs. Taking Alvarez-Manzo and Va Lerie together requires that we reject Green’s
    suggestion that a carrier official must be the first to identify a parcel as suspicious.
    This rule would not comport with Va Lerie nor many cases it approvingly cited. See,
    e.g., United States v. Ward, 
    114 F.3d 1024
    , 1027–28 (7th Cir. 1998) (involving law
    enforcement first identifying suspicious luggage); United States v. Johnson, 
    990 F.2d 1129
    , 1130–31 (9th Cir. 1993) (same).
    We therefore hold that the third Va Lerie factor is not met here because when
    Detective Garcia briefly moved the box, he did so at FedEx’s direction. This leads
    us to conclude that Detective Garcia did not seize the box until after Zina alerted to
    its contents, at which point there was clearly reasonable suspicion to support the
    seizure. See Zacher, 
    465 F.3d at 338
     (noting a K9’s positive indication is enough
    for reasonable suspicion).1
    1
    Based on our conclusion that Detective Garcia did not seize the box when he
    initially removed it from the conveyor belt and carried it to the back of the facility
    for the K9 sniff, we need not reach the district court’s alternative holding that
    reasonable suspicion also supported seizing the box from the outset.
    -8-
    B. Green’s Arrest
    Green next argues that the officers lacked probable cause to arrest him after
    he took delivery of the box and put it inside his apartment. Again, we disagree.
    Probable cause is required for a warrantless arrest. United States v. Houston,
    
    548 F.3d 1151
    , 1154 (8th Cir. 2008). “An officer has probable cause to make a
    warrantless arrest when the facts and circumstances are sufficient to lead a
    reasonable person to believe that the defendant has committed or is committing an
    offense.” Royster v. Nichols, 
    698 F.3d 681
    , 688 (8th Cir. 2012) (quoting Fisher v.
    Wal-Mart Stores, Inc., 
    619 F.3d 811
    , 816 (8th Cir. 2010)). Our precedent does not
    require that arresting officers witness a crime or have all the evidence needed to
    sustain a conviction; instead, officers only need a “probability or substantial chance
    of criminal activity, rather than an actual showing of criminal activity[.]” United
    States v. Winarske, 
    715 F.3d 1063
    , 1067 (8th Cir. 2013); accord United States v.
    Mendoza, 
    421 F.3d 663
    , 667 (8th Cir. 2005). “Law enforcement officers have
    ‘substantial latitude in interpreting and drawing inferences from factual
    circumstances.’” United States v. Henderson, 
    613 F.3d 1177
    , 1181 (8th Cir. 2010)
    (emphasis added) (quoting United States v. Washington, 
    109 F.3d 459
    , 465 (8th Cir.
    1997)).
    Here, Detective Garcia initially suspected that the box contained drugs
    because it was (1) a moving box, (2) shipped from a source city, and (3) had a glued-
    shut lid. Zina, a reliable drug dog, then alerted to the box. See United States v.
    Donnelly, 
    475 F.3d 946
    , 955 (8th Cir. 2007) (holding a K9 alerting to a package
    supports probable cause to believe drugs are present). Later, Detective Garcia
    witnessed Green place the box inside the apartment where it was delivered. See
    United States v. Brown, 
    929 F.3d 1030
    , 1037 (8th Cir. 2019) (holding the delivery
    of a drug-filled package to a specific address provided probable cause for the search
    of the apartment). Detective Garcia also heard Green say, “[t]he box is here” just
    before Green placed it inside the apartment. As the district court noted, his
    “familiarity with the [box] suggested he probably knew what was inside.”
    -9-
    Green argues that the officers lacked enough information to support probable
    cause to arrest him. For all they knew, Green theorizes, he could have been helping
    a friend by getting their mail. But probable cause only requires showing a
    “substantial chance of criminal activity, rather than an actual showing of criminal
    activity[.]” Winarske, 715 F.3d at 1067.
    We conclude that the box’s suspicious appearance and Zina’s alert, together
    with Green picking up the box, placing it inside the apartment, and demonstrating
    his familiarity with that specific box supported probable cause to arrest him.
    C. The Protective Sweep
    Green last argues that the lengthy protective sweep of his entire apartment was
    unconstitutional because the anticipatory warrant only authorized the officers to
    seize one item (the box), which they found just inside the front door. He claims that
    the tactical team “saw the only item they could seize pursuant to the anticipatory
    warrant, chose not to seize it and exit the premises, and proceeded to walk through
    the entire apartment for ten to fifteen minutes looking under a mattress, in the kitchen
    trash can, in kitchen cabinets, and at or in a shoe box.” On this point, we agree with
    Green.
    As usual in the Fourth Amendment context, reasonableness controls the
    analysis when it comes to “the method of execution of [a] warrant.” United States
    v. Ramirez, 
    523 U.S. 65
    , 71 (1998). “[T]he search of a residence is generally
    unreasonable ‘without a warrant issued on probable cause.’” United States v.
    Waters, 
    883 F.3d 1022
    , 1026 (8th Cir. 2018) (quoting Maryland v. Buie, 
    494 U.S. 325
    , 331 (1990)). But “[a]n exception to the general warrant requirement of the
    Fourth Amendment is the protective sweep.” 
    Id.
     A protective sweep “is narrowly
    confined to a cursory visual inspection of those places in which a person might be
    hiding.” 
    Id.
     “During a properly limited protective sweep, the police may seize an
    item that is in plain view if its incriminating character is ‘immediately apparent.’”
    -10-
    United States v. Green, 
    560 F.3d 853
    , 856 (8th Cir. 2009) (quoting Horton v.
    California, 
    496 U.S. 128
    , 136 (1990)).
    In Buie, the Supreme Court addressed when and how officers may conduct a
    protective sweep in the context of one conducted incident to an arrest. 
    494 U.S. at 334
    . First, the Court held that, as a matter of course, officers may look in spaces
    “immediately adjoining the place of arrest from which an attack could be
    immediately launched.” 
    Id.
     Second, the Court held that to sweep beyond those
    “immediately adjoining” spaces, officers must have reasonable suspicion to believe
    dangerous individuals are hiding in the area to be swept. 
    Id. at 334, n.2
    .
    In the executing-a-search-warrant context, we have held that officers may
    conduct a protective sweep. See United States v. Jones, 
    471 F.3d 868
    , 874–75 (8th
    Cir. 2006). But what type of sweep can officers conduct while executing a search
    warrant?
    Here, the district court concluded that the officers justifiably swept Green’s
    apartment based on language in Bailey v. United States, 
    568 U.S. 186
    , 194 (2013).
    Bailey said that a “search for narcotics is the kind of transaction that may give rise
    to sudden violence[.]” 
    568 U.S. at 194
     (quoting Michigan v. Summers, 
    452 U.S. 692
    , 702 (8th Cir. 1981)). In such situations, the Court said that law enforcement
    can “secure the premises” to “exercise unquestioned command of the situation.” 
    Id.
    at 194–95. But Bailey dealt with questions about law enforcement’s authority to
    detain people both on and off the premises while executing a warrant. It did not
    decide when officers may execute a protective sweep incident to the execution of a
    search warrant.
    While Bailey did not address that question, we did in United States v. Waldner,
    
    425 F.3d 514
     (8th Cir. 2005), and again in United States v. Rodriguez, 
    834 F.3d 937
    (8th Cir. 2016). In Waldner, we stated that “Buie authorizes protective sweeps for
    unknown individuals in a house who may pose a threat to officers as they effectuate
    an arrest; Buie does not allow a protective sweep for weapons or contraband.” 425
    -11-
    F.3d at 517. And, in Waldner, we held that in the context of a non-arrest situation,
    conducting a protective sweep “requires a showing of a reasonable suspicion of
    dangerous individuals in the house.” 
    Id.
     We reaffirmed the rule from Waldner in
    Rodriguez. Rodriguez, 834 F.3d at 942 (“[A] protective sweep in the absence of an
    arrest or reasonable suspicion of dangerous individuals was clearly illegal under
    Waldner.”). Here, just like in Waldner and Rodriguez, we are dealing with a
    protective sweep in the context of a non-arrest situation (i.e., executing a search
    warrant). 2
    The government tries to distinguish Waldner and Rodriguez because the
    former involved serving a protective order and the latter involved entering a house
    with consent. But Waldner and Rodriguez are clear: In a non-arrest context, a
    protective sweep requires reasonable suspicion of dangerous individuals inside from
    the outset. See Waldner, 
    425 F.3d at 517
    ; Rodriguez, 834 F.3d at 942. Because the
    government does not argue that the officers had reasonable suspicion to believe that
    dangerous individuals were present in Green’s apartment before they began the
    protective sweep, we conclude that the protective sweep of Green’s apartment
    violated the Fourth Amendment.
    Even assuming a protective sweep of Green’s apartment was valid, the scope
    of the sweep here also violated the Constitution. The Supreme Court has held that a
    protective sweep “may extend only to a cursory inspection of those spaces where a
    person may be found.” Buie, 
    494 U.S. at 335
    . A protective sweep must be “quick
    2
    The government does not argue that Green’s arrest outside the apartment
    justified a protective sweep of his apartment. Even so, we note that the government
    would need to point to “articulable facts and rational inferences supporting the
    officers’ reasonable beliefs that someone else could be inside posing a danger to
    them during or following the arrest.” United States v. Alatorre, 
    863 F.3d 810
    , 814–
    15 (8th Cir. 2017) (holding a protective sweep of a residence was justified after
    officers removed the arrestee to the porch where there were specific facts indicating
    the clear possibility that dangerous individuals and weapons were inside). The
    government did not point us to any such facts, beyond the general drug context, here.
    -12-
    and limited” and “initially confined to places large enough to conceal a person.”
    United States v. Boyd, 
    180 F.3d 967
    , 976 (8th Cir. 1999) (quoting Buie, 
    494 U.S. at 327
    ); see Alatorre, 863 F.3d at 815 (holding a task force conducted a constitutional
    protective sweep “because it lasted only two minutes and was confined to places
    large enough to hide a person”). Here, a team of officers performed a “sweep” of
    Green’s apartment that lasted around ten minutes and included looking inside
    kitchen cupboards, trash cans, and even inside a shoebox. This exhaustive search
    far exceeded the permissible bounds of a protective sweep both in the time it took
    for a team of officers to “sweep” the apartment and the places that were searched.
    Cf. United States v. Thompson, 
    2021 WL 3136048
    , at *1, *3 (8th Cir. July 26, 2021)
    (holding the sweep of a house was justified where the suspicious conduct of people
    inside and the defendant’s criminal history involving concealed weapons supported
    the officers’ reasonable suspicion that dangerous individuals were present in the
    home). We therefore conclude that, even if a protective sweep of Green’s apartment
    was valid, the scope of the sweep violated the Fourth Amendment.
    D. Independent Source Doctrine
    Considering our conclusion that the protective sweep of Green’s apartment
    violated the Constitution, we next ask whether an exception to the exclusionary rule
    applies. See Utah v. Strieff, 
    136 S. Ct. 2056
    , 2061 (2016) (laying out multiple
    exceptions to the exclusionary rule); see also Hudson v. Michigan, 
    547 U.S. 586
    ,
    591 (2006) (“Suppression of evidence . . . has always been [a] last resort, not [the]
    first impulse.”). The government argues that the independent source doctrine works
    to prevent exclusion here.3
    3
    While the district court did not rely on the independent source doctrine
    below, “[w]e may affirm the district court’s denial of a motion to suppress on any
    ground the record supports.” United States v. Murillo-Salgado, 
    854 F.3d 407
    , 414
    (8th Cir. 2017) (quotation omitted); see, e.g., United States v. Perez-Trevino, 
    891 F.3d 359
    , 367 (8th Cir. 2018) (affirming the denial of a motion to suppress on a
    different ground than the district court); United States v. Brandwein, 
    796 F.3d 980
    ,
    984 (8th Cir. 2015) (same).
    -13-
    “The independent source doctrine allows admission of ‘evidence initially
    discovered during, or as a consequence of, an unlawful search, but later obtained
    independently from activities untainted by the initial illegality.’” United States v.
    Anguiano, 
    934 F.3d 871
    , 874 (8th Cir. 2019) (quoting Murray v. United States, 
    487 U.S. 533
    , 537 (1988)); see Strieff, 136 S. Ct. at 2061. To invoke the doctrine, the
    government must show “(1) that the decision to seek the warrant was independent
    of the unlawful entry—i.e., that police would have sought the warrant even if the
    initial entry had not occurred—and (2) that the information obtained through the
    unlawful entry did not affect the magistrate’s decision to issue the warrant.” United
    States v. Khabeer, 
    410 F.3d 477
    , 483 (8th Cir. 2005) (emphasis added); accord
    United States v. Swope, 
    542 F.3d 609
    , 613–14 (8th Cir. 2008).
    Here, there is an argument that the independent source doctrine applies. Apart
    from the protective sweep, the officers would still have discovered that, as suspected,
    the box contained drugs. And the officers saw Green place the box inside the
    apartment after indicating that he recognized it. So, there was clear evidence
    associating a box containing drugs with the apartment. Even without the protective
    sweep, then, the officers may have obtained a warrant to search Green’s apartment.
    See Swope, 
    542 F.3d at 615
     (holding a search warrant obtained after an unlawful
    The government also argues that the good-faith exception to the exclusionary
    rule applies. See United States v. Leon, 
    468 U.S. 897
    , 920–21 (1984) (“[W]hen an
    officer acting with objective good faith has obtained a search warrant from a judge
    or magistrate and acted within its scope . . . there is no police illegality and thus
    nothing to deter.”); see also United States v. Cannon, 
    703 F.3d 407
    , 413 (8th Cir.
    2013) (“For the Leon exception to apply when the warrant is based on evidence
    obtained through a Fourth Amendment violation, the detectives’ prewarrant conduct
    must have been ‘close enough to the line of validity to make the officers’ belief in
    the validity of the warrant objectively reasonable.’” (quoting United States v.
    Conner, 
    127 F.3d 663
    , 667 (8th Cir. 1997))). But the good-faith exception does not
    apply here because the scope of the protective sweep—a ten-minute long exhaustive
    search of every nook and cranny of Green’s apartment—was clearly illegal under
    our precedent. See, e.g., Boyd, 
    180 F.3d at 976
     (holding a protective sweep must be
    “quick and limited” and “initially confined to places large enough to conceal a
    person”).
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    search was an independent source for physical evidence because the officers’
    decision to seek the warrant did not depend on the unlawful search and the redacted
    warrant application still supported probable cause); United States v. Craig, 
    630 F.3d 717
    , 722 (8th Cir. 2011) (same).
    But just like in Khabeer, we must remand so that the district court has an
    opportunity to “explicitly find” whether “the agents would have sought a warrant if
    they had not earlier” conducted a lengthy protective sweep of Green’s apartment.
    
    410 F.3d at 484
     (quoting Murray, 
    487 U.S. at 543
     (“[I]t is the function of the
    [d]istrict [c]ourt rather than the [c]ourt of [a]ppeals to determine the facts” and
    concluding that the possible inferences to be drawn from the record are not “clear
    enough to justify the conclusion that the [d]istrict [c]ourt’s findings amounted to a
    determination of independent source.”)).
    III. Conclusion
    For these reasons, we retain jurisdiction over this appeal, but remand to the
    district court for the limited purpose of making findings of fact as to whether the
    officers’ decision to seek a search warrant for Green’s apartment was prompted by
    what the officers observed when they conducted their protective sweep.
    ______________________________
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