United States v. Hernandez-Mieses , 931 F.3d 134 ( 2019 )


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  •           United States Court of Appeals
    For the First Circuit
    Nos. 18-1661, 18-1664
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    SANDY HERNANDEZ-MIESES,
    Defendant, Appellant.
    APPEALS FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF PUERTO RICO
    [Hon. Juan M. Pérez-Giménez, U.S. District Judge]
    Before
    Torruella, Lipez, and Thompson,
    Circuit Judges.
    Rafael F. Castro Lang for appellant.
    Francisco A. Besosa-Martínez, Assistant United States
    Attorney, with whom Rosa Emilia Rodríguez-Vélez, United States
    Attorney, and Mariana E. Bauzá-Almonte, Assistant United States
    Attorney, Chief, Appellate Division, were on brief, for appellee.
    July 31, 2019
    LIPEZ, Circuit Judge.          Sandy Hernandez-Mieses appeals
    from the district court's partial denial of his motion to suppress
    evidence seized from his home on the day of his arrest on drug and
    money laundering charges in Cataño, Puerto Rico.                 Specifically, he
    challenges     the    district     court's     conclusion     that   federal   law
    enforcement agents validly relied on exceptions to the warrant
    requirement when they searched his home, a cargo van inside his
    garage, and a minivan parked in his driveway.                    He also asserts
    more broadly that the entire operation was tainted by the agents'
    unlawful intention to execute a warrantless search even before
    they entered his home to execute the arrest warrant.
    After     careful      review,    we   affirm     the   district    court's
    determination that a gun, cellphones, and cash were lawfully seized
    from the first floor, and we reject Hernandez-Mieses's contention
    that the entire operation was tainted.            However, because we cannot
    determine on this record that the cellphones on the second floor
    and the drugs in the cargo van were lawfully seized, we vacate the
    district court's denial of suppression as to those items and remand
    for further findings concerning the duration and scope of the
    purported protective sweep.            We also vacate and remand as to the
    application of the automobile exception to the cargo van so that
    the   district       court   can   reconsider     the    issue    based   on   its
    conclusions regarding the sweep.             Finally, we vacate the district
    court's order as to the items seized from the minivan and remand
    - 2 -
    so that the district court can determine in the first instance
    whether the minivan was within the curtilage of Hernandez-Mieses's
    home.
    I.
    We   recount   the    facts   as       found   by   the     district   court,
    consistent with record support, with the addition of undisputed
    facts drawn from the suppression hearing.                   See United States v.
    Dancy, 
    640 F.3d 455
    , 458 (1st Cir. 2011).                   Hernandez-Mieses was
    charged,       along   with    five      co-defendants,       in     a   seven-count
    indictment alleging a conspiracy to import and distribute cocaine.
    These charges arose from "Operation Beach Break," a maritime drug
    smuggling investigation by the Caribbean Corridor Strike Force of
    Homeland Security Investigations ("HSI").
    On November 1, 2016, federal agents executed an arrest warrant
    for Hernandez-Mieses at his home outside San Juan.                          Among the
    agents       was   Ricardo    Nazario,     a    special     agent    with    HSI   for
    approximately sixteen years and a group supervisor with the Strike
    Force for the previous seven.              Nazario had previously surveilled
    Hernandez-Mieses at this home and knew that he used a wheelchair.
    Before executing the arrest warrant, Nazario briefed the other
    agents on the high probability that they might encounter weapons,
    narcotics, and cash inside the house.              Approximately twenty agents
    with ten vehicles were involved in executing the arrest warrant,
    - 3 -
    and they were accompanied by Honzo, a Customs and Border Protection
    dog trained to detect both concealed humans and narcotics.
    The    agents    arrived   at     what        Nazario    described   as     an
    "average"-sized, two-story house at around 5:45 AM.               Upon arrival,
    Nazario noticed that the first floor lights were on and observed
    shadows of several individuals through the frosted-glass front
    windows.      Nazario   was   not    expecting       that    people   other    than
    Hernandez-Mieses would be in the house, or that anybody would be
    awake at the time.      He approached the frosted-glass front door,
    accompanied by another special agent, and announced himself as the
    police.     He then saw the shadow of a person approach the front
    door and lock it from the inside.             Nazario and the other agent
    broke the frosted glass in two places and looked through the
    openings.     From the photographs admitted into evidence at the
    suppression hearing and Nazario's testimony, it appears that the
    first floor was essentially an open space with four modes of
    egress: the front door; sliding doors leading to the back terrace;
    a side door leading from the kitchen to the pool area and garage;
    and stairs leading to the second floor.
    Nazario    saw   Hernandez-Mieses        in    his   wheelchair    near    the
    dining table with two other individuals.              Nazario reached through
    one of the holes in the door, unlocked it, and chased the two men,
    who fled through the back terrace doors and jumped the property's
    rear fence.      During this initial brief pursuit, other agents
    - 4 -
    entered the house behind Nazario and handcuffed Hernandez-Mieses.
    All told, approximately ten agents entered the house and ten
    remained outside to secure the perimeter, which was accomplished
    shortly after the arrest.
    Having lost the fleeing individuals,1 Nazario returned from
    the terrace and observed a Glock handgun on the kitchen counter,
    approximately ten feet from where Hernandez-Mieses was sitting and
    close to the staircase leading to the second floor.     The agents
    observed four cellphones and a bag with cash on the dining table.2
    Nazario also observed that the door from the kitchen to the
    adjacent swimming pool area and garage was open.
    Nazario then ordered what he characterized as a protective
    sweep of the house based on his expressed concern that there could
    be people hiding who might pose a threat to the agents.3     Honzo
    accompanied the agents during the sweep.     After taking five to
    1 Nazario directed two agents who were securing the perimeter
    to pursue the men who fled. One man, Yonathan Jimenez-Diaz, was
    apprehended a few blocks away, while the other, Oniel Lajara-De La
    Cruz, remained a fugitive at the time of the suppression hearing.
    2The relationship between the bag and the cash is not entirely
    clear from the record -- that is, it is unclear whether the cash
    was outside the bag or inside the bag but nonetheless visible.
    Regardless, Hernandez-Mieses has not contended that the agents had
    to open or otherwise manipulate the bag to observe the cash.
    3 Nazario and the government referred to a "security sweep"
    throughout the suppression hearing, but we will use the more common
    "protective sweep," as the parties do in their briefing.
    - 5 -
    seven minutes to sweep the first floor, including a bathroom, the
    agents   proceeded   to   the    second   floor,    where   they   swept   two
    bedrooms, two bathrooms, and a master bedroom.               In one of the
    bedrooms, Honzo alerted to a bag in front of the bed containing
    four kilograms of cocaine.        Nazario also observed four cellphones
    on the bed in that room.        In the master bedroom, Honzo "alerted to
    and opened" a shoebox inside the closet, which contained $34,000
    in cash.
    The agents proceeded through the open door off the kitchen to
    the garage, where they saw a cargo van.4           Nazario touched the hood
    of the cargo van, which was hot; noticed that the tires were
    covered with sand and mud and that there was water dripping from
    the cargo area; and smelled saltwater and fuel.
    Nazario, who was accompanied by five other agents, said he
    opened the cargo van's unlocked rear doors to "[s]earch[] for
    people hiding."      Inside, Nazario observed more than forty wet,
    sandy bales of what he took to be narcotics.5               The agents also
    4 The frosted-glass garage door opening onto the driveway was
    closed.
    5 The bales were marked with different logos (for example,
    "Harley Davidson Motorcycles," "NBA," and a smiley face) that
    Nazario recognized, based on his experience, as the type of marking
    drug traffickers use to identify drug deliveries. The district
    court found, and the record supports, that Honzo alerted at the
    bales after the van was opened.      At some point, a field test
    confirmed that the bales contained approximately 1,700 kilograms
    of cocaine.
    - 6 -
    looked in a closet next to the van.                According to Nazario, the
    sweep was completed once the agents swept the garage, approximately
    twenty-two minutes after they arrived at the house.6
    The agents then called a government attorney, who told them
    that they could perform a full search of the house.               Before doing
    so, however, Nazario approached the minivan parked in the driveway
    in   front     of   the   garage   door,   which    he   had   previously   seen
    Hernandez-Mieses driving.          Nazario observed sand on the tires and
    interior carpet, and he touched the hood, ascertaining that it was
    hot.       Using keys located on top of the dining table, the agents
    unlocked the minivan and searched the interior. Among other items,
    they found a loaded Glock in the compartment between the two front
    seats, a paper bag full of money in front of that compartment, and
    a wallet in the passenger door containing identification documents
    for Lajara-De La Cruz.7        The agents then performed a comprehensive
    6
    The district court supportably found, based on call logs in
    the record, that "between 5:45 a.m. and 6:07 a.m. (22 minutes),
    the law enforcement agents arrived at the scene, arrested
    Hernandez, [and] performed [the] protective sweep." United States
    v. Hernandez-Mieses, 
    257 F. Supp. 3d 165
    , 174 n.8 (D.P.R. 2017).
    Nazario indicated that the agents also swept the perimeter areas
    of the house (such as the pool area and back terrace), but it is
    unclear when this was done.     Nazario did not suggest that the
    agents who swept the house's interior also swept the perimeter.
    7
    At some point, agents also searched another vehicle parked
    in front of the house, but nothing was seized. That vehicle was
    registered to Hernandez-Mieses. The minivan was registered to his
    wife, and the cargo van was registered to a third party.
    - 7 -
    search of the house and seized multiple incriminating items,
    including cash, a firearm, and ammunition.
    After his arrest and the search, Hernandez-Mieses was charged
    in a second indictment along with Jimenez-Diaz and Lajara-De La
    Cruz.     Hernandez-Mieses filed a motion to suppress all evidence
    seized from his house on the day of his arrest.     After a hearing,
    at which agent Nazario was the sole witness, the district court
    suppressed the drugs and cash found by Honzo on the second floor
    and all evidence seized during the warrantless search of the house
    conducted after the agents called the government attorney.     But it
    declined to suppress the gun and cash found on the first floor,
    the cellphones found in the bedroom on the second floor, the drugs
    found in the cargo van, and the items found in the minivan.    After
    the district court denied his motion for reconsideration, which
    focused on the cargo van, Hernandez-Mieses entered a joint straight
    plea to both indictments, reserving his right to appeal the
    district court's suppression order.      He was sentenced to a total
    of 180 months of imprisonment on the two indictments.    This timely
    appeal followed.
    II.
    When reviewing a district court's denial of a motion to
    suppress, we ordinarily assess the district court's findings of
    fact for clear error and its conclusions of law de novo.      United
    States v. Ackies, 
    918 F.3d 190
    , 197 (1st Cir. 2019).          If the
    - 8 -
    evidence at issue was seized during a warrantless search, "it is
    the government's burden to demonstrate the legitimacy of the
    search."     United States v. Winston, 
    444 F.3d 115
    , 123-24 (1st Cir.
    2006).
    The   Fourth      Amendment        protects      all     persons     "against
    unreasonable search and seizures." U.S. Const. amend. IV. Because
    "physical entry of the home is the chief evil against which the
    wording of the Fourth Amendment is directed," Payton v. New York,
    
    445 U.S. 573
    , 585 (1980)(internal quotation marks omitted), "a
    warrantless     search    of     a    private       residence   is   presumptively
    unreasonable     unless    one       of   a   few    well-delineated      exceptions
    applies," United States v. Infante, 
    701 F.3d 386
    , 392 (1st Cir.
    2012). Hernandez-Mieses concedes that the agents possessed a valid
    arrest warrant, which entitled them to enter his home to arrest
    him.     See Payton, 
    445 U.S. at 603
    .                 But he contends that the
    agents' actions were tainted because they also intended to perform
    a warrantless search of his home.                   Moreover, regardless of the
    agents' intent, he contends that their actions did not fit any
    exception to the warrant requirement and were therefore unlawful;
    in particular, he argues that the agents were not effectuating a
    lawful protective sweep when they spotted the cellphones in the
    second floor bedroom and the drugs in the cargo van.                   Finally, he
    contends that the agents had no lawful basis for searching the
    minivan in the driveway.
    - 9 -
    A.   Agents' Intention to Perform a Warrantless Search
    Hernandez-Mieses      contends    that   the    agents'    actions    were
    tainted from the start by a pre-existing intention to perform a
    warrantless search of his entire home before they had any basis
    for doing so.      Because he did not raise this argument before the
    district court, it may well be deemed waived.                 See, e.g., United
    States v. Reyes-Rivas, 
    909 F.3d 466
    , 470 n.2 (1st Cir. 2018).                But
    even if it was not forfeited or waived, the argument is plainly
    without   merit.      As    a   matter   of   law,    "[a]    police   officer's
    subjective motive, even if improper, cannot sour an objectively
    reasonable search."        Spencer v. Roche, 
    659 F.3d 142
    , 149 (1st Cir.
    2011).    We also reject the factual premise of Hernandez-Mieses's
    argument.     To support his contention that the agents harbored a
    pre-existing intention to perform a warrantless search, Hernandez-
    Mieses points to Nazario's briefing of the other agents, during
    which Nazario told them that "there was a high probability of
    finding weapons, narcotics, and currency in the house."                 But, as
    Nazario   explained    during     his    testimony,     this     statement   can
    reasonably be understood as a notice or reminder to his colleagues
    that   they   were    likely    to   "encounter       those    items   [weapons,
    narcotics, and currency] inside the house."                  Indeed, the agents
    did encounter a weapon and cash in plain view while arresting
    Hernandez-Mieses.      We discern no suggestion of an intention to
    perform a warrantless search from Nazario's briefing.
    - 10 -
    Hernandez-Mieses also points to the agents' use of Honzo.
    Specifically, he asserts that they brought Honzo into the house as
    soon as they entered to arrest Hernandez-Mieses, suggesting that
    they intended to use the dog to effect a warrantless search from
    the   start.   But   again,   Hernandez-Mieses   misreads   the   facts.
    Nazario's testimony is clear that although Honzo "tagged along"
    with the agents when they went to the house to execute the arrest
    warrant, the dog did not enter until Nazario ordered the sweep.8
    Accordingly, we reject Hernandez-Mieses's argument both as a
    matter of law and of fact.
    B. Seizure of Cash, Cellphones, and Gun from First Floor (Plain
    View)
    The district court determined that the government lawfully
    seized the cash and four cellphones from the dining table and the
    gun from the kitchen counter pursuant to the "plain view" doctrine.
    That doctrine "permits the warrantless seizure of an item if the
    officer is lawfully present in a position from which the item is
    clearly visible, there is probable cause to seize the item, and
    the officer has a lawful right of access to the item itself."
    United States v. Gamache, 
    792 F.3d 194
    , 199 (1st Cir. 2015).         We
    8The record is not entirely clear as to whether Honzo entered
    the house at the start of the sweep or entered when the agents
    proceeded to the second floor. In any event, this distinction is
    immaterial to our analysis.
    - 11 -
    review a district court's conclusion that the plain view doctrine
    applies for clear error.     See 
    id.
    Hernandez-Mieses has offered no developed argument that the
    district court erred in applying the plain view doctrine, and any
    such argument is therefore waived.          See United States v. Zannino,
    
    895 F.2d 1
    , 17 (1st Cir. 1990).      What is more, even absent waiver,
    this contention of error would be unavailing.           By virtue of the
    arrest warrant, the agents were lawfully in a position from which
    the cash, cellphones, and gun "were easily visible to the naked
    eye," United States v. Sanchez, 
    612 F.3d 1
    , 5 (1st Cir. 2010), and
    the incriminating nature of those items as common tools of the
    drug trade was apparent.       See Minnesota v. Dickerson, 
    508 U.S. 366
    , 375 (1993); see also United States v. Martinez-Molina, 
    64 F.3d 719
    , 728 (1st Cir. 1995) (recognizing that cellphones are
    known    tools   of   the   drug    trade).        We   therefore   reject
    Hernandez-Mieses's contention that the cash, cellphones, and gun
    should be suppressed.
    C. Seizure of Cellphones from Second Floor and Drugs from Cargo
    Van (Protective Sweep)
    The district court determined that the agents lawfully seized
    the four cellphones from the upstairs bedroom and the drugs from
    the cargo van because they were found during a lawful protective
    sweep.   Hernandez-Mieses does not contest that the cellphones were
    in plain view to anyone in the upstairs bedroom, or that the drug
    - 12 -
    bales were in plain view once the agents opened the cargo van.9
    Rather, he contends that the agents did not have a right to enter
    the upstairs bedroom or open the cargo van because they were not
    executing a protective sweep when they accessed those locations.
    We review de novo the question of whether a warrantless search was
    a permissible protective sweep.      Winston, 
    444 F.3d at 118
    .
    1. Applicable Law
    The Supreme Court has described a "protective sweep" as "a
    quick and limited search of premises," usually incident to an
    arrest, that is "conducted to protect the safety of police officers
    or others" at the scene.        Maryland v. Buie, 
    494 U.S. 325
    , 327
    (1990).       Such a search is "narrowly confined to a cursory visual
    inspection of those places in which a person might be hiding."
    Id.10        For law enforcement to justify a protective sweep, the
    officers must have a "reasonable suspicion of danger," that is,
    "there must be articulable facts which, taken together with the
    rational inferences from those facts, would warrant a reasonably
    9
    See United States v. Banks, 
    884 F.3d 998
    , 1015-16 (10th Cir.
    2018) ("Generally, officers can seize any incriminating items that
    they find in plain view during a protective sweep.").
    10
    The Court in Buie also noted that, "as a precautionary
    matter and without probable cause or reasonable suspicion,"
    officers are permitted to "look in closets and other spaces
    immediately adjoining the place of arrest from which an attack
    could be immediately launched." 
    494 U.S. at 334
    . That type of
    warrantless search is not at issue in this case because the
    cellphones on the second floor and the drugs in the cargo van were
    not found in immediate proximity to Hernandez-Mieses.
    - 13 -
    prudent officer in believing that the area to be swept harbors an
    individual posing a danger to those on the arrest scene."                
    Id. at 334
    . "[A] mere 'inchoate and unparticularized suspicion or hunch'"
    that someone is hiding who could pose a danger to the arresting
    officers is not enough to support a protective sweep.              
    Id. at 332
    (quoting Terry v. Ohio, 
    392 U.S. 1
    , 27 (1968)). But the reasonable
    suspicion standard "is considerably less demanding than the level
    of   proof   required   to   support   a   finding   of   probable   cause."
    Winston, 
    444 F.3d at 118
    .         And we are ordinarily hesitant to
    second-guess an officer's determination that a protective sweep is
    necessary:    "[T]he    experienced    perceptions   of    law   enforcement
    agents   deserve   deference    and    constitute    a    factor    in    [the]
    reasonable suspicion analysis."        
    Id. at 119
    .
    Reasonable suspicion, however, is just part of the analysis.
    A protective sweep also must be limited in scope to "a cursory
    visual inspection of those places in which a person might be
    hiding."     Buie, 
    494 U.S. at 327
    ; see also United States v.
    Nascimento, 
    491 F.3d 25
    , 49 (1st Cir. 2007) (assuming that a
    protective sweep would not allow looking inside a cabinet "too
    small to accommodate a person").           And, of crucial importance in
    this case, a protective sweep must be limited in duration and
    "last[] no longer than is necessary to dispel the reasonable
    suspicion of danger and in any event no longer than it takes to
    - 14 -
    complete the arrest and depart the premises."        Buie, 
    494 U.S. at 335-36
    .
    The sweep in Buie, the case in which the Supreme Court first
    articulated the modern protective sweep doctrine, illustrates the
    type of cursory search that the doctrine contemplates. The Supreme
    Court described Buie's arrest and the ensuing sweep as follows:
    Once inside [the house to execute the arrest warrant],
    the officers fanned out through the first and second
    floors. Corporal James Rozar announced that he would
    "freeze" the basement so that no one could come up and
    surprise the officers. With his service revolver drawn,
    Rozar twice shouted into the basement, ordering anyone
    down there to come out . . . . Eventually, a pair of
    hands appeared around the bottom of the stairwell
    and Buie emerged from the basement. He was arrested,
    searched, and handcuffed by Rozar. Thereafter, [another
    officer] entered the basement "in case there was someone
    else" down there. He noticed a red running suit lying
    in plain view on a stack of clothing and seized it.
    Buie, 
    494 U.S. at 328
     (citation omitted).11         Thus, the sweep in
    Buie was demonstrably a cursory scan of the area from which the
    defendant had just emerged after initially hiding from the officers
    who   had   come   to   arrest   him.   See   Cursory,   Merriam-Webster
    Dictionary,        https://www.merriamwebster.com/dictionary/cursory
    (defining "cursory" as "rapidly and often superficially performed
    or produced").
    11
    The Court in Buie remanded for the state court to apply the
    newly enunciated standard for protective sweeps to the basement
    search at issue.
    - 15 -
    Consistent with Buie, courts have typically approved only
    short   sweeps   when   expressly    considering   duration   in   cases
    involving the sweep of a home.      See United States v. Alatorre, 
    863 F.3d 810
    , 815 (8th Cir. 2017) (protective sweep of four rooms on
    one floor of residence "lasted two minutes"); United States v.
    Silva, 
    865 F.3d 238
    , 243 (5th Cir. 2017) (sweep of trailer home
    lasted less than a minute); United States v. Contreras, 
    820 F.3d 255
    , 269 (7th Cir. 2016) (protective sweep of house "lasted less
    than a minute"); United States v. Henderson, 
    748 F.3d 788
    , 793
    (7th Cir. 2014) (protective sweep of house lasted "no longer than
    five minutes"); United States v. Laudermilt, 
    677 F.3d 605
    , 608–09
    (4th Cir. 2012) (sweep of    two-story house "from start to finish,
    lasted about five minutes"); United States v. Hauk, 
    412 F.3d 1179
    ,
    1184 (10th Cir. 2005) (sweep of residence "lasted approximately
    five to ten minutes"); United States v. Flowers, 424 Fed. App'x
    302, 303 (5th Cir. 2011) (protective sweep of two-story house and
    garage "lasted no longer than five minutes"); see also Fishbein ex
    rel. Fishbein v. City of Glenwood Springs, Colo., 
    469 F.3d 957
    ,
    959 (10th Cir. 2006) (noting, in the context of rejecting a civil
    suit challenge to a protective sweep, that "estimates regarding
    how long the officers were in the home range from thirty seconds
    to slightly less than five minutes"); but see Gomez v. Feissner,
    474 Fed. App'x 53, 56 (3d Cir. 2012) (holding that officer was
    - 16 -
    entitled to qualified immunity from claim that protective sweep
    lasting five to fifteen minutes was unlawful).
    While we do not suggest that a purported sweep of a certain
    duration should necessarily be deemed invalid per se, the length
    of the sweep obviously is an important factor in assessing its
    lawfulness.   Courts have recognized that a short sweep is an
    indication that the search was truly cursory in nature. See, e.g.,
    United States v. Burrows, 
    48 F.3d 1011
    , 1017 (7th Cir. 1995) ("The
    record supports the determination that the search of the four
    bedrooms and linen closet, which required the officers to force
    four locked doors, took no more than five minutes, an interval
    compatible with the officers' legitimate purpose."); United States
    v. Hogan, 
    38 F.3d 1148
    , 1150 (10th Cir. 1994) ("[I]t appears from
    the officer's testimony that the protective sweep could have truly
    been cursory and ended . . . a few minutes after the arrest.");
    see also United States v. Lesane, 685 Fed. App'x 705, 722 (11th
    Cir. 2017) (noting that protective sweep of single-story house
    "took no longer than three or four minutes, lending support to the
    conclusion that the sweep was cursory in nature").
    2. Application of the Law to the Facts
    Reviewing the facts known to the agents, we readily conclude
    that a reasonable officer would have held a reasonable suspicion
    of danger supporting a protective sweep.      See United States v.
    Delgado-Pérez, 
    867 F.3d 244
    , 252 (1st Cir. 2017) (explaining that
    - 17 -
    we consider whether "the facts available at the moment of the
    .   .    . search [would support] a man of reasonable caution in the
    belief that the action taken was appropriate").
    At the time the officers arrested Hernandez-Mieses, they knew
    the following: they had arrived at the house at 5:45 AM and found
    multiple people up and about; when they approached the front door,
    they saw the shadows of several people through frosted glass; when
    they announced themselves, a person inside locked the door; when
    they entered, they saw three people, but observed four cellphones
    on the table; they observed a gun; finally, they saw a staircase
    close to the counter where the gun was found and an open door
    leading from the kitchen to the pool area and garage.             In short,
    there was a wealth of information supporting a reasonable suspicion
    that an armed person could be hidden on the first floor, or could
    have fled to the second floor or out the open door off the kitchen,
    between the time the agents announced themselves and the time they
    entered the house.       This case is therefore distinguishable from
    those in which we have determined a purported protective sweep was
    invalid because (a) there was a complete lack of objective facts
    supporting a reasonable suspicion that a dangerous person could be
    hiding     in   the   area   searched,   see,   e.g.,    United   States   v.
    Serrano-Acevedo,       
    892 F.3d 454
    ,    459-60    (1st   Cir.   2018);
    Delgado-Pérez, 867 F.3d at 253-54, or (b) the facts supported a
    - 18 -
    contrary belief that the area searched was in fact empty, see
    United States v. Paradis, 
    351 F.3d 21
    , 29 (1st Cir. 2003).
    However, as we have noted, reasonable suspicion is just part
    of the analysis.   On this record, we have concerns that the search
    of the second floor and the cargo van may not have been consistent
    with a protective sweep's limited duration and scope.       See Buie,
    
    494 U.S. at 327, 335-36
    .   For example, if the sweep took the major
    part of the twenty-two minutes from when the agents arrived at the
    house until they called the government attorney, the sweep would
    have been longer than those typically approved in comparable
    situations.   See supra Section II.C.1.   Indeed, the sweep of the
    first floor alone -- five to seven minutes -- matched or exceeded
    the length of some sweeps of entire residences.   See id.    Further,
    the problematic implication of the sweep's lengthy duration is
    compounded by the large number of agents on the scene.        Nazario
    testified that at least ten officers entered the house, and that,
    when he opened the cargo van, at least five officers were present.
    It stands to reason that the large number of agents conducting the
    sweep should have resulted in a search of shorter duration.
    The scope of the sweep also prompts concerns in the sense
    that the agents' actions in this case suggest that this may not
    have been the cursory sweep required by the Supreme Court.        The
    agents twice paused to inspect evidence in areas where no person
    could hide and that were not in plain view.       In particular, in
    - 19 -
    suppressing the drugs the agents found in one of the upstairs
    bedrooms, the district court concluded that the cocaine bricks
    were not in plain view, meaning that the agents had to have
    manipulated or otherwise searched the bag containing the cocaine
    bricks to observe them.    See United States v. Hernandez-Mieses,
    
    257 F. Supp. 3d 165
    , 180-81 (D.P.R. 2017).   This conduct suggests
    that the agents were searching for contraband rather than for
    dangerous persons.
    All that said, however, there are crucial gaps in the record
    relating to the protective sweep.      In particular, the district
    court did not make an explicit finding as to how long it took for
    the agents to enter the house and arrest Hernandez-Mieses before
    commencing the sweep.12   The longer it took for them to commence
    the sweep, the shorter the sweep and the more likely it was
    consistent with the durational component of Buie.     The district
    court also did not make explicit findings about how many agents
    conducted the sweep -- that is, we know ten agents were in the
    house and that five agents were present when Nazario opened the
    12 Hernandez-Mieses does not argue that there was an undue
    delay between when the agents entered his home and the commencement
    of the sweep. See, e.g., United States v. Dabrezil, 603 Fed. App'x
    756, 760 (11th Cir. 2015) (considering whether it was objectively
    reasonable for an officer arriving on the scene to commence a sweep
    seven to twenty-five minutes after other officers had entered the
    apartment).
    - 20 -
    cargo van, but it is unclear how many agents swept the two floors
    of the house.
    In light of these important factual gaps in the record on the
    protective sweep issue, we conclude that a remand is appropriate.
    Ordinarily, we would not remand so that a party that failed to
    carry its burden (here, the government) would get a second chance
    to do so.    But the circumstances here are unusual.     Although
    Hernandez-Mieses clearly challenged the legality of the sweep
    before the district court, he focused on his contention that the
    agents lacked reasonable suspicion that a dangerous person or
    persons were hiding on the scene.   By not focusing on the sweep's
    duration and scope, important elements of the protective sweep
    analysis, Hernandez-Mieses bears some responsibility for the lack
    of focus by the government and the district court on these aspects
    of the sweep.    Therefore, we think it appropriate, in these
    circumstances, to vacate the district court's determination that
    the sweep was lawful and remand for the court to develop the
    factual record as to the sweep's duration and scope, with a
    particular focus on how much of the twenty-two-minute window
    between when the agents arrived at the house and when they called
    the government attorney was taken up by the sweep.   Based on its
    further factual findings, the district court should then determine
    whether the government has met its burden of demonstrating the
    - 21 -
    sweep's legality.13         If the government can demonstrate that the
    sweep was consistent with Buie, the agents clearly were entitled
    to look in the back of the cargo van, given the district court's
    unchallenged finding that the vehicle was "big enough to harbor
    several individuals."         Hernandez-Mieses, 257 F. Supp. 3d at 183;
    see Buie, 
    494 U.S. at 327
     (defining a protective sweep as "a
    cursory visual inspection of those places in which a person might
    be hiding" (emphasis added)).
    D.   Seizure of Drugs from Cargo Van (Automobile Exception)
    As an alternative basis for seizing the drugs from the cargo
    van, apart from the protective sweep, the government argues, and
    the district court determined, that the drugs were also lawfully
    seized     pursuant    to   the   automobile   exception   to   the   warrant
    requirement.14        The automobile exception permits a warrantless
    search of a vehicle if there is probable cause to believe that
    evidence of a crime or contraband will be found in the vehicle.
    See United States v. Kennedy, 
    881 F.3d 14
    , 18 (1st Cir. 2018).
    The district court treated the automobile exception issue as
    13To be clear, we are not retaining jurisdiction of this
    case.   Rather, upon remand, the district court should make its
    findings and draw its legal conclusions, and the parties can then
    decide if a new appeal is warranted.
    14The district court further determined that the search of
    the cargo van was warranted by "exigent circumstances" arising
    from   the   "hot  pursuit"   of   the   two fleeing   men.   See
    Hernandez-Mieses, 257 F. Supp. 3d at 186. The government does not
    pursue this theory on appeal.
    - 22 -
    entirely distinct from the protective sweep.                 After the district
    court issued its suppression order, however, the Supreme Court
    issued a decision that reveals the flaw in that approach.
    In Collins v. Virginia, the Court rejected a warrantless
    search of a motorcycle parked in a partially enclosed section of
    the defendant's driveway that the officer justified on the basis
    of the automobile exception.          
    138 S. Ct. 1663
    , 1671 (2018).             The
    Court held that the automobile exception by itself "does not afford
    the necessary lawful right of access to search a vehicle parked
    within a home or its curtilage because it does not justify an
    intrusion on a person's separate and substantial Fourth Amendment
    interest in his home and curtilage."             
    Id. at 1672
    .    In other words,
    if   an    officer   wants    to   search   a    vehicle    located   within    the
    curtilage of a home based on the automobile exception, the officer
    must first have a lawful basis for accessing the vehicle.                  See 
    id.
    ("Just as an officer must have a lawful right of access to any
    contraband he discovers in plain view in order to seize it without
    a warrant[,] . . . so, too, an officer must have a lawful right of
    access     to   a   vehicle   in   order    to   search    it   pursuant   to   the
    automobile exception.").
    The district court did not specifically consider whether the
    cargo van was within the curtilage, but there is no doubt that it
    was.      It was parked in the attached garage, and attached garages
    are typically part of a home's curtilage.                  See United States v.
    - 23 -
    Dunn, 
    480 U.S. 294
    , 307-08 (1987) ("[T]he general rule is that
    the [c]urtilage includes all outbuildings used in connection with
    a residence, such as garages . . . connected with and in close
    vicinity    of   the   residence."      (second    alteration       in   original)
    (internal    quotation      marks    omitted)).      Thus,    to    rely   on   the
    automobile exception to search the cargo van, the agents needed a
    lawful basis for entering the garage.
    As described above, the agents' putative reason for entering
    the garage was to conduct the protective sweep.                    Therefore, the
    agents'    recourse    to   the     automobile    exception   depends      on   the
    legality of the sweep.        We therefore vacate the district court's
    judgment as to the application of the automobile exception to the
    cargo van.       On remand, the district court should reassess the
    automobile exception issue in relation to the cargo van depending
    on the court's determination regarding the protective sweep.15                   We
    note, however, that it would be unnecessary for the government to
    pursue this alternative theory on remand.             If the district court
    determines that the protective sweep was lawful, as described
    above, the agents had a basis for entering the garage and for
    15The government has not argued that the search of the cargo
    van pursuant to the automobile exception was permissible because
    the agents were acting in good-faith reliance on pre-Collins
    precedent.   We make no judgment on the viability of any such
    argument.
    - 24 -
    opening the cargo van.          If the district court determines that the
    protective sweep was not lawful, the agents did not have any basis
    for    entering     the    garage,     and     the    automobile    exception    is
    unavailable.
    E. Seizure of Evidence from Minivan (Automobile Exception)
    The district court also denied suppression of the items seized
    from the minivan parked in the driveway based on the automobile
    exception to the warrant requirement.                Again, in light of Collins,
    we    face   the   question     of   whether    the    minivan   was   within   the
    curtilage, and if so, whether the agents had lawful access to the
    vehicle.
    It is well established that where there is some doubt about
    whether an area is part of the home's curtilage, a court must
    consider
    [1] the proximity of the area claimed to be curtilage to
    the home, [2] whether the area is included within an
    enclosure surrounding the home, [3] the nature of the
    uses to which the area is put, and [4] the steps taken
    by the resident to protect the area from observation by
    people passing by.
    Dunn, 
    480 U.S. at 301
    ; see United States v. Owens, 
    917 F.3d 26
    ,
    34-35 (1st Cir. 2019), petition for certiorari pending, No. 19-21
    (filed July 3, 2019) (noting that the Dunn factors should be
    applied to determine whether a particular driveway is part of the
    curtilage).        The Court did not make any findings regarding the
    Dunn    factors,     and   we    are   loath     to    make   the   fact-specific
    - 25 -
    determination     in     the   first      instance.     Although     there     are
    photographs of the driveway in the record that establish its
    proximity to the home and the fact that it was not enclosed, the
    record is not developed as to Dunn factors 3 (nature of the uses)
    and 4 (steps taken by the resident to protect the area from
    observation).     The fact that the minivan "was parked in an open
    space and could be seen from the street," Hernandez-Mieses, 257 F.
    Supp. 3d at 174, is not dispositive, see Collins, 
    138 S. Ct. at 1675
     ("So long as it is curtilage, a parking patio . . . into which
    an   officer   can     see   from   the   street   is   no   less   entitled    to
    protection from trespass and a warrantless search than a fully
    enclosed garage.").
    We therefore vacate and remand as to the search of the minivan
    so that the district court can determine whether the vehicle was
    within the curtilage.           If it was, the district court should
    determine whether the agents had any lawful basis -- other than a
    protective sweep -- for accessing the vehicle.16              See Collins, 
    138 S. Ct. at 1672
    .      If the district court determines that the minivan
    was not within the curtilage, the court should determine whether
    the agents had probable cause to search the vehicle pursuant to
    16Nazario testified that the purported protective sweep
    concluded with the search of the garage, and the government did
    not argue that the minivan was accessed or searched pursuant to a
    protective sweep.
    - 26 -
    the   automobile   exception   without   relying   on   any    unlawfully
    obtained information.
    III.
    For the foregoing reasons, we affirm in part and vacate
    and remand in part the district court's suppression order.            The
    district court correctly determined that the gun, cellphones, and
    cash found on the first floor were lawfully seized.           However, we
    vacate and remand as to the cellphones on the second floor and the
    drugs in the cargo van so that the district court can make further
    findings as to the duration and scope of the purported protective
    sweep.   We also vacate and remand as to the application of the
    automobile exception to the cargo van so that the district court
    can reconsider the issue based on its conclusions regarding the
    sweep.   Finally, we vacate and remand as to the items seized from
    the minivan so that the district court can determine whether that
    vehicle was within the curtilage.
    So ordered.
    - 27 -