United States v. Mercado-Gracia ( 2021 )


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  •                                                                                  FILED
    United States Court of Appeals
    Tenth Circuit
    PUBLISH                                March 2, 2021
    Christopher M. Wolpert
    UNITED STATES COURT OF APPEALS                        Clerk of Court
    FOR THE TENTH CIRCUIT
    _________________________________
    UNITED STATES OF AMERICA,
    Plaintiff - Appellee,
    v.                                                          No. 19-2153
    AARON MARTIN MERCADO-GRACIA,
    Defendant - Appellant.
    _________________________________
    Appeal from the United States District Court
    for the District of New Mexico
    (D.C. No. 1:16-CR-01701-JCH-1)
    _________________________________
    Irma Rivas, Assistant Federal Public Defender, Albuquerque, New Mexico, for Appellant
    Mercado-Gracia.
    Tiffany L. Walters, Assistant United States Attorney (John C. Anderson, United States
    Attorney, with her on the brief), Albuquerque, New Mexico, for Appellee United States
    of America.
    _________________________________
    Before TYMKOVICH, Chief Judge, EBEL, and BACHARACH, Circuit Judges.
    _________________________________
    EBEL, Circuit Judge.
    _________________________________
    In this direct criminal appeal, Defendant Aaron Mercado-Gracia challenges his
    three convictions for drug trafficking, conspiring to traffic drugs, and using a firearm
    in relation to a drug-trafficking offense. In upholding his convictions, we conclude:
    1) The district court did not err in denying Mercado-Gracia’s motion to suppress
    evidence discovered as the result of a traffic stop. The traffic stop evolved into a
    consensual encounter during which the police officer developed reasonable suspicion
    to believe Mercado-Gracia was involved in drug trafficking. That reasonable
    suspicion justified a brief investigative detention, during which the officer deployed
    his drug-sniffing dog, which alerted, leading to the discovery of a gun and two
    kilograms of heroin in the car Mercado-Gracia was driving. 2) The district court did
    not abuse its discretion in denying Mercado-Gracia’s request to play during voir dire
    a video to educate prospective jurors on implicit bias. Having jurisdiction under 
    28 U.S.C. § 1291
    , we, therefore, AFFIRM Mercado-Gracia’s convictions.
    I. BACKGROUND
    Just before noon on March 25, 2016, New Mexico State Police Officer Ronald
    Wood, with his drug-sniffing dog Arras, was patrolling Interstate 40 just west of
    Albuquerque. The officer clocked Mercado-Gracia driving a Dodge Charger ninety-
    two miles an hour in a seventy-five-mile-an-hour zone, heading east toward
    Albuquerque. Officer Wood pulled Mercado-Gracia over.
    Mercado-Gracia provided the officer with his driver’s license, car registration
    and proof of insurance. At the officer’s direction, Mercado-Gracia exited his vehicle
    and stood beside the patrol car while Officer Wood used his in-car computer to check
    these documents Mercado-Gracia provided. Mercado-Gracia’s driver’s license
    indicated that he was from Phoenix, Arizona. The car was also registered in Arizona
    2
    but to a Hector Ramirez Reyes. A third individual, Favian Reyes, had insured the
    car.1 Although Mercado-Gracia first stated that his cousin Favian owned the car,
    Mercado-Gracia did not know Favian’s last name. Mercado-Gracia then explained to
    the officer that Favian was actually “my lady’s, uh, husband’s cousin.”2 (I R. 338
    (internal quotation marks omitted).) According to Mercado-Gracia, Favian had let
    him borrow the car to drive to Albuquerque.
    While writing a speeding ticket, Officer Wood inquired about
    Mercado-Gracia’s travel plans, asking what brought him to Albuquerque:
    Defendant: Just I own my own business —
    Officer Wood: Do you?
    Defendant: Yeah. It is a remodeling company. I’m trying to just like get
    going at it.
    Officer Wood: So you’re coming to Albuquerque for work?
    Defendant: Oh no, just so I can drive around.
    Officer Wood: Drive around?
    Defendant: Yeah. I have a lady over here I want to meet.
    Officer Wood: Oh, okay. Well, I thought your lady was over there [back
    in Arizona]. This was her cousin’s car.
    Defendant: Yeah, I know.
    1
    The district court referred to this individual as Favian Reyes, while the parties refer
    to him instead as Fabian Reyes.
    2
    Mercado-Gracia notes that both the defense and the Government transcribed this
    statement, instead, as his “lady’s cousin.” (Aplt. Br. 6 n.2.) But Officer Wood
    testified that Mercado-Gracia stated that he was driving “his lady’s husband’s
    cousin’s car.” (I SROA 52.)
    3
    Officer Wood: Oh, okay.
    Defendant: (Inaudible) girl down here.
    Officer Wood: I see.
    Defendant: So I couldn’t bring my car.
    Officer Wood: Ah, I see. How long are you going to be over here?
    Defendant: Where?
    Officer Wood: Albuquerque.
    Defendant: Who, me?
    Officer Wood: Yeah.
    Defendant: How long have I been here?
    Officer Wood: No. How long are you going to be over here?
    Defendant: Oh, I don’t know. It depends. Probably just the weekend.
    Officer Wood: Ah.
    Defendant: Yeah. I have to go back to work Monday. I would like to
    make it back by Easter.
    (Id. at 339.) The traffic stop occurred on the Friday afternoon before Easter Sunday.
    It is a seven-hour drive from Phoenix to Albuquerque. During this conversation,
    Officer Wood noticed that Mercado-Gracia “became increasingly fidgety, antsy,
    moving his hands and feet around,” and “was answering [the officer’s] questions,
    which should have had easy answers, with a question, and based on [the officer’s]
    training, [this] was an attempt for the brain to buy time to fabricate a response.” (Id.
    at 340.)
    4
    Officer Wood checked the vehicle identification number (VIN) on the Dodge
    Charger, completed writing the traffic ticket, and explained to Mercado-Gracia “the
    process to resolve the speeding citation.” (Id.) The officer also checked to see if the
    VIN matched the documents Mercado-Gracia had provided the officer—it did—and
    then determined through NCIC that the vehicle had not been reported stolen.
    Seven minutes after initiating the stop, Officer Wood handed back to
    Mercado-Gracia his driver’s license, the car’s registration and proof of insurance,
    gave him the speeding ticket, and told Mercado-Gracia, “Okay. You’re free to go.”
    (Id.) As Mercado-Gracia walked back to his vehicle, however, Officer Wood
    invoked “the old highway patrol ‘two-step,’” United States v. White, 
    584 F.3d 935
    ,
    943 (10th Cir. 2009):
    Officer: Excuse me, Aaron.
    Defendant: Yeah?
    Officer: Is it okay if I ask you some questions?
    Defendant: What?
    (I R. 3441.) Mercado-Gracia walked back to the officer, who was standing near the
    passenger door of his patrol car.
    Officer: Is it okay if I ask you some questions?
    Defendant: Regarding?
    Officer: Huh? Well, I’m just a little confused, is all, on your travel here,
    your trip. It’s a little confusing to me, you know what I mean?
    5
    (Id. at 341.) The district court found that the officer’s “tone of voice was cordial and
    friendly.” (Id.)
    The officer then questioned Mercado-Gracia for three more minutes:
    Officer Wood . . . asked [Mercado-Gracia] questions about whether he
    personally owns a car and why he did not bring it, and [Mercado-Gracia]
    replied that he has a car but that’s the only car “we have at home.” Officer
    Wood was confused because his answer indicated his lady had the car
    back in Phoenix, but [Mercado-Gracia] just said he was coming to
    Albuquerque to meet a lady. Officer Wood inquired whether he has a
    wife or girlfriend. [Mercado-Gracia] replied it was his partner, they had
    only one car, and he was here to see a girl. Officer Wood asked where in
    Albuquerque he was going, to which [Mercado-Gracia] responded that he
    did not know and that he had to call and meet her. Officer Wood asked
    for the woman’s name, and after asking why he needed to know,
    [Mercado-Gracia] gave a first name. Officer Wood asked where he was
    going to stay, to which [Mercado-Gracia] revealed that he was going to
    rent a place and pay cash, because he did not bring his credit cards.
    Officer Wood inquired if the owner of the car knew [Mercado-Gracia]
    had his car and knew he was driving to Albuquerque with it, and he
    replied yes to both questions.
    (Id. (record citations omitted).) The district court found that, during this exchange,
    Mercado-Gracia “had also become increasingly nervous, such that now when
    answering Officer Wood’s questions, he would look down or away without making
    eye contact.” (Id. at 342.) “Officer Wood had also noticed that [Mercado-Gracia’s]
    keyring had only one key.” (Id.)
    Officer Wood asked if [Mercado-Gracia] had any weapons in the
    car, to which [Mercado-Gracia] said, “No.” . . .
    Officer Wood then asked if there were any drugs in the vehicle, to
    which [Mercado-Gracia] said, “No.” When asked if he had any
    marijuana, [Mercado-Gracia] replied, “Not that I am aware of.” When
    Officer Wood inquired about other drugs, [Mercado-Gracia] responded
    no. . . .
    6
    Officer Wood asked for permission to search the vehicle.
    [Mercado-Gracia] replied, “No,” and when asked why, [he] explained
    that he “thought it was just my ticket.” Officer Wood attempted to clarify
    by asking if he did not want the vehicle or his own property searched, but
    [Mercado-Gracia] said, “The whole thing” and “I know I have the right.”
    At 12:08 p.m., Officer Wood responded, “No, definitely you do. So I’ll
    be straight up with you. Right now I have some concerns, okay? And so
    what I am going to have to do is I’m going to deploy my canine on the
    vehicle, okay? He then explained that he was going to deploy his dog on
    the exterior of the vehicle because of concerns he had that
    [Mercado-Gracia’s] travel plans did not make sense, but [the officer] did
    not further elaborate on his reasons when [Mercado-Gracia] asked about
    them. [Mercado-Gracia] looked into the patrol unit and his eyes widened,
    seemingly scared, that the dog was there to search.
    (Id. at 342–43 (record citations omitted).)
    Officer Wood called for assistance and patted down Mercado-Gracia for
    weapons. Finding none, the officer asked Mercado-Gracia to stand away from his
    vehicle. Officer Wood then deployed his drug-sniffing dog Arras for two minutes
    around the outside of the Dodge Charger, during which time Arras alerted. Officer
    Wood then handcuffed Mercado-Gracia and explained that Mercado-Gracia now had
    to accompany the officer while he applied for a search warrant for the car. A second
    officer arrived at this point. Mercado-Gracia then consented to the officers searching
    his vehicle.3
    During that search, the officers found over two kilograms of heroin and a
    firearm. Based on this evidence, the United States charged Mercado-Gracia with
    1) possessing one kilogram or more of heroin with the intent to distribute it, in
    3
    Although he initially denied Officer Wood consent to search the car, on appeal
    Mercado-Gracia does not challenge the fact that, at this point in the encounter, he did
    consent to the officers searching the car.
    7
    violation of 
    21 U.S.C. § 841
    (a)(1) and 841(b)(1)(A); 2) conspiring to possess, with
    the intent to distribute, more than one kilogram of heroin, see 
    id.
     § 846; and 3) using
    or carrying a firearm during and in relation to a drug-trafficking crime, in violation of
    
    18 U.S.C. § 924
    (c). After the district court denied Mercado-Gracia’s suppression
    motion, the case proceeded to trial. Defense counsel asked to show a video during
    voir dire to educate prospective jurors about implicit racial bias. The district court
    declined that request. The jury convicted Mercado-Gracia of all three charges, and
    the district court sentenced him to 180 months in prison. That sentence represented a
    mandatory minimum ten years in prison on each of the distribution and conspiracy
    convictions, see 
    21 U.S.C. §§ 841
    (b)(1)(A)(i), 846, to run concurrently, and a
    mandatory minimum five-year sentence on the weapons charge, to run consecutively
    to the two ten-year drug-trafficking sentences, see 
    18 U.S.C. § 924
    (c)(1)(A)(i).
    II. LEGAL DISCUSSION
    On appeal, Mercado-Gracia challenges the district court’s decision to deny his
    motion to suppress and the court’s refusal to show the video on implicit bias during
    voir dire.
    A. The district court did not err in denying Mercado-Gracia’s motion to
    suppress
    The Fourth Amendment protects persons against “unreasonable searches and
    seizures.” U.S. Const. amend. IV.4 This court reviews de novo “the ultimate question
    4
    “The Fourth Amendment is enforceable against the States through the Due Process
    Clause of the Fourteenth Amendment.” United States v. Hammond, 
    890 F.3d 901
    , 904
    n.1 (10th Cir. 2018) (citing Mapp v. Ohio, 
    367 U.S. 643
    , 655 (1961)).
    8
    of reasonableness under the Fourth Amendment,” and reviews the factual findings
    that inform the reasonableness determination for clear error. United States v. Cruz,
    
    977 F.3d 998
    , 1003-04 (10th Cir. 2020). When this court reviews the “denial of a
    defendant’s motion to suppress, we view the evidence in the light most favorable to
    the government.” 
    Id. at 1003
    .
    1. The traffic stop began as a Fourth Amendment seizure but evolved into
    a consensual citizen-police encounter that did not implicate the Fourth
    Amendment
    This Court has recognized three types of police-citizen encounters:
    (1) “consensual encounters which do not implicate the Fourth Amendment”;
    (2) “investigative detentions which are Fourth Amendment seizures of
    limited scope and duration and must be supported by a reasonable suspicion
    of criminal activity”; and (3) “arrests, the most intrusive of Fourth
    Amendment seizures and reasonable only if supported by probable cause.”
    United States v. Hammond, 
    890 F.3d 901
    , 904 (10th Cir. 2018) (quoting United States v.
    Davis, 
    94 F.3d 1465
    , 1467-68 (10th Cir. 1996)). The traffic stop at issue here was a
    seizure for Fourth Amendment purposes. See United States v. Bradford, 
    423 F.3d 1149
    , 1156 (10th Cir. 2005); see also Rodriguez v. United States, 575 U.S 348, 354
    (2015). Mercado-Gracia does not challenge the validity of that initial stop. Instead,
    he contends that Officer Wood unreasonably prolonged the traffic stop. “[O]nce a
    traffic stop is completed, the driver must be allowed to leave unless ‘(1) the officer has an
    objectively reasonable and articulable suspicion that illegal activity has occurred or is
    occurring, or (2) the initial detention has become a consensual encounter.’” United States
    v. Gomez-Arzate, 
    981 F.3d 832
    , 842 (10th Cir. 2020) (quoting Bradford, 
    423 F.3d at
                                       9
    1156–57); see also Rodriguez, 575 U.S. at 354 (“Authority for the seizure thus ends when
    tasks tied to the traffic infraction are—or reasonably should have been—completed.”).
    The district court determined that, after Officer Wood issued Mercado-Gracia
    a speeding ticket and returned his documents, the encounter between the two became
    consensual. Applying an objective reasonable person standard to the facts presented,
    see United States v. Gaines, 
    918 F.3d 793
    , 796 (10th Cir. 2019) (citing Florida v.
    Bostick, 
    501 U.S. 429
    , 436 (1991)), we review that determination de novo, see
    United States v. Rogers, 
    556 F.3d 1130
    , 1137 (10th Cir. 2009).
    “A consensual encounter is the voluntary cooperation of a private citizen in
    response to non-coercive questioning by a law enforcement officer.” Bradford, 
    423 F.3d at 1158
     (quoting United States v. West, 
    219 F.3d 1171
    , 1176 (10th Cir. 2000)).
    “Whether an encounter can be deemed consensual depends on whether the police conduct
    would have conveyed to a reasonable person that he or she was not free to decline the
    officer’s requests or otherwise terminate the encounter.” 
    Id.
     (quoting West, 
    219 F.3d at 1176
    ). In deciding whether an encounter between a police officer and a citizen is
    consensual or is instead a Fourth Amendment seizure, then, a court must determine
    “whether ‘a reasonable person under the circumstances would believe [he] was free to
    leave or disregard the officer’s request for information.’” Gomez-Arzate, 981 F.3d at 842
    (quoting Bradford, 
    423 F.3d at 1158
    ); see also Bostick, 
    501 U.S. at 437
    .
    “We follow a bright-line rule that requires the driver’s documents to be returned
    before the stop may be considered a consensual encounter.” Gomez-Arzate, 981 F.3d at
    842. “The return of a driver’s documentation is not, however, always sufficient to
    10
    demonstrate that an encounter has become consensual.” Bradford, 
    423 F.3d at 1158
    . In
    considering whether an encounter is consensual, we consider several non-exclusive
    factors applied to an objective reasonable person being stopped, including
    the location of the encounter, particularly whether the defendant is in an open
    public place where he is within the view of persons other than law
    enforcement officers; whether the officers touch or physically restrain the
    defendant; whether the officers are uniformed or in plain clothes; whether
    their weapons are displayed; the number, demeanor and tone of voice of the
    officers; whether and for how long the officers retain the defendant's personal
    effects such as tickets or identification; and whether or not they have
    specifically advised defendant at any time that he had the right to terminate
    the encounter or refuse consent.
    Gomez-Arzate, 981 F.3d at 842 (quoting United States v. Spence, 
    397 F.3d 1280
    , 1283
    (10th Cir. 2005)). “[N]o one factor is dispositive.” 
    Id.
     We focus “on ‘the coercive effect
    of police conduct, taken as a whole on a reasonable person.’” 
    Id.
     (quoting Spence, 
    397 F.3d at 1283
    ).
    Here, seven minutes after he initiated the traffic stop, Officer Wood gave
    Mercado-Gracia a speeding ticket, returned his driver’s license, the vehicle’s
    registration and proof of insurance, and told Mercado-Gracia, “Okay. You’re free to
    go.” (I R. 340 (internal quotation marks omitted).) Although an officer is not
    required to inform a citizen he is free to go before the encounter becomes consensual,
    see United States v. Patten, 
    183 F.3d 1190
    , 1194 (10th Cir. 1999), here Officer Wood
    clearly did so. Mercado-Gracia understood because he began walking back to his car
    before the officer called him by name and asked if he could ask Mercado-Gracia a
    few questions. See Gomez-Arzate, 981 F.3d at 842-43 (rejecting argument that
    11
    calling motorist back to the patrol car after telling him he could go amounted to a
    coercive show of authority). The district court found that
    Officer Wood did not use an overbearing show of authority, he spoke in
    a friendly manner, and he let [Mercado-Gracia] walk back towards his
    own car. He was the only officer present on the side of a public interstate,
    did not display a weapon, did not touch or restrain Defendant and did not
    stand in his way.
    (I R. 349.) The district court further found that Mercado-Gracia voluntarily
    consented to answer the officer’s questions, noting that Mercado-Gracia “responded
    to Officer Wood’s request with ‘regarding,’ walked back toward Officer Wood, and
    proceeded to answer Officer Wood’s questions,” and “did not act or express intent to
    affirmatively end the consensual encounter at any time before Officer Wood told him
    he would deploy his dog around the car.” (Id. at 349–50.)
    Considering the totality of these circumstances, we agree with the district court
    that an objectively reasonable person in Mercado-Gracia’s position would have felt
    free to decline to answer Officer Wood’s additional questions and go on his way.
    See United States v. Hunter, 
    663 F.3d 1136
    , 1140, 1144–45 (10th Cir. 2011) (holding
    traffic stop became consensual encounter after officer gave driver back his
    documentation and told him to have a nice day, before asking the driver if he could
    ask him some additional questions, and driver responded “yes”); United States v.
    Hernandez, 
    93 F.3d 1493
    , 1498–1500 (10th Cir. 1996) (holding defendant consented
    to further questioning while sitting in patrol car, after officer handed him back his
    license and registration and told him he could leave); see also West, 
    219 F.3d at
    1174–77 (defendant consented to officer’s questions after officer handed back the
    12
    driver’s license, rental agreement for the car, and a warning before continuing to ask
    driver questions).
    Citing United States v. Mendenhall, 
    446 U.S. 544
    , 558 (1980),
    Mercado-Gracia argues that “it seems unlikely that after a seizure anyone—
    particularly a person of color—would actually feel free to leave when recalled by a
    police officer.” (Aplt. Br. 23.) This court has rejected interjecting race into the
    objective reasonable person test—at issue here—for determining whether a
    citizen-police encounter was consensual or instead a Fourth Amendment seizure. See
    United States v. Easley, 
    911 F.3d 1074
    , 1081 (10th Cir. 2018), cert. denied, 
    139 S. Ct. 1644
     (2019). “Mendenhall’s discussion of race . . . was in the context of assessing
    voluntariness, not seizure. While the test for voluntariness of consent accounts for
    some subjective characteristics of the accused, the Fourth Amendment’s seizure
    analysis has always been an objective one.” Easley, 911 F.3d at 1081 (citing
    Schneckloth v. Bustamonte, 
    412 U.S. 218
    , 226 (1973)) (further citation omitted).
    “Indeed, the Tenth Circuit has specifically disclaimed considerations that could inject the
    objective reasonable person analysis with subjective considerations: ‘[W]e reject any rule
    that would classify groups of travelers according to gender, race, religion, national origin,
    or other comparable status.’” 
    Id.
     (quoting United States v. Little, 
    18 F.3d 1499
    , 1505
    (10th Cir.1994) (en banc)).
    Importantly, in this appeal, there is no issue presented challenging the
    voluntariness of Mercado-Gracia’s consent to the search of the car, after the drug dog
    alerted. Nor does the Government rely on consent to justify deploying the drug dog
    13
    in the first place. Instead, as explained in the next section of this opinion, by the time
    he deployed the drug dog, Officer Wood had acquired reasonable suspicion that
    Mercado-Gracia was engaged in criminal activity sufficient to justify a further brief
    detention while the dog sniffed the exterior of the car.
    As for Mercado-Gracia’s argument that no objectively reasonable person in his
    position would have felt free to disregard Officer Wood’s additional questions and
    leave, the cases cited above, as well as innumerable other cases, have long concluded
    that, under the right circumstances similar to those presented here a traffic stop can
    become a consensual citizen-police encounter that does not implicate the Fourth
    Amendment. Mercado-Gracia’s argument to the contrary is unavailing. We
    conclude that, under the totality of the circumstances presented here, an objective
    reasonable person would have felt free to decline to answer Officer Wood’s
    questions, posed after the officer gave Mercado-Gracia back his identification and
    documents and told him he was free to go.5
    2. The district court did not err in determining that, during the consensual
    encounter, Officer Wood acquired reasonable suspicion to detain
    Mercado-Gracia briefly in order to deploy the drug-sniffing dog
    By the time Mercado-Gracia declined Officer Wood’s initial request to search
    the car, the consensual encounter between the two had ended and the officer,
    5
    In light of our conclusion that the traffic stop evolved into a consensual
    citizen-police encounter, we need not address the Government’s alternative assertion
    that, at the time the officer returned Mercado-Gracia’s documents, the officer already
    had reasonable suspicion to believe that Mercado-Gracia was involved in criminal
    activity to justify extending the stop.
    14
    therefore, needed reasonable suspicion to detain Mercado-Gracia further while the
    officer deployed his drug-sniffing dog.6 See United States v. Berg, 
    956 F.3d 1213
    ,
    1216-18 (10th Cir. 2020), cert. denied, 
    141 S. Ct. 605
     (2020). The district court
    concluded that the officer, by that time, had developed reasonable suspicion that
    Mercado-Gracia was engaged in criminal activity—transporting illegal drugs—
    sufficient to justify a brief detention to deploy the dog, based on the following:
    Mercado-Gracia’s answers to the officer’s questions were “inconsistent”—he
    provided confusing explanations for his trip to Albuquerque, he did not know the last
    name of the car’s owner, and changed his answer as to who the owner was, first a
    cousin and then his lady’s husband’s cousin; he was traveling from Phoenix, a known
    drug “source city”; and he had become increasingly nervous during his interaction
    with the officer. Reviewing de novo the district court’s determination that these facts
    supported reasonable suspicion sufficient to justify a brief detention, see Ornelas v.
    United States, 
    517 U.S. 690
    , 694-99 (1996), we again agree.
    The fact that Mercado-Gracia was from Phoenix, which authorities consider a
    “source” city, is not entitled to much weight. See United States v. Williams, 
    271 F.3d 1262
    , 1270 (10th Cir. 2001) (“Standing alone, a vehicle that hails from a
    purported known drug source area is, at best, a weak factor in finding suspicion of
    criminal activity.”). Neither is nervousness, standing alone. See Bradford, 
    423 F.3d 6
    A dog sniff occurring outside a car is not a search, see Felders ex rel. Smedley v.
    Malcom, 
    755 F.3d 870
    , 880 (10th Cir. 2014) (citing Illinois v. Ceballes, 
    543 U.S. 405
    , 409 (2005)), but it may involve an additional brief detention.
    15
    at 1157 (warning courts not to “overcount[]” nervousness). But here those facts add
    to the calculus of reasonable suspicion. So did Mercado-Gracia’s response to the
    question whether he had any marijuana in the car—“[n]ot that I am aware of.” (I R.
    342.) Most compelling, Mercado-Gracia’s description of his travel plans as
    reasonably understood by Officer Wood kept changing, as did his explanation of
    whose car he was driving. Further, he did not know the full name of the person who
    lent him the car. Officer Wood testified that these circumstances are consistent with
    a drug courier’s general modus operandi: often, a drug courier will drive another
    person’s car to a distant city, not knowing where in that city he is to go until he gets
    there and calls someone to make the delivery, then he will turn around and
    immediately return home. While Mercado-Gracia’s suspicious travel plans could be
    explained instead by his traveling to Albuquerque to have an affair, the officer need
    not “rule out the possibility of innocent conduct” before acquiring reasonable
    suspicion of criminal activity sufficient to justify a brief investigative detention.
    United States v. Cortez, 
    965 F.3d 827
    , 834 (10th Cir. 2020), cert. denied, 
    2021 WL 161110
     (U.S. Jan. 19, 2021). Further, “in assessing reasonable suspicion we defer to a
    police officer’s training and ability to discern innocent conduct from suspicious
    behavior.” 
    Id.
     Considering the totality of these circumstances, the district court did not
    err in concluding that the officer had acquired reasonable suspicion of criminal
    activity to detain Mercado-Gracia briefly while the officer deployed his drug-sniffing
    dog. We conclude, then, that the district court did not err in denying
    16
    Mercado-Gracia’s motion to suppress the drugs and gun found in the car he was
    driving.
    B The district court did not abuse its discretion in refusing to play a video
    during voir dire to educate prospective jurors on implicit bias
    “[F]ederal judges have . . . ample discretion in determining how best to conduct
    the voir dire.” Rosales-Lopez v. United States, 
    451 U.S. 182
    , 189 (1981) (addressing
    whether trial court should have asked voir dire question regarding bias based on race
    or Mexican descent). Mercado-Gracia argues that the district court abused its ample
    discretion in denying his request to show an eleven-minute video produced by the
    federal district court for the Western District of Washington to educate prospective
    jurors on implicit bias. We cannot agree.
    By implicit bias, Mercado-Gracia means “unconscious assumptions that
    humans make about individuals.” (Aplt. Br. 33-34 (quoting United States v.
    Mateo-Medina, 
    845 F.3d 546
    , 553 (3d Cir. 2017)).) Mercado-Gracia, who was born
    in Mexico, contends that “[t]here was a reasonable possibility that implicit bias
    against Mexican immigrants or nationals would influence a juror because of the
    political climate and nature of the charge[s]” filed against him. (Id. at 37.) More
    specifically, Mercado-Gracia cites historical “anti-Mexican sentiment” in the United
    States and contemporary political rhetoric that suggests “Mexico sends drug dealers
    to America.” (I R. 655.) On that basis, Mercado-Gracia sought to use the video “to
    educate potential jurors about [such] implicit bias.” (Id. at 653.) The video informs
    jurors that everyone has unconscious biases, urges jurors to be aware of their own
    17
    unconscious biases, and encourages jurors, during the trial, to ask themselves if they
    would reach the same decisions if the defendant, witness, or lawyer was of another
    age, gender, or race. See “Unconscious Bias,”
    http://www.wawd.uscourts.gov/jury/unconscious-bias (last visited Feb. 3, 2021). The
    video, then, is not designed to identify for removal any specific jurors who hold
    biases against the defendant but aims instead to make all jurors aware of the
    possibility of their own subconscious biases.
    In support of playing this video for the jury venire, Mercado-Gracia cited
    studies “demonstrat[ing] that implicit bias can be overcome by training, awareness,
    and active deliberation.” (I R. 654 (citing Hon. Mark Bennett, Unraveling the
    Gordian Knot of Implicit Bias in Jury Selection: The Problems of Judge-Dominated
    Voir Dire, the Failed Promise of Batson, and Proposed Solutions, 4 Harv. L. & Pol’y
    Rev. 149, 156-57 (Winter 2010)).) The Government opposed playing the video,
    citing legal scholars and other studies suggesting that raising racial bias during voir
    dire actually risks injecting bias into jury deliberations. See Pena-Rodriguez v.
    Colorado, 
    137 S. Ct. 855
    , 869 (2017) (noting “the dilemma faced by trial court judges
    and counsel in deciding whether to explore potential racial bias at voir dire” because
    “[g]eneric questions about juror impartiality may not expose specific attitudes or biases
    that can poison jury deliberations. Yet more pointed questions ‘could well exacerbate
    whatever prejudice might exist without substantially aiding in exposing it.’” (quoting
    Rosales-Lopez, 
    451 U.S. at 195
     (Rehnquist, J., concurring in the result))).
    18
    The district court declined Mercado-Gracia’s request to show the video to the
    jury venire, ruling that “[s]howing the video is not necessary to protect Defendant’s
    right to a fair and impartial criminal jury under the Sixth Amendment and is an
    inefficient use of Court time.” (I R. 759.) While a trial court, in the exercise of its
    discretion, might decide to show such a video during voir dire, we cannot say here
    that the court abused its discretion in declining to do so.
    On appeal, in support of his argument that the trial court abused its discretion
    in declining to play the video for the jury venire, Mercado-Gracia relies on case law
    addressing a different question—when a trial court must, at the defense’s request, ask
    prospective jurors about the possibility that racial or ethnic prejudice might impact
    their ability to judge the evidence in a given case fairly and impartially.7 But here, at
    the request of both the Government and the defense, the trial court asked prospective
    jurors the following question:
    So you have heard the charges involving the possession of heroin
    and possession of a firearm in connection with the drug charge.
    7
    Among other cases, Mercado-Gracia cites Rosales-Lopez, 451 U.S at 189-92
    (noting that, when the defendant requests it, the Constitution requires an inquiry into
    prospective jurors’ potential racial or ethnic bias only under “special circumstances”
    where race is inextricably bound with the conduct of the trial, and that under the
    Court’s supervisory authority federal courts must also permit inquiry into prospective
    jurors’ racial or ethnic bias when the defendant is accused of a violent crime
    committed against a victim of a different race than the defendant); Ham v. South
    Carolina, 
    409 U.S. 524
    , 525-27 (1973) (holding trial court was constitutionally
    required to ask prospective jurors, at the defense’s request, about their possible racial
    bias, where defendant accused of marijuana possession defended by asserting police
    framed him in retaliation for the defendant’s civil rights activism); and United States
    v. Aldridge, 
    283 U.S. 308
    , 309-15 (1931) (holding trial court in capital murder case
    erred in not questioning, at defense’s request, prospective white jurors about their
    possible racial bias against black defendant charged with killing white victim).
    19
    One thing I want to say to you is that the defendant is of Mexican
    ancestry and so what I want to know is whether any of you would be
    inclined to believe the defendant is guilty based on, you know nothing yet
    about the case, but based on the fact that he is of Mexican ancestry and is
    charged with these drug and firearm charges, any of you, are any of you
    inclined to think he is guilty based on those facts[?]
    (IV R. 246-47.) On appeal, Mercado-Gracia argues this question was “inadequate” to
    make “jurors . . . aware of their potential for unconscious biases. A juror is unlikely
    to be explicit about an implicit bias.” (Aplt. Br. 39.) But Mercado-Gracia cites no
    authority requiring a trial court to educate prospective jurors about implicit biases.
    Mercado-Gracia complains that the question the trial court asked prospective
    jurors “served only to inform the jurors of the defendant’s national origin, without
    asking questions designed to meaningfully reveal any prejudices.” (Id.) But at trial,
    defense counsel agreed to the wording of this question before the district court asked
    it. Furthermore, during voir dire, the attorneys for each side had an opportunity to
    pose other questions to prospective jurors. While defense counsel did ask several
    voir dire questions, counsel could have asked, but did not ask, prospective jurors
    about any biases they might have against Mexican nationals or immigrants. Instead,
    both defense counsel and the Government told the trial court they preferred that the
    court itself ask prospective jurors about potential prejudice. The court did so, using
    the question approved by both sides. Defense counsel did not request the trial court
    ask any further questions.8
    8
    Before trial, defense counsel suggested three specific voir dire questions inquiring
    about possible racial prejudice. The district court ruled that it would “take up the
    20
    At the conclusion of trial, the court instructed jurors that it was the
    Government’s “burden of proving the defendant guilty beyond a reasonable doubt,”
    and it was jurors’ “duty to base [their] verdict solely upon the evidence, without
    prejudice or sympathy. That was the promise that you made and the oath you took.”
    (I R. 965, 975.)
    Under these circumstances, we cannot conclude that the district court abused
    its discretion in the manner in which the court conducted voir dire.
    III. CONCLUSION
    For the foregoing reasons, we AFFIRM Mercado-Gracia’s three convictions.
    issues regarding specific questions during the voir dire outside the presence of the
    jury, after the Court conducts its voir dire.” (I R. 759.) During voir dire, however,
    defense counsel did not request that the court ask the specific questions counsel had
    previously proposed, nor did counsel seek to pose those question herself to the jury
    venire.
    21