United States v. Pina-Aboite ( 2004 )


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  •                                                                         F I L E D
    United States Court of Appeals
    Tenth Circuit
    UNITED STATES COURT OF APPEALS
    AUG 16 2004
    TENTH CIRCUIT
    PATRICK FISHER
    Clerk
    UNITED STATES OF AMERICA,
    Plaintiff-Appellant,
    v.                                                     No. 04-2036
    MARTIN PINA-ABOITE,                                 (D. New Mexico)
    RAUL DEL ROSARIO SEPULVEDA,
    (D.C. No. 03-1097 JC)
    Defendants-Appellees.
    ORDER AND JUDGMENT *
    Before HENRY , LUCERO , Circuit Judges, and      FIGA , ** District Judge.
    Defendants-appellees Martin Pina-Aboite and Raul Del Rosario Sepulveda
    were stopped on the highway by a New Mexico police officer for what appeared
    to be an expired vehicle tag. Although the officer discovered that the tag was
    valid, he continued to question the defendants and obtained their consent to
    search the vehicle. The search uncovered eleven pounds of crystal
    *
    This order and judgment is not binding precedent, except under the
    doctrines of law of the case, res judicata, and collateral estoppel. The court
    generally disfavors the citation of orders and judgments; nevertheless, an order
    and judgment may be cited under the terms and conditions of 10 TH C IR . R. 36.3.
    **
    The Honorable Philip S. Figa, United States District Judge for the
    District of Colorado, sitting by designation.
    methamphetamine hidden in the gas tank. The defendants were indicted for
    conspiracy to possess and possession with intent to distribute over 500 grams of
    methamphetamine, in violation of 
    21 U.S.C. §§ 846
    , 841(a)(1), 841(b)(1)(A), and
    
    18 U.S.C. § 2
    . Following a hearing on September 22, 2003, the district court
    granted the defendants’ motion to suppress evidence obtained following the stop
    of their vehicle. On November 17, 2003, the district court granted the
    government’s motion for reconsideration and denied defendants’ motion to
    suppress. On March 11, 2004, the district court granted defendants’ motion for
    reconsideration and once again granted their motion to suppress.
    We hold that the police officer had no justification for detaining the
    defendants after the original purpose of the traffic stop was met and that the
    detention violated the defendants’ Fourth Amendment rights. Moreover, we hold
    that the consent to search was not sufficient to purge the taint of the illegal
    detention. Accordingly, we affirm the district court’s grant of the defendants’
    motion to suppress.
    BACKGROUND
    On May 21, 2003, New Mexico Police Officer Nick Ramos was patrolling
    Interstate 25 north of Santa Fe and observed the defendants in a Nissan Maxima
    bearing a Nebraska license plate displaying the number “02.” Believing that the
    2
    vehicle tag had expired, Officer Ramos pulled the defendants over. The camera
    mounted to the dashboard of Officer Ramos’ police car recorded the traffic stop.
    The audio recording did not pick up all of the conversation because at times the
    audio signal was not received from Officer Ramos’ body microphone. Much of
    the conversation transpired in Spanish, and a translator prepared a transcription of
    the audible portions of the tape. Officer Ramos does not speak fluent Spanish,
    which led to some confusion in his communications with the defendants.
    As Officer Ramos walked by the rear of the car, he looked at the license
    plate, and he still saw only the “02” on the sticker. Officer Ramos approached the
    passenger side window and asked the driver, Mr. Pina-Aboite, for his license and
    the registration and insurance papers. Mr. Pina-Aboite handed the officer each
    document separately. As Mr. Pina-Aboite handed the documents to Officer
    Ramos, he told him that the car belonged to Mr. Sepulveda. Officer Ramos asked
    for Mr. Sepulveda’s identification, which Mr. Sepulveda handed to him.
    Officer Ramos testified that as the defendants handed over their documents,
    Mr. Pina-Aboite’s hand was shaking, Mr. Sepulveda refused to make eye contact,
    and the defendants’ chests were moving in an “exaggerated and definitive”
    manner. Aplt’s App. at 40 (Tr. of Hr’g on Motion to Suppress, Sept. 17, 2003).
    Officer Ramos. He testified that this behavior aroused his suspicions because
    they indicated “very, very strong nervousness.” 
    Id. at 45
    .
    3
    Officer Ramos asked Mr. Pina-Aboite to get out of the car and walk to the
    rear. Mr. Pina-Aboite did so, and Officer Ramos explained why he had stopped
    the car. Mr. Pina-Aboite approached the Nissan’s license plate and explained that
    the “02” sticker indicated the month February, not the year 2002. The officer
    examined the license plate and identified the year “2004” in smaller lettering
    alongside the “02.” At that point, Officer Ramos was satisfied that there was no
    traffic infraction. He later testified that he “wouldn’t have bothered” to stop the
    car had he seen that the sticker on the plate read “2004.” Aplt’s App. at 97.
    However, Officer Ramos continued to talk to Mr. Pina-Aboite and to retain
    the documents that the defendants had given him. Officer Ramos testified that he
    did so because “there were a lot of things that, based on [his] training and
    experience, just wasn’t [sic] right.” 
    Id. at 46
    . Officer Ramos cited “the totality
    of the circumstances” for his suspicions, including “everything that was said; the
    mannerisms; the very, very strong nervousness presented by not just the driver,
    but the passenger; and his actions towards me; . . . [and the fact that] the driver
    had identified that the vehicle belonged to the passenger, and he was present in
    the vehicle.” 
    Id. at 45
    . Officer Ramos also felt that he needed to complete his
    review of the driver’s license, registration, and insurance information.
    Officer Ramos asked Mr. Pina-Aboite to step to the side of the police car
    and questioned him about where he was coming from and where he was going.
    4
    Mr. Pina-Aboite responded that he and Mr. Sepulveda were coming “[f]rom
    Sinaloa, [Mexico,] . . . when we went we left the car in Phoenix, Arizona, and
    now we are going to Nebraska.” Aplt’s App. at 183 (Tr. of Videotaped Traffic
    Stop). Officer Ramos then asked how long they had been in Phoenix, and Mr.
    Pina-Aboite responded, “No, I was not in Phoenix.” 
    Id.
     Officer Ramos testified
    that he found these statements to be contradictory. Officer Ramos next asked
    what the defendants were doing in Mexico and how long they were there. Mr.
    Pina-Aboite replied that they were visiting for Mother’s Day and that they had
    been there for two months. Officer Ramos asked to whom the car belonged, and
    Mr. Pina-Aboite again told him that it belonged to his brother, Mr. Sepulveda.
    Officer Ramos then told Mr. Pina-Aboite to wait by the police car while he
    checked the VIN on the car against the registration papers. He approached the
    Nissan and viewed the VIN on the dashboard through the windshield. He found
    the numbers matched and found no evidence that the VIN plate had been altered.
    He then opened the driver’s side door to view the VIN plate on the inside of the
    door. Mr. Sepulveda was still sitting in the front passenger seat. Officer Ramos
    told him why he had stopped the car and that he was checking the VIN. Officer
    Ramos then asked Mr. Sepulveda about where he had been, and Mr. Sepulveda
    replied that they had been in Mexico on an emergency because his mother had
    been ill. Officer Ramos testified that in part of the conversation not recorded on
    5
    his microphone, Mr. Sepulveda said they had been in Mexico for ten days, and
    that they had dropped the car off in Phoenix and taken a bus to Sinaloa.
    Officer Ramos returned to Mr. Pina-Aboite and asked him again about the
    length and reason for the trip to Mexico. Mr. Pina-Aboite reaffirmed his story
    that they had been there for two months for Mother’s Day. Officer Ramos
    testified that at this point his suspicions were heightened by the discrepancies in
    the two defendants’ stories about their travels. He also found suspicious the
    claim that the two were brothers, because he could find no common last name in
    their identification documents.
    Nevertheless, Officer Ramos returned all of the identification documents to
    Mr. Pina-Aboite and thanked him. As Mr. Pina-Aboite started back toward the
    Nissan, Officer Ramos called after him in Spanish, “¿Sabes que?” or “You know
    what?” and then said “Um, this car?” Aplt’s App. at 186. Mr. Pina-Aboite turned
    and walked back to Officer Ramos, asking whether he needed to change his
    license plate. Officer Ramos replied that he did not, then asked him several
    questions about where and how they had crossed the border. The officer asked
    whether they were carrying much money, or any drugs or weapons, and Mr. Pina-
    Aboite answered no each time. Officer Ramos then asked, “[M]ay I search?” and
    Mr. Pina-Aboite agreed. 
    Id. at 187
    . Mr. Pina-Aboite gave consent to search
    approximately two minutes after Officer Ramos returned the documents to him.
    6
    Officer Ramos did not inform Mr. Pina-Aboite that he had the right to refuse
    consent.
    Around the time Mr. Pina-Aboite agreed orally to the search, another
    officer arrived with a drug-sniffing dog. Officer Ramos approached Mr.
    Sepulveda and again asked him about the reason for their trip and asked him
    whether they were carrying various forms of contraband. Mr. Sepulveda replied
    no to each question; the officer then asked him for permission to search, and Mr.
    Sepulveda agreed. Officer Ramos did not inform Mr. Sepulveda that he had the
    right to refuse consent. Officer Ramos asked Mr. Sepulveda to step out of the car
    and to stand on a nearby grassy bank, separated from Mr. Pina-Aboite.
    Officer Ramos gave each defendant a consent form, which was written in
    Spanish and English, and which each defendant signed. The forms advised of the
    right to refuse consent. Officer Ramos did not read the forms to the defendants,
    nor ask if they understood them.
    Officer Ramos then asked each defendant if he could use the dog to search
    the car, telling them that the search would go faster that way, and each assented.
    The search of the car uncovered eleven pounds of crystal methamphetamine in the
    gas tank. After being advised of their Miranda rights, both defendants said they
    had put the drugs in the gas tank.
    Mr. Pina-Aboite and Mr. Sepulveda were indicted for conspiracy to possess
    7
    and possession with intent to distribute over 500 grams of methamphetamine, in
    violation of 
    21 U.S.C. §§ 846
    , 841(a)(1), and 841(b)(1)(A). Following a hearing
    on September 22, 2003, the district court granted defendants’ motion to suppress
    evidence. On November 17, 2003, the district court granted the government’s
    motion for reconsideration and denied defendants’ motion to suppress. On March
    11, 2004, the district court granted defendants’ motion for reconsideration and
    again granted their motion to suppress. In this second order to suppress, the
    district court found (1) the initial stop was valid based on Officer Ramos’ belief
    that the license plate had expired; (2) “[c]ontinued detention of the Defendants
    without reasonable suspicion after Officer Ramos determined the license plate
    was current was in violation of Defendants’ Fourth Amendment protections”; and
    (3) “[t]he government failed to meet its burden to show that a subsequent,
    voluntary consent by Defendants purged the taint of such violation.” Aplt’s App.
    at 212 (Order, dated Mar. 11, 2004). The government’s appeal followed.
    Below we discuss the government’s arguments that (A) Officer Ramos’
    detention of the defendants did not violate their Fourth Amendment rights
    because (1) Officer Ramos was justified in completing his review of the
    defendants’ driver’s licenses, registration, and insurance; and (2) Officer Ramos
    had developed reasonable suspicion based on the defendants’ nervousness and Mr.
    Sepulveda’s avoidance of eye contact. In the alternative, the government argues
    8
    that (B) even if at some point the detention became illegal, when Officer Ramos
    returned the identification documents to Mr. Pina-Aboite, the traffic detention
    ended, and the illegal detention “transformed into a consensual encounter, which
    was an intervening event freeing the subsequent consent to search from any
    illegality.” Aplt’s Br. at 28.
    Standard of Review
    “When reviewing an order granting or denying a motion to suppress, we
    accept the district court’s factual findings unless they are clearly erroneous, and
    we view the evidence in the light most favorable to the district court’s
    determination.” United States v. Caro, 
    248 F.3d 1240
    , 1243 (10th Cir. 2001).
    “[A]t a hearing on a motion to suppress, the credibility of the witnesses and the
    weight given to the evidence, as well as the inferences and conclusions drawn
    therefrom, are matters for the trial judge.” United States v. Fernandez, 
    18 F.3d 874
    , 876 (10th Cir. 1994). “However, the ultimate determination of
    reasonableness under the Fourth Amendment is a question of law which we
    review de novo.” Caro, 
    248 F.3d at 1243
    .
    A. Legality of Detention
    The Fourth Amendment protects individuals from “unreasonable searches
    9
    and seizures.” U.S. C ONST . amend. IV. “A traffic stop is a ‘seizure’ within the
    meaning of the Fourth Amendment, even though the purpose of the stop is limited
    and the resulting detention quite brief.” United States v. Holt, 
    264 F.3d 1215
    ,
    1220 (10th Cir. 2001) (en banc) (internal quotation marks omitted). “A routine
    traffic stop is analogous to an investigative detention and is analyzed under the
    principles stated in Terry v. Ohio, 
    392 U.S. 1
     (1968).” Caro, 
    248 F.3d at 1244
    .
    “To determine the reasonableness of an investigative detention, we make a
    dual inquiry. First, we ask whether the officer’s action was justified at its
    inception, and second, whether it was reasonably related in scope to the
    circumstances which justified the interference in the first place.” 
    Id.
     (internal
    quotation marks omitted). “Thus, we assess the reasonableness of a traffic stop
    based on an observed violation by considering the scope of the officer’s actions
    and balancing the motorist’s legitimate expectation of privacy against the
    government’s law-enforcement-related interests.” Holt, 
    264 F.3d at 1220
    .
    1.    Regulatory Purpose of Traffic Stops
    It is undisputed that the initial stop of the defendants’ car was justified by
    Officer Ramos’ reasonable articulable suspicion that the Nissan’s license plate
    had expired. Although this suspicion was dispelled almost immediately, the
    government argues that Officer Ramos’ detention of the defendants was lawful
    without further reasonable suspicion because “[o]nce a lawful traffic stop has
    10
    been made, and the officer has routinely requested license, registration, and
    insurance information, his investigation of the occupants’ identity and the
    vehicle’s ownership serves a proper regulatory purpose that is independent of the
    traffic-infraction violation.” Aplt’s Br. at 20 (relying on Delaware v. Prouse, 
    440 U.S. 648
    , 658 (1979) (acknowledging the States’ “vital interest in ensuring that
    only those qualified to do so are permitted to operate motor vehicles, that these
    vehicles are fit for safe operation, and hence that licensing, registration, and
    vehicle inspection requirements are being observed”)). The government would
    have us hold that so long as “there is a reasonable-suspicion justification for the
    detention at the time the officer begins his regulatory check of license and
    registration information,” he is entitled to further detain a driver to complete his
    review of the documents – even if his reasonable suspicion is immediately
    dispelled. Id. at 21-22.
    As a preliminary matter, we note that the government’s argument was not
    adequately raised before the district court. The government concedes that it “did
    not initiate the argument that the continuation of the stop was justified by a
    regulatory purpose,” but contends that it may defend the district court’s ruling on
    the government’s motion for reconsideration that Officer Ramos had not
    completed his review of the defendants’ information at the time he determined no
    traffic violation had occurred. Aplt’s Reply Br. at 2 n.1 (citing Aplt’s App. at
    11
    174-76). Because “[i]t is within our discretion to decide on a case-by-case basis
    which questions to address for the first time on appeal,” Thompson v. United
    States, 
    223 F.3d 1206
    , 1211 (10th Cir. 2000), we will reach the issue.
    During a typical traffic stop, an officer “may request a driver’s license and
    vehicle registration, run a computer check, and issue a citation.” Caro, 
    248 F.3d at 1244
    . Also, “questions relating to a driver’s travel plans ordinarily fall within
    the scope of a traffic stop.” United States v. Williams, 
    271 F.3d 1262
    , 1267 (10th
    Cir. 2001). While an “officer may detain the driver and his vehicle as long as
    reasonably necessary to make these determinations and to issue a citation or
    warning,” United States v. Wood, 
    106 F.3d 942
    , 945 (10th Cir. 1997), “[t]he
    scope of the detention must be carefully tailored to its underlying justification.”
    Florida v. Royer, 
    460 U.S. 491
    , 500 (1983).
    [A]n investigative detention must be temporary and last no longer than
    is necessary to effectuate the purpose of the stop. Similarly, the
    investigative methods employed should be the least intrusive means
    reasonably available to verify or dispel the officer’s suspicion in a short
    period of time.
    
    Id.
     Indeed, “motorists ordinarily expect to be allowed to continue on their way once
    the purposes of a stop are met.” Holt, 
    264 F.3d at 1221
    .
    The cases relied upon by the government permitting a prolonged detention
    for regulatory checks of identification documents and questioning about travel
    12
    plans are distinguishable from the instant case because they all involved traffic
    stops in which citations were actually warranted, such that the regulatory checks
    and questions were at all times supported by reasonable suspicion. See Williams,
    
    271 F.3d at 1264-65
     (defendant clocked exceeding the speed limit); United States
    v. West, 
    219 F.3d 1171
    , 1174 (10th Cir. 2000) (same); Wood, 
    106 F.3d at 944
    (same); United States v. Rivera, 
    867 F.2d 1261
    , 1262 (10th Cir. 1989) (defendant
    observed tailgating). In this case, however, Officer Ramos’ suspicion that a
    traffic violation had occurred was dispelled almost immediately after he stopped
    the defendants and he observed that the vehicle’s license plate was current.
    Nevertheless, Officer Ramos prolonged the detention, retaining the defendants
    identification documents for several minutes, questioning the defendants
    extensively, and checking the VIN on the car two separate times.
    In United States v. McSwain, 
    29 F.3d 558
     (10th Cir. 1994), we held that
    when an officer stopped the defendant for the sole purpose of ensuring the
    validity of the vehicle’s registration sticker, and upon approaching the car
    observed that the sticker was valid, “the purpose of the stop was satisfied. [The
    officer’s] further detention of the vehicle to question [defendant] about his
    vehicle and travel itinerary and to request his license and registration exceeded
    the scope of the stop’s underlying justification.” 
    Id. at 561
    . The government
    attempts to distinguish McSwain on the basis that Officer Ramos did not learn
    13
    that the registration sticker was current until after he had requested the
    defendants’ identification documents. This difference in timing is irrelevant
    because when Officer Ramos’ suspicion regarding the validity of the license plate
    was dispelled, the sole purpose of the stop was met, as in McSwain. He was not
    justified in extending the scope of the detention, and he should have returned the
    defendants’ documents and allowed them to continue on their way. See McSwain,
    
    29 F.3d at 562
     (recommending that “[a]s a matter of courtesy, the officer could
    explain to drivers in [such] circumstances the reason for the initial detention and
    then allow them to continue on their way”).
    In United States v. Valadez, 
    267 F.3d 395
     (5th Cir. 2001), an officer
    stopped a car that appeared to have an expired vehicle registration sticker on the
    front windshield and illegal window tinting on other windows. After making
    contact with the driver, the officer acknowledged that the sticker was valid but
    that the window tint appeared to be illegal. Before retrieving a window-tint meter
    from his patrol car, the officer asked the driver for his driver’s license and
    insurance card, both of which appeared to be valid. When the officer returned to
    his patrol car to get the window-tint meter, he requested a computer check of the
    driver’s license, and the driver’s outstanding warrants and criminal history. While
    the computer checks were in progress, the officer returned to the vehicle,
    inspected the window tint, and determined that it was legal. However, the officer
    14
    continued to detain and question the driver, who admitted that he was carrying
    weapons in his car. When further inquiry revealed that the driver had a felony
    record, he was charged with being a felon in possession of a weapon.
    However, the Fifth Circuit held that in the absence of reasonable suspicion
    beyond that which led to the initial stop,
    [f]urther detention was not lawful after the point at which the purposes
    of the stop was resolved – that is, when Officer Slubar determined that
    Valadez had a proper inspection sticker and proper window tinting.
    There was then no further reason to detain Valadez, and all that
    followed thereafter contravened Valadez’s Fourth Amendment rights.
    Therefore, because the relevant period of lawful detention at issue
    expired, all evidence that followed, including Valadez’s responses to
    the questions, his guns, and his criminal record should be suppressed.
    
    Id. at 398
    .
    Similarly, we hold that once Officer Ramos became aware that there was no
    traffic violation, it was unreasonable and a violation of the Fourth Amendment to
    extend the scope of the detention for the purpose of inspecting the defendants’
    identification, registration, and insurance documents. Although Officer Ramos
    defends his prolonged detention of the defendants based on their supposedly
    inconsistent descriptions of their travel plans and his doubt of their claim to be
    brothers, these statements were made after Officer Ramos determined that the
    licence plate sticker was valid. Therefore, they were tainted by the unlawful
    detention and cannot contribute to the reasonable suspicion inquiry. 
    Id.
    We note that as part of Officer Ramos’ regulatory investigation of the
    15
    defendants’ identification documents, he checked the VIN plates on the vehicle
    against the car’s registration two separate times, looking through the windshield
    to examine the dashboard plate and opening the car door to view the plate on the
    interior of the driver’s side door panel. This procedure contravenes our holding
    in Caro that “where the dashboard VIN plate is readable from outside the
    passenger compartment, that VIN matches the VIN listed on the registration, and
    there are no signs the plate has been tampered with, there is insufficient cause for
    an officer to extend the scope of a detention by entering a vehicle’s passenger
    compartment for the purpose of further examining any VIN.” 
    248 F.3d at 1246
    .
    It was during Officer Ramos’ check of the interior VIN that he questioned Mr.
    Sepulveda about the defendants’ travel plans and became suspicious based on the
    inconsistencies between his and Mr. Pina-Aboite’s stories. Under Caro, Mr.
    Sepulveda’s statements would be suppressed as the fruit of an illegal search, and
    so could not contribute to Officer Ramos’ reasonable suspicion of illegal activity.
    
    Id. at 1248
    .
    2.    Reasonable Suspicion of Illegal Activity
    Although we have held that Officer Ramos was not justified in prolonging
    the defendants’ detention for a regulatory purpose, it is permissible for an officer
    to detain a driver for further questioning beyond that related to the traffic initial
    stop “if he has an objectively reasonable and articulable suspicion illegal activity
    16
    has occurred or is occurring.” United States v. Hunnicutt, 
    135 F.3d 1345
    , 1349
    (10th Cir. 1998). “Reasonable suspicion is a minimal level of objective
    justification which the officers can articulate, as distinct from an inchoate and
    unparticularized suspicion or hunch.” United States v. Valles, 
    292 F.3d 678
    , 680
    (10th Cir. 2002) (internal quotation marks omitted). Reviewing courts making
    reasonable-suspicion determinations “must look at the ‘totality of the
    circumstances’ of each case to see whether the detaining officer has a
    ‘particularized and objective basis’ for suspecting legal wrongdoing.” United
    States v. Arvizu, 
    534 U.S. 266
    , 273 (2002).
    The government argues that at the time that Officer Ramos discovered that
    the vehicle’s registration sticker was valid, he had an objectively reasonable and
    articulable suspicion of illegal activity based on “the defendants’ excessive
    nervousness” – which Officer Ramos deduced from their “shaking hands and
    heavy breathing”– and Mr. Sepulveda’s avoidance of eye contact. Aplt’s Br. at
    25; see United States v. Walker, 
    933 F.2d 812
    , 817 n.3 (10th Cir. 1991) (“The
    general term ‘nervousness’ encompasses an almost infinite variety of behaviors.
    No doubt there are circumstances in which an individual’s nervous behavior
    would give rise to a reasonable suspicion of criminal activity.”); United States v.
    Chavez-Valenzuela, 
    268 F.3d 719
    , 727 n.6 (9th Cir. 2001) (“[A]voidance of eye
    contact is a common sign of nervousness.”).
    17
    The district court concluded that under the circumstances the defendants’
    nervousness did not give rise to a reasonable articulable suspicion of illegal
    activity. “We must accept this determination unless it is clearly erroneous.”
    Walker, 
    933 F.2d at 817
    .
    “We have repeatedly held that nervousness is of limited significance in
    determining reasonable suspicion and that the government’s repetitive reliance on
    the nervousness of either the driver or passenger as a basis for reasonable
    suspicion in all cases of this kind must be treated with caution.” Fernandez, 
    18 F.3d at 879
     (internal quotation marks omitted). “It is certainly not uncommon for
    most citizens – whether innocent or guilty – to exhibit signs of nervousness when
    confronted by a law enforcement officer.” Wood, 
    106 F.3d at 948
    . Thus, “courts
    should discount the detaining officer’s reliance on the detainee’s nervousness.”
    United States v. Johnson, 
    364 F.3d 1185
    , 1192 (10th Cir. 2004) (internal
    quotation marks omitted); United States v. Salzano, 
    158 F.3d 1107
    , 1113 (10th
    Cir. 1998) (“[A]bsent signs of nervousness beyond the norm, we will discount the
    detaining officer’s reliance on the detainee’s nervousness as a basis for
    reasonable suspicion.”).
    Using nervousness as a factor in establishing reasonable suspicion is
    especially “troublesome” when there is a “complete lack of evidence in the record
    that [the detaining officer] had any prior knowledge of [the defendants] to make
    18
    an evaluation of their behavior.” Fernandez, 
    18 F.3d at
    879 (citing United States
    v. Bloom, 
    975 F.2d 1447
    , 1458 (10th Cir.1992) (“Nothing in the record indicates
    whether Agent Ochoa had any prior knowledge of Defendant, so we do not
    understand how Agent Ochoa would know whether Defendant was acting nervous
    and excited or whether he was merely acting in his normal manner. Rather,
    Defendant’s appearance to Agent Ochoa is nothing more than an inchoate
    suspicion or hunch.”) (internal quotation marks and citations omitted), overruled
    in part on other grounds by United States v. Little, 
    18 F.3d 1499
    , 1504 n.5 (10th
    Cir. 1994)); Wood, 
    106 F.3d at 948
     (noting that the officer “had no prior
    acquaintance with Mr. Wood which enabled the trooper to contrast Mr. Wood’s
    behavior during the traffic stop with his usual demeanor”). Officer Ramos’
    conclusion that the defendants were exhibiting nervous behavior is a “subjective
    evaluation” made without any prior knowledge of their usual demeanor, making it
    less significant in formulating a reasonable suspicion. Bloom, 975 F.2d at 1458.
    “While nervousness may . . . appear as a factor in many traffic stop cases,
    we have never held that by itself it creates a reasonable suspicion of criminal
    activity.” Fernandez, 
    18 F.3d at 880
    ; Salzano, 
    158 F.3d at 1113
     (“Nervousness
    alone cannot support reasonable suspicion of criminal activity.”). As in
    Fernandez, there is
    an important distinction between this case and our other cases in this
    area. More specifically, a defining characteristic of our traffic stop
    19
    jurisprudence is the defendant’s lack of a valid registration, license, bill
    of sale, or some other indicia of proof to lawfully operate and possess
    the vehicle in question, thus giving rise to objectively reasonable
    suspicion that the vehicle may be stolen.
    Id. at 879 (collecting cases). The defendants provided Officer Ramos with valid
    licenses, registration, and insurance. Officer Ramos could not “justify the
    continued detention . . . based on any specific, objective factors supporting a
    reasonable inference that the [vehicle] was stolen, that the defendant[s] [were]
    trafficking in drugs, or that [they] were committing any other criminal offense.”
    Id. at 880.
    Indeed, Officer Ramos’ testimony suggests that he was acting on an
    inchoate and unparticularized hunch rather than a reasonable articulable
    suspicion. He testified that his
    suspicions just rose simply because, again, of the totality of the
    circumstances; not one factor, not an individual factor, but all of them.
    . . . I believed that there was criminal activity afoot, there was
    something wrong; but yet, there was nothing indicating that it would be
    just a stolen vehicle or drugs or a warrant or something else,
    Aplt’s App. at 56-57; “there were a lot of things that, based on my training and
    experience, just wasn’t [sic] right,” id. at 46; “I didn’t know what at the time; but
    as the time went on . . . it was obvious that something was definitely not right.”
    Id. at 127. See Fernandez, 
    18 F.3d at 880
     (holding that there was insufficient
    evidence of officer’s reasonable suspicion and noting that officer’s “testimony
    20
    regarding his ‘sixth sense,’ his detection of a ‘tension in the air,’ and his belief
    that something was ‘afoot,’ strongly suggests he was acting more on an
    unparticularized hunch than on reasonable and objective suspicion”).
    After reviewing the record, we cannot find clear error in the district court’s
    finding that Officer Ramos’ observation of the defendants’ shaking hands, heavy
    breathing, and avoidance of eye contact were insufficient to support a reasonable
    suspicion of illegal activity. Officer Ramos’ continued detention of the
    defendants in the absence of such suspicion was a violation of their Fourth
    Amendment rights.
    B. Effect of Consent to Search
    We hold that Officer Ramos’ prolonged detention of the defendants was
    supported neither by the regulatory purpose of checking their identification
    documents nor by a reasonable suspicion of illegal activity. However, “[a] search
    preceded by a Fourth Amendment violation remains valid if the consent to search
    was voluntary in fact under the totality of the circumstances.” Fernandez, 18
    F.3d at 881. “When there has been such a violation, the government bears the
    heavy burden of showing that the primary taint of that violation was purged. To
    satisfy this burden, the government must prove, from the totality of the
    circumstances, a sufficient attenuation or break in the causal connection between
    21
    the illegal detention and the consent.” Caro, 
    248 F.3d at 1247
     (internal quotation
    marks and citations omitted).
    Although no single factor is dispositive,
    [t]he Supreme Court has provided three factors that are especially
    relevant to determining whether a consent is tainted by a preceding
    illegal search or seizure: 1) the temporal proximity between the police
    illegality and the consent to search; 2) the presence of intervening
    circumstances; and particularly 3) the purpose and flagrancy of the
    official misconduct.
    United States v. Melendez-Garcia, 
    28 F.3d 1046
    , 1054 (10th Cir. 1994) (citing
    Brown v. Illinois, 
    422 U.S. 590
    , 603-04 (1975)). Because the issue of the purging
    of the taint of a Fourth Amendment violation “is fact-intensive, the district
    court’s findings must be upheld unless they are clearly erroneous.” United States
    v. Eylicio-Montoya, 
    70 F.3d 1158
    , 1165 (10th Cir. 1995).
    1.    Temporal Proximity
    As discussed above, the detention became illegal when Officer Ramos
    prolonged the detention past the point at which he determined that the vehicle’s
    license plate was not expired. The defendants granted verbal consent to search
    and signed the consent forms only a matter of minutes later. “We have repeatedly
    held that consent is not voluntary when in such close temporal proximity to an
    illegal [detention].” Gregory, 79 F.3d at 979-80 (citing McSwain, 
    29 F.3d at 563
    (holding that consent was not voluntary when obtained ‘only a few minutes’ after
    22
    the illegal seizure); Fernandez, 
    18 F.3d at 883
     (holding that consent was not
    voluntary when ‘only moments’ elapsed between illegal detention and seizure);
    and United States v. Maez, 
    872 F.2d 1444
    , 1455 (10th Cir. 1989) (holding that
    taint of illegal seizure not purged when consent form signed 45 minutes later)).
    2.    Intervening Circumstances
    The government argues that “there was a very significant ‘intervening
    circumstance,’ between the presumed illegality and the consent.” Aplt’s Reply
    Br. at 10. The government asserts that when Officer Ramos returned the
    identification documents to Mr. Pina-Aboite and thanked him, the illegal
    detention ended, and the subsequent interaction between Officer Ramos and the
    defendants was a consensual encounter, which attenuated the taint of the illegal
    detention. We disagree.
    Although in evaluating whether an encounter with law enforcement became
    consensual, we apply an objective standard, United States v. Manjarrez, 
    348 F.3d 881
    , 885-86 (10th Cir. 2003) (“An encounter is consensual when a reasonable
    person would believe he was free to leave or disregard the officer’s request for
    information.”),
    [i]n applying the second factor in Brown, we look only from the
    defendant’s perspective in determining whether any intervening event
    occurred which isolates the defendant from the coercive effects of the
    original illegal stop so as to render his subsequent consent voluntary in
    fact. For consent obtained subsequent to an illegal detention to be
    23
    voluntary in fact, there must be proof of facts or events which ensure
    that the consent provided by the defendant is truly voluntary and not the
    fruit of the illegal stop. The facts or events must create a discontinuity
    between the illegal stop and the consent such that the original illegality
    is weakened and attenuated.
    Gregory, 79 F.3d at 980 (emphasis added).
    After Officer Ramos returned the identification documents to Mr. Pina-
    Aboite and thanked him, he immediately called after Mr. Pina-Aboite, saying,
    “You know what? Um, this car?” Aplt’s App. at 186. Mr. Pina-Aboite turned
    around and walked directly back to Officer Ramos, asking “Do I need to change
    the plates or what?” Id. Officer Ramos responded in the negative, and then
    proceeded to ask Mr. Pina-Aboite a series of questions about where the
    defendants had crossed to the border and whether they were carrying any drugs or
    weapons, culminating in his request to search the car.
    Although we have established a bright-line rule that an encounter
    initiated by a traffic stop may not be deemed consensual unless the
    driver’s documents have been returned to him, a finding that a driver’s
    documentation was returned does not end the matter, as we have
    specifically indicated this is not always sufficient to demonstrate that
    an encounter has become consensual.
    United States v. Bustillos-Munoz, 
    235 F.3d 505
    , 515 (10th Cir. 2000) (internal
    quotation marks and citations omitted). “Although not prerequisites, in
    determining whether consent is voluntary when given following the return of
    defendants’ documents, we look at such factors as whether the officer informed
    24
    the defendant that he was free to leave the scene or that he could refuse to give
    consent.” Gregory, 79 F.3d at 979. See also Florida v. Bostick, 
    501 U.S. 429
    ,
    432 (1991) (stating that informing a defendant of his right to refuse consent is a
    factor “particularly worth noting”); United States v. Mendenhall, 
    446 U.S. 544
    ,
    558 (1980) (noting that verbal advisement to defendant that she could decline
    consent was “especially significant”). In McSwain, we held that “[the
    defendant’s] consent was not sufficiently an act of free will to purge the primary
    taint of the illegal detention,” observing that
    though [the officer’s] return of [the defendant’s] identification and the
    vehicle registration may be a factor indicating that [the defendant] was
    free to leave, [the officer] failed to specifically inform [the defendant]
    that he was free to leave the scene or that he could refuse to give his
    consent. These are important factors in our consideration.
    
    29 F.3d at 563
     (internal quotation marks and citations omitted).
    When he returned the documents, Officer Ramos did not tell Mr. Pina-
    Aboite that he was free to leave, and he immediately reinitiated conversation with
    him about the car, the subject matter of the stop. Indeed, Mr. Pina-Aboite’s quick
    return to Officer Ramos and his question about the license plate indicates his
    concern that he was still in violation of the traffic laws and that he was not under
    the impression that the detention had ended. The district court’s finding that
    there was no intervening event creating a discontinuity between the illegal
    detention and his eventual consent was not clearly erroneous.
    25
    3.    Purpose and Flagrancy of Official Misconduct
    Finally, we examine the third Brown factor, the purpose and flagrancy of
    the official misconduct. Although Officer Ramos was justified in initially
    stopping the defendants based on his belief that the license plate was expired, his
    conduct following his discovery that there was no traffic violation was not
    justified, namely (a) his continued detention of the defendants in the absence of a
    reasonable suspicion of illegal activity; (b) his checking of the dashboard VIN in
    the absence of reasonable suspicion that the car was unregistered; (c) his
    unauthorized second check of the VIN on the door panel, problematic under Caro,
    and his concurrent questioning of Mr. Sepulveda; (d) his failure to advise Mr.
    Pina-Aboite that he was free to go upon return of his documents; (e) his calling
    Mr. Pina-Aboite back after returning his documents because he “wanted to see if
    [Mr. Pina-Aboite] would be able to provide information to sustain or dispel [his]
    suspicions,” Aplt’s App. at 90; and (f) his repetitive questioning about travel
    plans and whether the defendants were carrying various kinds of contraband.
    Officer Ramos’ behavior suggests that he detained the defendants “with a quality
    of purposefulness, embarking on a fishing expedition in the hope that something
    might turn up.” McSwain, 
    29 F.3d at 563
     (internal quotation marks and citations
    omitted); Caro, 
    248 F.3d at 1248
    .
    Under the totality of the circumstances, and with special emphasis on the
    26
    three Brown factors, we conclude that there was not “a sufficient attenuation or
    break in the causal connection between the illegal detention and the consent.”
    Caro, 
    248 F.3d at 1247
     (internal quotation marks omitted). Thus, we agree with
    the district court that the government failed to meet its heavy burden of proving
    that the defendants’ consent to search the car was untainted by the Fourth
    Amendment violation.
    CONCLUSION
    Although Officer Ramos’ initial traffic stop of the defendants was justified,
    he unlawfully detained them beyond the purposes of the stop. The defendants’
    subsequent consent to the search of the car was not sufficient to purge the taint of
    the illegal detention. Accordingly, we AFFIRM the district court’s grant of the
    defendants’ motion to suppress.
    Entered for the Court,
    Robert H. Henry
    Circuit Judge
    27