Commonwealth v. Buckley , 478 Mass. 861 ( 2018 )


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    SJC-12344
    COMMONWEALTH   vs.   ROGELIO R. BUCKLEY.
    Plymouth.      October 5, 2017. - February 14, 2018.
    Present:   Gants, C.J., Lenk, Gaziano, Lowy, Budd, Cypher, &
    Kafker, JJ.
    Controlled Substances. Constitutional Law, Search and seizure,
    Reasonable suspicion, Investigatory stop. Search and
    Seizure, Threshold police inquiry, Reasonable suspicion,
    Consent, Motor vehicle. Threshold Police Inquiry.
    Practice, Criminal, Motion to suppress.
    Indictments found and returned in the Superior Court
    Department on April 19, 2013.
    A pretrial motion to suppress evidence was heard by
    Cornelius J. Moriarty, II, J., and the cases were tried before
    Richard J. Chin, J.
    The Supreme Judicial Court granted an application for
    direct appellate review.
    Matthew Malm for the defendant.
    Mary E. Lee, Assistant District Attorney, for the
    Commonwealth.
    The following submitted briefs for amici curiae:
    Ivan Espinoza-Madrigal, of New York, Oren M. Sellstrom, &
    Oren N. Nimni for Lawyers' Committee for Civil Rights and
    Economic Justice & others.
    2
    Rebecca Kiley, Committee for Public Counsel Services, &
    Derege B. Demissie for Committee for Public Counsel Services &
    another.
    Jeff Goldman, Vanessa M. Brown, Matthew R. Segal, Rahsaan
    D. Hall, Jessie J. Rossman, & Carlton E. Williams for American
    Civil Liberties Union of Massachusetts.
    Daniel F. Conley, District Attorney, & John P. Zanini,
    Cailin M. Campbell, & David D. McGowan, Assistant District
    Attorneys, for District Attorney for the Suffolk District.
    CYPHER, J.   In this appeal we are asked to reconsider one
    tenet of our search and seizure jurisprudence:   that a traffic
    stop constitutes a "reasonable" "seizure" for purposes of art.
    14 of the Massachusetts Declaration of Rights where a police
    officer has observed a traffic violation, notwithstanding the
    officer's underlying motive for conducting the stop.   See
    Commonwealth v. Santana, 
    420 Mass. 205
    (1995).   For the sound
    legal and practical reasons discussed below, we decline to
    depart from that tenet as the general standard governing the
    validity of traffic stops under art. 14.   We affirm the denial
    of the defendant's motion to suppress, and we also affirm the
    judgment of conviction.
    Facts. We recount the facts found by the motion judge,
    supplemented by uncontroverted testimony at the motion hearing.
    Commonwealth v. Cordero, 
    477 Mass. 237
    , 238 (2017).
    On January 25, 2013, Whitman police Detectives Joseph Bombardier
    and Eric Campbell were conducting surveillance of a three-unit
    apartment building out of which they suspected drug activity was
    3
    being conducted.1   At approximately 10:50 P.M. that evening, the
    detectives observed a vehicle park nearby, and its two occupants
    enter the building.   Those same two individuals reemerged a few
    minutes later, returned to the vehicle, and drove away without
    the vehicle's headlights on.   Bombardier instructed fellow
    Officer Gary Nelson to stop the vehicle for suspected drug
    activity.    Nelson did so a few minutes later, upon observing
    the vehicle traveling above the speed limit along a road in
    Whitman.2   Nelson radioed Bombardier that he had stopped the
    vehicle.
    When the detectives arrived, Nelson was standing at the
    vehicle's driver's side.   Bombardier likewise approached the
    driver, and in doing so he noticed a strong odor of marijuana
    emanating from inside the vehicle.   Bombardier asked the driver
    if she had any marijuana in the vehicle.3   She told him that she
    1
    Detective Joseph Bombardier had received complaints from
    one of the apartment's residents concerning heavy foot traffic
    going in and out of the building at all hours. Bombardier
    determined that another of the building's residents had
    previously been charged with drug-related offenses. He
    therefore decided to conduct surveillance of the building, and
    suspected, based on his training and experience, that drug
    activity was being conducted out of the building.
    2
    Officer Gary Nelson testified that he measured the vehicle
    traveling forty-two miles per hour in a thirty mile per hour
    zone. There is no testimony indicating that the vehicle's
    lights were still off at the time of the traffic stop.
    3
    This stop occurred after the decriminalization of
    marijuana possession under State law and this court's opinion in
    4
    did not think so, and said that he could check.     After
    instructing the driver to step out, Bombardier used his
    flashlight to search the interior of the driver's seat area.
    Finding nothing, he directed Campbell to ask the front seat
    passenger, the defendant, to leave the vehicle.     When the
    defendant stepped out, Campbell observed what he believed to be
    a firearm under the front passenger seat.4    The officers arrested
    the defendant and the driver, placed them in separate cruisers,
    and advised them of the Miranda rights.    Another officer later
    observed a plastic bag on the floor of the cruiser between the
    defendant's feet that appeared to contain "crack" cocaine.     The
    defendant was subsequently indicted for possession with the
    intent to distribute cocaine, as well as with firearm offenses
    and other offenses with enhanced penalties.
    Prior to trial, the defendant moved to suppress the
    evidence seized during the traffic stop.     The motion judge held
    an evidentiary hearing, and thereafter, he denied the
    defendant's motion.   In April, 2015, a jury convicted the
    defendant on the lesser included offense of cocaine possession,
    Commonwealth v. Cruz, 
    459 Mass. 459
    (2011), which held that, in
    light of the changed status of marijuana, "the odor of burnt
    marijuana alone no longer constitutes a specific fact suggesting
    criminality." Commonwealth v. Overmyer, 
    469 Mass. 16
    , 20
    (2014), citing Cruz, supra at 469-472.
    4
    The defendant does not challenge the officer's testimony
    that he saw a firearm.
    5
    and he was sentenced to one year in jail.   The defendant timely
    filed this appeal from the judgment of conviction, and on
    appeal, he challenges only the denial of his pretrial motion to
    suppress.
    Discussion.5   The defendant challenges the denial of his
    motion to suppress on three grounds.   First, he argues that the
    evidence against him should be suppressed as the product of a
    pretextual stop, where the Whitman officers stopped the vehicle
    the defendant occupied not because it was speeding, but because
    the police suspected that its occupants were involved in drug
    activity.   The defendant contends that all such pretextual
    stops, which generally are legitimated on the basis of an
    observed civil traffic violation yet motivated by a desire to
    investigate suspected criminal wrongdoing as to which the police
    lack reasonable suspicion or probable cause to justify an
    5
    We acknowledge the briefs submitted by the following amici
    curiae: Lawyers' Committee for Civil Rights and Economic
    Justice, Urban League of Eastern Massachusetts, Charles Hamilton
    Institute for Race and Justice, Massachusetts Law Reform
    Institute, Union of Minority Neighborhoods, Boston Police Camera
    Action Team, GLBTQ Legal Advocates & Defenders, MassEquality,
    The Network/La Red, Interact: Advocates for Intersex Youth,
    Theater Offensive, Greater Boston PFLAG, Centro Presente,
    Brazilian Worker Center, Justice at Work, Justice Resource
    Institute, Jewish Alliance for Law and Social Action,
    Massachusetts Associate of Hispanic Attorneys, and Massachusetts
    Black Lawyers Association; Committee for Public Counsel Services
    and Massachusetts Association of Criminal Defense Lawyers;
    American Civil Liberties Union of Massachusetts, Inc.; and the
    District Attorney for the Suffolk District.
    6
    investigatory stop, violate art. 14 and its protection against
    unreasonable seizures.6   On this point, the defendant asks that
    we overturn our decision in Santana, 
    420 Mass. 205
    , which holds
    that an observed traffic violation is itself a lawful basis for
    the police to conduct a traffic stop regardless of the officer's
    underlying motive.
    Second, the defendant argues that the police impermissibly
    expanded the scope of the stop when detectives Bombardier and
    Campbell approached the vehicle during Nelson's traffic inquiry
    and asked the driver about the smell of marijuana.    Last, the
    defendant challenges the motion judge's finding that the
    driver's consent to the search of the vehicle was freely and
    voluntarily given.
    We review these arguments in turn.    In doing so, "we adopt
    the motion judge's subsidiary findings of fact absent clear
    error, but we independently determine the correctness of the
    judge's application of constitutional principles to the facts as
    found."   Commonwealth v. Catanzaro, 
    441 Mass. 46
    , 50 (2004).
    1.   Pretext.   The parties dispute, as a threshold matter,
    whether the defendant adequately raised this issue before the
    motion judge.   We conclude that he did.   The first section of
    6
    The Commonwealth conceded that the Whitman police did not
    have reasonable suspicion of criminal activity justifying an
    investigatory stop. We do not address whether this was a
    necessary concession and focus exclusively on the asserted legal
    basis for the stop, an observed traffic violation.
    7
    the defendant's memorandum of law in support of his motion to
    suppress asserted that "[t]he car stop was effectuated so that
    the occupants could be identified and the car searched."    The
    motion judge's written opinion likewise acknowledged "[t]he
    defendant['s] argu[ment] that the stop for the traffic offense
    was a pretext."   The fact that the defendant did not
    specifically state that he challenged the continued viability of
    Santana does not preclude our review of this issue, given both
    its treatment below and the fact that the motion judge was bound
    to apply Santana regardless of the defendant's position.    See
    generally Commonwealth v. Vasquez, 
    456 Mass. 350
    , 357-358
    (2010).7
    Article 14, like the Fourth Amendment to the United States
    Constitution, guarantees "a right to be secure from all
    unreasonable searches[] and seizures."8   Because "[a] police stop
    of a moving automobile constitutes a seizure," Commonwealth v.
    7
    This is not to say that challenges to established law need
    not be raised during trial court proceedings in order for them
    to be entertained on appeal. Such arguments still must be
    raised below. See, e.g., Commonwealth v. Barnes, 
    399 Mass. 385
    ,
    393-394 (1987) (appellate court not obliged to consider grounds
    argued on appeal but not raised in motion to suppress).
    8
    Article 14 of the Massachusetts Declaration of Rights and
    the Fourth Amendment to the United States Constitution are
    distinct sources of this right to be free from arbitrary
    government action, and in some circumstances, "art. 14 provides
    more substantive protection to criminal defendants than does the
    Fourth Amendment in the determination of probable cause."
    Commonwealth v. Upton, 
    394 Mass. 363
    , 373 (1985).
    8
    Rodriguez, 
    472 Mass. 767
    , 773 (2015), that stop must be
    reasonable in order to be valid under the Fourth Amendment and
    art. 14.   A passenger in a vehicle may challenge the
    constitutionality of a stop.    See Commonwealth v. Quintos Q.,
    
    457 Mass. 107
    , 110 (2010), citing Brendlin v. California, 
    551 U.S. 249
    , 251 (2007).
    In 
    Santana, 420 Mass. at 209
    , we articulated the current
    State constitutional standard for evaluating the validity of a
    traffic stop.   Under that rule, called the authorization
    approach, a traffic stop is reasonable for art. 14 purposes "so
    long as the police are doing no more than they are legally
    permitted and objectively authorized to do," regardless of the
    underlying intent or motivations of the officers involved.
    
    Santana, supra
    , quoting United States v. Trigg, 
    878 F.2d 1037
    ,
    1041 (7th Cir. 1989), cert. denied sub nom. Cummins v. United
    States, 
    502 U.S. 962
    (1991).9   Stated differently, under the
    authorization test, a stop is reasonable under art. 14 as long
    as there is a legal justification for it.   We have long held
    that an observed traffic violation is one such justification.
    See, e.g., Commonwealth v. Bacon, 
    381 Mass. 642
    , 644 (1980)
    ("Where the police have observed a traffic violation, they are
    9
    One year after Santana, the United States Supreme Court
    decided Whren v. United States, 
    517 U.S. 806
    , 811-813 (1996), in
    which the Court adopted an identical test for evaluating the
    reasonableness of a traffic stop under the Fourth Amendment.
    9
    warranted in stopping a vehicle"); Commonwealth v. Amado, 
    474 Mass. 147
    , 151 (2016) (valid stop where "unlit registration
    plate"); Commonwealth v. Feyenord, 
    445 Mass. 72
    , 75 (2005),
    cert. denied, 
    546 U.S. 1187
    (2006) (valid stop where inoperable
    headlight in daylight); 
    Santana, 420 Mass. at 207
    (valid stop
    where defective taillight).   Cf. Commonwealth v. Lora, 
    451 Mass. 425
    , 436 (2008), quoting Whren v. United States, 
    517 U.S. 806
    ,
    810 (1996) ("the decision to stop an automobile is reasonable
    for Fourth Amendment purposes 'where the police have probable
    cause to believe that a traffic violation has occurred'").     As
    Santana makes clear, the authority to conduct a traffic stop
    where a traffic violation has occurred is not limited by "[t]he
    fact that the [police] may have believed that the [driver was]
    engaging in illegal drug 
    activity." 420 Mass. at 208
    .
    In the defendant's view, however, evaluating the
    reasonableness of a traffic stop on the basis of legal
    justification alone is not enough, because this creates the risk
    that the police might use an observed traffic violation as a
    pretext for investigating other suspected wrongdoing.10   In place
    10
    The defendant's general position against pretextual
    traffic stops mirrors that of the petitioners in 
    Whren, 517 U.S. at 810
    , which the Supreme Court succinctly summarized: "[The
    petitioners] argue . . . that 'in the unique context of civil
    traffic regulations' probable cause [to believe that a traffic
    violation has occurred] is not enough. Since, they contend, the
    use of automobiles is so heavily and minutely regulated that
    total compliance with traffic and safety rules is nearly
    10
    of the authorization test, the defendant seeks a new art. 14
    standard for traffic stops that looks beyond objective legal
    justification in order to examine the police's underlying
    motives for conducting the stop.   Specifically, the defendant
    asks that when considering a motion to suppress a judge should
    examine whether a given traffic stop was only a pretext for the
    police's underlying "true" motive to investigate suspected
    criminal conduct, as to which the police lacked the requisite
    reasonable suspicion or probable cause to justify a bona fide
    investigatory stop.   As the primary basis for this position, the
    defendant relies on a series of cases and academic articles
    discussing the connections between traffic stops and racial
    profiling.   He also argues that because Massachusetts courts
    have considered the issue of pretext when evaluating the
    reasonableness of inventory or administrative searches, so too
    should they consider pretext when analyzing the validity of
    traffic stops.   Before addressing these specific points, we
    examine the underpinnings of Santana's authorization test.
    Santana is predicated on the general constitutional
    principle, reflected in both art. 14 and Fourth Amendment
    jurisprudence, that "police conduct is to be judged 'under a
    impossible, a police officer will almost invariably be able to
    catch any given motorist in a technical violation. This creates
    the temptation to use traffic stops as a means of investigating
    other law violations, as to which no probable cause or even
    articulable suspicion exist."
    11
    standard of objective reasonableness without regard to the
    underlying intent or motivation of the officers involved.'"
    
    Santana, 420 Mass. at 208
    , quoting Commonwealth v. Ceria, 
    13 Mass. App. Ct. 230
    , 235 (1982).11    See 
    Lora, 451 Mass. at 436
    ,
    quoting 
    Whren, 517 U.S. at 813
    ("Subjective intentions play no
    role in ordinary, probable cause Fourth Amendment analysis");
    
    Ceria, supra
    , and cases cited.   Evaluating the validity of
    police conduct on the basis of objective facts and
    circumstances, without consideration of the subjective
    motivations underlying that conduct, is justified in part based
    on the significant evidentiary difficulties such an inquiry into
    police motives would often entail.    This would require that
    courts discern not only whether the police initially possessed
    some underlying motive that failed to align with the legal
    11
    We have applied this same standard of objective
    reasonableness when assessing, for instance, the validity of a
    Terry-type investigatory stop, Commonwealth v. Smigliano, 
    427 Mass. 490
    , 493 (1998) ("Because the facts and circumstances
    known to the officer are sufficient to create a reasonable
    suspicion . . . in a reasonable police officer, a Terry stop is
    justified regardless of the officer's subjective state of
    mind"); the reasonableness of a search conducted pursuant to the
    emergency aid exception, Commonwealth v. Tuschall, 
    476 Mass. 581
    , 584-585 (2017) (officers must possess "an objectively
    reasonable basis" for conclusion that intervention is necessary
    to save someone who is injured or in imminent danger); and the
    appropriate scope of a consent-based search, Commonwealth v.
    Gaynor, 
    443 Mass. 245
    , 255 (2005), quoting Florida v. Jimeno,
    
    500 U.S. 248
    , 251 (1991) (scope determined based on "objective
    reasonableness -- what would the typical reasonable person have
    understood by the exchange between the officer and the
    suspect?").
    12
    justification for their actions, but also whether the police
    were acting on that "improper" motive (i.e., the pretext), as
    opposed to the "proper" motive, when engaging in the challenged
    action.   Both judges and legal commentators have questioned the
    ability of courts -- venues of limited insight -- to reach
    accurate and satisfactory answers to these questions, which may
    be more appropriately handled by psychologists or philosophers
    than lawyers.   See, e.g., United States v. Arra, 
    630 F.2d 836
    ,
    845, n.12 (1st Cir. 1980) (one "problem" with this subjective
    approach is "the premium it would place on dissemblance," and
    that "it may be little more than guesswork for a court to
    determine what the true motivation was"); 1 W.R. LaFave, Search
    and Seizure § 1.4(e) (5th ed. 2012) (there is "no reason to
    believe that courts can with any degree of success determine in
    which instances the police had an ulterior motive," and
    "[p]resence of an ulterior motive may show why an officer might
    want to depart from the usual procedure but does not show that
    he has done so").
    The authorization test avoids this often-speculative
    probing of the police's "true" motives, while at the same time
    providing an administrable rule to be applied by both law
    enforcement in the field as well as reviewing courts.   Like its
    Federal counterpart, art. 14 must often "be applied on the spur
    (and in the heat) of the moment, and the object in implementing
    13
    its command of reasonableness is to draw standards sufficiently
    clear and simple to be applied with a fair prospect of surviving
    judicial second-guessing months and years after an arrest or
    search is made."    Atwater v. Lago Vista, 
    532 U.S. 318
    , 347
    (2001).    The bright-line standard of legal justification
    achieves this by clarifying exactly when the police may conduct
    a traffic stop:    where an officer has observed a traffic
    violation.   "If this were not so, [a traffic stop's] validity
    could not be settled until long after the event; it would depend
    not only on the psychology of the arresting officer but on the
    psychology of the judge."    United States v. McCambridge, 
    551 F.2d 865
    , 870 (1st Cir. 1977).12
    Moreover, this rule also ensures that the same
    constitutional protections under art. 14 are afforded to all
    Massachusetts drivers where the same factual circumstances are
    present.   As we observed in Santana, "the defendants' contention
    might yield the illogical result of allowing stops of nonsuspect
    drivers who violate motor vehicle laws, but forbidding stops of
    suspected criminals who violate motor vehicle laws."    Santana,
    12
    The United States Court of Appeals for the First Circuit
    also noted that a rule of reasonableness that hinges on the
    purity of law enforcement intentions may be all too easily
    manipulated: "As law enforcement personnel learn that a
    particular motivation is improper because it will render an
    otherwise valid search invalid, they may not have difficulty
    convincing themselves that their conduct was prompted not by the
    improper reason but the proper one." United States v. Arra, 
    630 F.2d 836
    , 845 n.12 (1st Cir. 1980).
    
    14 420 Mass. at 210
    n.3.     Application of the exclusionary rule in
    these circumstances, as the defendant requests, would be
    contrary to that rule's purpose, which is to "deter intentional
    unconstitutional behavior."     
    Lora, 451 Mass. at 439
    .   Its effect
    here would be to deter the police from carrying out one of their
    primary objectives:     investigating, within permissible legal
    boundaries, suspected criminal behavior.
    Beyond these legal and practical justifications, Santana's
    authorization test is grounded in sound policy.     We have noted
    that "allowing police to make [traffic] stops serves [the]
    significant government interest" of ensuring public safety on
    our roadways.   
    Rodriguez, 472 Mass. at 776
    .    As Rodriguez more
    fully explains:
    "[M]any of our traffic violation statutes regulate moving
    cars and relate directly to the promotion of public safety;
    even those laws that have to do with maintaining a
    vehicle's equipment in accordance with certain standards
    may also be safety-related. . . . Permitting stops based
    on reasonable suspicion or probable cause that these laws
    may have been violated gives police the ability to
    immediately address potential safety hazards on the road.
    Thus, although a vehicle stop does represent a significant
    intrusion into an individual's privacy, the government
    interest in allowing such stops for the purpose of
    promoting compliance with our automobile laws is clear and
    compelling" (citation omitted).
    
    Id. at 776-777.
      Therefore, the fact that a traffic law has been
    violated is, generally speaking, a legally sufficient basis to
    justify stopping a vehicle, irrespective of any additional
    suspicions held by the officer(s) conducting the stop.      See,
    15
    e.g., Commonwealth v. Cruz, 
    459 Mass. 459
    , 465 (2011) ("officers
    validly 'stopped' the car for parking in front of a fire
    hydrant, a civil traffic violation . . . .    Thus, the officers'
    presence at the side of the car was appropriate" [citations
    omitted]); 
    Santana, 420 Mass. at 210
    ("By driving an automobile
    with a broken taillight, the defendants took the risk of being
    stopped").   In that sense a traffic stop cannot be "arbitrary,"
    because it is predicated on a driver violating a traffic law.13
    Still, the defendant urges that we overturn Santana on the
    ground that the authorization test countenances pretextual stops
    -- and more specifically, stops motivated by the race of the
    driver (i.e., racial profiling).   In the defendant's view, this
    court's previous attempt to address the problem of racial bias
    in traffic stops, 
    Lora, 451 Mass. at 444-447
    , has failed to
    provide a meaningful remedy.   Lora held that where a driver
    produces "sufficient evidence to raise a reasonable inference,"
    
    id. at 442,
    that the stop at issue "is the product of the
    selective enforcement predicated on race," evidence seized in
    the course of that stop must be suppressed under the
    exclusionary rule.   
    Id. at 440.
      The surest way to effectively
    remedy that issue now, the defendant contends, is simply to do
    away with Santana's authorization test, and instead hold that
    13
    We have also recognized that "[a]n arrest or prosecution
    based on probable cause is ordinarily cloaked with a presumption
    of regularity." 
    Lora, 451 Mass. at 437
    .
    16
    all pretextual stops, regardless of the particular motive
    (whether it be the race of a driver, or, as here, a desire to
    investigate suspected criminal wrongdoing) violate art. 14.
    There are at least two deficiencies in this argument.
    First, to the extent the defendant appeals to our
    consideration of the motivations underlying a traffic stop in
    the racial profiling context as a basis for doing so in this and
    similar cases, he ignores any distinction between art. 14 and
    the equal protection principles of arts. 1 and 10 of the
    Massachusetts Declaration of Rights.   In Lora we observed that
    racial profiling "is at base a claim that [the police]
    selectively enforced the laws in contravention of the Fourteenth
    Amendment and arts. 1 and 10."   
    Lora, 451 Mass. at 436
    .     We
    permitted inquiry into officers' subjective motives in that case
    because Lora, unlike Santana or Whren, "involved a challenge to
    [a] traffic stop[] based on equal protection grounds."     
    Lora, supra
    .   At the same time, we observed that "'[s]ubjective
    intentions play no role in ordinary, probable cause Fourth
    Amendment analysis.'   Our holding in [Santana] is not to the
    contrary."   Id., quoting 
    Whren, 517 U.S. at 813
    .   See 
    Lora, supra
    , quoting 
    Whren, supra
    ("the constitutional basis for
    objecting to intentionally discriminatory application of laws is
    the Equal Protection Clause, not the Fourth Amendment").     Thus,
    Lora makes clear that to the extent we do consider the purpose
    17
    of a stop when assessing its validity, we do so pursuant to the
    equal protection principles of arts. 1 and 10 -- not art. 14's
    guarantee against unreasonable seizures -- and only where a
    driver has alleged that race was the reason for the stop.
    This brings us to the more obvious deficiency in the
    defendant's appeal to the racial profiling context:   the fact
    that racial profiling is not an issue in this case.    Unlike the
    Lora defendant, the defendant here has raised no allegation of
    impermissible discrimination, and he does not challenge the
    traffic stop on equal protection grounds.   To the contrary, he
    acknowledges in his brief that he is "is not arguing (and has
    never argued) that he was racially profiled"14 (emphasis added).
    Although we certainly do not dispute, as a general matter, the
    enormity or relevance of the problem of racial profiling, it is
    not an appropriate basis for overturning our general art. 14
    standard governing the reasonableness of traffic stops where the
    defendant has expressly disavowed any such argument that race
    was a factor in the stop at issue.
    At the same time, the defendant and the concurring Justice
    raise considerable, legitimate concerns regarding racial
    profiling and the impact of such practices on communities of
    color.    We share these sentiments, which echo those expressed by
    14
    The defendant is an African-American male; the driver is
    a Caucasian female.
    18
    past members of this court.    See, e.g., 
    Lora, 451 Mass. at 444
    ,
    and cases cited ("Justices of this court have expressed
    considerable concern about the practice of racial profiling in
    prior decisions").   We likewise acknowledge their valid
    questions regarding the lasting efficacy of Lora for addressing
    the issue of pretextual stops motivated by race, given that in
    the near-decade since that decision, we are not aware of a
    single reported case suppressing evidence under its framework.
    We take this opportunity to encourage lawyers to use the Lora
    framework in cases where there is reason to believe a traffic
    stop was the result of racial profiling.   To the extent we must
    review the adequacy of our decision in Lora, however, or address
    these issues in depth, we wait to do so in a case where a driver
    has actually alleged and laid a proper foundation for a claim
    under Lora.   We cannot evaluate the efficacy of the Lora
    framework without a record.
    As an alternative basis for his request that we overturn
    Santana, the defendant cites cases from "other areas of criminal
    law" where he contends Massachusetts courts "identify pretext" -
    - namely, searches conducted for the purposes of inventory or
    administrative regulation.    But the defendant's conclusion that
    "there is no good reason for the distinction" between the
    constitutional analysis in these cases versus traffic stops
    ignores at least one reason.    Inventory and administrative
    19
    searches -- as distinct from traffic stops, which involve only a
    temporary seizure, see 
    Rodriguez, 472 Mass. at 773
    -- are unique
    in that they are conducted in the absence of probable cause or
    reasonable suspicion, for purely noninvestigatory reasons.       See,
    e.g., Commonwealth v. Vuthy Seng, 
    436 Mass. 537
    , 550-555, cert.
    denied, 
    537 U.S. 942
    (2002).    In these contexts, the burden
    rests with the Commonwealth to demonstrate that the search "was
    conducted for some legitimate police purpose other than a search
    for evidence."   Commonwealth v. Benoit, 
    382 Mass. 210
    , 219
    (1981), S.C., 
    389 Mass. 411
    (1983).    From the start, then,
    consideration of an officer's "purpose" for conducting the
    search is relevant to an assessment of the lawfulness of the
    search itself.   Thus, where it appears that the "sole purpose"
    of that search was in fact criminal investigation, rather than
    inventory or administrative regulation, any evidence unlawfully
    seized must be suppressed.     See, e.g., Benoit, supra at 219
    ("The record clearly reveals that the only purpose for the entry
    into this suitcase . . . was to seize evidence.    The search and
    seizure without a warrant was, therefore, illegal");
    Commonwealth v. Ortiz, 
    88 Mass. App. Ct. 573
    , 576-577 (2015)
    (affirming suppression of evidence found in course of inventory
    search where officer testimony showed that "sole purpose of
    impounding and searching the defendant's vehicle and its
    contents" was to search "for evidence of drug activity without a
    20
    warrant").15   A traffic stop poses no such question regarding the
    actual legal authority for the police conduct at issue, because,
    as mentioned, "[w]here the police have observed a traffic
    violation, they are warranted in stopping a vehicle."   
    Bacon, 381 Mass. at 644
    .   Cf. 
    Whren, 517 U.S. at 811
    (declining to
    import principles of cases "addressing the validity of a search
    conducted in the absence of probable cause" to cases involving
    "police conduct that is justifiable on the basis of probable
    cause to believe that a violation of law has occurred").
    Having considered the defendant's arguments, we decline to
    disturb our general rule that the reasonableness of a traffic
    stop under art. 14 is evaluated according to the authorization
    test articulated in Santana.   Outside of the racial profiling
    context -- as this case is -- the reasonableness of a traffic
    15
    The defendant quotes extensively from Commonwealth v.
    Ortiz, 
    88 Mass. App. Ct. 573
    , 576-577 (2015), to argue that we
    should consider pretext here. In Ortiz, the defendant, who was
    the subject of surveillance as part of an investigation into
    cocaine trafficking, was stopped and arrested for switching
    lanes without signaling; a subsequent inventory search of his
    vehicle yielded cocaine. 
    Id. at 575.
    The arresting officer
    testified that he would not have conducted either the stop or
    the arrest absent the intention "to employ the inventory policy
    to search [a] backpack for drugs." 
    Id. at 576-577.
    The Appeals
    Court affirmed the trial judge's suppression of the evidence on
    the ground that the inventory search "was simply a pretext for
    using the inventory policy to conduct an investigatory search."
    
    Id. at 577.
    Significantly, however, the Appeals Court made no
    such determination regarding the validity of the initial stop;
    to the contrary, it correctly acknowledged that "the
    constitutional reasonableness of traffic stops 'does not depend
    on the actual motivations of the officer involved.'" 
    Id. at 575
    n.5, quoting 
    Whren, 517 U.S. at 813
    .
    21
    stop does not depend upon the particular motivations underlying
    the stop.     For the sound legal and practical reasons previously
    described, legal justification alone, such as an observed
    traffic violation, is sufficient.
    Applying that principle here, the motion judge credited
    Nelson's testimony that before conducting the traffic stop at
    issue, Nelson observed the vehicle traveling above the speed
    limit.     We therefore affirm the judge's conclusion that "the
    stop was warranted by the observed traffic violation."       "The
    fact that the [police] may have believed that the defendants
    were engaging in illegal drug activity does not limit their
    power to make an authorized stop."     
    Santana, 420 Mass. at 208
    .
    2.     Scope of the stop.   In addition to challenging the
    legality of the stop itself, the defendant argues that the
    Whitman police exceeded the permissible scope of the stop when
    the plainclothes detectives joined Nelson at the scene and asked
    the driver about the odor of marijuana emanating from the
    vehicle.    "In evaluating whether the police exceeded the
    permissible scope of a stop, the issue is one of proportion."
    Commonwealth v. Sinforoso, 
    434 Mass. 320
    , 323 (2001).     "The
    nature of the stop, i.e., for a traffic offense, defines the
    scope of the initial inquiry by a police officer."     Commonwealth
    v. Bartlett, 
    41 Mass. App. Ct. 468
    , 470 (1996).     See
    Commonwealth v. Cordero, 
    477 Mass. 237
    , 241 (2017) ("A routine
    22
    traffic stop may not last longer than reasonably necessary to
    effectuate the purpose of the stop" [quotations and citation
    omitted]).   "Where an officer conducts an uneventful threshold
    inquiry giving rise to no further suspicion of criminal
    activity, he may not prolong the detention or expand the
    inquiry."    
    Feyenord, 445 Mass. at 78
    n.5.
    As discussed, the stop at issue was justified based on
    Nelson's observation of the vehicle speeding.    This defines the
    permissible scope of the officers' inquiry.     The defendant fails
    to cite any authority suggesting that it was impermissible for
    the plainclothes detectives to join Nelson at the location of
    the stop.    The stop remained constitutional so long as the
    officers did not exceed its permissible scope.     There is nothing
    in the record to indicate that the "tasks tied to the traffic
    infraction . . . [were already] complete[]," Rodriguez v. United
    States, 
    135 S. Ct. 1609
    , 1614 (2015), by the time Bombardier and
    Campbell arrived, or that Nelson unnecessarily prolonged the
    stop to await the detectives' arrival.    See 
    Cordero, 477 Mass. at 242
    ("The police do not earn 'bonus time' to conduct
    additional investigations by an expeditious performance of the
    traffic-related investigation").    The motion judge found that
    the detectives arrived while "Nelson [was] standing at the
    driver's side of the vehicle."     Nelson testified that, after
    stopping the vehicle, he explained to the driver that he had
    23
    stopped her for speeding and requested her license and
    registration; she produced a registration certificate but was
    unable to produce a license.   Nelson recalled that he had been
    speaking with the driver for "[a]pproximately a minute," and had
    yet to confirm her name and date of birth, see 
    id. at 242
    (tasks
    during routine traffic stop reasonably include "confirmation of
    the identity of the driver"), when Bombardier and Campbell
    arrived and spoke to the driver about the smell of marijuana.
    At that point Nelson returned to his cruiser to confirm
    McGovern's information.   Contrast 
    id. at 247
    (continued
    detention of defendant unreasonable where "the investigation of
    the civil traffic violations" justifying stop "was complete").
    We also reject the defendant's argument that Bombardier's
    question to the driver about the smell of marijuana fell beyond
    the permissible scope of the stop.   That argument is foreclosed
    by this court's opinion in Commonwealth v. Cruz, 
    459 Mass. 459
    (2011).   Cruz was decided following the enactment of G. L.
    c. 94C, §§ 32L-32N, which "changed the status of the possession
    of one ounce or less of marijuana from a criminal to a civil
    offense."   
    Id. at 464.
      In Cruz, an officer who had conducted a
    valid traffic stop detected an odor of burnt marijuana as he
    approached the driver's side window; we held that the officer's
    "asking the driver whether he had been smoking marijuana" did
    not constitute an impermissible expansion of the scope of the
    24
    stop, "because the officers could potentially have issued the
    driver a civil citation pursuant to G. L. c. 40, § 21D."        
    Id. at 466.16
         The stop at issue here took place in January, 2013 --
    after the Cruz decision, while possession of marijuana remained
    a civil offense.17      As in Cruz, then, Bombardier did not exceed
    the scope of the stop when inquiring about the smell of
    marijuana emanating from the vehicle, given his authority to
    issue a civil citation.      "Once in the process of making a valid
    stop for a traffic violation," as here, "officers are not
    required to 'ignore what [they] see[], smell[] or hear[].'"
    
    Cruz, 459 Mass. at 466
    , quoting 
    Bartlett, 41 Mass. App. Ct. at 471
    .
    3.    Consent.   The defendant argues that the evidence should
    be suppressed because the driver did not voluntarily consent to
    the search of the vehicle.       See Commonwealth v. Podgurski, 
    386 Mass. 385
    , 390-392 (1982), cert. denied, 
    459 U.S. 1222
    (1983)
    (passenger may object to validity of vehicle search).       A
    warrantless search such as this is presumptively unreasonable
    under both the Fourth Amendment and art. 14 unless one of the
    16
    See G. L. c. 94C, § 32N (directing police departments to
    "enforce [G. L. c. 94C, § 32L,] in a manner consistent with the
    non-criminal disposition provisions of [G. L. c. 40, § 21D]").
    17
    Effective December, 2016, the Regulation and Taxation of
    Marijuana Act states, in pertinent part, that adults shall not
    be penalized or sanctioned "under the laws of the commonwealth
    in any manner" for possessing an ounce or less of marijuana.
    See G. L. c. 94H, § 7 (a) (1).
    25
    "few specifically established and well-delineated exceptions" to
    the warrant requirement apply.     Commonwealth v. Johnson, 
    461 Mass. 44
    , 48 (2011), quoting Coolidge v. New Hampshire, 
    403 U.S. 443
    , 455 (1971).   A search authorized by consent is one such
    exception.    See Commonwealth v. Buswell, 
    468 Mass. 92
    , 105
    (2014).   As with all warrantless searches, the Commonwealth
    bears the burden of proof that consent was "freely and
    voluntarily given," Commonwealth v. Krisco Corp., 
    421 Mass. 37
    ,
    46 (1995), quoting Bumper v. North Carolina, 
    391 U.S. 543
    , 548-
    549 (1968), meaning it was "unfettered by coercion, express or
    implied."    Commonwealth v. Harmond, 
    376 Mass. 557
    , 561 (1978)
    quoting Commonwealth v. Walker, 
    370 Mass. 548
    , 555, cert.
    denied, 
    429 U.S. 943
    (1976).     "Voluntariness of consent 'is a
    question of fact to be determined in the circumstances of each
    case.'"   
    Id., quoting Commonwealth
    v. Aguilar, 
    370 Mass. 490
    ,
    496 (1976).   As a question of fact, "it should not be reversed
    absent clear error by the judge."     Commonwealth v. Gray, 
    465 Mass. 330
    , 343, cert. denied, 
    134 S. Ct. 628
    (2013), citing
    Commonwealth v. Carr, 
    458 Mass. 295
    , 303 (2010).
    We discern no error here.     The motion judge, who "was in
    the best position to assess the weight and credibility of the
    testimony given at the [suppression] hearing," 
    Carr, supra
    ,
    concluded that the driver freely and voluntarily consented to
    the search of the vehicle.    This was based in part on the
    26
    judge's finding that when Bombardier "asked [the driver] if she
    had any marijuana in the car.    She told him she did not think so
    and said that he could check."    The fact that the driver
    affirmatively offered the search naturally supports the judge's
    conclusion that her consent was voluntary.     See Commonwealth v.
    Sanna, 
    424 Mass. 92
    , 97-99 (1997) (concluding that "the police
    had properly entered the defendant's home on the consent given
    by the father").    Further, the record lacks any evidence to
    suggest that the officers' conduct during the vehicle stop was
    at all coercive.    See Commonwealth v. Cantalupo, 
    380 Mass. 173
    ,
    177-178 (1980).    Contrast 
    Carr, 458 Mass. at 302-303
    (consent
    not voluntary where armed officers "completely blocked the only
    exit" from premises, officer who sought permission to search
    "signaled his distrust of the defendants," and request to search
    "sounded more like an order").    Finally, that the police did not
    inform the driver of her right to refuse does not, as the
    defendant argues, invalidate her consent.    "The fact that a
    person is not informed by the police that he has a right to
    refuse to consent to an entry or search is a factor to be
    considered on the issue of voluntariness, but is not
    determinative of the issue."     
    Sanna, 424 Mass. at 97
    n.10.
    Given the absence of record evidence to the contrary, we
    conclude that the motion judge did not err in finding that the
    27
    driver freely and voluntarily consented to the search of the
    vehicle.
    Conclusion.    For the foregoing reasons, we affirm the
    denial of the defendant's motion to suppress the evidence
    against him.   We also affirm the judgment of conviction of
    unlawful possession of a controlled substance.
    So ordered.
    BUDD, J. (concurring). I join the opinion of the court
    because I agree that it is unworkable to strike down the
    authorization rule articulated in Commonwealth v. Santana, 
    420 Mass. 205
    (1995).   However, I write separately because, although
    -- as the court points out -- the driver here was not stopped
    for "driving while black," it is important to highlight how
    pretextual stops disproportionately affect people of color, and
    to explore what can be done to mitigate the harm caused by this
    practice.
    Years of data bear out what many have long known from
    experience:   police stop drivers of color disproportionately
    more often than Caucasian drivers for insignificant violations
    (or provide no reason at all).   In 2017, the Stanford Open
    Policing Project found that police stopped African-American
    drivers more than Caucasian drivers, controlling for population
    makeup, both nationally and in Massachusetts.1   Stanford Open
    Policing, Stop Rates, 2017, https://openpolicing.stanford.edu
    /findings/ [https://perma.cc/F6HT-87WE].   See United States
    Department of Justice, Office of Justice Programs, Bureau of
    Justice Statistics, Special Report, Police Behavior During
    1
    I note that although most of the data focuses on people of
    color, other marginalized communities, i.e., groups of people
    who have historically experienced some form of oppression or
    exclusion, are also the target of heightened police attention.
    Transgendered people, for example, have reported facing
    disproportionate harm by encounters with law enforcement.
    Activists Say Police Abuse of Transgender People Persists
    Despite Reforms, New York Times, Sept. 6, 2015.
    2
    Traffic and Street Stops, 2011, at 3 (rev. October 27, 2016),
    https://www.bjs.gov/content/pub/pdf/pbtss11.pdf
    [https://perma.cc/2ML3-UWY9].
    In effectuating traffic stops, most officers act in good
    faith.   Even where they do, to a Caucasian driver a traffic stop
    may be annoying or embarrassing, but for a driver of color, such
    a stop can be humiliating and painful.2   Commonwealth v.
    Feyenord, 
    445 Mass. 72
    , 88 (2005), cert. denied, 
    546 U.S. 1187
    (2006) (Greaney, J., concurring).   Further, recent tragic events
    have shown that the fear people of color have of being stopped
    by police is justified:   African-Americans have been killed
    during routine traffic stops.3
    2
    In Commonwealth v. Warren, 
    475 Mass. 530
    , 540 (2016), when
    we discussed the related problem of racial profiling in Terry-
    type stops, we noted "the recurring indignity of being racially
    profiled."
    3
    The following are a few recent examples that have gained
    national attention. A police officer in Minnesota stopped
    Philando Castile for a broken taillight. During the encounter,
    the officer shot him four times, killing him in front of his
    fiancée and four year old daughter. Woman Streams Aftermath of
    Fatal Officer-Involved Shooting, Cable News Network, July 8,
    2016, http://www.cnn.com/2016/07/07/us/falcon-heights-shooting-
    minnesota/index.html [https://perma.cc/4P5A-YY28]. In Ohio, the
    police stopped Samuel DuBose for failing to display a front
    license plate, and fatally shot him during the stop. The
    Shooting of Samuel DuBose, New York Times, July 29, 2015. The
    South Carolina police stopped Walter Scott for a broken
    taillight, and shot him to death as he fled. Carbado, From
    Stopping Black People to Killing Black People: the Fourth
    Amendment Pathways to Police Violence, 
    105 Cal. L
    . Rev. 125, 149
    (2017). In Texas, a police officer stopped Sandra Bland for
    failing to signal a lane change. 
    Id. at 150.
    She was found
    dead in jail three days later. 
    Id. 3 It
    goes without saying that this is not a new phenomenon.
    Almost twenty years ago, then-Associate Justice Ireland noted
    statistics from multiple jurisdictions showing that African-
    American and sometimes Hispanic drivers were stopped more often
    than Caucasian drivers, even though Caucasian drivers were the
    majority group.   Commonwealth v. Gonsalves, 
    429 Mass. 658
    , 670
    (1999) (Ireland, J., concurring).
    The reasons for pretextual stops of people of color stem
    from explicit bias (i.e., racial profiling), unconscious bias,4
    or a combination of both.   See Carbado, From Stopping Black
    Massachusetts is not immune from traffic stop violence.
    Wakeelah Cocroft, an African-American woman, was a passenger in
    a vehicle that the police stopped for speeding in Worcester.
    Cocroft v. Smith, 
    95 F. Supp. 3d 119
    , 123 (D. Mass. 2015).
    During the stop, an officer "forcefully threw Cocroft to the
    ground and scraped her face against the cement." 
    Id. In a
    subsequent civil suit, a jury found that the officer had
    unlawfully seized Cocroft. 
    Id. at 122.
    It is also important to note that these examples are not
    meant to diminish the fact that police officers are at risk
    during traffic stops as well. Auburn police officer Ronald
    Tarentino, for example, was shot to death during a traffic stop.
    Obituary for Fallen Police Officer Ronald Tarentino, Jr., Boston
    Herald, May 24, 2016, http://www.bostonherald.com/news/local_
    coverage/herald_bulldog/2016/05/obituary_for_fallen_police_
    officer_ronald_tarentino_jr [https://perma.cc/8GNT-KQRU].
    4
    Unconscious or implicit bias is a discriminatory belief or
    association likely unknown to its holder. Multiple studies
    confirm the existence of implicit bias, and that implicit bias
    predicts real-world behavior. See Kang & Banaji, Fair Measures:
    A Behavioral Realist Revision of "Affirmative Action," 
    94 Cal. L
    . Rev. 1063, 1071-1073 (2006). That is, even people who do not
    believe themselves to harbor implicit bias may in fact act in
    ways that disfavor people of color.
    4
    People to Killing Black People:    The Fourth Amendment Pathways
    to Police Violence, 
    105 Cal. L
    . Rev. 125, 129-130 (2017);
    Harris, The Stories, the Statistics, and the Law:    Why "Driving
    While Black" Matters, 
    84 Minn. L
    . Rev. 265, 291-292 (1999);
    Ramirez, Hoopes, & Quinlan, Defining Racial Profiling in a Post-
    September 11 World, 40 Am. Crim. L. Rev. 1195, 1197-1198 (2003).
    See also Greenwald & Krieger, Implicit Bias:    Scientific
    Foundations, 
    94 Cal. L
    . Rev. 945, 951 (2006); Lawrence, The Id,
    the Ego, and Equal Protection:    Reckoning with Unconscious
    Racism, 39 Stan. L. Rev. 317, 343 (1987).    Regardless of the
    cause, it is a persistent, pervasive problem that must be
    addressed.
    The solution, however, is not clear cut.    For the reasons
    outlined by the court, the answer is not to overrule the
    authorization rule articulated in 
    Santana, 420 Mass. at 208
    -209.
    As the court has explained, inquiring into subjective police
    intent for traffic stops would lead to several practical
    difficulties, not least among them the question of how precisely
    to determine intent.   Ante at     .
    In Commonwealth v. Lora, 
    451 Mass. 425
    (2008), the court
    reiterated that although "law enforcement officers enjoy
    considerable discretion in exercising some selectivity for
    purposes consistent with the public interest," that
    "selectivity" cannot be based on "an unjustifiable standard such
    5
    as race, religion or other arbitrary classification"5 (quotations
    and citations omitted).   
    Id. at 436-437.
      The court concluded
    that to rebut the presumption that a stop was not undertaken as
    a result of an arbitrary classification, a defendant must
    present "credible evidence establishing a reasonable inference
    of impermissible discrimination."   
    Id. at 443.
      The court
    further held that
    "[a]t a minimum, that evidence must establish that the
    racial composition of motorists stopped for motor vehicle
    violations varied significantly from the racial composition
    of the population of motorists making use of the relevant
    roadways, and who therefore could have encountered the
    officer or officers whose actions have been called into
    question."
    
    Id. at 442.
    Thus, the court attempted to provide a means of combatting
    pretextual stops based on race with statistics.   We noted that a
    similar approach had been somewhat successful in New Jersey.
    
    Id. at 440-441,
    citing State v. Soto, 
    324 N.J. Super. 66
    (1996).
    As it happened, traffic stop statistics also were being
    collected in the Commonwealth.   Before Lora was decided, the
    Legislature had passed An Act providing for the collection of
    data relative to traffic stops (act), St. 2000, c. 228.
    Pursuant to the act, Northeastern University analyzed a year's
    worth of data collected on racial and gender profiling, and
    5
    As the court points out, the defendant did not bring a
    claim under the equal protection provisions of the Massachusetts
    Constitution, another fatal blow to mounting a challenge to
    pretextual stops. Ante at     .
    6
    issued a report in 2004.     
    Lora, 451 Mass. at 448
    .   Despite the
    Legislature's focus on data collection in this act, the court
    acknowledged that the defendant's evidentiary burden was
    "daunting."    
    Id. at 445.
    In a concurring opinion, then-Justice Ireland pointed out
    some of the difficulties involved in collecting the necessary
    data, even with the act in place.     
    Id. at 449
    (Ireland, J.,
    concurring).    For example, although the act required law
    enforcement agencies that had racially profiled to continue to
    gather statistics, it did not contain provisions requiring those
    agencies to report the data to anyone or to analyze the data,
    severely undercutting any use that data might have had.       
    Id. (Ireland, J.
    , concurring).     Moreover, almost one-half of the
    targeted agencies failed to follow the reporting guidelines of
    the act, for example by failing to track certain factors or
    failing to report at all.    
    Id. (Ireland, J.
    , concurring).
    Justice Ireland's concerns were prescient:     the act
    required governmental data collection for only a limited amount
    of time, and the Legislature has not renewed the necessary
    funding.   See St. 2000, c. 228, § 8 (assigning financial
    responsibility to State agencies); 
    id. at §
    10 (requiring data
    to be transmitted for analysis after one year).    Statistics on
    traffic stops, thus, are now even more difficult to come by.        We
    are not aware of any traffic stop cases in which a defendant has
    7
    been able to gather and use statistics to prove that the stop
    violated equal protection principles; it appears that Lora has
    not provided the opportunity for defendants that we had hoped it
    would.
    Concerns about bias in pretextual traffic stops are well
    founded, as are concerns about the practical ability of
    defendants to show racial bias by way of statistics as suggested
    by Lora.   Because this is not a "driving while black" equal
    protection case, the issue is not squarely before us.     However,
    it is worth noting that it has been seventeen years since the
    Legislature required State agencies to collect data on racial
    profiling.   We are not aware of the data ever being used to
    mount a challenge under Lora, and it is now woefully outdated.
    The time has come for the Legislature to address the problem
    once more.   Publicly available data would not only assist
    litigants, but would also inform the public about this ongoing
    problem.
    In the meantime, our recent holding in Commonwealth v.
    Cordero, 
    477 Mass. 237
    (2017), has added to our jurisprudence.
    There we held that a traffic stop may go no further than
    investigating the alleged traffic violation unless that
    investigation leads to information to support reasonable
    suspicion of a crime.   
    Id. at 247.
      See Commonwealth v. Amado,
    
    474 Mass. 147
    , 151 (2016); 
    Gonsalves, 429 Mass. at 663
    ;
    8
    Commonwealth v. Torres, 
    424 Mass. 153
    , 158-159 (1997).   These
    cases are by no means a cure for racial profiling in traffic
    stops, but they may provide a means to lessen their impact on
    drivers and diminish the incentive to conduct pretextual stops.