Commonwealth v. Robinson-Van Rader ( 2023 )


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    SJC-13329
    COMMONWEALTH   vs.   MICHAEL ROBINSON-VAN RADER.
    Suffolk.       January 6, 2023. - May 15, 2023.
    Present:    Budd, C.J., Gaziano, Lowy, Cypher, Kafker, Wendlandt,
    & Georges, JJ.
    Firearms. Threshold Police Inquiry. Constitutional Law, Search
    and seizure, Reasonable suspicion, Equal protection of
    laws. Search and Seizure, Threshold police inquiry,
    Reasonable suspicion. Practice, Criminal, Motion to
    suppress.
    Indictments found and returned in the Superior Court
    Department on August 28, 2018.
    A pretrial motion to suppress evidence was heard by Peter
    B. Krupp, J., and a conditional plea was accepted by Mary K.
    Ames, J.
    The Supreme Judicial Court on its own initiative
    transferred the case from the Appeals Court.
    John P. Warren for the defendant.
    Kathryn Sherman, Assistant District Attorney (Michelle
    Slade, Assistant District Attorney, also present) for the
    Commonwealth.
    Chauncey B. Wood, Kevin S. Prussia, Timothy A. Cook, Asma
    S. Jaber, & Douglas J. Plume, for Massachusetts Association of
    Criminal Defense Lawyers, amicus curiae, submitted a brief.
    2
    Katharine Naples-Mitchell, Audrey Murillo, & Radha
    Natarajan, for Criminal Justice Institute at Harvard Law School
    & another, amici curiae, submitted a brief.
    GAZIANO, J.   In the early evening of April 23, 2018, Boston
    police officers received reports of gunfire in a neighborhood
    near their headquarters.   Approximately seven minutes later,
    three officers patrolling in an unmarked vehicle encountered two
    young Black men, the defendant and J.H. (a juvenile), walking
    away from the location where shots had been fired.   The two were
    less than a mile from police headquarters and matched a bare-
    bones description of the shooters.   The officers stopped and
    frisked the defendant and J.H. and discovered that each
    possessed a concealed handgun.   The defendant subsequently was
    indicted on charges of discharging a firearm within 500 feet of
    a building, unlawful possession of a firearm, and related
    offenses.
    The defendant filed a motion to suppress the evidence
    seized from his person, on the ground that the stop was in
    violation of the Fourth Amendment to the United States
    Constitution and art. 14 of the Massachusetts Declaration of
    Rights because the officers lacked reasonable suspicion to
    believe that he had committed a crime.   The defendant also
    argued that the stop and frisk was unconstitutional because it
    violated his Federal and State rights to equal protection of the
    3
    law.   In support of his argument on equal protection, the
    defendant submitted statistical evidence that two of the police
    officers involved, who were assigned to the Boston police
    department's youth violence strike force, were more likely to
    stop Black members of the community than individuals of other
    races.
    A Superior Court judge denied the defendant's motion
    because he concluded that the officers had had reasonable
    suspicion to stop the defendant to investigate his involvement
    in the shooting, and reasonable suspicion that he was armed and
    dangerous to support the patfrisk for a weapon.    In addressing
    the defendant's equal protection challenge, the judge presumed
    that this court's revised standard for establishing an equal
    protection claim under the Massachusetts Declaration of Rights,
    which was adopted in the context of a traffic stop, see
    Commonwealth v. Long, 
    485 Mass. 711
    , 724-725 (2020), applied as
    well to a challenge of a pedestrian stop asserted to be racially
    motivated.   The judge reasoned that, "just as a racially
    motivated motor vehicle stop would be constitutionally
    problematic, a racially motivated stop of a pedestrian would
    also offend the constitutional right to equal protection."
    Notwithstanding the statistical evidence presented by the
    defendant, the judge then determined that the Commonwealth had
    satisfied its burden of establishing that the officers had had a
    4
    race-neutral reason for conducting a threshold inquiry, and also
    for pat frisking the defendant for a weapon.
    We conclude that the stop did not violate the defendant's
    rights under the Fourth Amendment or art. 14, because the
    officers had had a reasonable articulable suspicion that the
    defendant had been involved in the shooting.       We emphasize that
    the equal protection clause provides an independent basis upon
    which a defendant may rely in pursuing claims of intentional
    discriminatory application of the law, separate and distinct
    from the right to be free from unreasonable searches and
    seizures.    We agree with the judge that the new standard we
    adopted in Long, 485 Mass. at 724-725, to provide a defendant a
    more accessible path to pursuing an equal protection claim in
    the context of a motor vehicle stop, is applicable not only to
    traffic stops, but also to other police investigations such as
    pedestrian stops.     We also agree with the judge that, in this
    case, at the hearing on the defendant's motion to suppress, the
    Commonwealth demonstrated an adequate, race-neutral reason for
    the stop, sufficient to rebut the defendant's statistical
    evidence of discriminatory policing.       Accordingly, we affirm the
    denial of the defendant's motion to suppress.
    1.      Background.   a.   Facts.   The facts are derived from the
    facts found by the motion judge, supplemented with undisputed
    evidence from the record that is not contrary to the judge's
    5
    rulings.   See Commonwealth v. Jones-Pannell, 
    472 Mass. 429
    , 431
    (2015).
    On April 23, 2018, at 7:29 P.M., Boston police received
    reports and ShotSpotter acoustic alerts of gunfire at a
    basketball court near Annunciation Road, an area located not far
    from Boston police headquarters.   Within a minute of the first
    report, police received two 911 calls detailing the incident.
    The first caller, "Manny," reported that "[t]here was a bunch of
    shots just fired," "about . . . eight or so," near a particular
    address on Annunciation Road.   The second caller, "Marie,"
    called from a location a few blocks away from Annunciation Road,
    adjacent to the Southwest Corridor Park.    She reported having
    heard "about six" gunshots, and described seeing two Black males
    wearing black "hoodies" (sweatshirts with hoods) riding "off on
    their bikes."   She also reported that the two males on bicycles
    left the area by riding along Prentiss Street, and then turned
    right (southbound) onto Tremont Street.    About fifteen seconds
    after placing the call, Marie was reporting to the 911 operator
    that she could still see the two males on bicycles, when she
    said, "I can see the cop coming now."     In an audio recording of
    the call introduced at the hearing on the defendant's motion to
    suppress, police sirens are audible in the background of the
    call.
    6
    Following this call, the police dispatcher broadcast a
    description of the suspects.    The first broadcast stated, "I do
    have a description of two males that were seen on bikes take off
    on Tremont from Prentiss."     Subsequent broadcasts detailed
    multiple witness's reports that the two males on bicycles were
    the shooters, and that they were wearing "black hoodies."
    Although the dispatcher had information from one of the 911
    callers that the two males were Black, she did not broadcast the
    reported race of the suspects over the police radio.     The judge
    found the police response to have been "swift and coordinated."
    As the investigation was developing, Officer James
    O'Loughlin, Jr., was working a paid detail on New Heath Street,
    slightly more than one-half mile south of the intersection of
    Prentiss and Tremont Streets.     O'Loughlin had been monitoring
    his police radio when he heard the report of shots fired, and
    the description of the suspects as two males on bicycles wearing
    black shirts or sweatshirts.    From where O'Loughlin was standing
    on New Heath Street, he had an "obstructed, distant view of the
    [Southwest Corridor Park] bike path," which was elevated and ran
    perpendicular to his line of sight.     Trees, fencing, and signage
    partially obstructed the view from his position 300 feet away
    from the bicycle path.
    O'Loughlin saw two Black males on bicycles, wearing black
    shirts or sweatshirts, pedaling southward toward Heath Street,
    7
    and reported as much to the police dispatcher.   He told the
    dispatcher, "You got two Black males coming down Tremont Street
    right now" toward Heath Street, and he described their
    appearance as one man wearing "a black vest and a Black male in
    a black jacket."   O'Loughlin also reported that the pair
    appeared to be pedaling slowly; he assumed that they were tired.
    When the police dispatcher first broadcast the information
    about the incident, three other officers, in an unmarked sport
    utility vehicle (SUV), were approximately one and one-half to
    two miles away from the scene of the shooting.   Officer Korey
    Franklin was driving the SUV in the vicinity of Blue Hill Avenue
    and Columbia Road; Officer Gregory Eunis was in the front
    passenger's seat and Officer Reivilo Degrave was in the rear
    seat on the passenger's side.   The three officers, all members
    of the youth violence strike force, were in plain clothes, but
    were wearing tactical vests that had "Boston Police" printed on
    the fronts and backs.1
    Upon hearing the dispatch, Franklin drove quickly in the
    direction of the reported shooting.   After further details about
    the incident were broadcast, the officers stopped at the
    location where O'Loughlin had been speaking to the dispatcher,
    1 The officers described the youth violence strike force as
    a city-wide unit tasked with monitoring neighborhood "hot spots"
    that are "plagued" by gun-related violence.
    8
    and they talked with him.    O'Loughlin told them that two Black
    males on bicycles, wearing black hoodies, were slowly pedaling
    toward Heath Street.   Based on O'Loughlin's report, Franklin
    drove north along Columbus Avenue, which parallels the bike
    path, to search for the suspects.    At that point, the three
    officers had heard the dispatcher's description of two males on
    bicycles in black hoodies, and O'Loughlin's observations that
    two Black males wearing black hoodies were riding bicycles and
    heading south toward Heath Street.    The officers had no
    information about the suspects' age, height, weight, build, hair
    style, or facial features.
    When they reached the area of the Southwest Corridor Park,
    the officers observed two young Black males wearing black
    hoodies walking south on Columbus Avenue on the southbound side
    of the road.   Few other people were outside in the area that
    evening, and the males were the only two individuals wearing
    hoodies whom police saw in that location.2
    The officers drove past the two young men and noticed that
    each kept continuously looking back over his shoulder toward
    Boston police headquarters, although nobody appeared to be
    following them.   Franklin turned the SUV around at Cedar Street,
    2 The defendant challenges the judge's finding that "[t]here
    were not a lot of people out that evening" as not supported by
    the record and therefore clearly erroneous. We conclude that it
    was not clearly erroneous. See note 4, infra.
    9
    and headed south on Columbus Avenue, so that he ended up
    trailing the two pedestrians.    Near the corner of Columbus
    Avenue and Heath Street, he pulled up adjacent to the two young
    men, who were on the passenger's side of the SUV.    After
    Franklin stopped the vehicle, Eunis and Degrave got out and
    approached the two men, who later were identified as the
    defendant and J.H.   The young men did not change their pace as
    the officers approached.    Degrave said, "Hold up a second," and
    the two complied.    Degrave spoke with J.H., while Eunis
    approached the defendant.   The officers did not observe any
    indications of hidden firearms, such as noticeably weighted
    pockets or suspicious bulges.
    When Degrave asked J.H. whether he had "anything on him,"
    J.H. turned sideways in "kind of like a jerk reaction -- like as
    a reflex."   This resulted in J.H.'s right hip being shielded
    from the officer.    Degrave then pat frisked J.H. and found a
    firearm in his waistband.   As Degrave was conducting the pat
    frisk, Eunis had been observing the defendant, who was sweating
    and continuously looking over his shoulder toward Boston police
    headquarters.   Throughout the encounter, the defendant kept his
    right hand in his sweatshirt pocket but, unlike J.H., did not
    make any effort to turn or to shield his body.    After Degrave
    found the firearm on J.H.'s person, Eunis "grabbed [the]
    defendant, pulled him to the ground, secured his arms, and put
    10
    him in handcuffs."   A subsequent patfrisk of the defendant
    revealed a firearm in his pants pocket.   The defendant and J.H.
    were arrested between 7:35 and 7:36 P.M., approximately seven
    minutes after the report of shots fired near Annunciation Road.
    The location where they were stopped is approximately eight-
    tenths of a mile from Boston police headquarters.
    Mary Fowler, a professor of mathematics at Worcester State
    University, testified in support of the defendant's argument
    that the investigatory stop violated his rights to equal
    protection.3   Fowler conducted a statistical analysis of the
    traffic stops Eunis and Degrave had made, which included
    information about the racial distribution of individuals in the
    3 The defendant moved, pursuant to Mass. R. Crim. P.
    14 (a) (2), as appearing in 
    442 Mass. 1518
     (2004), for discovery
    of statistical data necessary to analyze potential patterns of
    racial profiling by the arresting officers. In support of this
    request, the defendant cited studies indicating that Black men
    in the city of Boston were more likely to be targeted for police
    investigation than individuals of other races. See Commonwealth
    v. Warren, 
    475 Mass. 530
    , 539 (2016). In addition, counsel
    cited an Associated Press report that "at least 71% of all
    street level civilian-police encounters involved minorities
    while minorities make up about 25% of the Boston population,"
    and stated that, in his experience, officers assigned to the
    youth violence strike force "consistently stop, search and
    arrest Black and Brown people at higher rates" than the
    department-wide statistics. A judge ordered the Commonwealth to
    "make available all [field interrogation and observation (FIO)]
    and arrest reports submitted by Officers Reivilo Degrave and
    Gregory Eunis" for a two-year period preceding the incident.
    Fowler utilized this data to "determine if the likelihood of an
    individual being recorded in an FIO [conducted by Eunis or
    Degrave] is related to race."
    11
    set of field interrogation and observation (FIO) reports
    submitted by Eunis and Degrave from January 5, 2017, through
    August 31, 2018.   An estimated fifty-one percent of residents in
    the officers' patrol area were Black.    Among the 276 individuals
    who had been subjects of the officers' discretionary stops
    during that period, 248, or ninety percent, were Black, and
    five, or two percent, were "white, non-Hispanic."
    Fowler compared those figures to data from the United
    States Census Bureau for the locations of each of the FIOs the
    officers had reported.   The census data contained the racial
    distribution of the residents living within the officers' patrol
    area at the time of the stops at issue, which acted as a
    benchmark.   Within the twenty-month period, Fowler testified,
    Black individuals were more than five times as likely to be
    stopped as other individuals.   Fowler conducted a statistical
    analysis called an "equality of proportions" test, which
    indicated that the difference between the frequency of non-Black
    individuals stopped and the frequency of Black individuals
    stopped was statistically significant.    Fowler explained that
    the frequency of randomly observing differences that extreme was
    less than one in 100,000.   Accordingly, she concluded that the
    stops were consistent with racial profiling.
    b.   Prior proceedings.   A grand jury returned indictments
    charging the defendant with unlawful possession of a firearm,
    12
    G. L. c. 269, § 10 (a); carrying a loaded firearm, G. L. c. 269,
    § 10 (n); unlawful possession of ammunition, G. L. c. 269,
    § 10 (h); and discharging a firearm within 500 feet of a
    building, G. L. c. 269, § 12E.     The defendant filed a motion to
    suppress the contraband found on his person on the ground that
    the officers lacked reasonable suspicion at the time of the stop
    that he had committed a crime and was armed and dangerous.       The
    motion also argued that the stop violated the defendants' rights
    to equal protection.    After a three-day hearing, and additional
    briefing, the motion to suppress was denied.     The defendant then
    entered a conditional guilty plea, conditioned on reserving his
    right to appeal from the denial of his motion to suppress.       See
    Mass. R. Crim. P. 12 (b) (6), as appearing in 
    482 Mass. 1501
    (2019).   He filed a timely notice of appeal, and we transferred
    the case to this court on our own motion.
    2.    Discussion.   a.   Reasonable suspicion.   "To justify a
    police investigatory stop under the Fourth Amendment or art. 14,
    the police must have 'reasonable suspicion' that the person has
    committed, is committing, or is about to commit a crime."
    Commonwealth v. Costa, 
    448 Mass. 510
    , 514 (2007), citing
    Commonwealth v. Lyons, 
    409 Mass. 16
    , 18-19 (1990).     Reasonable
    suspicion "must be based on specific and articulable facts and
    reasonable inferences therefrom, in light of the officer's
    experience" (citation omitted).     Commonwealth v. Gomes, 453
    
    13 Mass. 506
    , 511 (2009).    See Terry v. Ohio, 
    392 U.S. 1
    , 21
    (1968).   The calculus of reasonable suspicion examines "the
    totality of the facts on which the seizure is based."
    Commonwealth v. Meneus, 
    476 Mass. 231
    , 235 (2017).     See
    Commonwealth v. Henley, 
    488 Mass. 95
    , 103 (2021) (determining
    whether factors, "when viewed as a whole," gave rise to
    reasonable suspicion).    Reasonable suspicion must be more than a
    hunch.    Lyons, 
    supra at 19
    .
    In this case, we must determine whether the officers had
    reasonable suspicion when Eunis and Degrave, wearing Boston
    police tactical vests, got out of their unmarked SUV, approached
    the two young men, and told them to "[h]old up a second."      See
    Commonwealth v. Evelyn, 
    485 Mass. 691
    , 699 (2020) ("the naiveté,
    immaturity, and vulnerability of a child will imbue the
    objective communications of a police officer with greater
    coercive power"); Commonwealth v. Matta, 
    483 Mass. 357
    , 362
    (2019) (seizure occurs when officer "objectively communicate[s]
    that the officer would use . . . police power to coerce [a
    suspect] to stay").    When reviewing the disposition of a motion
    to suppress, we accept the motion judge's subsidiary findings
    absent clear error, and "make an independent determination
    whether the judge properly applied constitutional principles to
    the facts as found."     Commonwealth v. Lyles, 
    453 Mass. 811
    , 814
    (2009).
    14
    The defendant argues that the officers had only a generic
    description of the suspects as Black males wearing black
    hoodies, which left virtually nothing to distinguish the
    suspects from others in the area.   When they were stopped, the
    defendant and J.H. were on foot, and were not riding bicycles as
    the suspects were reported to have done.   In addition, the stop
    took place "nearly one mile away" from the location where the
    shots were reported, and the context of the stop, in a busy
    residential and retail area, early in the evening, made it less
    reasonable to conclude that the defendant and J.H. were more
    likely to be the shooters than anyone else in the area.
    The Commonwealth maintains that there was reasonable
    suspicion for the stop because of the defendant's and J.H.'s
    temporal and geographic proximity to the scene of the shooting,
    the similarity between the description of the two shooters and
    the appearance of the defendant and J.H., their nervous and
    evasive behavior, and the ongoing safety concern related to
    multiple shots being fired in a populated area.
    i.   Physical description.   The fact that an individual
    matches a broad, general description does not alone amount to
    reasonable suspicion, particularly if that description could fit
    many people in the area where the stop takes place.   See
    Commonwealth v. Warren, 
    475 Mass. 530
    , 535 (2016) (description
    of suspects as three Black males wearing dark clothing, one
    15
    wearing red hoodie, without any description of their facial
    features, hairstyles, height, weight, or other physical
    characteristics, was insufficient to support reasonable
    suspicion that Black male in general area wearing dark clothing
    was involved); Commonwealth v. Cheek, 
    413 Mass. 492
    , 496 (1992)
    ("the description of the suspect as a '[B]lack male with a black
    3/4 length goose' [jacket] could have fit a large number of men
    who reside in the Grove Hall section of Roxbury"); Commonwealth
    v. Doocey, 
    56 Mass. App. Ct. 550
    , 554, 557 (2002) (general
    description that fails to distinguish suspect from others cannot
    alone support reasonable suspicion).   Nonetheless, use of a
    general description is not an insurmountable obstacle to a
    finding of reasonable suspicion.   "[T]he value of a vague or
    general description in the reasonable suspicion analysis may be
    enhanced if other factors known to the police make it reasonable
    to surmise that the suspect was involved in the crime under
    investigation."   Meneus, 
    476 Mass. at 237
    .
    Prior to the stop of the defendant and J.H., the officers
    knew only that they were searching for two Black male suspects,
    who were wearing black hooded sweatshirts, and were riding
    bicycles in a particular direction.    No information had been
    communicated about the suspects' facial features, hairstyles,
    skin tone, height, weight, or other physical characteristics
    that could have contributed to the officers' ability to
    16
    distinguish the suspects from everyone else in the area.    See
    Warren, 
    475 Mass. at 535
    .   Moreover, at the time of the stop,
    the defendant and J.H. were walking, and not riding bicycles as
    the suspects were reported to have done.   Thus, the description
    of the suspects, standing alone, was too general to give rise to
    reasonable suspicion to stop the defendant.    Indeed, the judge
    recognized the description as being "generic."    See 
    id.
     at 535-
    536 ("With only this vague description, it was simply not
    possible for the police reasonably and rationally to target the
    defendant or any other black male wearing dark clothing as a
    suspect in the crime").
    The inquiry, however, does not end there.     The judge also
    properly considered whether other pieces of information allowed
    the officers to narrow the range of suspects from a generic
    description fitting many members of the community to particular
    individuals.   See Meneus, 
    476 Mass. at 237
    .   See, e.g.,
    Commonwealth v. Depina, 
    456 Mass. 238
    , 246-247 (2010) (general
    description that was insufficiently detailed and particularized
    to provide police reason to stop any person matching that
    description was bolstered by "accompanying circumstances");
    Commonwealth v. Mercado, 
    422 Mass. 367
    , 371 (1996) (general
    description combined with other relevant factors may provide
    adequate narrowing of description such that police have
    reasonable suspicion).
    17
    Thus, we turn to consider whether the bare-bones
    description of the suspects as Black men wearing black hoodies
    was enhanced by other factors relevant to a determination of
    reasonable suspicion.
    ii.   Nervous or evasive behavior.   The judge noted that the
    defendant and J.H. were exhibiting nervous behavior when the
    officers saw them walking approximately one mile from the scene
    of the shooting.   The officers testified, and the judge found,
    that the two young men "repeatedly look[ed] back 'over their
    shoulders' toward Boston [p]olice [h]eadquarters, although no
    one was following them."   The judge determined that this nervous
    behavior was an additional factor that could be considered in
    the calculus as to whether the officers had reasonable suspicion
    at the time of the stop.
    The defendant argues that the judge's finding of
    nervousness "added little, if anything, to the suspicion
    equation."   The officers would have been limited only to
    speculating that "the teenagers' head movements were related to
    the shots-fired incident, which took place nearly one mile
    away."
    In Commonwealth v. Karen K., 
    491 Mass. 165
    , 179 (2023), we
    considered whether evidence that a juvenile was "repeated[ly]
    looking over her shoulder and . . . attempt[ing] to avoid police
    officers" was properly factored into the analysis of reasonable
    18
    suspicion.   We observed that, although "nervous or furtive
    movements do not supply reasonable suspicion when considered in
    isolation," taken together with other factors, they may be
    considered as supporting reasonable suspicion.     Id. at 179,
    quoting Commonwealth v. DePeiza, 
    449 Mass. 367
    , 372 (2007).      See
    Commonwealth v. Barros, 
    425 Mass. 572
    , 584 (1997) (reasonable
    suspicion was supported by observation of three men "walking
    rapidly away from the crime scene while glancing over their
    shoulders").
    At the same time, caution must be exercised in considering
    nervous or evasive behavior in the calculus of reasonable
    suspicion.   "[I]n some instances, the fact that members of
    certain groups -- such as Black males in Boston -- have been
    disproportionately and repeatedly targeted for police encounters
    suggests a reason" for flight or evasive conduct unrelated to
    any possible consciousness of guilt (quotations and alterations
    omitted).    Karen K., 491 Mass. at 179-180.   See Evelyn, 485
    Mass. at 708-709 (nervousness and evasive behavior must be
    considered in context of unwillingness to engage in conversation
    with police); Warren, 
    475 Mass. at 540
     (flight of Black man from
    Boston police officers, based on reports of racial profiling,
    was "not necessarily probative of . . . consciousness of
    guilt"); Commonwealth v. Martin, 
    457 Mass. 14
    , 21 (2010) (in
    19
    light of his young age, defendant's nervousness around police
    officer added little to determination of reasonable suspicion).
    There was no error in the judge's decision to consider the
    defendant's act of repeatedly glancing over his shoulder toward
    Boston police headquarters in the analysis of reasonable
    suspicion.   See Barros, 
    425 Mass. at 584
    .      Notably, the concerns
    expressed in Karen K., 491 Mass. at 179-180; Evelyn, 485 Mass.
    at 708-709; Warren, 
    475 Mass. at 540
    ; and Martin, 
    457 Mass. at 21
    , are not present here.    The officers were driving an
    unmarked vehicle, and there was no evidence that the defendant
    and J.H. were aware that the car that drove past them in the
    opposite direction was a police vehicle.     In particular, the
    judge found that the defendant and J.H. were nervously glancing
    over their shoulders "before they were aware of . . . Franklin's
    unmarked vehicle."    Thus, the officers' approach cannot be
    considered the source of the defendant's nervousness.
    iii.     Geographic and temporal factors.    The judge also
    relied on the defendant's geographic and temporal proximity to
    the location of the shooting to bolster his view of the
    officers' ability to distinguish the defendant and J.H. from
    other Black men wearing black hooded sweatshirts.      The judge
    determined that the "[d]efendant and J.H. were moving in the
    direction of flight from the scene where shots were fired and
    were observed there only a few minutes after the shots were
    20
    reported.   As in Evelyn[, 485 Mass. at 708-709,] and Depina[,
    
    456 Mass. at 246-247
    ,] [the] defendant's location and direction
    of travel were consistent with the expected location and
    direction of travel of the suspects at that time."
    The defendant contends that his proximity to the location
    of the crime, minutes after the reports of shots fired, did not
    support a finding of reasonable suspicion.   Relying on Warren,
    
    475 Mass. at 536-537
    , he argues that the officers had limited
    information concerning the direction of the suspects' flight.
    In the defendant's view, the officers, "could only guess where
    the suspects went . . . .   On bicycles, within minutes, the
    suspects could have been in any number of neighborhoods in the
    dense city of Boston."   See Meneus, 
    476 Mass. at 233-234, 240
    (no reasonable suspicion despite report that young men ran into
    courtyard of housing complex).   The defendant notes that, while
    he was stopped only minutes after the shooting, the distance of
    one mile from the scene, on a spring evening where Degrave
    testified that "a lot of people" were "walking around," but
    according to Eunis, no one "stood out," did not support a
    finding of reasonable suspicion.4
    4 As stated, see note 2, supra, the defendant challenges the
    judge's finding that "[t]here were not a lot of people out that
    evening" as clearly erroneous. A finding is clearly erroneous
    "only if the reviewing court has a firm conviction that a
    mistake has been committed" (citation and quotation omitted).
    Commonwealth v. Bresnahan, 
    462 Mass. 761
    , 775 (2012). Eunis
    21
    The presence of a suspect in geographic and temporal
    proximity to the scene of the crime under investigation
    appropriately may be considered as a factor in the calculus of
    reasonable suspicion.   See, e.g., Henley, 488 Mass. at 103
    (officers had reasonable suspicion where defendant was stopped
    two blocks away from, and five minutes after, shooting); Evelyn,
    485 Mass. at 704-705 (defendant being stopped thirteen minutes
    after shooting, one-half mile away from scene, weighed in favor
    of reasonable suspicion); Depina, 
    456 Mass. at 246
     (defendant
    being within three blocks of crime scene ten minutes after
    shooting added to calculus of reasonable suspicion).   "Proximity
    is accorded greater probative value in the reasonable suspicion
    calculus when the distance is short and the timing is close."
    Warren, 
    475 Mass. at 536
    .
    In Warren, 
    475 Mass. at 536-537
    , the defendant was stopped
    one mile from the scene of the crime, approximately twenty-five
    to thirty minutes after a breaking and entering had taken place.
    testified that he did not see any other pedestrians that stood
    out to him that night, that he did not remember seeing other
    individuals, and that the defendant and J.H. "were the only two
    people I seen walking in that area." The judge apparently
    credited this testimony, rather than Degrave's testimony that
    "[i]t's a very commonly-traveled area. Some people were on
    foot. A lot of people were just walking around . . . ." The
    fact that Eunis's testimony was contradicted by his partner's
    testimony does not render the judge's finding clearly erroneous.
    "A judge may accept or reject, in whole or part, the testimony
    offered on a motion to suppress." Commonwealth v. Harvey, 
    390 Mass. 203
    , 206 n.4 (1983).
    22
    We determined that the broad time frame, combined with
    speculative evidence concerning the path of flight, could have
    placed the suspect anywhere in multiple neighborhoods within a
    two-mile radius of the crime scene.   Id. at 536-537.     The
    location and timing of that stop, therefore, were "no more than
    random occurrences . . . where the direction of the
    perpetrator's path of flight was mere conjecture."    Id. at 536.
    Here, by contrast, the defendant and J.H. were stopped
    seven minutes after the initial report of shots having been
    fired, approximately one mile from the scene of the shooting.
    The location of the stop was not a "random occurrence."
    Multiple reports by witnesses and police officers followed the
    path of the suspects as they traveled from near the scene on
    Annunciation Road to Columbus Avenue near the Southwest Corridor
    Park.   The first person who called 911 told the emergency
    operator that multiple shots had been fired on Annunciation
    Road.   The second caller provided another relevant location when
    she said that, from her position at a corner near the Southwest
    Corridor Park, a few blocks away from Annunciation Road, she saw
    two men wearing black hoodies riding bicycles, and heading south
    on Tremont Street in the direction of Heath Street.     Within one
    minute, O'Loughlin saw two men, wearing dark hoodies, riding
    bicycles on the Southwest Corridor bike path, heading south
    toward Heath Street.   A short time after speaking with
    23
    O'Loughlin, Degrave and Eunis spotted the defendant and J.H. on
    foot at the corner of Columbus Avenue and Heath Street, walking
    south.
    Accordingly, here, unlike in Warren, 
    475 Mass. at 536-537
    ,
    the judge properly considered the defendant's geographic and
    temporal location relative to the scene of the crime under
    investigation as factors in his calculus of reasonable
    suspicion.
    iv.   Nature of the crime.    The judge observed that "the
    officers were looking for suspects in a shooting that had
    occurred nearby, a very short time before."    The shooting took
    place in a dense residential and commercial area, near a
    university and a train station.   The judge concluded that the
    "gravity of this crime and the fact that the shooters were at
    large further supports the officers' stop."
    The seriousness of the offense, and the danger presented to
    the community, are factors that properly may be considered in
    assessing whether police had reasonable suspicion at the time of
    a stop.   Depina, 
    456 Mass. at 247
    .   See, e.g., Henley, 488 Mass.
    at 104 ("we consider that the circumstances of this crime, a
    shooting that left one victim dead, presented ongoing risk to
    public safety"); Evelyn, 485 Mass. at 705 ("circumstances
    indicated a potential ongoing risk to public safety, and
    therefore weighed in favor of reasonable suspicion"); Meneus,
    24
    
    476 Mass. at 239
     ("fact that the crime under investigation was a
    shooting, with implications for public safety, was relevant but
    not dispositive in determining the reasonableness of the stop");
    Commonwealth v. Lopes, 
    455 Mass. 147
    , 157-159 (2009) (in
    evaluating reasonable suspicion to justify stop, court
    considered report that van had been involved in homicide).
    Given the facts found by the judge, we conclude that the
    officers had reasonable suspicion to stop the defendant to
    investigate the shooting.     As in other cases discussed supra,
    reasonable suspicion in this case was "based on a convergence of
    supporting factors," including the defendant's nervous or
    evasive behavior, his geographic and temporal proximity to the
    area of the shooting, the location of a likely flight path, and
    the ongoing threat to public safety.    See Henley, 488 Mass.
    at 105.   While the description of the two suspects was, as the
    judge described it, "generic" and, standing alone, was
    insufficient to provide reasonable suspicion for an
    investigatory stop, the additional factors narrowed the search
    for suspects such that the officers did have reasonable
    suspicion when they stopped the defendant.    Accordingly, the
    stop did not violate the defendant's right to be free from
    unreasonable searches and seizures.
    b.    Equal protection.   In addition to his argument that he
    had been subject to an unreasonable search and seizure, the
    25
    defendant moved to suppress the evidence seized as a result of
    the stop on the ground of equal protection.     He argued that the
    officers violated his right to be protected from selective
    enforcement of the laws, and urged the judge, in analyzing this
    contention, to apply the less-stringent equal protection
    standard set forth in Long, 485 Mass. at 723-725, rather than
    the traditional three-part test elucidated in Commonwealth v.
    Franklin, 
    376 Mass. 885
    , 894-895 (1978).     Under the Long
    standard, the defendant argued, "once the low bar of a
    reasonable inference of discriminatory motive has been
    established -- a burden of production -- the burden of proof of
    non-discrimination shifts to the Commonwealth."     See Long, supra
    at 735.    The defendant maintained that the Commonwealth had
    failed to rebut the inference of discriminatory motive, which
    was supported by Fowler's statistical evidence.
    The Commonwealth argued that the Long standard is limited
    to traffic stops, and therefore is inapplicable to a pedestrian
    stop.     In the Commonwealth's view, a selective enforcement claim
    arising out of a pedestrian stop requires evaluation under the
    more rigorous, three-part test set forth in Franklin, 
    376 Mass. at 894
    .    In any event, the Commonwealth maintained, whatever the
    applicable standard, it had presented an adequate, race-neutral
    justification for the stop.
    26
    The judge agreed with the defendant that the Long standard
    applies with equal force to pedestrian stops as to traffic
    stops.    He reasoned, "just as a racially motivated motor vehicle
    stop would be constitutionally problematic, a racially motivated
    stop of a pedestrian would also offend the constitutional right
    to equal protection."    Under the Long standard, the judge
    explained, "[o]nce a defendant raises a reasonable inference
    that a stop was racially motivated, the burden shifts to the
    Commonwealth 'to provide a race-neutral explanation for such a
    stop.'"   See Commonwealth v. Lora, 
    451 Mass. 425
    , 426 (2008).
    See also Long, 485 Mass. at 723-725.    The judge then concluded
    that he "need not address the question of a threshold showing
    because the officers had a race-neutral motivation for stopping
    the defendant."
    In reviewing the judge's decision, we first must determine
    whether the judge erred in applying the Long standard to a
    challenge to a pedestrian stop.    We then must decide whether
    there was error in the judge's conclusion that the Commonwealth
    met its burden of rebutting an inference of selective
    enforcement by articulating an adequate, race-neutral reason for
    the stop.
    i.    Selective enforcement and selective prosecution.    Equal
    protection jurisprudence encompasses two broad categories of
    rights, which protect people against selective prosecution and
    27
    selective enforcement.      Selective prosecution refers to the
    decision to charge a person with a crime based upon
    impermissible criteria such as race, national origin, or gender,
    resulting in a greater number of convictions of persons who
    share that characteristic compared to similarly situated persons
    who do not.      See Commonwealth v. Bernardo B., 
    453 Mass. 158
    ,
    167-169 (2009).      Selective enforcement refers to law enforcement
    practices that unjustifiably target an individual for
    investigation based on the individual's race or other protected
    class.       See Lora, 
    451 Mass. at 436-437
    .   These categories are
    often confused, and the terms used interchangeably.        See United
    States v. Washington, 
    869 F.3d 193
    , 214 (3d Cir. 2017), cert.
    denied, 
    138 S. Ct. 713 (2018)
    .       In this case, we refer to claims
    of discriminatory police investigative practices as selective
    enforcement.
    ii.    Burden of proof.   Prior to our decision in Long, 485
    Mass. at 724-725, all equal protection challenges under arts. 1
    and 10 of the Massachusetts Declaration of Rights required
    review under a tripartite burden.       See Lora, 
    451 Mass. at
    437-
    438.    See also United States v. Armstrong, 
    517 U.S. 456
    , 465
    (1996) ("ordinary" equal protection claim brought under
    Fourteenth Amendment to United States Constitution requires
    proof of discriminatory effect, motivated by discriminatory
    purpose, and that similarly situated individuals were not
    28
    prosecuted); Washington, 
    869 F.3d at 214
     (substantive claims of
    selective prosecution and selective enforcement are evaluated
    under same test).   Under this standard, the defendant bears the
    initial burden of demonstrating selective enforcement by
    presenting some evidence that raises at least a reasonable
    inference of impermissible discrimination.    This must include
    evidence that a broader class of persons than those prosecuted
    or investigated has violated the law.   See Lora, 
    supra at 437
    .
    Second, the defendant must establish that failure to enforce the
    law was either consistent or deliberate.     
    Id.
       Third, the
    evidence must show that the decision not to enforce or prosecute
    was based on membership in a protected class, such as race.       
    Id.
    If a defendant is able to raise a reasonable inference of
    selective enforcement by presenting credible evidence that,
    deliberately or consistently, similarly situated individuals who
    are not members of the protected class have not been prosecuted,
    the Commonwealth must rebut that inference of discrimination.
    
    Id. at 438
    .   The remedy for a selective enforcement violation is
    suppression of the evidence that was obtained in violation of
    the defendant's constitutional right to equal protection.       
    Id. at 439
    .
    In Long, 485 Mass. at 723-725, we revised the standard by
    which a defendant can establish a claim of selective
    enforcement, in the context of the traffic laws.      In deciding
    29
    that such a change was necessary, we explained, "it is clear
    that Lora has placed too great an evidentiary burden on
    defendants.   The right of drivers to be free from racial
    profiling will remain illusory unless and until it is supported
    by a workable remedy."   Id. at 721.
    Under the revised standard, it is the defendant's burden to
    demonstrate that the decision to make the traffic stop was
    motivated by race or another constitutionally protected class.
    A defendant may do so by producing "evidence upon which a
    reasonable person could rely to infer that the officer
    discriminated on the basis of the defendant's race or membership
    in another protected class."   Id. at 723-724.   The defendant
    must point to specific facts that support such an inference,
    which are known to the defendant based on "personal knowledge,
    the defendant's own investigation, evidence obtained during
    discovery, and other relevant sources."   Id. at 724.    A bald
    allegation of selective enforcement, based only on membership in
    a constitutionally protected class, would not suffice.      See id.
    at 723.   If the defendant does raise an inference of
    discrimination, the burden shifts to the Commonwealth to rebut
    the inference by establishing a race-neutral reason for the
    stop.
    Our decision in Long, 485 Mass. at 721-723, noted
    explicitly that we had revised the standard by which to
    30
    establish an equal protection claim involving allegations of
    discriminatory traffic stops, given the difficulties defendants
    had experienced in establishing claims for selective enforcement
    based on race under the Lora framework.   See Long, supra, and
    cases cited.   We did not address whether this standard was to
    extend to all claims of selective enforcement, a question we had
    no need to reach.   The issue having been squarely raised here,
    we conclude that the equal protection standard established in
    Long for traffic stops applies equally to pedestrian stops and
    threshold inquiries, as well as other selective enforcement
    claims challenging police investigatory practices.
    In Long, 485 Mass. at 722, we determined that the first two
    parts of the three-part Franklin standard are not necessary in
    the context of motor vehicle stops.   We explained that,
    "because of the ubiquity of traffic violations, only a tiny
    percentage of these violations ultimately result in motor
    vehicle stops, warnings, or citations. Thus, it is
    virtually always the case that a broader class of persons
    violated the law than those against whom the law was
    enforced. Similarly, in stopping one vehicle but not
    another, an officer necessarily has made a deliberate
    choice." (Quotation and citation omitted.)
    Id.   Accordingly, the appropriate inquiry is restricted to
    whether the traffic stop was motivated by the driver's race or
    membership in another protected class.    Id. at 723.
    For similar reasons, the three-part Franklin standard is
    equally ill-suited to other claims of discriminatory law
    31
    enforcement practices.    There is no reason to anticipate, for
    example, that a defendant challenging a threshold inquiry on the
    sidewalk in front of a public housing complex would be better
    able to prove a negative -- that similarly situated suspects of
    other races were not investigated.    See Washington, 
    869 F.3d at 216
     (revising Federal discovery standard in selective
    enforcement cases because "there are likely to be no records of
    similarly situated individuals who were not arrested or
    investigated").   "Asking a defendant claiming selective
    enforcement to prove who could have been targeted by an
    informant, but was not, or who the [investigating agency] could
    have investigated, but did not, is asking [the defendant] to
    prove a negative; there is simply no statistical record for a
    defendant to point to."   United States v. Sellers, 
    906 F.3d 848
    ,
    853 (9th Cir. 2018).
    The inaccessibility or unavailability of relevant data in
    such situations stands in contrast to cases of selective
    prosecution, which occur "when, from among the pool of people
    referred by police, a prosecutor pursues similar cases
    differently based on race" or another protected class.     See
    Conley v. United States, 
    5 F.4th 781
    , 789 (7th Cir. 2021).       In
    Bernardo B., 
    453 Mass. at 173
    , for example, we considered a
    selective prosecution claim arising from a district attorney's
    practice of declining to bring statutory rape charges against
    32
    female complainants, "where the facts described by the girls
    could be viewed as contravening those same laws by them."     See
    Franklin, 
    376 Mass. at 896-897
     (selective prosecution claim
    alleging that white residents of housing project were not
    arrested for violent crimes, and that "police, prosecutors, and
    court officials assigned to work in that area insulated whites
    from being punished for their participation in those
    incidents").5
    Moreover, a claim of selective prosecution implicates the
    discretionary authority of the executive branch to enforce the
    criminal laws.   See Commonwealth v. Ehiabhi, 
    478 Mass. 154
    , 160
    (2017) ("the decision to prosecute is particularly ill-suited to
    judicial review" [citation and quotation omitted]); Bernardo B.,
    
    453 Mass. at 161
     (judicial review of decisions to prosecute
    "must proceed circumspectly lest we intrude on a function
    constitutionally vouchsafed to another branch of government").
    The presumption of regularity, a deference doctrine, limits
    judicial scrutiny of certain executive branch decisions.    See
    Armstrong, 
    517 U.S. at 464
    ; Bernardo B., 
    453 Mass. at 161
    ; The
    5 We note that the decision to conduct a pedestrian stop, or
    to investigate a suspect, is a "deliberate choice," thus
    satisfying the requirement under the second part of the three-
    part Franklin test, see Franklin, 
    376 Mass. at 894
    , that a
    defendant show that the failure to prosecute was deliberate.
    33
    Presumption of Regularity in Judicial Review of the Executive
    Branch, 
    131 Harv. L. Rev. 2431
    , 2432 (2018).
    In Massachusetts, the presumption of regularity encompasses
    charging decisions by both police officers and prosecutors.      See
    Lora, 
    451 Mass. at 437
    .    "An arrest or prosecution based on
    probable cause . . . ordinarily [is] cloaked with a presumption
    of regularity.   Because we presume that criminal prosecutions
    are undertaken in good faith, without intent to discriminate,
    the defendant bears the initial burden of demonstrating
    selective enforcement" (citation and quotation omitted).     
    Id.
    See Franklin, 
    376 Mass. at 894
     ("prosecutors and other law
    enforcement officers enjoy considerable discretion in exercising
    some selectivity for purposes consistent with the public
    interest . . . [b]ecause we presume that criminal prosecutions
    are undertaken in good faith, without intent to discriminate");
    Commonwealth v. King, 
    374 Mass. 5
    , 22 (1977) ("we presume that
    criminal arrests and prosecutions are undertaken in good faith,
    without intent to discriminate").
    The presumption of regularity, however, applies to
    decisions by prosecutors and police officers to charge an
    individual with a crime; it does not apply to street-level
    police investigations.    See Conley, 5 F.4th at 791 (presumption
    of regularity did not shield police "sting" operation from
    scrutiny because doctrine "is driven by separation of powers
    34
    concerns, which increase as courts venture closer to core
    executive activity").    While decisions by police officers
    "certainly reflect law enforcement priorities, judicial inquiry
    into their motives is routine."     Id.   See Sellers, 906 F.3d at
    853 (Federal agents "are not protected by a powerful privilege
    or covered by a presumption of constitutional behavior"
    [citation omitted]).    "Unlike prosecutors, agents [of the Bureau
    of Alcohol, Tobacco, Firearms and Explosives, and of the Federal
    Bureau of Investigation] regularly testify in criminal cases,
    and their credibility may be relentlessly attacked by defense
    counsel.   They also may have to testify in pretrial proceedings,
    such as motions to suppress evidence, and again their honesty is
    open to challenge."     United States v. Davis, 
    793 F.3d 712
    , 720-
    721 (7th Cir. 2015) (en banc).
    iii.   Application.     As discussed supra, a defendant raising
    a claim of selective enforcement based on alleged discriminatory
    policing practices bears the initial burden of establishing a
    reasonable inference that the investigation was motivated by
    race or membership in another constitutionally protected class.
    See Long, 485 Mass. at 724.    The defendant must point to
    "specific facts" about the police investigation that support
    such an inference.    Id.   If the defendant succeeds in doing so,
    the burden shifts to the Commonwealth to rebut the inference of
    discrimination.   Id.
    35
    In examining a claim of selective enforcement, a reviewing
    judge must consider the totality of the circumstances
    surrounding the claim.   See Long, 485 Mass. at 724-725.    In the
    context of police investigations such as pedestrian stops, the
    totality of the circumstances may include patterns of
    enforcement actions by the particular officer; the events
    preceding the investigation, i.e., the reasons the officer
    decided to target the defendant; the seriousness of the crime
    being investigated; and whether the defendant's race or
    ethnicity, or membership in another protected class, was part of
    a description of the suspect.   See, e.g., State v. Nyema, 
    249 N.J. 509
    , 530 (2021), quoting New Jersey Attorney General,
    Directive Establishing an Official Statewide Policy Defining and
    Prohibiting the Practice of "Racially-Influenced Policing" (June
    28, 2005) (directive prohibiting racially influenced policing
    allowed officers to take into account "a person's race or
    ethnicity when race or ethnicity is used to describe physical
    characteristics that identify a particular individual . . .
    being sought by a law enforcement agency in furtherance of a
    specific investigation or prosecution").   See also Brown v.
    Oneonta, 
    221 F.3d 329
    , 338-339 (2nd Cir. 2000), cert. denied,
    
    534 U.S. 816
     (2001) (where police possess description of suspect
    consisting primarily of race and gender, they are permitted to
    act on basis of that description, absent evidence of racial
    36
    animus); United States v. Avery, 
    137 F.3d 343
    , 354 n.5 (6th Cir.
    1997) (use of race as descriptive factor is not prohibited under
    equal protection clause, provided that police do not engage in
    dragnet tactics).
    A decision by the Supreme Court of New Jersey is
    illustrative of a case where the court considered a defendant's
    selective enforcement claim arising out of an allegedly racially
    motivated threshold inquiry.     See State v. Maryland, 
    167 N.J. 471
     (2001).   In that case, undercover police officers confronted
    two young Black men, who were arriving at a train station along
    with numerous other rush-hour commuters.     
    Id. at 477, 485
    .   The
    officers approached and asked to speak to the men.     A struggle
    ensued when the defendant turned his body and reached into his
    waistband, and several bags of marijuana fell to the ground.
    
    Id. at 478
    .   In reviewing the defendant's claim for selective
    enforcement, the court concluded that there had been no
    violation of a Federal or State right to be free from
    unreasonable searches and seizures, because the officers were
    entitled to approach and ask questions "without grounds for
    suspicion" (citation omitted).     
    Id. at 483
    .
    Nonetheless, the court went on to consider whether the
    decision to target the defendant for investigation constituted
    selective enforcement in violation of the defendant's right to
    equal protection of the laws.     
    Id. at 485-486
    .   The court
    37
    observed that the equal protection clause of the Fourteenth
    Amendment "requires that the selection of a person for a field
    inquiry . . . may not be based solely on that person's race
    absent some compelling justification that pre-existed the police
    approaching the individual."     
    Id. at 485
    .   The court then
    determined that the officers' hunch that the defendant had
    possessed narcotics was based, at least in part, on "racial
    stereotyping."    
    Id. at 486
    .   The undercover officers were
    patrolling the train station to prevent vandalism and graffiti.
    They were not conducting a narcotics investigation, and the
    officers had no reason to suspect that drugs were being carried
    through the train station.      Nor had they observed anything to
    suggest that the defendant was involved in a drug deal.      
    Id. at 488
    .   Accordingly, the court concluded that the government
    had "failed to overcome the inference . . . that this was a
    proscribed race-based field inquiry."      
    Id. at 489
    .
    Here, by contrast, we discern no error in the judge's
    conclusion that the Commonwealth rebutted an inference of
    selective enforcement raised by the statistical evidence.       The
    Commonwealth demonstrated that the police officers had a race-
    neutral reason to have conducted a pedestrian stop of the
    defendant and J.H., the suspects in the case of reported shots
    fired.    The second 911 caller introduced the suspects' race to
    the investigation when she reported that she heard multiple
    38
    gunshots and then saw two Black men on bicycles wearing black
    hoodies.   Within minutes of the 911 call, O'Loughlin told the
    responding officers that he had seen two Black males, on
    bicycles, wearing black hooded sweatshirts, heading towards
    Heath Street.   In short order, the officers located the
    suspects, who were walking in a direction "consistent in time
    and direction with two individuals fleeing from a shooting on
    bicycles."
    The defendant contends that, in denying his motion to
    suppress on the ground of equal protection, the judge conflated
    the requirements of art. 14 and the equal protection analysis.
    The defendant argues that the "equal protection question was not
    answered by the motion judge's art. 14 determination that the
    officers had reasonable suspicion to conduct the stop -- that
    analysis is simply inapposite to rebutting the defendant's prima
    facie statistical case, apples and oranges."   According to the
    defendant, "Long's plain language dictates that the Commonwealth
    cannot ignore or sidestep a defendant's statistical case," and
    therefore the judge "erroneously absolved the Commonwealth of
    its equal protection rebuttal burden."
    We emphasize that the Federal and State constitutional
    guarantees of equal protection of the laws provide residents of
    the Commonwealth a degree of protection separate and distinct
    from the prohibition against unreasonable searches and searches
    39
    under the Fourth Amendment and art. 14.      See Whren v. United
    States, 
    517 U.S. 806
    , 813 (1996) (constitutional basis for
    objecting to discriminatory application of law is guarantee of
    equal protection, not violation of Fourth Amendment); Lora, 
    451 Mass. at 436
     (same).    See also Nieves v. Bartlett, 
    139 S. Ct. 1715
    , 1731 (2019) (Gorsuch, J., concurring) (detention based on
    race, even where detention otherwise would be permissible under
    Fourth Amendment, violates equal protection).
    As the United States Court of Appeals for the Sixth Circuit
    has explained, the guarantee of equal protection "does not fit
    neatly into the various stages of Fourth Amendment search and
    seizure analysis."     Avery, 
    137 F.3d at 355
    .   Because the equal
    protection clause is intended to prevent discriminatory
    governmental conduct, the particular "stage" of an investigation
    is not relevant.     See 
    id.
       "[T]he heart of the [e]qual
    [p]rotection [c]lause is its prohibition of discriminatory
    treatment.   If a government actor has imposed unequal burdens
    based upon race, it has violated the [equal protection] clause"
    (citation omitted).     
    Id.
        See Nyema, 249 N.J. at 529
    (investigative techniques that do not qualify as searches or
    seizures requiring reasonable suspicion "must still comport with
    the [e]qual [p]rotection [c]lause").      See also Marshall v.
    Columbia Lea Regional Hosp., 
    345 F.3d 1157
    , 1166 (10th Cir.
    2003) ("That [the plaintiff's] stop and arrest were based on
    40
    probable cause does not resolve his more troubling claim that he
    was targeted by [a police officer] on account of his race").
    That does not mean, however, that the Commonwealth is
    precluded from explaining why a police officer stopped a motor
    vehicle or conducted a threshold inquiry.   See Long, 485 Mass.
    at 724-725.   There may be substantial overlap between an inquiry
    into the reasonableness of a stop and the officer's motivation
    for stopping a suspect.6   To be sure, the constitutional basis
    for the stop is not sufficient, standing alone, to rebut an
    inference of selective enforcement.   See id. at 726 ("To meet
    its burden, the Commonwealth would have to do more than merely
    point to the validity of the traffic violation that was the
    asserted reason for the stop").   The burden shifts to the
    Commonwealth to "grapple with all of the reasonable inferences
    6 In Long, 485 Mass. at 725, we included within the totality
    of circumstances a judge could consider "the safety interests in
    enforcing the motor vehicle violation." For example, a police
    officer may stop a vehicle traveling at 110 miles per hour on a
    highway. The driver's excessive and unsafe speed would be both
    the reason for the stop and most likely an adequate,
    nondiscriminatory reason to stop the vehicle. By contrast, a
    police officer is permitted to stop a vehicle traveling at
    sixty-six miles per hour on a highway as a violation of the
    speed limit of sixty-five miles per hour. See Commonwealth v.
    Bacon, 
    381 Mass. 642
    , 644 (1980) (police were warranted in
    stopping vehicle based on observation of traffic violation).
    This latter, nominal traffic violation, however, would not
    suffice as an adequate, race-neutral reason to rebut an
    inference of racial profiling.
    41
    and all of the evidence that a defendant presented and would
    have to prove that the stop was not racially motivated."     
    Id.
    Here, the judge was required to determine whether the
    Commonwealth had rebutted the reasonable inference that the stop
    or investigation was not "motivated at least in part by race" or
    another impermissible classification.    
    Id.
       We conclude that the
    evidence supported the judge's determination that police stopped
    the defendant to investigate his involvement in a recent
    shooting, and not because of his race.
    3.   Conclusion.   As there was no violation of the
    defendant's rights to be protected against unreasonable searches
    and seizures, and against selective enforcement of the laws,
    there was no error in the judge's denial of the defendant's
    motion to suppress.
    Order denying motion
    to suppress affirmed.