Commonwealth v. Feliz , 481 Mass. 689 ( 2019 )


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    SJC-12545
    COMMONWEALTH   vs.   ERVIN FELIZ.
    Suffolk.       September 5, 2018. - March 26, 2019.
    Present:   Gants, C.J., Lenk, Gaziano, Lowy, Budd, Cypher, &
    Kafker, JJ.
    Obscenity, Child pornography. Sex Offender. Global Positioning
    System Device. Practice, Criminal, Probation.
    Constitutional Law, Sex offender, Search and seizure.
    Search and Seizure, Probationer, Expectation of privacy.
    Indictments found and returned in the Superior Court
    Department on March 3, 2015.
    A motion in opposition to the imposition of global
    positioning system monitoring as a condition of probation was
    heard by Robert B. Gordon, J., and a motion for reconsideration
    was considered by him.
    The Supreme Judicial Court granted an application for
    direct appellate review.
    David R. Rangaviz, Committee for Public Counsel Services,
    for the defendant.
    Cailin M. Campbell, Assistant District Attorney, for the
    Commonwealth.
    Maura Healey, Attorney General, & Sarah M. Joss, Special
    Assistant Attorney General, for Massachusetts Probation Service,
    amicus curiae, submitted a brief.
    2
    Eric Tennen, for Massachusetts Association for the
    Treatment of Sexual Abusers & another, amici curiae, submitted a
    brief.
    GAZIANO, J.   After pleading guilty to possession and
    distribution of child pornography, the defendant was sentenced
    to five concurrent five-year terms of probation, and two
    concurrent two and one-half year sentences of incarceration,
    which were suspended for five years.    In accordance with the
    terms of G. L. c. 265, § 47, which requires judges to impose
    global positioning system (GPS) monitoring as a condition of
    probation for individuals convicted of most sex offenses, the
    sentencing judge imposed GPS monitoring as a condition of the
    defendant's probation.   The defendant opposed the condition of
    GPS monitoring when it was imposed, arguing that mandatory GPS
    monitoring constituted an unreasonable search in violation of
    the Fourth Amendment to the United States Constitution and
    art. 14 of the Massachusetts Declaration of Rights.    After an
    evidentiary hearing, a different Superior Court judge found
    G. L. c. 265, § 47, facially constitutional, and also rejected
    the defendant's as-applied challenge.    The defendant appealed,
    and we allowed his petition for direct appellate review.
    The defendant argues that, as applied to him, the condition
    of mandatory GPS monitoring, pursuant to G. L. c. 265, § 47,
    constitutes an unreasonable search under the Fourth Amendment
    3
    and art. 14.   We consider this argument in light of the United
    States Supreme Court's holding that GPS monitoring is a search.
    See Grady v. North Carolina, 
    135 S. Ct. 1368
    , 1370 (2015).      We
    conclude that G. L. c. 256, § 47, is overinclusive in that GPS
    monitoring will not necessarily constitute a reasonable search
    for all individuals convicted of a qualifying sex offense.
    Article 14 requires an individualized determination of
    reasonableness in order to conduct more than minimally invasive
    searches, and GPS monitoring is not a minimally invasive search.
    To comport with art. 14, prior to imposing GPS monitoring on a
    given defendant, a judge is required to conduct a balancing test
    that weighs the Commonwealth's need to impose GPS monitoring
    against the privacy invasion occasioned by such monitoring.
    We conclude that, in the circumstances of this case, the
    Commonwealth's particularized reasons for imposing GPS
    monitoring on this defendant do not outweigh the privacy
    invasion that GPS monitoring entails.     Accordingly, as applied
    to this defendant, GPS monitoring is an unconstitutional search
    under art. 14.1
    1.   Background.   a.   Prior proceedings.   The defendant was
    arrested in December 2014; he was arraigned in the District
    1 We acknowledge the amicus brief of the Massachusetts
    Association for the Treatment of Sexual Abusers and the
    Massachusetts Association of Criminal Defense Lawyers, and the
    amicus brief of the Massachusetts Probation Service.
    4
    Court on charges related to possession and distribution of child
    pornography and was placed on pretrial release with GPS
    monitoring.    In March 2015, the defendant was indicted on
    charges of two counts of possession of child pornography, in
    violation of G. L. c. 272, § 29C, and five counts of
    distribution of child pornography, in violation of G. L. c. 272,
    § 29B (a).    He was arraigned in the Superior Court in April
    2015, and placed on pretrial probation, with conditions,
    including reporting to a probation officer, in person, once per
    week.    The condition of GPS monitoring was waived at that time,
    on the defendant's motion, and the GPS device was removed.      In
    April 2016, the defendant pleaded guilty to all of the charges.
    A Superior Court judge sentenced him to five concurrent five-
    year terms of probation and two concurrent terms of
    incarceration of two and one-half years in a house of
    correction, suspended for five years.2
    At the time of his guilty pleas, the defendant was given
    notice of his obligation to register as a sex offender;
    registration also was imposed as a condition of probation.      As
    statutorily mandated, see G. L. c. 6, §§ 178C-178P, the
    2 The judge also ordered that the defendant could apply for
    early termination of probation after four years of full
    compliance with the imposed conditions.
    5
    defendant thereafter registered as a sex offender, and was
    classified as a level one offender.3
    General Laws c. 265, § 47, mandates that any person placed
    on probation for numerous enumerated sex offenses4 is required to
    wear a GPS device.   See Commonwealth v. Guzman, 
    469 Mass. 492
    ,
    496 (2014) ("G. L. c. 265, § 47, applies to any defendant who
    has been convicted of a predicate offense and sentenced to a
    term of probation").   Accordingly, the sentencing judge imposed
    GPS monitoring as a condition of the defendant's probation.     The
    judge also imposed additional conditions of probation, including
    that the defendant not reside with anyone under the age of
    sixteen; not work or hold a job that would involve contact with
    children under sixteen; and remain 300 feet away from schools,
    parks, and day care centers.
    3 Individuals classified as level one sex offenders have
    been determined to pose a low risk of reoffending and a low
    degree of danger to the public. See G. L. c. 6, § 178K (2) (a)
    ("Where the board determines that the risk of reoffense is low
    and the degree of dangerousness posed to the public is not such
    that a public safety interest is served by public availability,
    it shall give a level [one] designation to the sex offender").
    4 General Laws c. 6, § 178C, defines "[s]ex offense" to
    include "dissemination of visual material of a child in a state
    of nudity or sexual conduct" and "possession of child
    pornography."
    6
    At sentencing, the defendant signed an order of probation
    conditions and a GPS equipment liability acceptance form.5     In
    signing the order of probation conditions, the defendant
    certified that he had "read and understood the above conditions
    of probation," and would "agree to obey them."      The defendant
    was fitted with a GPS monitoring device in accordance with the
    terms of probation.   On the day he was sentenced, the defendant
    filed a motion seeking to waive imposition of GPS monitoring as
    a condition of probation; he argued that the mandatory GPS
    monitoring requirement of G. L. c. 265, § 47, constitutes an
    unconstitutional search and seizure under art. 14 and the Fourth
    Amendment.   The Commonwealth opposed the motion.
    In February 2017, a different Superior Court judge held a
    three-day evidentiary hearing to assess the reasonableness of
    the defendant's statutorily imposed condition of GPS monitoring.
    The judge heard testimony from the defendant concerning his
    experience as a probationer subject to GPS monitoring; expert
    5 The GPS monitoring contract indicates that no exclusion
    zones were applied to the defendant's GPS device, and that,
    because he lives in a city, where it is virtually impossible not
    to be within 300 feet of a park or school when traveling on any
    city street, the defendant was not precluded from passing by a
    school or park, but would be considered in violation if he
    loitered in or near such a location. This is consistent with
    the probation officer's testimony at the hearing on the
    defendant's motion to waive GPS monitoring, and the judge's
    comment that actually issuing an alert every time the defendant
    passed by a park or school would be impractical and "over-
    alerting."
    7
    testimony, by Commonwealth and defense experts, on social
    science research on rates of recidivism for contact and
    noncontact sex offenders; and testimony about the nature of GPS
    monitoring generally in Massachusetts.6
    In April 2017, the judge denied the defendant's motion.
    The defendant filed a timely appeal.   In February 2018, the
    defendant filed a motion for reconsideration, seeking to
    supplement the record with additional evidence concerning issues
    experienced with the day-to-day use of the GPS device, and
    difficulties with connectivity to the central monitoring
    station.   This motion was allowed in part, and denied in part;
    the motion judge amended his findings of fact to include
    reference to a subset of additional GPS alerts that the
    defendant had experienced.   In March 2018, the judge issued
    amended findings and rulings.   The defendant appealed to the
    Appeals Court from the partial denials; the Appeals Court
    thereafter consolidated the defendant's pending appeals.    The
    defendant also sought direct appellate review before this court.
    In June 2018, we allowed the defendant's petition for direct
    appellate review, and transferred the consolidated appeals to
    this court.
    6 Six witnesses testified at the hearing, including the
    defendant, two probation officers, an employee of the electronic
    monitoring program office, and two expert psychologists.
    8
    b.   GPS monitoring.    We summarize the facts as found by the
    motion judge, supplemented by uncontested facts in the record
    and testimony credited by the motion judge that does not
    contravene the judge's findings.   See Commonwealth v. Jones-
    Pannell, 
    472 Mass. 429
    , 431 (2015).    We "accept subsidiary
    findings based partly or wholly on oral testimony, unless
    clearly erroneous."   Commonwealth v. Tremblay, 
    480 Mass. 645
    ,
    646 (2018).
    More than 3,900 individuals in the Commonwealth, on
    probation, pretrial release, and parole, are subject to court-
    ordered GPS monitoring, some of them pursuant to G. L. c. 265,
    § 47.
    Probationers subject to GPS monitoring in the Commonwealth
    are fitted either with a one-piece or a two-piece GPS device,
    usually worn around the ankle.   The probation service uses the
    electronic monitoring program (ELMO) to supervise offenders
    placed on GPS monitoring.   ELMO operates a monitoring center
    located in Clinton, staffed by probation service employees.
    ELMO probation service employees work in conjunction with
    probation officers who are assigned to supervise individuals
    placed on GPS monitoring.
    The GPS devices used by ELMO store information about a
    wearer's latitude and longitude, gathered via communication with
    a network of satellites.    This information is uploaded through a
    9
    cellular telephone network to computers at the ELMO monitoring
    center that are running third-party monitoring software.      The
    timing of uploads depends on many factors, including
    connectivity with the satellites used in the GPS component of
    the system, issues with the cellular telephone service provider,
    and connectivity and timing issues with the ELMO center.
    According to the corporation that currently leases GPS devices
    to the Commonwealth, the location data gathered by its GPS
    monitoring equipment is ninety percent accurate within thirty
    feet.7   See Commonwealth v. Thissell, 
    457 Mass. 191
    , 198 n.15
    (2010), citing National Space–Based Positioning, Navigation, and
    Timing Coordination Office, The Global Positioning System.
    A GPS-monitored person's location information continuously
    is gathered and uploaded to ELMO computer systems.     ELMO
    employees generally review a probationer's location information
    only when the ELMO monitoring software generates an "alert."
    Even when no alert is generated, however, ELMO employees are
    able to look up and retrieve a probationer's historical location
    data.    The alert notifies an ELMO assistant coordinator that one
    of several issues has arisen with respect to a given GPS device,
    and prompts the assistant coordinator to address the issue by
    7 The Commonwealth has not conducted independent testing to
    assess the accuracy of the GPS monitoring hardware or software
    that it uses.
    10
    attempting to contact the probationer.    Any of several kinds of
    alert may lead to the issuance of an arrest warrant for a
    probationer, if probation employees are unable to "resolve" the
    alert in a timely manner.8
    When a probationer subject to GPS monitoring has been told
    to stay away from certain addresses, a probation department
    employee may be able to enter a specific "exclusion zone" into
    the ELMO monitoring system.    If an exclusion zone is entered,
    the system will trigger an alert when a GPS-monitored individual
    enters that zone.    The system permits entry of exclusion zones
    by specific addresses.    The system does not permit entry of more
    general exclusion zones, such as "parks" or "schools"; to
    approximate that type of restriction, the street addresses of
    the pertinent parks or schools would have to be entered
    manually.
    8   As the motion judge explained,
    "Assistant Coordinators are called upon to exercise some
    level of discretion to determine in the first instance
    whether the situation presents a bona fide compliance
    concern. If the probationer cannot be reached, the
    Assistant Coordinator will contact his Probation Officer.
    If an alert activates after hours and the Probation Officer
    cannot be located, an on-call Chief Probation Officer is
    available to address the matter. Arrest warrants are
    pursued and issued only if the alert cannot be explained
    and cleared after a substantial period of time, and that
    period of time will vary depending upon the nature of the
    alert."
    11
    It is common for a GPS monitoring device to issue alerts
    related to cellular or satellite connection, as well as the
    integrity of the device itself.   Many alerts occur because of
    events unrelated to a defendant's efforts to comply with
    conditions of probation.   For instance, when a defendant's
    device loses its signal connection with the cellular telephone
    network, an "unable to connect" alert is triggered.    If the GPS
    device is within cellular network coverage, but loses connection
    to the satellite network, a "motion, no GPS" alert is triggered.
    If the device becomes cut or broken for any reason, it will
    trigger a "tampering" alert.    While a GPS device is expected to
    retain a battery charge for approximately twenty-four hours,
    battery life may decline, and may result in common "charging
    alerts" when battery life runs low.    Each time an alert is
    triggered, the probationer must communicate with a probation
    employee to attempt to resolve the issue.    If the issue is not
    resolved, the probationer risks being subject to an arrest
    warrant and possible arrest.9
    9 According to the probation service's own estimates, on any
    given day, it is monitoring approximately 5,000 individuals,
    more than 3,400 of whom are subject to GPS monitoring. On any
    given day, the approximately fifty probation staff members must
    respond to approximately 1,700 alerts. Although in some cases
    this may reflect more than one alert for a given individual, in
    general, this number is roughly thirty-four percent of the total
    individuals monitored, and approximately one-half of the total
    number of individuals subject to GPS monitoring, and includes
    alerts for GPS monitoring of pretrial probationers; probationers
    12
    At the time of the evidentiary hearing, approximately ten
    months after postconviction monitoring had begun, the defendant
    had experienced at least thirty-one alerts.10   A number of these
    alerts involved power disconnection and the failure of the
    defendant's GPS device to maintain a satellite connection.   The
    alerts were resolved after periods of time ranging from
    approximately thirty minutes to six hours, and none of them had
    resulted in the defendant's arrest.11
    convicted of a range of different offenses, including sex
    offenses; and individuals subject to remote alcohol monitoring.
    10In February 2018, the defendant submitted evidence to the
    motion judge that, between September 2016 and February 2018, his
    GPS monitoring device had issued 166 alerts. Citing the need
    for "finality of judgments and the efficient use of court
    resources," the motion judge amended his findings of fact to
    include only the eighteen additional GPS alerts that had been
    triggered before the conclusion of the evidentiary hearing in
    February 2017. The judge did not make any finding that the
    probation department reports concerning later alerts were in any
    way unreliable or not credible.
    11The defendant also sought to introduce at the hearing,
    and included in his record appendix, probation reports of alerts
    generated during the five months that he was on pretrial GPS
    monitoring. Because those reports were preconviction, the judge
    did not consider them at the hearing, and also did not make any
    determination with respect to their credibility. In its filings
    in the Superior Court, the Commonwealth agreed that the
    defendant had been subject to alerts at least three or four
    times per week during that period, as a result of connectivity
    issues in the neighborhood where he lives and works.
    Examination of those reports shows that, on numerous occasions,
    resolution of the alerts took many hours; the defendant was at
    times ordered to go outside and walk around in order to obtain a
    signal; and multiple warrants for his arrest issued when he
    still was not able to obtain one, while following the
    13
    2.   Discussion.    In this case, the defendant argues that
    GPS monitoring, imposed pursuant to G. L. c. 265, § 47,
    constitutes an unreasonable search under the Fourth Amendment
    and art. 14.
    a.   Standard of review.   We review a challenge to the
    constitutionality of a statute de novo.      See Commonwealth v.
    McGhee, 
    472 Mass. 405
    , 412 (2015).      "In accordance with canons
    of statutory construction, a statute is presumed to be
    constitutional."     
    Id.
        See Luk v. Commonwealth, 
    421 Mass. 415
    ,
    431 (1995).    "[T]he historic fact of the Legislature's choice,"
    however, "does not relieve us of our constitutional obligation
    to review the validity of a search and seizure in light of art.
    14."   Commonwealth v. Blood, 
    400 Mass. 61
    , 75 (1987).
    Generally, "when the constitutionality of a statute is
    challenged, the question to be decided is whether the statute is
    unconstitutional as applied in the particular case."       United
    States v. Ferrara, 
    771 F. Supp. 1266
    , 1282 (D. Mass. 1991).
    b.   GPS monitoring as a constitutional search.    In 2015,
    the United States Supreme Court established that "a State . . .
    conducts a search when it attaches a device to a person's body,
    without consent, for the purpose of tracking that individual's
    movements."    Grady, 
    135 S. Ct. at 1370
    .     The petitioner in that
    instructions provided by probation. Ultimately, all of the
    alerts were resolved and the warrants were recalled.
    14
    case had been placed on GPS monitoring after being classified as
    a recidivist sex offender.   
    Id. at 1369
    .   Because only
    "unreasonable" searches violate the Fourth Amendment, the Court
    remanded the matter so that the North Carolina court could
    determine "whether the State's monitoring program is
    reasonable -- when properly viewed as a search."   12   
    Id. at 1371
    .
    Following remand, the North Carolina Court of Appeals
    interpreted Grady to require "case-by-case determinations of
    reasonableness, now . . . referred to as 'Grady hearings,'" at
    which the State must provide "sufficient record evidence to
    support" a finding that GPS monitoring imposed by State statute
    "is reasonable as applied to this particular defendant"
    (emphasis in original).   See State v. Grady, 
    817 S.E.2d 18
    , 23,
    26 (N.C. Ct. App. 2018) (Grady II).   The court concluded that
    the State's burden of establishing that GPS monitoring is
    reasonable includes a requirement (without explanation as to how
    that is to be accomplished) that the State provide evidence that
    GPS monitoring actually is effective in protecting the public
    12 Probationers retain a reasonable, albeit diminished,
    expectation of privacy. See Commonwealth v. Moore, 
    473 Mass. 481
    , 482 (2016); Commonwealth v. LaFrance, 
    402 Mass. 789
    , 795
    (1988). The defendant in State v. Grady, 
    817 S.E.2d 18
    , 24
    (N.C. Ct. App. 2018), arguably had a higher expectation of
    privacy because he had completed his sentence and was not on
    probation. North Carolina's GPS monitoring program applies not
    only to individuals under State penal supervision, but also to
    people with a prior conviction who are "not otherwise subject to
    any direct supervision by State officers." See 
    id.
    15
    against recidivism by sex offenders.   Id. at 27-28.   See State
    v. Griffin, 
    818 S.E.2d 336
    , 338, 342 (N.C. Ct. App. 2018).    In
    assessing reasonableness, the court has looked to evidence
    regarding a "defendant's current threat of reoffending," Grady
    II, supra at 26, and has evaluated whether the State presented
    "evidence concerning its specific interest in monitoring [a
    given] defendant,"13 id. at 27.
    13 The South Carolina Supreme Court similarly interpreted
    the decision in Grady v. North Carolina, 
    135 S. Ct. 1368
    , 1370
    (2015), to require "an individualized inquiry into the
    reasonableness of the [GPS monitoring] search in every case,"
    because "of the widely varying circumstances that may lead to
    automatic, mandatory electronic monitoring imposed for
    [misdemeanor] failure to register" as a sex offender in
    accordance with the requirements of South Carolina's sex
    offender registry act. See State v. Ross, 
    423 S.C. 504
    , 513
    (2018).
    Other jurisdictions to have considered the issue have taken
    varying approaches, often in the context of a more
    particularized statute requiring monitoring of a specific subset
    of sex offenders. See, e.g., Belleau v. Wall, 
    811 F.3d 929
    ,
    931, 933-937 (7th Cir. 2016) (imposition of GPS monitoring
    pursuant to 
    Wis. Stat. § 301.48
    , requiring sex offenders
    released from civil commitment to submit to GPS monitoring under
    specific circumstances, was reasonable where qualifying sex
    offenses involved sexual contact with children and defendant was
    recidivist sex offender); Doe No. 1 v. Coupe, 
    143 A.3d 1266
    ,
    1274-1279 (Del. Ch. 2016), aff'd, 
    158 A.3d 449
     (Del. 2017)
    (applying three-part "special needs" framework to determine that
    mandatory GPS monitoring of "Tier III," highest risk, sex
    offenders was reasonable); State v. Kane, 
    2017 VT 36
    , ¶¶ 26-31
    (GPS monitoring condition was reasonable where monitored
    individual on probation had removed her son from his legal
    guardian and transported him across State lines, and probation
    conditions required probationer to stay away from son's school
    and residence).
    16
    In Guzman, 469 Mass. at 498, we heard a constitutional
    challenge to G. L. c. 265, § 47, and concluded that the statute
    does not violate due process.     Because the record in Guzman was
    "too sparse to permit an adequate assessment" of the defendant's
    claim that GPS monitoring infringed upon his right to be free of
    unreasonable searches and seizures, we did not address that
    claim.    Id. at 497.   Our decision in Guzman does not alter the
    inquiry we must make in this case, to determine whether
    imposition of ongoing, mandatory GPS monitoring (searching) of
    all persons convicted of a sex offense of any type in the
    Commonwealth is "reasonable" under art. 14 and the Fourth
    Amendment.14   In Guzman, supra, we discussed mandatory GPS
    monitoring, as required by G. L. c. 265, § 47, as a
    legislatively imposed "punishment[] for a given offense," and,
    consequently, considered "only whether that mandatory sentence
    meets the rational basis test."    Guzman, supra, citing
    Commonwealth v. Therriault, 
    401 Mass. 237
    , 241-242 (1987).
    After considering the Legislature's reasons for deciding to
    impose mandatory GPS monitoring, we concluded that the GPS
    monitoring requirement of G. L. c. 265, § 47, had a rational
    basis and therefore did not offend due process.    See Guzman,
    14See People v. Hallak, 
    310 Mich. App. 555
    , 578-579, 583
    (2015), rev'd on other grounds, 
    499 Mich. 879
     (2016) (assessing
    Fourth Amendment reasonableness of GPS monitoring apart from
    classifying GPS monitoring as legislatively imposed sanction).
    17
    supra at 500.   Because the defendant in Guzman did not raise the
    issue, we did not address whether "the mandatory imposition of
    GPS monitoring could in some circumstances constitute a
    punishment 'disproportionate to the magnitude of the crime' in
    question."   Id. at 497 n.8, quoting Commonwealth v. O'Neal, 
    369 Mass. 242
    , 247–248 (1975).   We nonetheless have characterized
    the effects of GPS monitoring pursuant to G. L. c. 265, § 47, as
    "singularly punitive."   See Commonwealth v. Selavka, 
    469 Mass. 502
    , 505 n.5 (2014).
    c.   GPS monitoring as a warrantless search.   No probable
    cause and warrant requirement inheres in G. L. c. 265, § 47.
    Indeed, GPS monitoring, as here, is imposed on probationers
    without recourse to probable cause and a search warrant.      It has
    become axiomatic that not all searches require a warrant and
    probable cause to be "reasonable," and therefore
    constitutional.15   See Maryland v. King, 
    569 U.S. 435
    , 448
    (2013); United States v. Knights, 
    534 U.S. 112
    , 118 (2001) ("The
    touchstone of the Fourth Amendment is reasonableness . . .").
    15Indeed, the United States Supreme Court has determined
    that "[a] State's operation of a probation system . . . may
    justify departures from the usual warrant and probable-cause
    requirements." See Griffin v. Wisconsin, 
    483 U.S. 868
    , 873–874
    (1987). See also Skinner v. Railway Labor Executives' Ass'n,
    
    489 U.S. 602
    , 640 (1989) (Marshall, J., dissenting) (noting that
    "the searches in . . . Griffin . . . were supported by
    individualized evidence suggesting the culpability of the
    persons").
    18
    The reasonableness of a search is assessed under the "totality
    of the circumstances, including the nature and purpose of the
    search and the extent to which the search intrudes upon
    reasonable privacy expectations."   Grady, 
    135 S. Ct. at 1371
    .
    In this case, the question is whether imposition of GPS
    monitoring on this defendant itself is reasonable, and thus
    constitutional, under the Fourth Amendment and art. 14,16 given
    the government's strong interests both in protecting the public
    from sexual predators and in rehabilitating convicted sex
    offenders.
    To be sure, we previously have upheld certain programmatic,
    suspicionless searches as constitutional -- but only when those
    searches minimally invaded already diminished expectations of
    privacy.   Where we upheld the constitutionality of roadblock
    seizures intended to locate impaired drivers, for instance, we
    emphasized that the result we reached did not "open[] the door
    for suspicionless searches and seizures in other contexts."
    Commonwealth v. Shields, 
    402 Mass. 162
    , 167 (1988).   See Landry
    v. Attorney Gen., 
    429 Mass. 336
    , 350 (1999), cert. denied, 
    528 U.S. 1073
     (2000) (upholding mandatory, minimally invasive
    deoxyribonucleic acid [DNA] searches for identification purposes
    16 This is a question distinct from asking whether discrete
    searches of data that has been collected by GPS monitoring may
    be reasonable. See Commonwealth v. Johnson, 481 Mass.      ,
    (2019).
    19
    as constitutional for convicted persons with low expectations of
    privacy in their identity).   See also Horsemen's Benevolent &
    Protective Ass'n v. State Racing Comm'n, 
    403 Mass. 692
    , 703
    (1989).   Cf. Guiney v. Police Comm'r of Boston, 
    411 Mass. 328
    ,
    342 (1991).
    In sum, when the government seeks to conduct a search that
    is more than minimally invasive, art. 14 requires an
    individualized determination of reasonableness.   For reasons
    that we outline infra, GPS monitoring is not a minimally
    invasive search.   Accordingly, art. 14 requires individualized
    determinations of reasonableness in order to impose GPS
    monitoring as a condition of probation.   Mandatory, blanket
    imposition of GPS monitoring on probationers, absent
    individualized determinations of reasonableness, is
    unconstitutional under the Massachusetts Declaration of Rights.
    d.   Balancing test to assess constitutional reasonableness.
    To determine whether it is reasonable for the government to
    conduct a search absent probable cause, courts conduct a
    balancing test that weighs "the need to search or seize against
    the invasion that the search or seizure entails."17    Commonwealth
    17In certain narrow circumstances, the United States
    Supreme Court has upheld suspicionless searches as
    constitutional under a "closely guarded category" known as the
    "special needs exception" to the Fourth Amendment. See Chandler
    v. Miller, 
    520 U.S. 305
    , 309 (1997). We have yet to justify
    20
    v. Catanzaro, 
    441 Mass. 46
    , 56 (2004).    See Samson v.
    California, 
    547 U.S. 843
    , 848 (2006), quoting Knights, 
    534 U.S. at 118-119
    ; New Jersey v. T.L.O., 
    469 U.S. 325
    , 341 (1985);
    Terry v. Ohio, 
    392 U.S. 1
    , 22-25 (1968); Commonwealth v.
    Rodriguez, 
    472 Mass. 767
    , 776 (2015); Landry, 429 Mass. at 348,
    citing Guiney, 
    411 Mass. at 331-332
    .
    As a probationer, the defendant lawfully may be subjected
    to reasonable restraints on "freedoms enjoyed by law-abiding
    citizens."    See Knights, 
    534 U.S. at 119
    .   See also Commonwealth
    v. Pike, 
    428 Mass. 393
    , 402 (1998).    Consequently, with respect
    to the Fourth Amendment and art. 14, the defendant possesses a
    diminished expectation of privacy relative to the general
    population.   See Knights, 
    supra at 119-120
    ; Commonwealth v.
    Moore, 
    473 Mass. 481
    , 485 (2016).18    The defendant's status as a
    probationer informs our assessment of both "the degree to which
    [a search] intrudes upon an individual's privacy" and "the
    degree to which it is needed for the promotion of legitimate
    governmental interests."   See Knights, 
    supra at 119
    .
    searches of individuals on the basis of the special needs
    exception, and decline to do so here.
    18This court also has interpreted art. 14 to prohibit
    suspicionless searches of parolees, thus extending the
    protections of art. 14 beyond those of the Fourth Amendment.
    Moore, 473 Mass. at 482.
    21
    Nonetheless, the government does not have an "unlimited"
    ability to infringe upon a probationer's still-existing, albeit
    diminished, expectations of privacy.     See Griffin v. Wisconsin,
    
    483 U.S. 868
    , 875 (1987).    "[T]he fact of 'diminished privacy
    interests does not mean that the Fourth Amendment falls out of
    the picture entirely.'"     Carpenter v. United States, 
    138 S. Ct. 2206
    , 2219 (2018), quoting Riley v. California, 
    573 U.S. 373
    ,
    392 (2014).   Furthermore, that an individual has been convicted
    of a crime does not eliminate the person's reasonable
    expectation of privacy under art. 14.    See Commonwealth v.
    LaFrance, 
    402 Mass. 789
    , 794-795 (1988).19
    In light of the foregoing, we consider the extent to which
    GPS monitoring of this particular defendant advances the
    Commonwealth's interests in rehabilitation of the probationer
    and protection of the public, and the extent of the incremental
    privacy intrusion occasioned by GPS monitoring on the
    defendant's diminished, but still extant, expectations of
    privacy as a probationer.    See Belleau v. Wall, 
    811 F.3d 929
    ,
    19In LaFrance, 
    402 Mass. at 790
    , we struck down as
    unconstitutional a special condition of probation that required
    a probationer to "[s]ubmit to any search of herself, her
    properties or any place where she then resides or is situate,
    with or without a search warrant, by a probation officer or by
    any law enforcement officer at the direction or by the request
    of the probation officer." 
    Id.
     at 791 n.2. We concluded that
    individual searches of a probationer could be proper under
    art. 14 if conducted on the basis of reasonable suspicion of
    wrongdoing. 
    Id. at 792
    .
    22
    934-935 (7th Cir. 2016) (considering "the incremental effect of
    the challenged statute on the [defendant's] privacy").     Whether
    the government's interest in imposing GPS monitoring outweighs
    the privacy intrusion occasioned by GPS monitoring, thus
    constituting a reasonable search, depends on a constellation of
    factors.     Because reasonableness depends "on the totality of the
    circumstances," Grady, 
    135 S. Ct. at 1371
    , no one factor will be
    dispositive in every case.
    We conclude that, in the circumstances here, the
    Commonwealth's particularized reasons for imposing GPS
    monitoring on this defendant do not outweigh the privacy
    intrusion occasioned by the requirement of GPS monitoring.
    Therefore, imposing GPS monitoring on this defendant would
    violate the requirements of art. 14.
    e.      Signing conditions of probation does not alter art. 14
    analysis.     The fact that the defendant signed a probation
    contract acceding to a statutorily mandated condition of GPS
    monitoring does not change our constitutional analysis.     See
    Guiney, 
    411 Mass. at 341
     (consent to search is "virtually
    meaningless unless the consent requirement [is] 'reasonable'").
    See also O'Connor v. Police Comm'r of Boston, 
    408 Mass. 324
    , 329
    (1990) ("the plaintiff would not be barred from relief if his
    consent to be the subject of a search and seizure were
    unreasonably required as a condition of his employment"); United
    23
    States v. Lara, 
    815 F.3d 605
    , 609 (9th Cir. 2016) ("We have
    already held that a probationer's acceptance of a search term in
    a probation agreement does not by itself render lawful an
    otherwise unconstitutional search of a probationer's person or
    property").
    With respect to GPS monitoring in particular, we previously
    have described imposition of GPS monitoring under G. L. c. 265,
    § 47, as taking place without the consent of the monitored
    person.   See Commonwealth v. Cory, 
    454 Mass. 559
    , 570 (2009)
    ("There is no context other than punishment in which the State
    physically attaches an item to a person, without consent and
    also without consideration of individual circumstances, that
    must remain attached for a period of years").   Further, "[t]he
    coercive quality of the circumstance in which a defendant seeks
    to avoid incarceration by obtaining probation on certain
    conditions makes principles of voluntary waiver and consent
    generally inapplicable."   LaFrance, 402 Mass. at 791 n.3.
    Thus, where a probationer accedes to a contract of
    probation that includes statutorily mandated GPS monitoring, or
    signs a GPS equipment contract to establish that monitoring, the
    acceptance cannot be viewed as consent, where imposition of GPS
    monitoring itself does not meet the requirements of art. 14.
    Accordingly, to determine whether GPS monitoring of a
    probationer who signed a contract for GPS monitoring is
    24
    reasonable, we conduct "the same type of art. 14 analysis that
    would have been required without the consent."     Guiney, 
    411 Mass. at 341
    .   See Moore, 473 Mass. at 487 n.6 (parole board may
    not create conditions of release that "contract around"
    requirements of art. 14, because to do so "inappropriately
    [would] allow the parole board to compel a parolee, keen to
    commute his or her sentence, to accept a condition that would
    unnecessarily and unreasonably limit his or her art. 14 privacy
    rights").
    f.   Government interests.   "The prevention of sexual
    exploitation and abuse of children constitutes a government
    objective of surpassing importance."   New York v. Ferber, 
    458 U.S. 747
    , 757 (1982).   In addition, the Commonwealth has a
    "vital interest in rehabilitating convicted sex offenders,"
    McKune v. Lile, 
    536 U.S. 24
    , 33 (2002), in part because
    rehabilitation protects the public, by reducing the possibility
    of future offenses.
    As relevant here, the Commonwealth also has a vital
    "interest in protecting the children exploited by the [child
    pornography] production process."   Ashcroft v. Free Speech
    Coalition, 
    535 U.S. 234
    , 240 (2002).   The reproduction and
    dissemination of child pornography itself harms the children who
    are depicted and revictimized with each viewing.    Paroline v.
    United States, 
    572 U.S. 434
    , 440 (2014), quoting Ferber, 458
    25
    U.S. at 759.   Therefore, the government's interest remains
    strong where the sex offense in question is an online,
    noncontact offense.    "[C]hild pornography is 'a permanent
    record' of the depicted child's abuse, and the 'harm to the
    child is exacerbated by [its] circulation."     Paroline, supra,
    quoting Ferber, 
    supra.
        Separately, "[t]he demand for child
    pornography harms children in part because it drives production,
    which involves child abuse."    Paroline, supra at 439-440.
    g.   Privacy infringement.   Probationers who have been
    convicted of sex offenses are subject to monitoring in numerous
    ways apart from GPS monitoring.20    Nonetheless, GPS monitoring
    results in "a far greater intrusion on the defendant's liberty
    than that associated with traditional probation monitoring."
    Commonwealth v. Goodwin, 
    458 Mass. 11
    , 22 (2010).    See Cory, 454
    Mass. at 570-571.     That probationers subject to GPS monitoring
    20Probation service records about a given probationer "may
    at all times be inspected by police officials of the towns of
    the commonwealth." G. L. c. 276, § 90. Probation officers
    enforce probation conditions through means that may include home
    visits. In this case, the defendant is required to report to a
    probation officer in person once every fourteen days, and to
    provide verification of his current address and income. Like
    all convicted sex offenders, the defendant was required to
    register with the Sex Offender Registry Board, G. L. c. 6,
    § 178D, and to provide it with personal identifying information,
    including, among other things, his "name[s], aliases used, date
    and place of birth, sex, race, height, weight, eye and hair
    color, social security number, home address, any secondary
    addresses and work address and, if the sex offender works at or
    attends an institution of higher learning, the name and address
    of the institution." G. L. c. 6, § 178D (a), (e).
    26
    have a more limited entitlement to privacy does not render GPS
    monitoring minimally invasive when applied to them.
    In Landry, 429 Mass. at 350, we determined that subjecting
    individuals who had been convicted of a crime, and thus
    possessed "a low expectation of privacy in their identity," to a
    "minimally invasive [DNA] test," which can provide "an extremely
    accurate record of identification," constituted a minimal
    infringement of privacy in the individuals' identity.     We
    further determined that the privacy infringement occasioned by
    such a test was "outweighed by the strong State interest in
    preserving a positive recorded identification of convicted
    persons."   Id.
    GPS monitoring, however, gathers much more information than
    the identity-related test at issue in Landry, and gathers this
    information over a much longer period of time.   The experience
    of accommodating a device that remains attached to the body for
    a prolonged period of time differs materially from the one-time,
    minimal physical intrusion occasioned by a properly conducted
    DNA test.   While being monitored using a GPS device, a
    probationer is subject both to the physical intrusion of the GPS
    device and the effects of that intrusion.   The physically
    intrusive dimensions of GPS monitoring are relevant to assessing
    both privacy infringement as well as the "nature" of the GPS
    27
    search, see Grady, 
    135 S. Ct. at 1371
    , and its "manner of
    execution."   See King, 569 U.S. at 448.
    As presently conducted, GPS monitoring intrudes upon the
    defendant's personal privacy in a number of ways.   On several
    occasions, to regain a lost satellite connection, probation
    employees have instructed the defendant to walk around outside
    at various times of day or evening.   This has included requiring
    the defendant to leave his job and walk around outside during
    work hours, risking potential economic consequences, including
    loss of employment.   He has been telephoned multiple times at
    work when a signal was lost, and has attempted to arrange for
    another employee voluntarily to handle his immediate tasks when
    he was required to be away from his desk attempting to obtain a
    connection.   The motion judge determined that individuals
    subject to GPS monitoring experience "frequent" charging alerts;
    that signal and connectivity alerts are "not uncommon"; and that
    "practical problems and life inconveniences" can "arise as a
    result" of "limitations of ELMO's alerts system."   This level of
    intrusion on a probationer's person cannot be deemed "minimally
    invasive."
    In addition, GPS tracking amasses "a substantial quantum of
    intimate information about [a] person."    United States v. Jones,
    
    565 U.S. 400
    , 416 (2012).   GPS monitoring gathers vastly more
    information than otherwise would be collected in accordance with
    28
    a defendant's other conditions of probation.    As currently in
    use in the Commonwealth, GPS devices collect one data point of
    latitude and longitude per minute.     In addition to collecting
    points of latitude and longitude, to determine a precise
    location, GPS devices collect information about a wearer's speed
    of travel, such that it is possible to tell if a person is
    driving, running, or walking.     This detailed data is stored for
    an indefinite amount of time.     GPS location data "is detailed,
    encyclopedic, and effortlessly compiled."     Carpenter, 
    138 S. Ct. at 2216
    .   It is also because this detailed and "encyclopedic"
    data is stored indefinitely, and because examination practices
    are subject to change and presently are unregulated by statute,
    that the continuous collection of detailed location data through
    GPS monitoring cannot be termed minimally invasive.
    As mentioned, we have observed that "[t]he GPS monitoring
    mandated by G. L. c. 265, § 47, is not like other conditions of
    probation . . . [in that] the imposition of GPS monitoring is
    singularly punitive in effect."     Selavka, 469 Mass. at 505 n.5.
    See Cory, 454 Mass. at 560 (retroactive application of GPS
    monitoring to individuals placed on probation for qualifying sex
    offenses before G. L. c. 265, § 47, took effect violated ex post
    facto provisions of Massachusetts and United States
    Constitutions).
    29
    h.   Assessing the balance in this case.    The government's
    strong interest in protecting the public from sex offenders
    forms a critical component of the balancing test to determine
    whether imposition of GPS monitoring on this particular
    defendant was reasonable.    To comply with art. 14, however, the
    Commonwealth also must establish how GPS monitoring, when viewed
    as a search, furthers its interests.   The "State must produce a
    particularized reason for the need for . . . searches and
    seizures."    Landry, 429 Mass. at 348, citing Guiney, 
    411 Mass. at 331-332
    .   Ultimately, the particularized reasons for a search
    must "outweigh[] the degree of invasiveness occasioned by [the
    State's] action."    Landry, supra.
    In this case, the Commonwealth's particularized reasons for
    imposing GPS monitoring on this specific defendant, who was
    convicted of noncontact sex offenses, do not outweigh the
    privacy intrusion occasioned by GPS monitoring.    This defendant
    has no psychiatric diagnosis indicating a compulsion toward
    sexually deviant activity; no history of violations of probation
    or terms of pretrial release; no exclusion zone entered into the
    ELMO system capable of generating real-time alerts for real-time
    monitoring; and no geographically proximate victim.   The
    Commonwealth justifies imposition of GPS monitoring on this
    defendant based on the potential use of GPS data as a tool to
    investigate commission of sex crimes should they occur, and the
    30
    deterrence that comes from a defendant knowing that his precise
    location can be ascertained if he were to commit future crimes.
    The Commonwealth, however, has not presented evidence sufficient
    to indicate that this defendant poses a threat of reoffending,
    or otherwise of violating the terms of his probation.    See Grady
    II, 817 S.E.2d at 26.   Under these circumstances, in the context
    of this case, GPS monitoring constitutes an unreasonable search
    under art. 14.
    Following an individualized classification hearing that was
    conducted before the hearing on the defendant's motion for
    reconsideration, the Sex Offender Registry Board classified the
    defendant as a level one sex offender.   That the defendant was
    assigned this classification level means that the hearing
    examiner determined that he posed a low risk of reoffense and a
    low degree of risk to the public.   By contrast, sex offenders
    designated level two or level three are deemed to pose a
    moderate or high risk of reoffending and a concomitant degree of
    risk to the public.
    At the time of the hearing on the motion to remove
    imposition of GPS monitoring, the defendant was thirty-three
    years old and had no prior record of a sex offense.     The motion
    judge credited testimony by a psychological expert, who
    previously had evaluated the defendant, that Internet offenders
    without an antisocial behavioral disorder present a low to
    31
    moderate risk of committing a contact sex offense.21    The
    expert's earlier evaluation of the defendant in this case,
    conducted before the defendant's guilty pleas and sentencing,
    concluded that, in the expert's opinion, the defendant "would
    not meet the diagnostic criteria as codified in the Diagnostic
    and Statistical Manual of Mental Disorders, Fifth
    Edition[,] . . . for a mental disorder that is paraphilic in
    nature."   After his evaluation, the expert determined that the
    defendant was "not a significant sexual offense recidivism risk
    (contact or non-contact sexual offenses) going forward in time."
    The Commonwealth's expert testified similarly as to the absence
    of this type of mental disorder.
    Evidence produced at the hearing showed that the defendant
    spent approximately sixteen months on pretrial supervision.
    Throughout that time, of which approximately the first five
    months were spent on GPS monitoring, the defendant did not
    violate any condition of his pretrial supervision.     The
    21We observe that some courts in other jurisdictions have
    considered the question of categorical treatment of all sex
    offenders as a homogeneous group, for purposes of issues such as
    treatment, GPS monitoring, and risk of recidivism, and have
    concluded that a categorical approach may be inappropriate. The
    United States Court of Appeals for the Ninth Circuit, for
    example, noted that "failure to distinguish between contact and
    possession-only offenders . . . may go against the grain of a
    growing body of empirical literature indicating that there are
    significant . . . differences between these two groups." United
    States v. Apodaca, 
    641 F.3d 1077
    , 1083 (9th Cir.), cert. denied,
    
    565 U.S. 901
     (2011).
    32
    defendant's compliance, for sixteen months, with the terms of
    his pretrial probation would have provided no suggestion at
    sentencing that he would fail to comply with the terms of
    probation after being sentenced.   When a second hearing was held
    to assess the reasonableness of the GPS monitoring condition,
    after the defendant had been on posttrial GPS monitoring for
    approximately nine months, the defendant had not violated the
    terms of his probation.
    We emphasize that the defendant's circumstances differ
    substantially from cases in other jurisdictions where GPS
    monitoring of a sex offender has been upheld as a reasonable
    search.   For instance, in Belleau, 811 F.3d at 931, GPS
    monitoring was deemed to constitute a reasonable search where a
    defendant had sexually assaulted young children and was
    determined to suffer from a mental disorder that made "it likely
    that [the defendant would] engage in one or more acts of sexual
    violence" (citation omitted).   Statutorily mandated GPS
    monitoring also has been deemed reasonable where it is
    applicable only to individuals assigned to the "most severe"
    risk assessment tier, who have committed crimes such as rape and
    sexual abuse of a child under age thirteen.   See Doe v. Coupe,
    
    143 A.3d 1266
    , 1270, 1279 (Del. Ch. 2016), aff'd, 
    158 A.3d 449
    (Del. 2017).
    33
    The Commonwealth asserts that GPS monitoring facilitates
    the probationary goals both of rehabilitation and of protection
    of the public.   Rehabilitation of the probationer and protection
    of the public are "distinct [goals of probation], because a
    probation condition that protects the public from the defendant
    may not advance the likelihood of his rehabilitation."     Goodwin,
    
    458 Mass. at
    15–16.   See Eldred, 480 Mass. at 95; Griffin, 
    483 U.S. at 875
    .   In this case, however, the Commonwealth's
    purported reasons for imposing GPS monitoring are insufficient.
    See Landry, 429 Mass. at 348.
    The Commonwealth contends that, generally, GPS monitoring
    can promote compliance with the terms of probation by verifying
    that a defendant lives at the address he provides to the
    probation service every fourteen days.   GPS monitoring also
    might verify that the defendant is going to work as he should
    be, and is completing any rehabilitative programs; it also
    otherwise might serve as "concrete proof that a probationer is
    doing well on probation."   Although such verification well may
    be possible in theory, capacity constraints and existing
    monitoring protocols indicate that GPS monitoring is not
    currently used in this manner.   The motion judge determined that
    "[l]aw enforcement is only accessing [GPS] collected
    information when it might reveal what a probationer
    was doing during a specific moment in time where there
    is reason to believe that a sex offender may be
    involved in a probation violation (viz., when an alert
    34
    issues); or, less frequently, when a crime has been
    committed in a geographic area that suggests a
    probationer may have been involved" (emphasis in
    original).
    In its amicus brief, the probation service confirms this method
    of operation, and asserts that it "monitors GPS by investigating
    and responding to 'alerts.'"   Thus, in the circumstances of this
    case, the Commonwealth has not established how the condition of
    GPS monitoring assists in the defendant's rehabilitation.22   See
    T.L.O., 
    469 U.S. at 341
    , quoting Terry, 
    392 U.S. at 20
     (to
    assess whether search is reasonable, we "consider 'whether
    the . . . action was justified at its inception'; . . . [and]
    whether the search as actually conducted 'was reasonably related
    in scope to the circumstances which justified the interference
    in the first place'").
    The Commonwealth asserts also that GPS monitoring "furthers
    the substantial government interest in protecting the public,
    especially children."    The motion judge described several
    hypothetical situations in which he believed that GPS monitoring
    might deter at least some sex offenders, including online
    noncontact sex offenders, from recidivism.   The judge explained
    that,
    22As the probation service notes, a judge conceivably might
    impose curfews at progressively later hours over time, using GPS
    monitoring as an incentive, to serve rehabilitative ends. In
    this case, however, because the defendant has no curfew, GPS
    monitoring cannot serve curfew-related rehabilitative purposes.
    35
    "because the [ELMO] system is collecting location data
    in an undifferentiated manner, law enforcement can
    examine a GPS device's points after a given crime has
    been committed, and thereby determine if the subject
    probationer was at the scene at the time of such
    crime's commission. Thus, while an alert will not
    necessarily issue in real time whenever a probationer
    happens to pass within 300 feet of a park, school or
    day care center -- which would create an obvious
    problem of over-alerting, given the ubiquity of these
    venues in the modern city -- the ability of law
    enforcement to connect a probationer to a particular
    site post hoc means that GPS is both a useful tool of
    crime detection and a deterrent to crimes a given
    probationer might otherwise be tempted to commit"
    (emphasis in original; footnote omitted).
    Where, as here, a defendant's exclusion zones have not been
    entered into the ELMO monitoring system, however, and where, as
    the judge found, even if it were feasible, doing so "would
    create an obvious problem of over-alerting, given the ubiquity
    of these venues in the modern city," GPS monitoring's deterrent
    potential appears linked primarily to its possible post hoc
    investigative use.   As stated, the Commonwealth has not put
    forth sufficient evidence to suggest that this particular
    defendant would be reasonably likely to violate the terms of his
    probation absent the deterrent effect of GPS monitoring, or that
    such post hoc investigative use may become necessary.   The
    absence of evidence demonstrating a risk of recidivism anchored
    in facts related to this particular defendant tilts the balance
    against concluding that GPS monitoring is a reasonable search.
    36
    In these circumstances, the government interests do not outweigh
    the privacy infringement occasioned by GPS monitoring.
    3.   Conclusion.   The matter shall be remanded to the
    Superior Court for entry of a modified order of probation that
    does not include GPS monitoring.
    So ordered.