Commonwealth v. Molina , 476 Mass. 388 ( 2017 )


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    SJC-12022
    COMMONWEALTH   vs.   JOSUE MOLINA.
    Suffolk.       October 6, 2016. - February 7, 2017.
    Present:   Gants, C.J., Botsford, Lenk, Hines, Gaziano, Lowy, &
    Budd, JJ.
    Obscenity, Child pornography, Dissemination of matter harmful to
    minor. Constitutional Law, Search and seizure,
    Confrontation of witnesses. Search and Seizure, Warrant,
    Computer. Evidence, Information stored on computer,
    Intent. Subpoena. Intent. Practice, Criminal, Subpoena,
    Restitution, Confrontation of witnesses. Restitution.
    Indictments found and returned in the Superior Court
    Department on August 27, 2012.
    A pretrial motion to suppress evidence was heard by
    Mitchell H. Kaplan, J.; the cases were heard by Brian A. Davis,
    J., and a motion for restitution was considered by him.
    The Supreme Judicial Court granted an application for
    direct appellate review.
    Ethan C. Stiles for the defendant.
    Ryan E. Ferch, Assistant Attorney General (Nancy Ruthstein,
    Assistant Attorney General, also present) for the Commonwealth.
    2
    BOTSFORD, J.     The defendant, Josue Molina, appeals from his
    child pornography convictions under G. L. c. 272, §§ 29B and
    29C, on three grounds.    First, he argues that the search warrant
    for the apartment in which he was living was overbroad as to
    places and things to be searched.    We disagree, concluding that
    the search warrant was appropriately particularized.      Second,
    the defendant challenges the validity of the administrative
    subpoena that issued under G. L. c. 271, § 17B, for Internet
    service records; he argues that the subpoena, to be
    constitutional, could only be issued based on a showing of
    probable cause.    We similarly reject this argument.   Finally,
    the defendant argues that the Commonwealth failed to prove that
    he had the lascivious intent necessary to support a conviction
    under G. L. c. 272, § 29B (§ 29B).    Although we agree with the
    defendant that lascivious intent is required to be proved with
    respect to every type of conduct proscribed by § 29B, we
    conclude that this requirement was met in this case.      We affirm
    the defendant's convictions.
    The Commonwealth cross-appeals, arguing that it is entitled
    to a restitution hearing in this case, and that the victim for
    whom the Commonwealth seeks restitution is not required as a
    matter of law to appear and testify in order to protect the
    defendant's constitutional right of confrontation.      We agree,
    and remand for the requested restitution hearing.
    3
    1.   Background.1   a.   File-sharing.   The dissemination of
    child pornography is facilitated by free "peer-to-peer" file-
    sharing programs, which allow users to directly connect to other
    users' computers in order to search and download files shared by
    other users.   See United States v. McLellan, 
    792 F.3d 200
    , 205
    (1st Cir.), cert. denied, 
    136 S. Ct. 494
    (2015).     Ares is one
    such file-sharing program, freely available to the general
    public for download.    Ares requires users to accept a license
    agreement explaining that any files stored in the program's
    default download location, called "My Shared Folder," are
    accessible to other users.    Users may move downloaded files out
    of this default folder and save them elsewhere, beyond the reach
    of other Ares users.
    Another version of the Ares program, known as Roundup Ares,
    is available only to law enforcement.    By conducting searches
    using Roundup Ares of terms commonly associated with child
    pornography, a law enforcement investigator can generate the
    1
    This background section is based on the testimony of the
    witnesses at the jury-waived trial in this case. Although not
    explicitly credited in the judge's oral findings at the end of
    the trial, the testimony we summarize was uncontroverted, and it
    is not challenged by the defendant on appeal. With respect to
    Internet file-sharing and the Ares program in particular, the
    search warrant application at issue in this case had attached to
    it a printed explanation entitled "Peer to Peer (P2P) File
    Sharing & the Ares Network" that provided information consistent
    with the trial testimony summarized here. The warrant
    application with attachments was admitted without objection as
    an exhibit at trial.
    4
    Internet protocol (IP) addresses2 of program users sharing
    suspected files of child pornography.    Every computer file has a
    unique identifier known as a "secure hash algorithm" (hash
    value).   Composed of thirty-two characters, hash values are like
    "digital fingerprints" allowing law enforcement agencies to
    recognize files previously identified as child pornography.     See
    Commonwealth v. Martinez, 476 Mass.      ,     & n.1 (2017).
    b.   Facts.   On March 12, 2012, State police Trooper Michael
    Murphy conducted a search for child pornography by accessing the
    Roundup Ares program.    His search indicated that a computer
    associated with the IP address 108.49.7.93 might then be sharing
    2
    An Internet protocol (IP) address is a string of numbers
    identifying a point of network entry to the Internet, at a
    specific date and time, to enable the routing of Internet
    traffic. See Internet Assigned Numbers Authority, Glossary of
    Terms, http://www.iana.org/glossary [https://perma.cc/S55N-
    Z9MB]; United States v. Kearney, 
    672 F.3d 81
    , 84 n.1, 89-90 &
    n.6 (1st Cir. 2012). An IP address does not "identify an exact
    physical location, only an electronic destination on the
    Internet." Mackey, Schoen, & Cohn, Electronic Frontier
    Foundation, Unreliable Informants: IP Addresses, Digital Tips
    and Police Raids 5 & nn.4-6 (Sept. 2016), available at
    https://www.eff.org/files/
    2016/09/22/2016.09.20_final_formatted_ip_address_white_paper_
    0.pdf [https://perma.cc/Y42U-C5TG] (EFF, Unreliable Informants).
    It is possible to link an IP address to a particular physical
    location at a particular point in time through information
    supplied by an Internet service provider (ISP), because when a
    subscriber purchases Internet service from an ISP, the ISP
    assigns a unique IP address to the subscriber at a particular
    physical address supplied by the subscriber. See Commonwealth
    v. Martinez, 476 Mass.     ,    (2017); Commonwealth v. Anthony,
    
    451 Mass. 59
    , 62 & n.3 (2008). See also United States v.
    McLellan, 
    792 F.3d 200
    , 213-214 (1st Cir.), cert. denied, 136 S.
    Ct. 494 (2015).
    5
    child pornography files.   By connecting directly to that
    computer, Murphy was able to view a list of the files in its
    shared folder.   Among the listed file titles, Murphy recognized
    terms commonly associated with child pornography and proceeded
    to download two complete video files.   He viewed both and
    determined that they depicted child pornography, specifically,
    nude prepubescent females engaged in sexual conduct.
    In order to identify the account holder associated with the
    IP address, at Murphy's request, the district attorney for the
    Essex district sent an administrative subpoena to Verizon
    Internet Services, Inc. (Verizon), pursuant to G. L. c. 271,
    § 17B.   Verizon responded, indicating that IP address
    108.49.7.93 was associated with a subscriber named "Hermes
    Delcid" at a certain address in Revere (apartment).      Murphy then
    referred the investigation to the cyber crime division in the
    office of the Attorney General.
    As a member of that division, State police Trooper Daniel
    Herman conducted physical surveillance of the apartment, and
    observed outside the house a mailbox with five names on it,
    including Delcid's (and also including the defendant's).      Herman
    performed as well a check of registry of motor vehicles records,
    which confirmed that address as Delcid's apartment.      Based on
    this information, on April 2, 2012, State police Trooper Mark
    Walsh, also of the Attorney General's cyber crime division,
    6
    applied for and obtained a warrant to search the apartment and
    in particular for the following:   electronic devices containing
    evidence of child pornography; evidence of child pornography in
    any other format; evidence of use, control, ownership, or access
    to the Verizon Internet account of Delcid at that address;
    evidence of ownership, access, or control of the peer-to-peer
    network that was operating with IP address 108.49.7.93; evidence
    of custody or control of the apartment; and evidence of use,
    control, ownership, possession, or access to electronic devices
    at the apartment.   Walsh's supporting affidavit detailed his
    experience, summarized the investigation, and provided
    background information on peer-to-peer file sharing and the Ares
    file-sharing program.   See note 
    1, supra
    .   The search warrant
    authorized the search of the apartment described without naming
    any person to be searched.
    State police officers executed the search warrant on the
    morning of April 4, 2012; some officers proceeded into the
    apartment while others remained in the driveway.    Inside the
    apartment, the officers found Delcid, his wife, and a small
    child.   Forensic examiner Mark Scichilone3 "previewed" a computer
    located in the living room and belonging to Delcid, but excluded
    it from further search when his preliminary review yielded no
    3
    Mark Scichilone worked in the Attorney General's computer
    forensics laboratory.
    7
    files consistent with child pornography.   In a bedroom later
    identified as the defendant's, officers observed the Ares
    program operating on an open laptop computer.4   Scichilone
    photographed the computer screen, which showed downloads and
    uploads of child pornography files in progress from and to other
    computers.
    In the driveway, officers observed an idling motor vehicle
    with someone sitting in the front passenger seat.   State police
    Lieutenant Steven Fennessy approached the vehicle and spoke to
    its occupant, who was the defendant.   After being informed by
    Fennessy that he was not under arrest, the defendant stated that
    he lived in the apartment,5 that he owned a laptop computer
    located in his bedroom at the front of the apartment, and that
    he used the Ares program.   In response, Fennessy advised the
    defendant of the Miranda rights, and the defendant stated that
    he was willing to continue the conversation.
    At that point, Fennessy and the defendant moved to an
    unmarked police vehicle, where the defendant signed a Miranda
    4
    The laptop computer was sitting on top of a desktop
    computer and attached to an external hard drive, both of which
    were also seized.
    5
    The defendant shared the apartment with several roommates
    including Hermes Delcid. The record is unclear as to leasing
    arrangements for the unit or relationships among its occupants,
    but the parties stipulated that the defendant's bedroom was
    generally understood to be his own.
    8
    waiver form and the rest of the interview was recorded.   The
    defendant admitted to being interested in child pornography and
    to having downloaded about twenty such video recordings, and
    cited several search terms he had used.   He estimated that he
    had been downloading child pornography for about five years, and
    recalled having previously used another file-sharing program on
    the desktop computer in his room.   He further stated that he
    owned an external hard drive.   The defendant characterized child
    pornography as "when underage or any kids, they record it and
    it's like sex abuse basically;" he estimated the age of the
    girls depicted in recent downloads to be about nine.   He denied
    knowing any of the children depicted or having ever sexually
    abused any children.   The defendant was then arrested.
    The State police search team seized numerous electronic
    devices from the apartment, including the defendant's laptop and
    desktop computers and his external hard drive.6   The hard drive
    from the laptop computer contained the Ares program; a large
    majority of files downloaded through the file-sharing feature of
    the program contained terms associated with child pornography.
    Six files in the shared folder were confirmed to contain child
    6
    The return of the search warrant lists seventeen entries.
    Of these, eight entries appear to relate to computers or hard
    drives, five appear to relate to data storage (flash drives and
    compact discs), and four appear to relate to nonelectronic items
    (notes, receipts, and packaging).
    9
    pornography.   The laptop and desktop computers and the external
    hard drive revealed over one hundred files containing suspected
    child pornography.    An analyst employed by the Attorney General
    previewed a sample of the video recordings on each device; the
    samples contained child pornography.     The devices were also
    found to include one of the files Murphy had downloaded during
    his Roundup Ares surveillance on March 12, 2012, and remnants of
    the other.
    c.     Procedural history.   On August 27, 2012, a grand jury
    indicted the defendant on one count of possession of child
    pornography with the intent to disseminate in violation of
    § 29B, one count of dissemination of child pornography in
    violation of § 29B, and three counts of possession of child
    pornography in violation of G. L. c. 272, § 29C.     The defendant
    filed a motion to suppress the electronic evidence seized from
    the apartment as well as his statements.     After a nonevidentiary
    hearing, a judge in the Superior Court (motion judge) denied the
    motion.    The defendant was tried jury-waived before a different
    Superior Court judge (trial judge) and was found guilty of all
    charges.   The Commonwealth moved for restitution for harm to a
    victim, but the trial judge denied the motion without a hearing
    and thereafter denied the Commonwealth's motion to reconsider.
    The defendant filed a timely notice of appeal from his
    10
    convictions, and the Commonwealth also filed a notice of appeal.7
    We granted the defendant's application for direct appellate
    review.
    2.   Discussion.   a.   Overbreadth of the search.   The
    defendant argues that the search warrant was impermissibly
    overbroad, as to both places and "things" to be searched.       It is
    a given that under the Fourth Amendment to the United States
    Constitution and art. 14 of the Massachusetts Declaration of
    Rights, probable cause, necessary for the issuance of a search
    warrant, requires a substantial basis for concluding that the
    items sought are related to the criminal activity under
    investigation, and that they reasonably may be expected to be
    located in the place to be searched at the time the search
    warrant issues.   Commonwealth v. Kaupp, 
    453 Mass. 102
    , 110
    (2009), and cases cited.     In addition, under the Fourth
    Amendment, warrants must "particularly describ[e] the place to
    be searched, and the persons or things to be seized," and art.
    14 requires warrants to be "accompanied with a special
    7
    The defendant argues that the Commonwealth filed its
    appeal one day late, and that the court therefore lacks
    jurisdiction to entertain it. We agree with the Commonwealth
    that the docket entries are not entirely clear, but assuming the
    notice of appeal was filed one day late, we extend the time for
    filing the Commonwealth's notice of appeal by one day pursuant
    to Mass. R. A. P. 2, 
    365 Mass. 845
    (1974), and Mass. R. A. P.
    14 (b), as amended, 
    378 Mass. 939
    (1979), and therefore treat
    the Commonwealth's notice of appeal as timely filed.
    11
    designation of the persons or objects of search, arrest, or
    seizure."   See G. L. c. 276, § 2 (search warrants "shall
    particularly describe the property or articles to be searched
    for").    By defining and limiting the scope of the search, these
    constitutional and statutory particularity requirements prohibit
    general warrants amounting to "exploratory rummaging in a
    person's belongings."    Coolidge v. New Hampshire, 
    403 U.S. 443
    ,
    467 (1971).   See Commonwealth v. Pope, 
    354 Mass. 625
    , 629
    (1968).   A warrant lacking the requisite particularity may thus
    be challenged as overbroad.
    In reviewing a finding of probable cause, the affidavit
    supporting the warrant should be interpreted "in a commonsense
    and realistic fashion," and "read as a whole, not parsed,
    severed, and subjected to hypercritical analysis" (citations
    omitted).   
    Kaupp, 453 Mass. at 111
    .      An inference drawn from the
    affidavit, "if not forbidden by some rule of law, need only be
    reasonable and possible; it need not be necessary or
    inescapable" (citation omitted).    
    Id. A reviewing
    court gives
    considerable deference to a magistrate's determination of
    probable cause.   Commonwealth v. Anthony, 
    451 Mass. 59
    , 69
    (2008).    Because such a determination is a conclusion of law,
    however, we review it de novo.     Commonwealth v. Foster, 
    471 Mass. 236
    , 242 (2015).
    12
    i.   Place to be searched.   The defendant argues that where,
    as here, the apartment was shared living space, a search warrant
    for the entire apartment was overbroad.    The Fourth Amendment
    "protects people, not places" against unreasonable searches and
    seizures, Katz v. United States, 
    389 U.S. 347
    , 351 (1967), but
    just the same, warrants authorize the searches of particular
    places, and do so properly wherever there is a sufficient nexus
    between the items sought and the place to be searched.
    Commonwealth v. McDermott, 
    448 Mass. 750
    , 768, cert. denied, 
    552 U.S. 910
    (2007).   That nexus may be based on the type of crime,
    the nature of the missing items, the extent of the suspect's
    opportunity for concealment, and normal inferences as to where a
    criminal would be likely to hide evidence of the crime.    
    Id. "[T]he degree
    of specificity required when describing the goods
    to be seized may necessarily vary according to the circumstances
    and type of items involved."   Commonwealth v. Freiberg, 
    405 Mass. 282
    , 298 (1989), cert. denied, 
    493 U.S. 940
    (1989).
    Here, the warrant established a sufficient nexus,
    articulated with adequate particularity.    The defendant argues
    that the police "knew next to nothing of the people and
    computing devices" inside the apartment to be searched.    His
    emphasis on people, however, is misguided where the warrant
    appropriately substantiated a connection between the apartment
    and the evidence of child pornography reasonably expected to be
    13
    located therein.    Zurcher v. Stanford Daily, 
    436 U.S. 547
    , 556 &
    n.6 (1978) ("The critical element in a reasonable search is not
    that the owner of the property is suspected of crime but that
    there is reasonable cause to believe that the specific 'things'
    to be searched for and seized are located on the property to
    which entry is sought").    See Martinez, 476 Mass. at     ,    .
    It is true that the police were aware prior to the search
    that the Verizon subscriber was not the apartment's sole
    occupant:   there were five names on the apartment's mailbox.
    The search warrant, however, authorized a search of the location
    associated with the IP address, not a search of any single
    associated subscriber.     Although IP addresses alone can be
    unreliable indicators of location,8 they suffice when
    corroborated by the Internet service provider (ISP), as occurred
    here.    See United States v. Grant, 
    218 F.3d 72
    , 75 (1st Cir.),
    cert. denied, 
    531 U.S. 1025
    (2000) (IP address corroborated by
    ISP supported probable cause).    That reliability may be further
    strengthened by police surveillance, which here confirmed the
    connection between the IP address and the physical location when
    officers observed the ISP subscriber's name on the apartment's
    8
    See United States v. Vosburgh, 
    602 F.3d 512
    , 527 & n.14
    (3d Cir. 2010), cert. denied, 
    563 U.S. 905
    (2011)
    (characterizing IP addresses as "fairly 'unique' identifiers,"
    but cautioning that "there undoubtedly exists the possibility of
    mischief and mistake"). See EFF, Unreliable Informants, supra
    at 8-10.
    14
    mailbox.   See 
    McLellan, 792 F.3d at 211
    n.9, quoting United
    States v. Gillman, 432 Fed. Appx. 513, 515 (6th Cir. 2011)
    (finding sufficient nexus between illegality and defendant's
    apartment where "(1) child pornography was transferred to police
    from a specific IP address; (2) that IP address was registered
    to the defendant's residential address; and (3) the defendant
    actually lived at that address").9
    The search was indeed limited to the apartment.   Within the
    apartment, however, the search was limited not to areas under
    Delcid's exclusive control but rather to those associated with
    the IP address.   Cf. Commonwealth v. Dew, 
    443 Mass. 620
    , 626
    (2005) (search warrant for entire multifamily home not overbroad
    where defendant had access to all units).   Just as evidence
    could have been anywhere in an entire house to which the
    defendant had access in Dew, so here could computer devices
    using the monitored IP address be anywhere in the apartment.
    9
    Many Federal Circuit Courts of Appeals have held that a
    corroborated IP address provides sufficient probable cause for a
    search warrant of the associated physical address to issue. See
    United States v. Chiaradio, 
    684 F.3d 265
    , 279 (1st Cir.), cert.
    denied, 
    133 S. Ct. 589
    (2012); United States v. Renigar, 
    613 F.3d 990
    , 991, 994 (10th Cir. 2010); 
    Vosburgh, 602 F.3d at 526
    –
    527; United States v. Stults, 
    575 F.3d 834
    , 843-844 (8th Cir.
    2009), cert. denied, 
    559 U.S. 915
    (2010); United States v.
    Perrine, 
    518 F.3d 1196
    , 1205-1206 (10th Cir. 2008); United
    States v. Pérez, 
    484 F.3d 735
    , 740 (5th Cir.), cert. denied, 
    552 U.S. 952
    (2007); United States v. Wagers, 
    452 F.3d 534
    , 539 (6th
    Cir.), cert. denied, 
    549 U.S. 1032
    (2006); United States v. Hay,
    
    231 F.3d 630
    , 635–636 (9th Cir. 2000), cert. denied, 
    534 U.S. 858
    (2001).
    15
    Where the defendant's unlocked bedroom showed no indicia of
    separate ownership from the rest of the apartment, a search of
    that bedroom as part of the physical address associated with the
    IP address was proper.
    ii.     Things to be searched.   Molina further contends that
    the warrant was overbroad in allowing police to seize "all
    computing devices found in the apartment regardless to whom they
    belonged or where they may have been found."     The argument
    fails.    The information available to the police was that
    suspected child pornography was being sent and received through
    a computer device connected to IP address 108.49.7.93 and that
    that IP address was assigned to a subscriber at the apartment.
    As discussed above, the warrant properly permitted a search of
    the entire physical location associated with the target IP
    address for any evidence (computers and related items) of child
    pornography.   Because that evidence, in the form of electronic
    files, could be easily transferred between devices at the same
    location, police need not have limited the devices to be
    searched.   See 
    McDermott, 448 Mass. at 770
    (warrant seeking
    evidence of defendant's mental state not overbroad where police
    "did not have information that would allow them further to limit
    16
    the description of this category of items").10   Where evidence of
    child pornography could thus have existed on any or all
    electronic devices at the location associated with the target IP
    address, the seizure of over a dozen electronic devices found in
    the apartment did not exceed the warrant's scope.
    iii.   Minimization protocol.   Although we conclude that
    there was probable cause to justify the search of the apartment
    in this case, the execution of the search warrant must itself
    satisfy the "ultimate touchstone" of reasonableness.   See
    Commonwealth v. Entwistle, 
    463 Mass. 205
    , 213 (2012), cert.
    denied, 
    133 S. Ct. 945
    (2013).   The defendant does not squarely
    10
    See also United States v. Ivers, 430 Fed. Appx. 573, 575
    (9th Cir.), cert. denied, 
    132 S. Ct. 337
    (2011) (scope of
    warrant proper where, although police could have provided more
    specific description of items sought, they "had no way of
    knowing where the images were stored" [citation omitted]);
    United States v. Upham, 
    168 F.3d 532
    , 535 (1st Cir. 1999)
    (warrant limiting search of entire home to "[a]ny and all
    computer software and hardware, . . . computer disks, disk
    drives . . . [a]nd any and all visual depictions, in any format
    or media, of minors engaging in sexually explicit conduct"
    sufficiently particular because search and seizure of computer
    and all available disks was "narrowest definable [one]
    reasonably likely to obtain images"); United States v. Clark,
    
    524 F. Supp. 2d 896
    , 901 (W.D. Mich. 2006), aff'd, 257 Fed.
    Appx. 991 (6th Cir. 2007), cert. denied, 
    555 U.S. 829
    (2008)
    (warrant limiting search of entire home in which defendant
    rented room to "[c]hild pornography in any form including . . .
    computer printed images," and limiting search of computer hard
    drives and other storage media to "evidence . . . related to
    child pornography," was as specific as it could have been, given
    that defendant could have stored files containing child
    pornography almost anywhere on his computer or other storage
    media); United States v. Albert, 
    195 F. Supp. 2d 267
    , 276 (D.
    Mass. 2002) (similar).
    17
    challenge the scope or reasonableness of the search of his
    electronic devices or his digital files once police had seized
    the devices, nor does he suggest that police should be required
    to develop and implement a minimization protocol to govern the
    execution of any such digital search.   We note, moreover, that
    in this case the police and associated personnel conducting the
    search promptly, and commendably, screened and excluded at least
    Delcid's computer from further search or seizure; it also
    appears that when the seized electronic devices were seized
    thereafter, the personnel conducting the searches did so by
    searching for file names containing terms commonly associated
    with child pornography in order to preview only a limited sample
    of files consistent with those terms.
    On the record before us in this case, nothing indicates
    that execution of the search in this case was unreasonable.
    Nevertheless, the fact that the target apartment appeared to be
    the residence of multiple individuals11 is significant.   Where,
    as the search warrant return in this case indicates, multiple
    electronic devices that may well belong to multiple individuals
    are seized and searched, the reasonableness of the undertaking
    11
    The police knew from the surveillance they conducted
    before applying for the search warrant that the target apartment
    had a mailbox with five different names on it, and when the
    police entered the apartment, we infer that it was quite obvious
    that more than Delcid and his family were living there.
    18
    will be judged, at least in part, by whether the searches of
    those devices are conducted in a manner that seeks to limit the
    scope of the search as much as practicable in the particular
    circumstances.   In the future, we may consider whether to
    require, as some courts have, a digital search protocol that
    would affirmatively demonstrate "a high regard for rights of
    privacy and take all measures reasonable to avoid unnecessary
    intrusion."   Commonwealth v. Vitello, 
    367 Mass. 224
    , 262 (1975).
    Compare United States v. Galpin, 
    720 F.3d 436
    , 451 (2d Cir.
    2013) (declining to require "specific search protocols or
    minimization undertakings as basic predicates for upholding
    digital search warrants"), with United States v. Comprehensive
    Drug Testing, Inc., 
    621 F.3d 1162
    , 1176–1177 (9th Cir. 2010) (en
    banc) (per curiam) (requiring minimization protocol).
    In the McDermott case, we explained that no advance
    approval was required for computer search methods because the
    magistrate issuing the warrant "likely does not have the
    technical expertise to assess the propriety of a particular
    forensic analysis."   
    McDermott, 448 Mass. at 776
    .   It is for
    precisely this reason, however, that additional guidance at the
    present time would be very useful concerning ways that those
    conducting digital searches can minimize intrusions into the
    private electronic files of individuals who may have no
    connection at all with the child pornography or other suspected
    19
    criminal activity being investigated.    Nearly a decade's worth
    of technological advancements have taken place since this court
    decided McDermott, and as was clear at oral argument in this
    case, we are concerned about the lack of protocols or formal
    guidelines for executing search warrants for digital evidence.
    Cf. Kerr, Executing Warrants for Digital Evidence:    The Case for
    Use Restrictions on Nonresponsive Data, 48 Tex. Tech. L. Rev. 1,
    17-18 (2015) ("The best way to minimize the unwarranted
    intrusions upon privacy for computer searches is to impose use
    restrictions on the nonresponsive data revealed in the course of
    the search").   The Attorney General's existing digital evidence
    guide offers helpful parameters,12 and we invite the Attorney
    General to develop further guidance for the conduct of digital
    searches that could be made available to both State and local
    officers conducting digital searches.
    b.   Administrative subpoena.   Pursuant to G. L. c. 271,
    § 17B (§ 17B), a district attorney may issue an administrative
    subpoena for the records of an ISP "whenever [he or she] has
    reasonable grounds to believe that [those records] are relevant
    and material to an ongoing criminal investigation."    This
    statute is to be read in conjunction with the Federal Stored
    12
    See Office of the Attorney General, Massachusetts Digital
    Evidence Guide (June 9, 2015), available at
    http://www.mass.gov/ago/docs/cybercrime/ma-digital-evidence-
    guide.pdf [https://perma.cc/C9XJ-NAYC].
    20
    Communications Act (SCA), 18 U.S.C. §§ 2701-2711 (2012).       See
    G. L. c. 271, § 17B (permitting subpoenas "[e]xcept as otherwise
    prohibited under [18 U.S.C. § 2703]").      The SCA requires
    subpoenaed providers to disclose a subscriber's name, address,
    telephone connection records (including session times and
    durations), length and type of service, network address, and
    payment source.   18 U.S.C. § 2703(c)(2).
    The defendant challenges the validity of the administrative
    subpoena sent by the district attorney to Verizon in this case,
    arguing that it could only be sent if supported by probable
    cause, and that the § 17B standard requiring only a showing that
    the records sought are "relevant and material to an ongoing
    criminal investigation" was constitutionally insufficient.
    Accordingly, he claims, because the administrative subpoena was
    invalid, the invalidity applied as well to the search warrant
    because probable cause for it was supported in part by
    information obtained through this subpoena, requiring the
    reversal of his conviction.
    Assuming, without deciding, that the defendant has standing
    to challenge the administrative subpoena for Delcid's Verizon
    subscriber records, we reject the defendant's contention that
    the issuance of such a subpoena requires probable cause.
    Previous decisions of this court have reviewed and upheld the
    constitutional validity of the "relevant and material" standard
    21
    contained in § 17B, at least as applied to certain types of
    telephone records.     See Commonwealth v. Vinnie, 
    428 Mass. 161
    ,
    178, cert. denied, 
    525 U.S. 1007
    (1998), adopting reasoning of
    Commonwealth v. Feodoroff, 
    43 Mass. App. Ct. 725
    , 729-730
    (1997).   Section 17B specifically prohibits disclosure of the
    contents of subscriber communications, including Internet
    browser history.     G. L. c. 271, § 17B.13   Here, however, the
    subscriber information reveals substantially less than the
    telephone records we have said permissibly could be subpoenaed.
    See Commonwealth v. Chamberlin, 
    473 Mass. 653
    , 658 (2016);
    
    Vinnie, supra
    .   At least on the facts of this case, we continue
    to think that for the limited scope of information obtained
    pursuant to § 17B, the requirements of art. 14 were satisfied by
    the statute's requirement that the requestor have reasonable
    grounds to believe the records are relevant and material to an
    ongoing criminal investigation.
    Because we have rejected the defendant's challenges to the
    search warrant -- the overbreadth challenge as well as the
    13
    Specifically, the relevant text of G. L. c. 271, § 17B,
    provides: "No subpoena issued pursuant to this section shall
    demand records that disclose the content of electronic
    communications or subscriber account records disclosing internet
    locations which have been accessed including, but not limited
    to, websites, chat channels and newsgroups, but excluding
    servers used to initially access the internet. No recipient of
    a subpoena issued pursuant to this section shall provide any
    such content or records accessed, in response to such subpoena."
    22
    challenge to the supporting information obtained through the
    § 17B administrative warrant -- we affirm the motion judge's
    order denying the defendant's motion to suppress evidence
    obtained in the search of the apartment.14
    c.   G. L. c. 272, § 29B:   proof of lascivious intent
    requirement.   Molina contests the sufficiency of the evidence
    supporting his conviction of possession of child pornography
    with the intent to disseminate under § 29B (b).    He argues that
    the Commonwealth failed to prove that he had the lascivious
    intent he claims is required to be proved as an element of the
    crime.    The Commonwealth responds that proof of lascivious
    intent is not necessary to convict a defendant of possession
    with intent to disseminate under § 29B (b), but that in any
    event there was proof of lascivious intent, and indeed proof of
    all the elements of the crime of possession with intent to
    disseminate.   We agree with Molina that lascivious intent must
    be proved to establish any violation of § 29B, including in
    particular possession of child pornography with intent to
    14
    For the same reason, we also affirm the motion judge's
    denial of the defendant's motion to suppress his statements to
    State police Lieutenant Steven Fennessy and other police
    officers as inadmissible fruit of the poisonous tree under Wong
    Sun v. United States, 
    371 U.S. 471
    , 486 (1963). See, e.g.,
    Commonwealth v. Estabrook, 
    472 Mass. 852
    , 860-864 (2015) (only
    statements resulting from exploitation of illegally obtained
    evidence need be suppressed).
    23
    disseminate under § 29B (b), but we disagree that the evidence
    was insufficient to do so here.
    Section 29B has two subsections, the first of which,
    § 29B (a), focuses on child pornography depicting child nudity,
    and the second of which, § 29B (b), addresses child pornography
    depicting children engaging in sexual conduct.   Each subsection
    punishes both acts of dissemination as well as possession with
    intent to disseminate.   Sections 29B (a) and (b) provide in
    relevant part as follows:
    "(a) Whoever, with lascivious intent, disseminates any
    visual material that contains a representation or
    reproduction of any posture or exhibition in a state of
    nudity involving the use of a child who is under eighteen
    years of age, knowing the contents of such visual material
    or having sufficient facts in his possession to have
    knowledge of the contents thereof, or has in his possession
    any such visual material knowing the contents or having
    sufficient facts in his possession to have knowledge of the
    contents thereof, with the intent to disseminate the same,
    shall be punished . . . .
    "(b) Whoever with lascivious intent disseminates any
    visual material that contains a representation or
    reproduction of any act that depicts, describes, or
    represents sexual conduct participated or engaged in by a
    child who is under eighteen years of age, knowing the
    contents of such visual material or having sufficient facts
    in his possession to have knowledge of the contents
    thereof, or whoever has in his possession any such visual
    material, with the intent to disseminate the same, shall be
    punished . . . ." (Emphases added.)
    As used in § 29B, the term "lascivious intent" is defined
    in G. L. c. 272, § 31, to mean "a state of mind in which the
    sexual gratification or arousal of any person is an objective."
    24
    G. L. c. 272, § 31.15   The Commonwealth agrees with the defendant
    that both types of conduct proscribed by § 29B (a) and the
    actual dissemination proscribed by § 29B (b) require lascivious
    intent, but the Commonwealth disputes that the possession with
    the intent to disseminate prohibited by § 29B (b) does so.    In
    the Commonwealth's view, the lascivious intent required for
    15
    The full definition of "lascivious intent" in G. L.
    c. 272, § 31, is the following:
    "'Lascivious intent,' a state of mind in which the
    sexual gratification or arousal of any person is an
    objective. For the purposes of prosecution under this
    chapter, proof of lascivious intent may include, but shall
    not be limited to, the following:
    "(1) whether the circumstances include sexual
    behavior, sexual relations, infamous conduct of a lustful
    or obscene nature, deviation from accepted customs and
    manners, or sexually oriented displays;
    "(2) whether the focal point of a visual depiction is
    the child's genitalia, pubic area, or breast area of a
    female child;
    "(3) whether the setting or pose of a visual depiction
    is generally associated with sexual activity;
    "(4) whether the child is depicted in an unnatural
    pose or inappropriate attire, considering the child's age;
    "(5) whether the depiction denotes sexual
    suggestiveness or a willingness to engage in sexual
    activity;
    "(6) whether the depiction is of a child engaging in
    or being engaged in sexual conduct, including, but not
    limited to, sexual intercourse, unnatural sexual
    intercourse, bestiality, masturbation, sado-masochistic
    behavior, or lewd exhibition of the genitals."
    25
    actual dissemination in the first "whoever" clause of § 29B (b)
    does not also modify the second "whoever" clause that describes
    possession with the intent to disseminate, with the result that,
    in contrast to § 29B (a), possession with the intent to
    disseminate under § 29B (b) does not require proof of lascivious
    intent to establish the crime.16
    We are not persuaded that such a distinction between the
    two subsections can properly rest on the presence of a second
    "whoever" in § 29B (b), and the absence of two commas.    In
    Commonwealth v. Dingle, 
    73 Mass. App. Ct. 274
    , 279 (2008), the
    Appeals Court, reviewing the legislative history of the statute,
    interpreted § 29B (a) and (b) as "describ[ing] different means
    of committing the same offense."    We agree, and based on the
    same legislative history, conclude that the lascivious intent
    requirement applies to all four means of violating the statute
    contained in the two subsections.
    16
    In particular, the Commonwealth asserts that, in
    § 29B (a), the lascivious intent requirement is set off by
    commas and clearly modifies the entire subsection to reach both
    dissemination and possession with the intent to disseminate
    visual material depicting child nudity, but in § 29B (b), the
    absence of commas around the lascivious intent requirement and
    the presence of a second "whoever" indicates that the lascivious
    intent requirement was only intended to apply to dissemination
    of depictions of child sexual acts, and not to possession with
    the intent to disseminate this type of visual material.
    26
    Section 29B was originally enacted in 1977.   See St. 1977,
    c. 917, § 2.   In its original version, the statute did not have
    separate subsections, and provided in relevant part:
    "Whoever disseminates any visual material that
    contains a representation or reproduction of any posture or
    exhibition in a state of nudity or of any act that depicts,
    describes, or represents sexual conduct participated or
    engaged in by a child who is under eighteen years of age,
    knowing the contents of such visual material or having
    sufficient facts in his possession to have knowledge of the
    contents thereof, or whoever has in his possession any such
    visual material knowing the contents or having sufficient
    facts in his possession to have knowledge of the contents
    thereof, with the intent to disseminate the same, shall be
    punished . . . ." (Emphases added.)
    
    Id. As this
    quoted language indicates, the statute combined the
    four means of committing the crime -- dissemination of visual
    material depicting child nudity, dissemination of visual
    material depicting child sexual acts, and possession with the
    intent to disseminate both types of pornographic visual material
    -- in a single section, and there was no lascivious intent
    requirement for any of these means.   In 1988, this court struck
    down a statute closely related to § 29B, G. L. c. 272, § 29A,17
    as unconstitutionally overbroad under the First Amendment to the
    United States Constitution.   Commonwealth v. Oakes, 
    401 Mass. 602
    , 603 (1988), vacated by 
    491 U.S. 576
    (1989).    In response,
    17
    General Laws c. 272, § 29A,   concerns the production of
    visual material depicting children   in a state of nudity or
    engaged in sexual conduct, whereas   § 29B relates to the
    dissemination of such material (or   possession with the intent to
    disseminate).
    27
    the Attorney General presented to the Legislature proposed
    amendments to both §§ 29A and 29B that, among other things,
    separated each section into separate subsections, and added a
    lascivious intent requirement to § 29A (a) and also to § 29B (a)
    and (b).   See St. 1988, c. 226, §§ 1, 2.   It is clear from the
    submissions of the Attorney General that the goal was to correct
    the constitutional overbreadth infirmity that this court in
    Oakes found to invalidate § 29A by adding a lascivious intent
    requirement not only to what became § 29A (a), but also to
    § 29B (a) and (b).   See Memorandum from Assistant Attorney
    General Lila Heideman to Sen. Paul Harold and Rep. James Brett
    (June 21, 1988) (on file with Committee on Criminal Justice)
    (Heideman memorandum).   See also 
    Dingle, 73 Mass. App. Ct. at 280-282
    .   The Legislature enacted the amendments proposed by the
    Attorney General with essentially no substantive changes.     See
    St. 1988, c. 226, § 2; Heideman 
    memorandum, supra
    .    The
    Commonwealth makes much of the second "whoever" in § 29B (b) and
    the absence of the same in § 29B (a).   However, a second
    "whoever" existed in the originally enacted, single-section
    version of § 29B, before the addition of the lascivious intent
    requirement to it, and the legislative history contains nothing
    to indicate that the continued presence of a second "whoever" in
    § 29B (b) but absence in § 29B (a) reflected an intentional
    decision to distinguish between the two subsections in order to
    28
    ensure that lascivious intent was not required for possession
    with the intent to disseminate child pornography depicting child
    sexual acts.      Rather, the legislative history suggests the
    opposite -- that is, as stated previously, an intent on the part
    of the drafters of the 1988 amendment to ensure that lascivious
    intent was an element of all aspects of § 29B (a) and (b).18
    Moreover, to construe § 29B (b) as imposing a proof of
    lascivious intent requirement in relation to the more serious
    and harmful act of actual dissemination, but not to the act of
    possession with the intent to disseminate, seems illogical.      See
    Flemings v. Contributory Retirement Appeal Bd., 
    431 Mass. 374
    ,
    375-376 (2000).     In sum, we construe § 29B to require proof of
    lascivious intent with respect to all four means of committing
    the crime, including possession with the intent to disseminate
    visual material depicting a child engaged in a sexual act under
    § 29B (b).19,20
    18
    This is in contrast to G. L. c. 272, § 29A, where the
    lascivious intent requirement applies solely to § 29A (a) (child
    nudity) but is not mentioned in § 29A (b) (child engaged in
    sexual act).
    19
    We note, as the trial judge did, that both indictments
    charging the defendant with violating § 29B included a reference
    to lascivious intent -- that is, the indictment charging the
    defendant with dissemination of child pornography under
    § 29B (a), as well as the separate one charging possession with
    the intent to disseminate under § 29B (b).
    29
    d.   Sufficiency of the evidence.   The defendant argues that
    there was insufficient evidence to support his convictions of
    dissemination of child pornography and possession of child
    pornography with the intent to disseminate under § 29B (a) and
    (b), respectively.   This argument fails.    For both of the § 29B
    charges, the disputed elements of the offenses boil down to
    whether there was sufficient evidence of (1) lascivious intent;
    and (2) dissemination or possession with the intent to
    disseminate.   Our review of the trial record persuades us that
    there was sufficient evidence to prove beyond a reasonable doubt
    each element of each § 29B charge.
    i.   Evidence of lascivious intent.     The evidence in this
    case showed that the defendant was downloading and uploading --
    i.e., sharing -- files containing children "exhibit[ed] in a
    20
    In Commonwealth v. LeBlanc, 
    475 Mass. 820
    , 822 (2016), we
    considered the significance of seven separate "whoever" clauses
    in G. L. c. 90, § 24 (2) (a), a subsection of the statute
    prohibiting operation of a motor vehicle while under the
    influence of intoxicants. The specific question in that case
    was whether language in the first "whoever" clause requiring
    proof that the defendant was operating on a "public way" should
    be understood also to apply the same "public way" requirement to
    each of the other "whoever" clauses; we concluded that the
    "public way" requirement did not apply to the other clauses.
    
    Id. Section 29B
    (b) is very different in structure and subject
    matter from the statute at issue in the LeBlanc case. It is
    also significant that in contrast to the history of § 29B (b),
    the legislative history of the statute in LeBlanc did not offer
    support for a construction that would apply a public way
    requirement to all the "whoever" clauses, and the statute made
    better sense if the public way requirement did not apply to all
    of the other "whoever" clauses.
    30
    state of nudity" who were "engaging in or being engaged in
    sexual conduct" that included one or more of the acts ("sexual
    intercourse, unnatural sexual intercourse, bestiality,
    masturbation, sado-masochistic behavior, or lewd exhibition of
    the genitals") described in the definition of "lascivious
    intent" set out in   G. L. c. 272, § 31.   See note 
    16, supra
    .
    Given that "lascivious intent" requires proof of "a state of
    mind in which the sexual gratification or arousal of any person
    is an objective" (emphasis added), 
    id., we agree
    with the trial
    judge that the evidence permitted the reasonable inference that
    the defendant had his own sexual gratification as an objective
    in downloading and sharing depictions of children in various
    states of nudity engaged in sexual conduct, and that this
    permissible inference sufficed to permit the judge, as the fact
    finder, reasonably to find proved beyond a reasonable doubt
    lascivious intent in relation to both the dissemination charge
    under § 29B (a) (pornography depicting child nudity) and the
    possession with the intent to disseminate charge under § 29B (b)
    (pornography depicting a child engaged in sexual conduct).
    ii.   Evidence of dissemination and of possession with
    intent to disseminate.   The defendant argues that the evidence
    on dissemination showed only that he had failed to take any
    steps to change the default download folder from the "My Shared
    Folder" to one that was not shared with other Ares program
    31
    users, and that this evidence was insufficient to support a
    conviction for actual dissemination with lascivious intent.      The
    trial judge reasoned that the file-sharing program, displaying
    simultaneous downloads and uploads, and explicitly identified as
    such on the Ares program screen on the defendant's computer,
    provided sufficient evidence to prove the dissemination charge
    under § 29B (a).   We agree.   "When an individual consciously
    makes files available for others to take and those files are in
    fact taken, [knowing] distribution has occurred.   The fact that
    the defendant did not actively elect to transmit those files is
    irrelevant."   United States v. Chiaradio, 
    684 F.3d 265
    , 282 (1st
    Cir.), cert. denied, 
    133 S. Ct. 589
    (2012).
    The same evidence reflecting the actual file-sharing
    activity on the defendant's computer also was sufficient to
    prove the charge of possession with the intent to disseminate:
    in order to disseminate these files containing child
    pornography, by definition the defendant first had to possess
    these files, and the file-sharing activity reflects an intent to
    disseminate.
    e.   Restitution.   The Commonwealth appeals with respect to
    the denial of its request for a hearing on its motion for
    restitution.   The trial judge based his denial of the request
    and related denial of the motion for reconsideration on the
    ground that a hearing on the motion was a necessary prerequisite
    32
    to the motion's allowance, and the defendant's right to due
    process required that, at such a hearing, the victim identified
    by the Commonwealth, referred to by the pseudonym "Vicky,"
    appear and testify.   We disagree, and accordingly remand for a
    hearing at which the victim need not appear.
    The relevant background facts are these.   Following the
    judge's finding of the defendant to be guilty of all charges,
    the Commonwealth requested that as a component of his sentence,
    the defendant be required to make restitution to Vicky, a victim
    of some of the child pornography in the defendant's possession,21
    and requested a hearing to establish the amount of restitution.
    In support of its motion, the Commonwealth filed a memorandum
    accompanied by exhibits, including a sworn victim impact
    statement signed by Vicky, psychological evaluations, and an
    economic analysis of lost wages.   The judge agreed with the
    Commonwealth that Vicky qualified as a victim of the defendant's
    crimes who might be eligible for restitution, but declined to
    hold a restitution hearing because he found that to do so would
    require the victim's presence, and he wanted to spare her that
    21
    The Commonwealth states in its brief that "Vicky" is the
    pseudonym given to the child depicted in some of the defendant's
    computer files of child pornography. The defendant does not
    dispute this statement. The Commonwealth also states, again
    without dispute by the defendant, that Vicky does not live in
    the Commonwealth.
    33
    experience.22   The judge appeared to have concluded that this
    court's decision in Commonwealth v. Denehy, 
    466 Mass. 723
    , 740
    (2014), made Vicky's appearance mandatory.23
    A judge unquestionably has the power to order restitution
    as a condition of probation.   See 
    Denehy, 466 Mass. at 737
    , and
    cases cited.    In a case where restitution is sought, if the
    defendant does not stipulate to the restitution amount, the
    judge should conduct an evidentiary hearing, at which the victim
    may testify regarding the amount of the loss.   Commonwealth v.
    Henry, 
    475 Mass. 117
    , 120 (2016).   A restitution hearing "need
    not be elaborate," but must be "reasonable and fair."
    Commonwealth v. Nawn, 
    394 Mass. 1
    , 7 (1985).    The opportunity to
    22
    Specifically, the judge stated: "A restitution hearing
    is required; and where a restitution hearing is required, in
    circumstances like this, I'm not going to order restitution.
    I'm not doing it because I would not require Vicky to appear in
    this courtroom to testify." His written denial of the motion
    noted, "Restitution would require a hearing at which 'Vicky'
    would be required to appear. . . . The [c]ourt will not subject
    Vicky to that process." Thereafter, in denying the
    Commonwealth's motion for reconsideration, the judge stated that
    he "remain[ed] persuaded that any restitution order in the
    present case would require an evidentiary hearing at which the
    [d]efendant would be entitled to cross-examine Vicky regarding
    her claimed damages."
    23
    In Commonwealth v. Denehy, 
    466 Mass. 723
    , 740 (2014), we
    stated that with respect to restitution, "[t]he Commonwealth
    bears the burden of proving both a causal connection and the
    amount of the loss by a preponderance of the evidence. . . . A
    'unilateral statement' from the victim or, as here, from the
    assistant district attorney about the amount owed may be
    insufficient to meet this burden" (citations omitted).
    34
    cross-examine witnesses is one, but by no means the only,
    measure of such fairness.     See Commonwealth v. Casanova, 
    65 Mass. App. Ct. 750
    , 755-756 (2006) (hearsay, if reliable, is
    admissible to carry Commonwealth's burden at restitution
    hearing).    The hearing must be flexible in nature, and all
    reliable evidence should be considered.     See 
    id. (restitution process
    "should be flexible enough to consider evidence
    including letters, affidavits, and other material that would not
    be admissible in an adversary criminal trial" [citation
    omitted]).
    An order to pay restitution forms part of a criminal
    sentence that includes probation, but a hearing on restitution
    shares some common features with a probation revocation
    proceeding.     See 
    Casanova, 65 Mass. App. Ct. at 755-756
    .    In the
    probation revocation context, strict evidentiary rules are not
    imposed, see Commonwealth v. Durling, 
    407 Mass. 108
    , 114 (1990),
    and the same is true of restitution hearings.     See Casanova,
    supra at 755.    More relevant to the issue raised in the present
    case, however, is the point that in a probation revocation
    hearing, although a defendant has a presumptive right to call
    witnesses, that presumption may be overcome by countervailing
    interests.    See Commonwealth v. Hartfield, 
    474 Mass. 474
    , 481
    (2016).   In particular, in determining whether the
    countervailing interests overcome the presumption after
    35
    considering the totality of the circumstances, the judge
    conducting a restitution hearing should consider whether, based
    on an individualized assessment of the proposed witness, there
    is an unacceptable risk that the witness's physical,
    psychological, or emotional health would be significantly
    jeopardized if the witness were required to testify in court at
    the probation hearing.   See 
    id. These same
    considerations are relevant to a restitution
    hearing, and they support the conclusion that in the restitution
    context a trial judge possesses the discretionary authority not
    to require a victim such as Vicky to appear as a witness, and
    specifically to preclude the defendant from calling her, if the
    judge were to find, based on the record before him, that the
    interest in insulating the victim from further trauma overcomes
    the defendant's presumptive right to call her.24    If a judge
    makes such a determination of unavailability, this does not
    require denial of a request for a hearing on a motion for
    restitution.   Nor does such a determination of unavailability
    mean that the defendant, after hearing, could not be ordered to
    make restitution payments on the victim's behalf.    "'[T]he right
    to confront adverse witnesses and the right to present a defense
    24
    Cf. 
    Kearney, 672 F.3d at 99-101
    (Federal child
    pornography prosecution; court affirmed trial judge's award of
    restitution to Vicky without requiring her appearance).
    36
    are distinct due process rights separately guaranteed to
    probationers' and should not be conflated."     See 
    Hartfield, 474 Mass. at 479
    , quoting Commonwealth v. Kelsey, 
    464 Mass. 315
    , 327
    n.12 (2013).     If there is "good cause" for the Commonwealth not
    to call a witness with personal knowledge to testify but to
    offer instead reliable hearsay or other evidence to establish
    the basis for its request for restitution, the requirements of
    due process are likely to be satisfied.     Cf. 
    Durling, 407 Mass. at 115
    , 118-119 (because probationer's liberty interest is
    conditional, so too is probationer's right to confront
    witnesses, and that right can be denied for "good cause").       Cf.
    also Rule 7(b) of District/Municipal Courts Rules for Probation
    Violation Proceedings, Mass. Rules of Court, at 742 (Thomson
    Reuters 2016).
    We emphasize a point previously made:      a hearing on a
    request for restitution is necessary if the basis for the
    request or the amount of restitution to be ordered is in
    dispute.   This follows from the fact that the purpose of
    restitution is to compensate the injured party for losses
    incurred as a result of the defendant's criminal conduct.       See
    Commonwealth v. Rotonda, 
    434 Mass. 211
    , 221 (2001).
    Accordingly, the Commonwealth must prove that the defendant
    caused harm to the victim, and the payment of restitution is
    limited to the economic losses caused by the conduct of the
    37
    defendant and documented by the victim.     
    Id., citing G.
    L.
    c. 258B, § 3 (o).   See 
    Nawn, 394 Mass. at 7-8
    (amount must be
    subject to proof of economic loss).     The amount of restitution
    the victim has received in other cases may thus properly be
    considered in determining to what extent she has already been
    compensated for her losses.   See United States v. Gamble, 
    709 F.3d 541
    , 553 (6th Cir. 2013).   Here, both the Commonwealth and
    the defendant requested a hearing on restitution.     The
    reliability of the Commonwealth's proffered hearsay evidence and
    restitution amount was disputed, and a hearing should have been
    held.
    3.   Conclusion.   The judgments of convictions are affirmed.
    The denial of the Commonwealth's request for a hearing on its
    motion for restitution is vacated, and the case is remanded to
    the Superior Court for further proceedings, and specifically a
    restitution hearing, consistent with this opinion.
    So ordered.