Commonwealth v. Estabrook , 472 Mass. 852 ( 2015 )


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    SJC-11833
    COMMONWEALTH vs. JASON ESTABROOK
    (and nine companion cases1).
    Middlesex.    May 7, 2015. - September 28, 2015.
    Present:   Gants, C.J., Spina, Cordy, Botsford, Duffly, Lenk,
    & Hines, JJ.
    Cellular Telephone. Constitutional Law, Search and seizure,
    Probable cause. Search and Seizure, Expectation of
    privacy, Probable cause, Warrant, Affidavit, Fruits of
    illegal search. Probable Cause. Evidence, Result of
    illegal search. Practice, Criminal, Warrant, Affidavit.
    Indictments found and returned in the Superior Court
    Department on December 6, 2012.
    Pretrial motions to suppress evidence were heard by Kathe
    M. Tuttman, J.
    Applications for leave to file interlocutory appeals were
    allowed by Lenk, J., in the Supreme Judicial Court for the
    county of Suffolk, and the appeals were reported by her.
    George E. Murphy, Jr., for Jason Estabrook.
    Daniel Beck (Susan M. Costa with him) for Adam Bradley.
    1
    Four against Jason Estabrook and five against Adam
    Bradley.
    2
    Jamie Michael Charles, Assistant District Attorney (David
    Marc Solet, Assistant District Attorney, with him) for the
    Commonwealth.
    Andrew Sellars, for American Civil Liberties Union of
    Massachusetts & another, amici curiae, submitted a brief.
    BOTSFORD, J.   In this case, we consider again a search of
    historical cellular site location information (CSLI).2    See
    Commonwealth v. Augustine, 
    467 Mass. 230
     (2014), S.C., 
    470 Mass. 837
     (2015).   The defendants, Jason Estabrook and Adam Bradley,
    stand indicted for murder and related crimes arising out of a
    shooting that took place on July 7, 2012, in Billerica.    They
    moved to suppress evidence of historical CSLI pertaining to
    Bradley's cellular telephone that the police initially obtained
    in July, 2012, without a search warrant but in compliance with
    
    18 U.S.C. § 2703
     (2006), and then, in November, 2013,
    reobtained pursuant to a warrant.   The defendants also sought
    2
    Cellular site location information (CSLI) "refers to a
    cellular telephone service record or records that contain
    information identifying the base station towers and sectors that
    receive transmissions from a [cellular] telephone" (quotations
    and citation omitted). Commonwealth v. Augustine, 
    467 Mass. 230
    , 231 n.1 (2014), S.C., 
    470 Mass. 837
     (2015). It is a record
    of a subscriber's cellular telephone's communication with a
    cellular service provider's base stations (i.e., cell sites or
    cell towers) during calls made or received, 
    id. at 237-238
    ; this
    identifies the approximate location of the "active cellular
    telephone handset within [the cellular service provider's]
    network based on the handset's communication with a particular
    cell site." See 
    id. at 238
    . Historical CSLI is "CSLI relating
    to and generated by cellular telephone use that has already
    occurred at the time of the order authorizing the disclosure of
    such data" (quotations and citation omitted). 
    Id.
     at 231 n.1.
    3
    suppression of statements they each made to police in 2012,
    following the receipt of Bradley's CSLI.   A judge of the
    Superior Court denied the motions after an evidentiary hearing;
    the defendants filed these interlocutory appeals.   See Mass. R.
    Crim. P. 15 (a) (2), as appearing in 
    422 Mass. 1501
     (1996).
    Returning to an issue briefly touched on in Augustine, 467
    Mass. at 255 n.37, we conclude that a defendant's reasonable
    expectation of privacy protected under art. 14 of the
    Massachusetts Declaration of Rights is not violated where the
    Commonwealth requests up to six hours of historical CSLI without
    obtaining a search warrant.   In this case, however, because the
    Commonwealth requested two weeks of historical CSLI, a search
    warrant was required, even though the Commonwealth proposes to
    use only six hours of the CSLI as evidence at trial.
    Nevertheless, we decide that many of the defendants' statements
    and Bradley's CSLI are not subject to suppression on account of
    the CSLI that was first obtained unlawfully:   the defendant's
    statements were not made in response to being confronted by that
    tainted CSLI, and the 2013 search warrant was supported by
    probable cause derived from information the Commonwealth
    obtained independently rather than through exploitation of the
    tainted CSLI.
    Background.   To provide context, we summarize some of the
    background facts as found by the motion judge, reserving
    4
    additional facts for consideration in connection with the issues
    raised in these appeals.3    At approximately 3:50 A.M. on July 7,
    2012, Quintin Koehler (victim) and his brother, Ryan, were at
    their home in Billerica when they heard loud noises coming from
    the kitchen.    According to Ryan, the two brothers went into the
    kitchen where they were confronted by three to four masked men.
    Each of the intruders appeared to be in his early twenties, and
    at least two of them were holding firearms.     One of the
    intruders, whom we shall call the "first intruder," had a gun
    and ordered the two brothers onto the ground.    The victim
    refused and hit a different intruder, whom we shall call the
    "second intruder," with a tea kettle, after which a struggle
    ensued between them.    At that point one or two of the other
    intruders shot the victim in the head and shoulder.     All the
    intruders then fled the scene on foot.     A few minutes later,
    police and emergency personnel arrived, and at 3:58 A.M. the
    victim was transported to a hospital where he died of a gunshot
    wound to the head.     On July 10, 2012, Nicholas Cappello told
    Deputy Chief Roy Frost of the Billerica police department and
    State police Trooper Anthony DeLucia that he lived with the
    victim, that he regularly purchased and distributed marijuana,
    and that at times he purchased the drugs from a supplier in Lynn
    3
    The defendants do not appear to dispute the facts stated
    here.
    5
    named Ashley.   The police learned that the supplier was Ashley
    Marshall, and that the defendant Bradley was an associate of
    hers.
    Prior to July 25, 2012, an assistant district attorney
    obtained through administrative subpoenas, see G. L. c. 271,
    § 17B, certain telephone records (call logs) of Bradley and
    Marshall.   The call logs associated with Bradley's cellular
    telephone revealed the time and duration of incoming and
    outgoing calls.   They also showed the telephone numbers
    associated with each call; they did not contain CSLI.      These
    call logs revealed, among other things, that Bradley's telephone
    was in contact with Marshall's telephone often on the night of
    the shooting.
    On July 25, 2012, based on information gleaned from the
    call logs and the police investigation, the Commonwealth filed
    an application in the Superior Court seeking an order to obtain
    from Bradley's cellular service provider certain records,
    including historical CSLI, relating to his cellular telephone
    for the period from July 1 through July 15, 2012.   Pursuant to
    
    18 U.S.C. § 2703
    (d), a Superior Court judge issued the requested
    order (§ 2703[d] order).4   Bradley's CSLI evidence indicated that
    4
    Section 2703(d) of the Federal Stored Communications Act,
    
    18 U.S.C. § 2701
     et seq. (2006), allows a court of competent
    jurisdiction to issue an order requiring a cellular telephone
    company to disclose certain types of records of customers,
    6
    at the time the shooting took place, his cellular telephone was
    in the area of Burlington and Bedford and communicating with a
    cell tower located three miles from the victim's home.5
    On August 2, 2012, police officers interviewed Bradley, who
    was not in custody and who denied involvement in the July 7
    shooting, but in response to their questions, told the officers
    of his cousin, the defendant Estabrook.   Police then interviewed
    Estabrook on August 15, during which Estabrook volunteered that
    he had sought treatment for a dislocated shoulder at Salem
    Hospital in the early morning hours of July 7, shortly after the
    shooting had occurred.   After the police conducted further
    investigation, on September 26, 2012, Estabrook was arrested for
    the murder of the victim.   On September 27, in another interview
    with the investigating officers, Estabrook detailed the facts of
    including CSLI, to a governmental entity if the government
    establishes that "specific and articulable facts" show
    "reasonable grounds to believe" that the records "are relevant
    and material to an ongoing criminal investigation."
    5
    In addition to the Superior Court order pursuant to 
    18 U.S.C. § 2703
    (d) (§ 2703[d] order) pertaining to Bradley's CSLI,
    the Commonwealth obtained § 2703(d) orders requiring the
    disclosure of CSLI associated with the cellular telephone
    numbers of certain persons who are not parties to these appeals,
    covering the period from July 1 to July 15, 2012. The police
    had learned from previously obtained telephone records (call
    logs) that the cellular telephones of some of the other
    individuals were in contact with Bradley's cellular telephone
    close to the time of the shooting. The CSLI obtained in
    relation to some of these individuals revealed that their
    cellular telephones also were in the area of the victim's home
    around the time of the shooting.
    7
    the July 7 home invasion and shooting and implicated himself,
    Bradley, and others in the crimes.   That same day, the officers
    also spoke to Bradley, who again denied any personal
    involvement, saying that he knew of how the incident transpired
    only from what Estabrook had told him.
    On December 6, 2012, a Middlesex County grand jury returned
    indictments against Bradley and Estabrook, charging each with
    murder in the first degree, armed home invasion, attempted armed
    robbery, carrying a firearm without a license, and unlawful
    possession of ammunition.   On November 20, 2013, Billerica
    police applied for and obtained search warrants for the same
    CSLI that the Commonwealth had collected pursuant to the
    § 2703(d) orders obtained in 2012, including Bradley's CSLI
    covering the period from July 1 to July 15, 2012.6
    In June, 2014, Bradley and Estabrook filed separate motions
    to suppress evidence of Bradley's historical CSLI on the ground
    that the Commonwealth had obtained this evidence in violation of
    art. 14.7   See Augustine, 467 Mass. at 232.   Both motions also
    6
    Deputy Chief Roy Frost of the Billerica police department
    submitted an affidavit in which he recited facts supporting the
    search warrant applications and indicated that the police sought
    the warrants in light of uncertainty as to whether Massachusetts
    law required probable cause and a search warrant, rather than a
    § 2703(d) order alone, to obtain the CSLI at issue in this case.
    7
    Jason Estabrook did not have a cellular telephone at the
    time of this investigation. Estabrook contended in his motion
    to suppress that he had standing to argue for suppression of
    8
    sought suppression of the defendants' statements made to police
    allegedly derived from the CSLI:    Estabrook argued in favor of
    suppression of his August 15 and September 27 statements;
    Bradley sought suppression of the statements he made on August 2
    and September 27.8   After an evidentiary hearing, the motion
    judge denied the defendants' motions.    The judge determined that
    the July 25, 2012, § 2703(d) order for Bradley's CSLI was not
    supported by probable cause.   She further concluded, however,
    that probable cause and a search warrant were not required for
    the CSLI pertaining to the six-hour period surrounding the time
    of the July 7 shooting because the defendants had no reasonable
    expectation of privacy in CSLI covering so brief a period.      As
    to the CSLI covering the periods beyond this six-hour window,
    the judge ruled that suppression was not called for in light of
    the fact that the police had obtained a search warrant for this
    CSLI, which was supported by probable cause derived from
    evidence independent of the CSLI.    A single justice allowed the
    defendants' applications for interlocutory review and directed
    that their appeals be consolidated and heard in this court.
    Bradley's CSLI because Estabrook used Bradley's telephone at
    times. The motion judge assumed for argument that Estabrook did
    have standing to challenge the use of Bradley's CSLI.
    8
    Estabrook also appears to have sought suppression of
    substantially all of Bradley's statements made to police during
    the investigation.
    9
    Discussion.   1.    Standard of review.   "When reviewing the
    denial of a motion to suppress, we accept the judge's findings
    of fact and will not disturb them absent clear error."
    Commonwealth v. Watson, 
    455 Mass. 246
    , 250 (2009).     However, we
    undertake "an independent determination as to the correctness of
    the judge's application of constitutional principles to the
    facts as found."   Id.
    2.   Warrant requirement.   The defendants challenge the
    motion judge's ruling that the Commonwealth did not need a
    search warrant to obtain the CSLI covering the six-hour window
    surrounding the July 7 shooting.9    They contend that any
    suggestion in this court's decision in Augustine that a request
    for CSLI for a period of six hours or less would not require a
    warrant is irrelevant to this case because here the Commonwealth
    requested CSLI covering a period of two weeks, thereby
    subjecting the request to the warrant requirement of art. 14.
    We agree.
    9
    Like the motion judge, we assume without deciding that
    Estabrook has standing to challenge the Commonwealth's
    collection of CSLI associated with cellular telephones that he
    was using around the time of the shooting, such as Bradley's.
    However, to the extent Bradley and Estabrook appear to claim
    that they have a right to seek suppression of the CSLI of other
    defendants, their claim is likely waived for lack of proper
    argument, see Mass. R. A. P. 16 (a) (4), as amended, 
    367 Mass. 921
     (1975), but in any event, we agree with the motion judge
    that they do not have standing because there is no evidence that
    either was using the cellular telephones of other persons who
    are not parties to these appeals.
    10
    In Augustine, the court held that a person has a reasonable
    expectation of privacy in historical CSLI relating to his or her
    cellular telephone, at least insofar as it covers a two-week
    period, and that this expectation of privacy rendered the
    Commonwealth's access to this information a search in the
    constitutional sense, subject to the warrant requirement of art.
    14.10    Augustine, 467 Mass. at 232, 255.     However, we surmised
    that there may be "some period of time for which the
    Commonwealth may obtain a person's historical CSLI by meeting
    the standard for a § 2703(d) order alone, because the duration
    is too brief to implicate the person's reasonable privacy
    interest."       Id. at 254.   Although we declined in Augustine to
    announce "a temporal line of demarcation between when the police
    may not be required to seek a search warrant for historical CSLI
    and when they must do so," we assumed without deciding that "a
    request for historical CSLI . . . for a period of six hours or
    less would not require the police to obtain a search warrant in
    addition to a § 2703(d) order" (emphasis added).        Id. at 255
    n.37.        We now hold that, assuming compliance with the
    requirements of 
    18 U.S.C. § 2703
    , the Commonwealth may obtain
    historical CSLI for a period of six hours or less relating to an
    10
    In so holding, the court noted that probable cause is a
    higher standard than that applicable to a § 2703(d) order.
    Augustine, 467 Mass. at 236.
    11
    identified person's cellular telephone from the cellular service
    provider without obtaining a search warrant, because such a
    request does not violate the person's constitutionally protected
    expectation of privacy.11,12
    It is important to emphasize that, in terms of reasonable
    expectation of privacy, the salient consideration is the length
    of time for which a person's CSLI is requested, not the time
    covered by the person's CSLI that the Commonwealth ultimately
    seeks to use as evidence at trial.   See Augustine, 467 Mass. at
    254.    It would violate the constitutional principles underlying
    11
    "[P]olice, trial judges, prosecutors, and defense counsel
    are entitled to as clear a rule as possible" regarding the
    amount of historical CSLI that may be requested without a
    warrant. See Commonwealth v. Rosario, 
    422 Mass. 48
    , 53 (1996).
    Accordingly, there is value in adopting a bright-line rule that
    a request for historical CSLI for a period covering six hours or
    less does not require a search warrant in addition to a
    § 2703(d) order. See id. at 56 (adopting bright-line rule that
    "otherwise admissible statement is not to be excluded on the
    ground of unreasonable delay in arraignment, if the statement is
    made within six hours of the arrest" in light of differing views
    of trial court judges as to reasonableness of delays in
    arraigning individual defendants). See also Commonwealth v.
    Powell, 
    468 Mass. 272
    , 279-282 (2014).
    12
    This exception to the warrant requirement for CSLI
    applies only to "telephone call" CSLI, which is at issue in this
    case, and not to "registration" CSLI. "Telephone call" CSLI
    indicates the "approximate physical location . . . of a cellular
    telephone only when a telephone call is made or received by that
    telephone." Augustine, 467 Mass. at 258-259 (Gants, J.,
    dissenting). By contrast, "registration" CSLI "provides the
    approximate physical location of a cellular telephone every
    seven seconds unless the telephone is 'powered off,' regardless
    of whether any telephone call is made to or from the telephone."
    Id. at 259 (Gants, J., dissenting).
    12
    our decision in Augustine to permit the Commonwealth to request
    and obtain without a warrant two weeks of CSLI -- or longer --
    so long as the Commonwealth seeks to use evidence relating only
    to six hours of that CSLI.   Cf. United States v. Verdugo-
    Urquidez, 
    494 U.S. 259
    , 264 (1990), quoting United States v.
    Calandra, 
    414 U.S. 338
    , 354 (1974) (Fourth Amendment to the
    United States Constitution "prohibits 'unreasonable searches and
    seizures' whether or not the evidence is sought to be used in a
    criminal trial, and a violation of the Amendment is 'fully
    accomplished' at the time of an unreasonable governmental
    intrusion"); United States v. Leon, 
    468 U.S. 897
    , 906 (1984)
    (wrong under Fourth Amendment is "unlawful search or seizure
    itself" [citation omitted]).   Because the Commonwealth
    requested, and obtained, CSLI relating to Bradley's cellular
    telephone covering an entire two-week period of which the six
    hours at issue were just a small part, as in Augustine, see 467
    Mass at 232-233, the warrant requirement applied to the entirety
    of Bradley's CSLI that was requested.
    This conclusion, however, does not resolve the defendants'
    appeals.   The statements made by Bradley and Estabrook after the
    police obtained Bradley's CSLI still are admissible if they are
    not the fruits of the illegal search of the CSLI.   Similarly,
    Bradley's CSLI is admissible if the search warrant ultimately
    obtained for this CSLI was based on evidence that provided
    13
    probable cause and derived from a source independent of the
    tainted CSLI.   We address these two issues in turn.
    3.   The defendants' statements.   The defendants assert that
    their statements to the police must be suppressed as a result of
    the initial illegal search of Bradley's CSLI.13    Their claim is a
    general one:    because the police obtained Bradley's CSLI before
    any of the several interviews of Estabrook and Bradley,
    everything the defendants stated during those interviews must be
    suppressed as tainted fruits of the unlawfully obtained CSLI.
    We disagree; the inquiry is more individualized.    The "crucial
    question" regarding whether a particular statement must be
    suppressed as the fruit of the initial illegal search of
    Bradley's CSLI is whether that statement "has been come at by
    exploitation of . . . [the illegal search] or instead by means
    sufficiently distinguishable to be purged of the primary taint."
    See Commonwealth v. Bradshaw, 
    385 Mass. 244
    , 258 (1982), quoting
    Wong Sun v. United States, 
    371 U.S. 471
    , 488 (1963).    With this
    in mind, we examine the statements at issue.
    a.   Bradley's interview on August 2.   The motion judge
    implicitly found that the police were investigating Bradley's
    13
    Although the point is far from clear in their briefs, we
    will assume that both defendants argue for suppression of all of
    their various statements to the police.
    14
    involvement in the shooting prior to obtaining his CSLI,14 as
    demonstrated by her finding that the Commonwealth sought and
    obtained through an administrative subpoena Bradley's call logs
    before seeking and securing the § 2703(d) order for Bradley's
    CSLI.15   When Frost and DeLucia interviewed Bradley on August 2,
    before the officers confronted Bradley with any information
    derived from the tainted CSLI, he identified Estabrook as
    someone who occasionally used his cellular telephone.16
    14
    As   stated in Frost's affidavit, the Commonwealth secured
    § 2703(d)   orders for CSLI, including that associated with
    Bradley's   cellular telephone, on July 25, 2012, and obtained
    Bradley's   CSLI on July 31, 2012, pursuant to those orders.
    15
    It is true that Frost also said at the motion to suppress
    hearing that Bradley's CSLI was the "strongest" piece of
    information suggesting his involvement in the shooting at the
    time Bradley spoke to police on August 2, 2012. Nevertheless,
    the thrust of Frost's testimony is that the police focused on
    Bradley as a suspect soon after the shooting and were interested
    in interviewing him prior to obtaining his CSLI.
    16
    State police Trooper Anthony DeLucia asked Bradley
    whether anyone else had used his telephone in the past. We do
    not view this question as exploiting Bradley's CSLI because he
    already had confronted Bradley with his call logs that revealed
    multiple calls having been placed from Bradley's telephone to
    Ashley Marshall's telephone on the night of the shooting. The
    basis for DeLucia's questions, therefore, had a source, the call
    logs, that was independent of and indeed existed prior to the
    CSLI.
    Furthermore, to the extent that the motion judge concluded
    that Bradley led investigators to Estabrook only after being
    confronted with the illegally obtained CSLI, we disagree.
    Although Bradley only described Estabrook's allegedly violent
    tendencies after being confronted with the CSLI, see note 17,
    infra, Bradley volunteered Estabrook's name as his cousin who
    used his cellular telephone before the CSLI came into play in
    15
    Accordingly, Bradley's statement did not result from the police
    exploiting Bradley's CSLI and was not a fruit of the illegal
    search of that CSLI.   See Bradshaw, 
    385 Mass. at 258
    .
    Suppression of this statement is not required.17
    b.   Estabrook's interviews on August 8 and August 15.    Soon
    after Bradley's August 2 interview, the police began
    investigating Estabrook's involvement in the shooting and
    Bradley's August 2 interview. Given that Bradley told police
    that Estabrook occasionally used his telephone and that the
    police knew from the call logs that Bradley's telephone made and
    received numerous calls immediately around the time of the
    shooting, it is reasonable to assume that the police would have
    investigated Estabrook even absent the information from Bradley
    describing Estabrook's alleged propensity for violence. Frost
    indicated as much in his testimony at the evidentiary hearing on
    the motion to suppress.
    17
    In Bradley's August 2 interview, DeLucia and Frost
    "exploited" his CSLI for the first time by asking Bradley, "[I]s
    there any reason why [your] phone would not be in Lynn [on the
    night of the shooting] and somebody would be on it outside of
    Lynn?" In response, Bradley again mentioned Estabrook,
    described Estabrook as a person who is "crazy" and "likes to rob
    people," and later added that Estabrook is "capable" of
    committing murder. Independent of whether these statements were
    the fruit of the illegal CSLI, Bradley's statements of opinion
    about Estabrook's supposed character and propensities would be
    inadmissible at trial on the ground that Bradley's opinion on
    such issues is irrelevant.
    Bradley also mentioned, at some point after being
    confronted with his CSLI, that Estabrook had a cut on his head
    in July, 2012. Bradley was unable to say with any certainty,
    however, whether Estabrook had the cut around the time of the
    shooting. We leave for the motion judge on remand to determine
    whether Bradley's statement regarding Estabrook's cut was
    sufficiently connected to any confrontation with CSLI to warrant
    suppression.
    16
    learned that his large physical build was consistent with the
    description of the second intruder, and that he, like Bradley,
    had a history of convictions for offenses involving violence and
    firearms.   The police first interviewed Estabrook on August 8.
    In the August 8 interview, Frost told Estabrook, "[W]e had
    this incident . . . on that Saturday, early morning hours, and,
    you know, we have some information that puts you there."    Almost
    immediately thereafter, however, State police Trooper Kevin
    Baker said to Estabrook, "[W]e know that there was a group of
    people there.   We have some good information on the reason they
    were there and what was going on and how things went down and
    what those people look like and . . . what their appearance was
    and where they and how they fled," and that Estabrook's name
    "continually keeps coming up."   Here, an argument could be made
    that the police officers were exploiting Bradley's illegally
    obtained CSLI because Frost had been told by Bradley that
    Estabrook occasionally used Bradley's telephone and Bradley's
    CSLI placed the telephone close to the scene of the shooting at
    the time it occurred.   We conclude that it is more probable that
    the police officers' statements reflect the results of the
    continuing investigation into the shooting that they were
    conducting independent of Bradley's CSLI.   At this time the
    police did not have any information about whether Bradley or
    Estabrook had Bradley's telephone at the time of the shooting.
    17
    Furthermore, Bradley had given Estabrook's name to investigators
    prior to being confronted with the tainted CSLI, and the police
    then determined, necessarily independent of any CSLI, that
    Estabrook matched the physical appearance of the second intruder
    who had been described by the victim's brother shortly after the
    shooting.   See Commonwealth v. Watkins, 
    375 Mass. 472
    , 483 n.9
    (1978) (defendant's statements were not fruit of earlier
    illegality where "statements came to light by means independent
    from" illegality).
    As for Estabrook's August 15 statements, it appears that
    this interview of Estabrook was not recorded, and the undisputed
    testimony of Frost was that the police did not confront
    Estabrook with any information related to the CSLI.
    Accordingly, suppression of evidence of Estabrook's statements
    made on August 8 and August 15 is not called for.    See
    Commonwealth v. Shipps, 
    399 Mass. 820
    , 829 (1987) ("improper
    conduct unrelated to the statements does not compel suppression
    of the statements").
    c.   Estabrook's interview on September 27.     Unrelated to
    any exploitation of Bradley's CSLI, the police discovered from
    Estabrook during his August 15 interview that he had sought
    treatment at Salem Hospital on the night of the shooting.
    Police obtained copies of Estabrook's medical records and
    gleaned from the hospital surveillance videos that he had
    18
    arrived at the hospital shortly after the shooting wearing
    clothes substantially matching those of the second intruder, and
    told medical staff that he was "hit in the head with a tea
    kettle."   Because Estabrook's statement was consistent with the
    victim's brother's account of what happened to the second
    intruder at the scene of the shooting, the police arrested
    Estabrook, and advised him of the Miranda rights.   He agreed to
    speak with the police.   During that interview, Estabrook
    implicated himself, Bradley, and others in the shooting.     These
    statements also are not required to be suppressed.18   See
    Commonwealth v. Nickerson, 
    79 Mass. App. Ct. 642
    , 649 (2011)
    (police misconduct "cannot deprive the [Commonwealth] of the
    opportunity to prove [the defendant's] guilt through the
    introduction of evidence wholly untainted by the police
    misconduct" [citation omitted]).
    18
    The record indicates that Estabrook made incriminating
    statements in the interview after Frost twice told him that he
    knew Estabrook was in the house when the shooting occurred.
    However, what Frost told Estabrook was not, in our view, an
    exploitation of Bradley's tainted CSLI. It is more likely that
    Frost's statement that Estabrook was at the scene of the
    shooting was derived from Estabrook's appearance at the hospital
    right after the shooting, in attire substantially matching that
    of the second intruder, and from Estabrook's statement to his
    treatment providers that he had been hit with a tea kettle. All
    that Bradley's CSLI did, after all, was locate his cellular
    telephone and its user -- whether Bradley or Estabrook -- within
    three miles of the victim's home in Billerica; the CSLI did not
    place the telephone in the house itself.
    19
    d.   Bradley's interview on September 27.   Frost and DeLucia
    interviewed Bradley again on September 27, 2012, following their
    postarrest interview of Estabrook.19   As he had on August 2,
    Bradley denied involvement in the shooting, and stated
    repeatedly that Estabrook had informed him of the shooting
    incident.   Specifically, Bradley said that Estabrook told him
    that he, Estabrook, had been hit in the head with a pot; that
    another individual, Gabriel Arias, shot the victim; and that a
    third individual, Peter Bin, also was present in the house for
    the shooting.   Bradley said that, according to Estabrook, Bin
    carried a .45 caliber pistol and Arias had a nine millimeter
    handgun during the home invasion.
    Suppression of these statements is not required.
    Throughout this interview, Frost and DeLucia confronted Bradley
    with information they had just learned from Estabrook,
    independently of the CSLI.20   To the extent the police told
    Bradley during the interview that they knew he was involved in
    the shooting, their questions and statements made clear that
    they had obtained this information through Estabrook's untainted
    19
    At the time of this interview, Bradley was also under
    arrest, but in connection with an unrelated matter.
    20
    During the interview the investigators asked Bradley who
    had his telephone on the night of the shooting and told him that
    his "phone was in Billerica." As discussed infra, Bradley's
    responses to these questions are inadmissible.
    20
    confession and other independent sources, rather than by
    exploiting the CSLI.21
    Although the defendants challenge the admissibility of all
    their statements as tainted by the previously obtained CSLI for
    Bradley's cellular telephone.   We have rejected that approach.
    Rather, we have focused primarily on the statements that were
    included in the affidavit and that support probable cause
    independent of the earlier, unlawfully obtained CSLI.   The
    motion judge relied on Brown v. Illinois, 
    422 U.S. 590
    , 603-604
    (1975), to conclude that none of the statements of Estabrook or
    Bradley needed to be suppressed because they were sufficiently
    attenuated from the illegal search of Bradley's CSLI.   We agree
    with the judge insofar as her decision applies to Estabrook's
    statements, because we are persuaded that none of his statements
    was the product of the police confronting him with evidence of
    21
    Furthermore, we are not persuaded by Bradley's contention
    that his September 27 statements must be suppressed under the
    "cat-out-of-the-bag" rule. See Commonwealth v. Mahnke, 
    368 Mass. 662
    , 686 (1975), cert. denied, 
    425 U.S. 959
     (1976) ("The
    cat-out-of-the-bag line of analysis requires the exclusion of a
    statement if, in giving the statement, the defendant was
    motivated by the belief that, after a prior coerced statement,
    his effort to withhold further information would be futile and
    he had nothing to lose by repetition or amplification of the
    earlier statements"). We have concluded that the bulk of
    Bradley's statements in his first interview on August 2 are
    admissible. In any event, Bradley's statements in the August 2
    interview did not include any sort of admission of guilt or
    indication that Bradley knew about the details of the shooting.
    In the circumstances, there was no reason for Bradley to think,
    based on his statements of August 2 that it would be "futile" to
    withhold details of the shooting on September 27.
    21
    Bradley's CSLI.   Certain of Bradley's statements are another
    matter.   At times during their interviews of Bradley, and
    particularly in the August 2 interview, the police officers
    asked questions based directly on the tainted CSLI.    The
    Commonwealth argues that all of Bradley's statements, including
    the responses to direct CSLI challenges, are admissible because,
    like Estabrook's, they were attenuated from the initial illegal
    search of the CSLI.   We disagree.   Even though the Commonwealth
    requested Bradley's CSLI on July 25 and obtained it on July 31,
    Bradley was not confronted with any question based on his CSLI
    until he was interviewed on August 2 and September 27.22     Thus,
    the circumstances here are materially different from cases,
    relied upon by the Commonwealth, in which a defendant's
    statements made hours after he was illegally arrested or after
    his home was illegally searched -- and, thus, made hours after
    he became aware of the arrest or the search -- were too
    attenuated from the arrest to be suppressed.    See Commonwealth
    v. Sylvia, 
    380 Mass. 180
    , 183-185 (1980), citing Commonwealth v.
    Fielding, 
    371 Mass. 97
    , 113-114 (1976).    Insofar as Bradley is
    concerned, his statements in direct response to confrontation
    with evidence of his CSLI were made in close proximity to the
    22
    The Commonwealth's access to Bradley's CSLI prior to
    these interviews had been without his knowledge: the § 2703(d)
    order pertaining to Bradley's CSLI explicitly prohibited
    disclosing it to him.
    22
    illegality, and there were no intervening circumstances between
    the police questions based on the CSLI and Bradley's responses
    thereto.   See Commonwealth v. Damiano, 
    444 Mass. 444
    , 456
    (2005).    The statements must be suppressed.   See Commonwealth v.
    Keefner, 
    461 Mass. 507
    , 518 (2012) (direct product of unlawful
    search must be suppressed); Commonwealth v. Porter P., 
    456 Mass. 254
    , 275 (2010) (suppression required of juvenile's statement
    about gun, made immediately after search of juvenile's room, and
    juvenile's removal from room; statement was not so distant in
    time from illegal search to dissipate taint).     We now turn to
    the CSLI itself, which was the subject of the 2013 search
    warrant.
    4.     Search warrant for CSLI.   Even though the exclusionary
    rule generally bars from admission evidence "obtained during an
    illegal search as fruit of the poisonous tree, evidence
    initially discovered as a consequence of an unlawful search may
    be admissible if later acquired independently by lawful means
    untainted by the initial illegality" (quotation omitted).
    Commonwealth v. DeJesus, 
    439 Mass. 616
    , 624 (2003).     Accord
    Commonwealth v. Frodyma, 
    393 Mass. 438
    , 441 (1984); Commonwealth
    v. Benoit, 
    382 Mass. 210
    , 216-217 (1981), S.C., 
    389 Mass. 411
    (1983).    See Nix v. Williams, 
    467 U.S. 431
    , 443 (1984); United
    States v. Silvestri, 
    787 F.2d 736
    , 740 (1st Cir. 1986), cert.
    denied, 
    487 U.S. 1233
     (1988).    Accordingly, the appropriate
    23
    inquiry here is whether, given the "primary illegality" of the
    Commonwealth's access to Bradley's CSLI pursuant to a § 2703(d)
    order, the 2013 search warrant for the same CSLI was secured "by
    exploitation of that illegality or instead by means sufficiently
    distinguishable to be purged of the primary taint."   See
    Silverthorne Lumber Co. v. United States, 
    251 U.S. 385
    , 392
    (1920); Frodyma, 
    supra,
     quoting Wong Sun, 
    371 U.S. at 488
    ;
    Commonwealth v. Forbes, 
    85 Mass. App. Ct. 168
    , 176 (2014).    See
    generally J.A. Grasso, Jr., & C.M. McEvoy, Suppression Matters
    Under Massachusetts Law § 20-3[a], at 20-10 (2014).   The
    Commonwealth bears the burden of showing by a preponderance of
    the evidence the absence of taint, i.e., that the Commonwealth
    obtained information supplying the requisite probable cause
    through an independent source.23   See Commonwealth v. Fredette,
    
    396 Mass. 455
    , 459 (1985).
    23
    The defendants urge this court to require the
    Commonwealth to establish an independent source by clear and
    convincing evidence. They note that the clear and convincing
    evidence standard governs circumstances in which the
    Commonwealth seeks to establish that a witness's in-court
    identification is derived from a source independent of a prior
    suppressed identification. See Commonwealth v. Bell, 
    356 Mass. 724
    , 724-725 (1969). The independent source rule applied in
    this case, however, is more akin to the inevitable discovery
    rule, to which we have applied the preponderance of the evidence
    standard. See Commonwealth v. O'Connor, 
    406 Mass. 112
    , 117
    (1989) ("the Commonwealth has the burden of proving the facts
    bearing on inevitability by a preponderance of the evidence").
    See also Nix v. Williams, 
    467 U.S. 431
    , 444 (1984) (rationale of
    independent source rule is "wholly consistent" with inevitable
    discovery rule); Commonwealth v. Benoit, 
    382 Mass. 210
    , 217
    24
    It is well settled that the court looks to the "four
    corners of the affidavit" to determine whether a search warrant
    application establishes probable cause.   See, e.g., Commonwealth
    v. O'Day, 
    440 Mass. 296
    , 297 (2003), quoting Commonwealth v.
    Villella, 
    39 Mass. App. Ct. 426
    , 428 (1995).   The defendants
    concede that on its face Frost's affidavit filed in support of
    the warrant established probable cause to search Bradley’s CSLI.
    They argue, however, that, contrary to the determination of the
    motion judge, much of the information set forth in the affidavit
    was obtained as a result of Bradley's unlawfully obtained CSLI.
    Accordingly, our task in evaluating the defendants' claim is to
    determine whether there are enough facts in the affidavit
    traceable to sources independent of the illegally obtained CSLI
    to establish probable cause for the search warrant.   See
    Commonwealth v. Tyree, 
    455 Mass. 676
    , 692 (2010) (evidence
    obtained during search pursuant to warrant obtained after
    illegal entry would be admissible if search warrant affidavit
    contained information supplying probable cause obtained from
    independent, untainted source).   Cf. Commonwealth v. Long, 
    454 Mass. 542
    , 552-553 (2009) (under Franks v. Delaware, 
    430 U.S. 154
     [1978], where defendant shows affidavit supporting warrant
    (1981), S.C., 
    389 Mass. 411
     (1983) (inevitable discovery rule is
    extension of independent source doctrine). We decline the
    defendants' invitation to apply the clear and convincing
    evidence standard here.
    25
    includes affirmative misstatement, judge considers whether
    "affidavit purged of false material, establishes probable
    cause").   Cf. also Commonwealth v. James, 
    620 Pa. 465
    , 481
    (2013) (court may look beyond affidavit supporting search
    warrant where objective of inquiry is "to determine whether a
    fact in the affidavit would be included or stricken when
    determining probable cause").
    Frost's affidavit describes the following:    an eyewitness
    account (provided by the victim's brother) of the shooting;
    police investigation into drug distribution from the victim's
    home and into the ultimate supplier of these drugs;
    identification of Bradley as a suspect and obtaining his call
    logs through an administrative subpoena; Bradley's statement
    giving Estabrook's name to police on August 2; Estabrook's
    statement on August 15, regarding his treatment at an area
    hospital in the early morning of the shooting, and review of his
    hospital record; Estabrook's statement on September 27,
    implicating himself and Bradley in the shooting; Marshall's
    grand jury testimony implicating Bradley in the robbery scheme;
    and forensic evidence linking Bradley to the shooting.     Frost
    avers in his affidavit that he "specifically avoided" including
    information obtained pursuant to the § 2703(d) orders in
    delineating this evidence.   Our review of the record persuades
    us that Frost succeeded in doing so.
    26
    The following information included in the affidavit was
    gathered before the Commonwealth initially obtained Bradley's
    CSLI without a search warrant, and therefore by definition was
    discovered independently of it.   At approximately 3:55 A.M. on
    July 7, the victim was shot in his home.   The victim's brother,
    who witnessed the shooting, told the police that three to four
    masked men in their early twenties had entered the home by
    kicking in a door to the kitchen; two of these intruders had
    firearms.   One of them, the first intruder, was a white male
    with blue eyes and blonde hair.   He was carrying a nine
    millimeter handgun, and ordered the victim and his brother to
    "get down on the ground."   The victim refused, and hit the
    second intruder with a tea kettle.   The second intruder was a
    heavyset white male dressed in a red shirt and black shorts with
    blue stripes.   While the victim struggled with the second
    intruder, the first intruder, and perhaps another intruder as
    well, shot the victim.   The intruders left the scene in a small
    sedan; the victim later died of a gunshot wound to the head.
    When police executed a search warrant for the victim's
    residence that same day, they found more than $10,000 in cash in
    the victim's bedroom, more than one pound of marijuana, and what
    appeared to be drug ledgers.   On July 10, 2012, Cappello told
    Frost and DeLucia that he lived with the victim, and that he
    regularly purchased and distributed marijuana.   He also said
    27
    that he had purchased multiple pounds of marijuana from a
    supplier in Lynn named Ashley in the past, but that he had not
    done so since May, 2012, because when he last purchased
    marijuana from Ashley she was accompanied by a "scary" man
    introduced to him as the "thug."     According to Cappello, the
    "thug" had many tattoos, including one on the back of his head
    that read "LYNN, MASS."     Cappello believed that the "thug"
    provided security to Ashley's boy friend.
    Frost and DeLucia obtained Ashley's telephone number from
    Cappello, and investigators learned through further
    investigation that "Ashley" was Ashley Marshall, and the "thug"
    was Bradley, who has a "LYNN, MASS" tattoo on the back of his
    head.     Bradley's race and blue eyes were consistent with the
    description of the first intruder, and his probation record
    revealed a history of charges involving violence and firearms.
    During the police investigation, the district attorney's office
    obtained through administrative subpoenas call logs associated
    with the cellular telephones of Bradley, Bin, and Marshall.24
    These records revealed that at various intervals between 8 P.M.
    24
    The defendants do not challenge the Commonwealth's
    obtaining or use of these records.
    28
    on July 6 and 6 A.M. on July 7, these individuals were in
    regular contact with one another.25
    On July 25, the Commonwealth requested and obtained
    § 2703(d) orders, and as a result received the CSLI of Bradley
    and others soon thereafter.   (See notes 5 & 14, supra.)    The
    lettered list that follows summarizes information contained in
    Frost's affidavit that was obtained by the police after they had
    received Bradley's CSLI, but without exploiting the tainted
    CSLI.26   See Frodyma, 
    393 Mass. at 442
    .
    a.   Bradley's interview with Frost and DeLucia on August 2.
    Bradley admitted to knowing Marshall and her boy friend, and
    stated that Estabrook occasionally used his cellular telephone.
    25
    According to the affidavit, the telephone calls between
    Bradley's telephone and Marshall's telephone included the
    following: seven calls between 8:42 P.M. and 11:58 P.M. on
    July 6; four calls around the time of the shooting, from 3:50
    A.M. to 3:58 A.M. on July 7; and six calls between 4:34 A.M. and
    5:18 A.M. Bin and Gabriel Arias also exchanged telephone calls
    moments before the shooting occurred, and a call was placed from
    Bradley's telephone to Bin's telephone at 3:59 A.M.
    26
    Although the discovery of certain information before the
    illegal search of Bradley's CSLI is sufficient to establish that
    information's independence from the illegality, see Commonwealth
    v. Frodyma, 
    393 Mass. 438
    , 441-442 (1984), the Commonwealth also
    may rely on evidence obtained after the illegal search if it can
    show that the evidence was independently obtained. Holding
    otherwise would contravene "the principle of the independent
    source doctrine that 'the interest of society in deterring
    unlawful police conduct and the public interest in having juries
    receive all probative evidence of a crime are properly balanced
    by putting the police in the same, not a worse, position [than]
    they would have been in if no police error or misconduct had
    occurred'". See 
    id. at 443
    , quoting Nix, 
    467 U.S. at 443
    .
    29
    b.   Frost's August 15 interview of Estabrook.   Estabrook
    volunteered that on the night of the shooting he had dislocated
    his shoulder at a party in Salem and had been treated at Salem
    Hospital at 4:15 A.M. -- a time that was shortly after the
    shooting had occurred.   The hospital's surveillance videotape
    revealed that Estabrook appeared in the hospital lobby at
    approximately 5:15 A.M. on July 7, wearing a red T-shirt and
    black shorts, consistent with the description of the second
    intruder except for the lack of stripes on the shorts.     Medical
    records, obtained from the hospital through a grand jury
    subpoena, indicated that Estabrook was admitted at approximately
    5:20 A.M., on July 7, and that he told those treating him that
    he had been "hit in the head with a tea kettle."
    c.   Estabrook's recorded interview with Frost and DeLucia
    on September 27.   He told the investigators that the robbery of
    the victim was Bradley's idea, and that Bradley had lured him
    into the robbery scheme with the promise that they could steal
    some $40,000 from the victim.   He also identified other
    individuals involved in the crimes, including Bin, Arias, Steven
    Touch, and Sophan Keo.   Further, he stated that the group
    entered the victim's home with two firearms -- a nine millimeter
    handgun and a .45 caliber pistol; that while Bradley, Keo, and
    Touch waited outside, he, Arias, and Bin entered the home where
    Arias shot the victim in the head; that members of the group who
    30
    had been wearing latex gloves discarded the gloves as they fled
    the scene; and that later that morning, Estabrook, Bradley, Bin,
    Touch, and Arias met and urged one another to keep the details
    of the shooting a secret from the authorities.
    d.   The November 15, 2012, grand jury testimony of
    Marshall, who had been granted immunity.27    Marshall stated that
    Bradley had asked her a few weeks before the shooting for a
    target to rob; that, on the evening of July 6, she suggested
    that he rob Cappello and showed Bradley photographs of what she
    believed to be Cappello's home; and that Bradley then left with
    a group of Asian males.28   When Bradley spoke to Marshall one or
    two weeks after the incident, he denied having entered the
    victim's home himself, but told her that other individuals had
    done so, and said words to the effect of, "What's done is done."
    e.   Details concerning a latex glove.   On the day of the
    shooting police found a latex glove on a road approximately one
    quarter mile from the victim's home, and determined that Bradley
    27
    Bradley argues that Marshall's grand jury testimony is
    tainted by the CSLI because, he contends, Marshall was given
    immunity on account of the fact that her own illegally obtained
    CSLI showed she was not in or near Billerica at the time of the
    shooting. Bradley has no standing to challenge Marshall's grand
    jury testimony, and in any event, his argument is based on pure
    speculation: the record offers no basis on which to reach any
    conclusion about why Marshall was granted immunity.
    28
    According to Frost's affidavit, Steven Touch, Bin, and
    Sophan Keo are Asian males.
    31
    was a potential contributor to the glove's deoxyribonucleic acid
    (DNA) profile, and that the chances of the DNA of a randomly
    selected Caucasian male matching the DNA profile of the glove
    was 1 in 1.875 quadrillion.   In addition, the glove contained
    gunshot residue, indicating that the person wearing the glove
    fired a gun or was near a gun at the time it was fired.
    An affidavit in support of a search warrant for CSLI must
    demonstrate "probable cause to believe [1] 'that a particularly
    described offense has been, is being, or is about to be
    committed, and [2] that [the CSLI being sought] will produce
    evidence of such offense or will aid in the apprehension of a
    person who the applicant has probable cause to believe has
    committed, is committing, or is about to commit such offense.'"
    Augustine, 467 Mass. at 256, quoting Commonwealth v. Connolly,
    
    454 Mass. 808
    , 825 (2009).    The information just summarized, all
    contained in Frost's affidavit and all of which had a source
    separate and apart from the tainted CSLI, meets this two-pronged
    test.   As to the first prong, certainly the affidavit supplies
    probable cause to believe that the criminal offenses of murder
    and home invasion, among others, were committed at the victim's
    home, given that the victim's brother witnessed the incident and
    Estabrook confessed to details of the crimes.    With respect to
    the second prong, the independently obtained facts in Frost's
    affidavit (including Estabrook's September 27 statements to the
    32
    police detailing his and Bradley's involvement, and Bradley's
    DNA on the latex glove) provide probable cause to believe that
    Bradley and Estabrook were part of the group who perpetrated the
    home invasion and murder of the victim.   Accordingly, the
    affidavit establishes probable cause to believe that the CSLI
    would "produce evidence" of these offenses by indicating whether
    Bradley's cellular telephone, which also may have been used by
    Estabrook, was located near the victim's home on the night of
    the shooting and, therefore, whether Bradley (or Estabrook) was
    in the area of the shooting when it occurred.     Given that the
    2013 search warrants for the CSLI were supported by probable
    cause based on evidence independent of the illegally obtained
    CSLI, suppression of evidence relating to Bradley's CSLI is not
    warranted.   See Frodyma, 
    393 Mass. at 440-441
    .
    Conclusion.   The order of the Superior Court is affirmed
    with respect to the denial of the defendants' motions to
    suppress evidence of Bradley's CSLI.   The order is vacated with
    respect to the denial of the defendants' motions to suppress all
    statements, and the case is remanded to the Superior Court for
    further proceedings consistent with this opinion.
    So ordered.