Commonwealth v. Gumkowski ( 2021 )


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    SJC-12670
    COMMONWEALTH   vs.   MATTHEW GUMKOWSKI.
    Bristol.     January 4, 2021. - May 4, 2021.
    Present:    Budd, C.J., Gaziano, Lowy, Wendlandt, & Georges, JJ.
    Homicide. Cellular Telephone. Practice, Criminal, Motion to
    suppress, Instructions to jury, Capital case.
    Indictment found and returned in the Superior Court
    Department on August 18, 2011.
    A pretrial motion to suppress evidence was heard by Frances
    A. McIntyre, J., and the case was tried before Robert J. Kane,
    J.
    Michael J. Fellows for the defendant.
    Stephen C. Nadeau, Jr., Assistant District Attorney, for
    the Commonwealth.
    LOWY, J.   The defendant, Matthew Gumkowski, was convicted
    by a jury of murder in the first degree on a theory of extreme
    atrocity or cruelty for the killing of Joseph Kilroy.1     The
    1 The defendant had also been indicted on related charges,
    but at trial the Commonwealth proceeded only on the murder
    indictment, under theories of extreme atrocity or cruelty,
    2
    Commonwealth presented evidence that the defendant robbed the
    victim, and then beat, strangled, and stabbed him to death.       The
    verdict came in the defendant's second trial, after the first
    trial ended in a mistrial because the jury were unable to reach
    a verdict.
    In this direct appeal, the defendant argues first that his
    cell site location information (CSLI)2 and any "fruits" derived
    from it should have been suppressed, and second that seven
    aspects of the jury instructions were erroneous.   Discerning no
    reversible error, we affirm, and we decline to exercise our
    authority under G. L. c. 278, § 33E.
    1.   Background.   We summarize the evidence at trial,
    reserving certain details for our analysis of the issues.
    The victim was found dead at his Attleboro apartment on
    July 10, 2011.    Sometime between 8:30 P.M. and 9 P.M., the
    victim's downstairs neighbors heard noises that sounded like
    furniture being moved about.    Shortly after 9 P.M., the smoke
    alarms sounded.   When firefighters arrived minutes later, they
    felony-murder, and deliberate premeditation. The jury did not
    convict the defendant on the felony-murder or deliberate
    premeditation theories.
    2 "Cell[] 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. Estabrook, 
    472 Mass. 852
    , 853 n.2 (2015).
    3
    found the victim's body lying on the floor at the foot of the
    bed.   The fire that had started on the victim's bed was no
    longer active, the sprinklers were on, and the contents of the
    room were soaked.    The victim had been beaten, strangled, and
    stabbed.    A medical examiner testified that, based on the
    bleeding, the victim was likely alive when he suffered the blunt
    force injuries, but was already dead or near death when he was
    stabbed.
    Police photographed the room to document its state at the
    time the body was discovered.    They tested for fingerprints at
    the scene, and they recovered various objects from inside the
    apartment for testing, but no usable fingerprints were found,
    likely because of the sprinklers.
    The defendant knew the victim and had bought drugs from him
    in the past.   In July 2011, the defendant was using
    approximately a gram of heroin per day.     On the morning of July
    10, the defendant visited the victim's apartment, hoping to sell
    him a ring.    The victim knocked on the door of his neighbor
    across the hall -- a former jeweler -- and asked him to look at
    the ring.   When the neighbor looked at the ring, he expressed
    skepticism about its value.     The neighbor saw another man
    standing in the victim's apartment; the neighbor described the
    man as white, with a medium build and blonde hair.     The neighbor
    later identified the defendant as the man who had been in the
    4
    victim's apartment that morning from a photograph shown to him
    by police.
    The defendant's girlfriend testified that in the early
    evening of July 10, she had been with the defendant in a park in
    Attleboro, where she had fallen asleep.     When she awoke around 8
    P.M., the defendant was gone.   She called the defendant several
    times between 8:15 P.M. and 9:09 P.M., including on cell phones
    borrowed from two strangers.    Initially, she did not get an
    answer, but she eventually spoke to the defendant.    She then met
    up with the defendant shortly after the 9:09 P.M. cell phone
    call.    State police Trooper Daniel Giossi testified that the
    defendant's cell phone records showed calls taking place from
    the defendant's cell phone between around 8 P.M. and 9:15 P.M.,
    and the location data showed that the cell phone was in the
    Attleboro area at the time of the calls.3
    The defendant was arrested on July 12, 2011, at his
    girlfriend's mother's house.4   The defendant became a suspect
    3 The parties stipulated that the defendant's cell phone
    records showed he was within a three-mile radius of the center
    of downtown Attleboro between 8:13 P.M. and 8:45 P.M. on July
    10.
    4 The Commonwealth also introduced evidence showing the
    defendant's activities between the night of July 10 and his
    arrest. On July 10 after meeting up at the park, the defendant
    and his girlfriend traveled to Pawtucket, Rhode Island, where
    they stayed in a hotel. The next morning, they went to a pawn
    shop. The defendant went inside while his girlfriend waited
    outside; when he returned, he had money. The couple then
    5
    after law enforcement examined both the victim's and the
    defendant's cell phone records, as discussed infra.   Before he
    was taken into custody, police patted him down and found a
    hypodermic needle in his pocket; testing later revealed traces
    of heroin.   While the defendant was being booked, an officer
    noticed spots of blood on the defendant's shoes.
    Deoxyribonucleic acid (DNA) testing revealed that the blood
    matched that of the victim.   Two additional spots of blood found
    on a T-shirt and pack of cigarettes from the defendants'
    backpack also matched that of the victim.
    After his arrest, the defendant waived his Miranda rights
    and was interviewed by police.   That interview was recorded, and
    the recording was entered in evidence.   The defendant initially
    denied involvement, but he eventually said that he had gone to
    the victim's apartment on the evening of July 10 to buy heroin.
    He told police that two other men were present while he was
    there.   The first man arrived to sell the victim cigarettes and
    stayed ten to fifteen minutes.   The defendant described the
    second man but could not identify him, and said that the second
    returned to Attleboro, where the girlfriend picked up a check,
    and the two traveled to Providence, where she cashed the check
    and gave a portion to the defendant. That evening, they had
    dinner with a man they met in Providence and spent the night at
    the man's home in North Attleboro. The next morning, all three
    went to the beach, before traveling back to the girlfriend's
    mother's home.
    6
    man was still at the apartment when the defendant left.      The
    defendant stated that he left the apartment after purchasing
    drugs.   He explained that he had initially lied about visiting
    the victim because he had been there to purchase drugs, and
    because he later heard about the fire and homicide from the
    news.
    At trial, the defendant testified and provided a somewhat
    different account of his time at the victim's apartment.     He
    identified the cigarette seller as a man named Brian Singer.         He
    stated that after Singer had left and while the second,
    unidentified, man was in the apartment, the victim brandished a
    knife and provoked a fight with the defendant over money that
    the defendant owed him.     The defendant said he struck the victim
    several times in the face, and the victim dropped the knife.         He
    then grabbed his backpack and left.     The defendant stated that
    in his initial interview after being arrested, he had lied about
    getting in a fight because he had seen the news and had heard
    that there had been a fire and a homicide there.
    2.   Discussion.   a.    Motion to suppress.   "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
    7
    the judge's application of constitutional principles to the
    facts as found."   
    Id.
    The defendant's cell phone records in this case included
    subscriber information, call logs, and CSLI.5   The subscriber
    information and the call logs are not subject to the warrant
    requirement under Commonwealth v. Augustine, 
    467 Mass. 230
    , 251
    (2014), S.C., 
    470 Mass. 837
     and 
    472 Mass. 448
     (2015).   Thus,
    only the defendant's CSLI is at issue.   The defendant seeks to
    5 The motion judge made her decision before we issued our
    decision in Commonwealth v. Augustine, 
    467 Mass. 230
     (2014),
    S.C., 
    470 Mass. 837
     and 
    472 Mass. 448
     (2015). Consequently, the
    terminology she used to describe the various categories of
    location data differs from our subsequent decisions defining
    CSLI, "repoll numbers," and "pings." See Commonwealth v.
    Almonor, 
    482 Mass. 35
    , 36 n.1 (2019) (pings); Commonwealth v.
    Collins, 
    470 Mass. 255
    , 269 (2014) (repoll numbers); Augustine,
    supra at 231 n.1 (CSLI). Thus, we look to the record, and not
    to the judge's terminology.
    The location information included "repoll numbers" as well
    as "first cell" and "last cell" data. Trooper Giossi testified
    that the combination of these three numbers indicates the
    location of the tower to which a cell phone was connected when
    it made a call, which shows the cell phone was likely within a
    three-mile radius of that tower.
    In its brief, the Commonwealth initially argued that this
    information was not CSLI, but merely "repoll numbers," as the
    motion judge found. An hour before oral argument, though, the
    Commonwealth sent an e-mail message to the defense attorney,
    conceding that this information was actually CSLI. See Collins,
    470 Mass. at 269-270 (repoll numbers only provide location
    within area of approximately one hundred miles and thus are not
    comparable to CSLI). In its postargument brief, the
    Commonwealth again conceded that the relevant location data was
    CSLI.
    8
    suppress both the CSLI itself, as well as any fruits derived
    therefrom.
    i.   Investigation leading to defendant's arrest.    We recite
    the facts the motion judge found following an evidentiary
    hearing, supplemented with undisputed facts from the record.
    Commonwealth v. Jones-Pannell, 
    472 Mass. 429
    , 431 (2015).
    When officers discovered the victim's body at his
    residence, they also found the victim's cell phone.      However,
    police were unable to extract any information from it because it
    was soaked.   A neighbor provided the victim's cell phone number,
    and using that, Trooper Giossi obtained the victim's call logs
    and other information from his service provider, Sprint.     In the
    call logs, Giossi focused on incoming and outgoing calls
    occurring shortly before 9 P.M., when witnesses reported hearing
    commotion coming from the victim's apartment.   Giossi then made
    a second request to Sprint for information pertaining to two of
    those numbers pursuant to the exigent circumstances provision of
    the Stored Communications Act (SCA), 
    18 U.S.C. § 2702
    (c)(4).6
    6 Specifically, Giossi requested subscriber information and
    call detail records with cell site information for the past
    twenty-four hours. To make the request, he called Sprint and
    requested that someone send him an "exigent circumstance
    request." He filled out the request and sent it back to Sprint.
    The motion judge noted that the information was obtained
    pursuant to 
    18 U.S.C. § 2703
    , but that is inaccurate. Giossi
    repeatedly referred to making an "exigent circumstance request,"
    which would be under § 2702(c)(4).
    9
    One of the numbers was registered to "Matthew Shady" and
    listed a West Warwick, Rhode Island, address.7   In addition to
    that subscriber information, the records showed the dates,
    times, and durations of incoming and outgoing calls, as well as
    CSLI.    Troopers called the local police department and learned
    that the West Warwick address was valid and that the resident
    was the defendant.    Local police had previously interacted with
    the defendant and sent Giossi a photograph of the defendant, as
    well as incident reports of some of his previous arrests.     From
    these documents, Giossi learned that the defendant was blonde
    and muscular, and that he matched the description of the man
    that Singer, a friend of the victim, had seen talking to the
    victim on the morning of July 10.    Giossi examined the
    defendant's CSLI and determined that it placed his cell phone in
    the Attleboro area on the evening of July 10.
    On July 11, Giossi interviewed Singer, who had gone to the
    victim's apartment at around 8 P.M. on the day of the murder to
    sell the victim two packs of cigarettes, and who had stayed for
    about twenty minutes.    While Singer was there, the victim
    introduced him to a man named "Matt."    The man was muscular,
    with a crew cut, blonde hair, blue eyes, and tattoos.      Based on
    7 Troopers did not receive any information pertaining to the
    second number.
    10
    this information, law enforcement prepared a photographic array,
    including the photograph of the defendant that the West Warwick
    police had sent.     From the array, Singer identified the
    defendant as the blonde man he had seen in the victim's
    apartment.8
    Troopers then attempted to locate the defendant.        On the
    defendant's call log, they noticed recent calls to a land line
    telephone number, and subsequently ascertained the address
    associated with it.     On July 12, Giossi visited that address and
    spoke with the occupant, Nita Rose.     Rose stated that her
    daughter was dating the defendant, and that the defendant had
    left some of his property there and likely would return to
    retrieve it.
    Later that day, Rose called the State police to say that
    she had just heard from her daughter, and that she expected her
    daughter and the defendant to return to the house shortly.
    Troopers returned to Rose's address and waited for the defendant
    to arrive.     As soon as he did, officers placed him under arrest.9
    8 Singer did not testify at trial because officers were
    unable to locate him. He was last seen in Ohio, but authorities
    there were unable to locate him. His friends and family
    indicated that as of the day he went missing, there had been no
    activity on his bank accounts.
    9 Before apprehending the defendant, investigators also
    contacted the defendant's cell phone provider, which then
    initiated a "ping" to ascertain the defendant's location in real
    time. The motion judge found that that "ping" did not lead to
    11
    ii.    CSLI.    Individuals have a reasonable expectation of
    privacy in their CSLI, and thus the government needs a warrant
    before searching more than six hours of CSLI data.     See
    Augustine, 467 Mass. at 255 & n.37.     See also Carpenter v.
    United States, 
    138 S. Ct. 2206
    , 2220 (2018).
    Even though the defendant's motion was decided before
    Augustine, the rule nonetheless applies.    In Augustine, 467
    Mass. at 257, we specified that the new rule requiring a warrant
    for CSLI data applied to "cases in which a defendant's
    conviction is not final, that is, to cases pending on direct
    review in which the issue concerning the warrant requirement was
    raised."     Here, the defendant raised the issue in a motion to
    suppress before his first trial, and Augustine was decided
    before his conviction was final.     Thus, the new rule applies
    retroactively to his case, and a warrant was required for his
    CSLI data.
    Despite this, the Commonwealth argues that a warrant was
    not required for the defendant's CSLI because the information
    was turned over pursuant to the voluntary disclosure provision
    of the SCA (
    18 U.S.C. § 2702
    ), rather than the mandatory
    the defendant's arrest; instead, officers located the defendant
    thanks to their communication with Rose. The Commonwealth also
    stipulated that it would not introduce the "ping" evidence at
    trial. See Commonwealth v. Almonor, 
    482 Mass. 35
    , 36 n.1 (2019)
    (defining "ping" evidence).
    12
    provision analyzed in both Augustine and Carpenter (
    18 U.S.C. § 2703
    ).10    See Augustine, 467 Mass. at 231; Carpenter, 
    138 S. Ct. at 2212
    .    This is wrong.
    Both art. 14 of the Massachusetts Declaration of Rights and
    the Fourth Amendment to the United States Constitution apply
    only to State action.11    Commonwealth v. Leone, 
    386 Mass. 329
    ,
    333 (1982).    "Evidence discovered and seized by private parties
    is admissible without regard to the methods used, unless State
    officials have instigated or participated in the search"
    10The Stored Communications Act aims to "protect the
    privacy of users of electronic communications during government
    investigations" (quotation and citation omitted). Commonwealth
    v. Chamberlain, 
    473 Mass. 653
    , 658 (2016). "Service providers
    are permitted and indeed required to disclose customer records
    to a 'governmental entity' when that entity has complied with
    one of the limited number of formal processes for making a
    demand, such as a warrant, a court order, or an administrative
    subpoena, as set forth in the act." Id. at 658-659, citing 
    18 U.S.C. § 2703
    (c).
    Another section of the statute permits providers to
    disclose records to the government voluntarily in limited
    circumstances. See 
    18 U.S.C. § 2702
    (c). "One such circumstance
    is when 'the provider, in good faith, believes that an emergency
    involving danger of death or serious physical injury to any
    person requires disclosure without delay of information relating
    to the emergency.'" Chamberlin, 473 Mass. at 659, citing 
    18 U.S.C. § 2702
    (c)(4).
    11The Commonwealth does not frame its argument in terms of
    State action, but that is the constitutional question underlying
    its contention. The Commonwealth instead based its argument on
    Chamberlain, 473 Mass. at 658-659, which is inapposite because
    that case dealt only with statutory rights.
    13
    (citation omitted).     Commonwealth v. Brandwein, 
    435 Mass. 623
    ,
    632 (2002).
    Here, law enforcement instigated the search when Giossi
    contacted Sprint and requested the defendant's cell phone
    records.     That he did so using a voluntary disclosure provision
    of the SCA, rather than a mandatory disclosure provision, does
    not require a different conclusion.     In either instance, if law
    enforcement instigates the search by contacting the cell phone
    company to request information, there is State action.12    That
    Sprint could have refused to provide records in response to
    Giossi's request does not change the fact that he instigated the
    search.     See Brandwein, 435 Mass. at 632.
    Because law enforcement infringed upon the defendant's
    reasonable expectation of privacy in his CSLI without a warrant,
    the CSLI should have been suppressed.
    iii.    Harmless error.   Next, we determine whether the
    admission of defendant's CSLI data was harmless.13    Because the
    12In Augustine, 467 Mass. at 240-241, we noted that one
    factor showing State action was that the search was compelled by
    the Commonwealth's subpoena. Yet this did not change our test
    for State action from Brandwein, 435 Mass. at 632. Further,
    although decided under the Fourth Amendment, Carpenter 
    138 S. Ct. at 2213-2214
    , implicitly held that there was State action,
    and the fact that police officers there used a mandatory
    subpoena did not factor into the United States Supreme Court's
    analysis.
    13The Commonwealth did not argue harmless error in its
    original brief; instead, it raised the issue for the first time
    14
    defendant moved to suppress this evidence before trial, we
    review the admission of the CSLI to determine whether it was
    harmless beyond a reasonable doubt.   Commonwealth v. Tavares,
    
    482 Mass. 694
    , 709 (2019).
    Our review under this standard considers a number of
    factors, including
    "[1] the importance of the evidence in the prosecution's
    case; [2] the relationship between the evidence and the
    premise of the defense; [3] who introduced the issue at
    trial; [4] the frequency of the reference; [5] whether the
    erroneously admitted evidence was merely cumulative of
    properly admitted evidence; [6] the availability or effect
    of curative instructions; and [7] the weight or quantum of
    evidence of guilt."
    Commonwealth v. Seino, 
    479 Mass. 463
    , 467-468 (2018), quoting
    Commonwealth v. Dagraca, 
    447 Mass. 546
    , 553 (2006).   We then
    must decide, based "on the totality of the record before us,
    weighing the properly admitted and the improperly admitted
    evidence together, [whether] we are satisfied beyond a
    reasonable doubt that the tainted evidence did not have an
    effect on the jury and did not contribute to the jury's
    verdicts."   Commonwealth v. Tyree, 
    455 Mass. 676
    , 701 (2010).
    at oral argument, and then submitted a postargument letter. The
    defendant argues that it is the Commonwealth's burden to prove
    harmlessness and that the Commonwealth waived the issue by not
    arguing it in its brief. Recognizing the unusual nature of the
    situation -- where the Commonwealth conceded that the data was
    CSLI the morning of oral argument -- we ordered postargument
    briefing on the issue of harmless error. Because the defendant
    has now had an opportunity to respond, we consider the issue.
    15
    We hold that the introduction of the defendant's CSLI data
    was harmless.    First, it was cumulative of other evidence.   The
    Commonwealth introduced the CSLI in the form of a stipulation,
    stating that the defendant's cell phone was located within a
    three-mile radius of downtown Attleboro between 8:13 P.M. and
    8:45 P.M. on July 10.    This was cumulative of the defendant's
    videotaped police station interview, where he stated that he
    went to the victim's Attleboro home on the evening of July 10.
    Moreover, the defendant's girlfriend testified that she was with
    the defendant in Attleboro before and after the time of the
    murder.   Thus, the CSLI only corroborated other undisputed
    evidence that the defendant was in Attleboro at around the time
    of the murder.   See Commonwealth v. Vazquez, 
    478 Mass. 443
    , 446
    (2017) ("The CSLI evidence corroborated the Commonwealth's
    other, very strong evidence of guilt by confirming . . . that
    the defendant was in fact in the area of the crime at the time
    of the shooting").
    Second, the prosecutor did not mention the CSLI with any
    frequency.   In closing argument, the prosecutor stated that the
    defendant's cell phone records showed he was in the victim's
    room at the time of the murder, but it appears he was referring
    to the call logs, not the CSLI, because he proceeded to
    reference the girlfriend's calls to the defendant, and the
    defendant's statement that he had been at the victim's apartment
    16
    when he received one of them.     The CSLI itself was never
    referred to in closing.
    Finally, the other evidence of guilt was substantial.        The
    defendant admitted to being in the victim's room on the night of
    the murder.    When he was arrested two days later, police found
    blood with DNA matching the victim's on his shoe as well as
    items in his backpack.     Thus, we are convinced beyond a
    reasonable doubt that the CSLI data "did not have an effect on
    the jury and did not contribute to the jury's verdicts."      Tyree,
    455 Mass. at 701.14
    iv.    Fruits.   Next, the defendant argues that not only
    should the CSLI have been suppressed, but so should any fruits
    derived from it.      He argues that both the call logs and the
    evidence seized during his arrest are tainted by the unlawfully
    obtained CSLI data, thus constituting fruits of the poisonous
    tree.     See Wong Sun v. United States, 
    371 U.S. 471
    , 484 (1963).
    Because neither of these categories of evidence was derived from
    the CSLI, they are not fruits.
    14The Commonwealth also argued at oral argument -- despite
    not having briefed the issue -- that the CSLI should not be
    suppressed because we should apply the "good faith" exception to
    the exclusionary rule, which we have not recognized in the
    Commonwealth. See Commonwealth v. Fredericq, 
    482 Mass. 70
    , 84
    (2019). Because we find the error was harmless, we need not
    address that argument.
    17
    "Under what has become known as the 'fruit of the poisonous
    tree' doctrine, the exclusionary rule bars the use of evidence
    derived from an unconstitutional search or seizure."    Tavares,
    482 Mass. at 706, quoting Commonwealth v. Fredericq, 
    482 Mass. 70
    , 78 (2019).    "In determining whether the evidence is
    considered a fruit of the poisonous tree, we consider 'whether
    . . . the evidence . . . has been come at by exploitation of
    [that] illegality or instead by means sufficiently
    distinguishable to be purged of the primary taint.'"    Tavares,
    supra, quoting Fredericq, supra.
    First, the call logs were not fruits of the CSLI.15      The
    Commonwealth received the call logs and the CSLI as a result of
    the same request.16   The mere fact that the call logs were
    requested contemporaneously and were produced on the same sheet
    of paper as the CSLI does not render them a fruit; the logs were
    not derived from the CSLI or obtained as a result of a CSLI
    request.    See Tavares, 482 Mass. at 706.17
    15The call logs included incoming and outgoing calls, the
    times and dates of those calls, and the duration of each call.
    As discussed supra, the call logs are not subject to the warrant
    requirement under Augustine, 467 Mass at 251.
    16At   the suppression hearing, Giossi testified that he
    asked for   the subscriber information and call detail records
    with CSLI   in the same request. Call detail records include both
    call logs   and CSLI.
    17The defendant argues that this reasoning renders the
    exclusionary rule toothless because it does not disincentivize
    18
    Second, the defendant's arrest -- and the clothing seized
    from him postarrest -- are also not fruits of the CSLI.      The
    defendant became a suspect not as a result of his CSLI, but
    through information garnered from his call logs and subscriber
    information.   Police began investigating the defendant because
    his cell phone number was one of two numbers that had been in
    contact with the victim's cell phone shortly before the victim's
    death.    Police then requested the defendant's cell phone records
    from Sprint.   The defendant's subscriber information showed his
    cell phone was registered to an address in West Warwick, Rhode
    Island.   The investigators then called the West Warwick police
    department and learned that the defendant was blonde with blue
    eyes and a muscular build -- matching the description of both
    the man whom the victim's neighbor saw discussing a ring that
    morning and the man whom Singer saw in the victim's apartment
    around 8 P.M. on the night of the murder.    Police used a
    photograph of the defendant sent by West Warwick police to
    conduct a photographic array with Singer, who identified the
    police from securing and using CSLI without a warrant. On the
    contrary, if police unlawfully obtain CSLI, any fruits derived
    therefrom must be suppressed unless the Commonwealth proves that
    the evidence is untainted. See Commonwealth v. Blevines, 
    438 Mass. 604
    , 610-611 (2003). The fact that the call logs were not
    derived from the CSLI, and thus are not a fruit, does not gut
    the exclusionary rule. Rather, that is simply how the rule
    works.
    19
    defendant as the blonde male he had seen talking to the victim
    shortly before his death.18
    Police did also look at the defendant's CSLI.     It showed
    that he had been within three miles of Attleboro around the time
    of the murder.   Yet the CSLI was merely "cumulative and
    corroborative" of other evidence, and thus did not lead to the
    defendant becoming a suspect.     Vazquez, 478 Mass. at 446.
    Finally, the defendant was located and arrested through, as
    the motion judge put it, "traditional investigative techniques,"
    not through the CSLI.     To locate the defendant, police started
    by contacting the telephone numbers on the victim's call log.
    They noticed a land line telephone number, figured out its
    location, and visited it.     There they found Rose, the
    defendant's girlfriend's mother.    Rose stated that the defendant
    had left some of his belongings in her home, and that she
    expected him to return.     Later that day, Rose called one of the
    officers, stating that her daughter and the defendant had just
    called and that they would be returning to the house soon.
    Police went to Rose's house.     When the defendant arrived, they
    placed him under arrest.19    Thus, the apprehension and arrest of
    18 The neighbor also identified the defendant from a
    photographic array, although that evidence was not introduced at
    the suppression hearing.
    19 Other officers who did not testify at the suppression
    hearing contacted Sprint to request a "ping" of the defendant's
    cell phone to attempt to locate him prior to his arrest. But,
    20
    the defendant was also not a fruit of any unlawfully obtained
    evidence, and therefore evidence obtained as a result should not
    be suppressed.
    b.    Jury instructions.   Next, the defendant argues that his
    counsel was ineffective for failing to object to seven portions
    of the jury instructions, and that the failure to object created
    a substantial likelihood of a miscarriage of justice.    We
    disagree.
    "Because the defendant was convicted of murder in the first
    degree, rather than evaluating claims of ineffective assistance
    under the traditional standard of Commonwealth v. Saferian, 
    366 Mass. 89
    , 96 (1974), we apply instead the more favorable
    standard of G. L. c. 278, § 33E, to determine whether there was
    a substantial likelihood of a miscarriage of justice" (footnote
    omitted).   Seino, 479 Mass. at 472 , citing Commonwealth v.
    Wright, 
    411 Mass. 678
    , 681–682 (1992), S.C., 
    469 Mass. 447
    (2014).   "That is, we determine whether defense counsel erred in
    the course of the trial and, if so, 'whether that error was
    likely to have influenced the jury's conclusion.'"   Seino, supra
    at 472-473, quoting Wright, 
    supra at 682
    .
    as the motion judge found, the pings were "not material in his
    arrest in that he was apprehended through traditional
    investigative measures."
    21
    "When evaluating jury instructions, we consider the charge
    in its entirety, to determine the probable impact, appraised
    realistically . . . upon the jury's factfinding function"
    (quotation and citation omitted).     Commonwealth v. Walker, 
    466 Mass. 268
    , 284 (2013).   "Jury instructions must be construed as
    a whole to prevent isolated misstatements or omissions from
    constituting reversible error."     
    Id.,
     citing Commonwealth v.
    Owens, 
    414 Mass. 595
    , 607 (1993).     We examine each portion of
    the jury instructions in turn.
    i.   Factual questions.   First, the defendant argues that
    the following instruction asked the jury to find facts that were
    immaterial to any element of the crime and placed a burden on
    the defendant to prove that someone else had killed the victim:
    "Now, I say this to you. You're charged with finding the
    facts. It's your job. I have nothing to do with it. To
    find the facts. In this case, you are being asked to
    determine what happened at Apartment 9 located at 49 Dunham
    Street in Attleboro during the evening hours of July the
    10th, 2011. That inquiry by this jury presents, among
    others, the following examinations. One, who was there
    that night? Two, when did each party arrive? Three, what
    was each party's purpose in going to that apartment that
    night? Four, what did each party do? And five, what was
    the sequence of events? And I'm going to repeat those.
    Who was there that night? When did each party arrive?
    What was each party's purpose in going to Room No. 9 at 49
    Dunham Street? What did each party do inside that room?
    What was the sequence of events?"
    The defendant likens this instruction to the one reviewed
    in Bihn v. United States, 
    328 U.S. 633
     (1946).    There, multiple
    defendants were tried for conspiracy, and a crucial issue for
    22
    one of the defendants was whether she stole ration coupons from
    a bank.   
    Id. at 634-635
    .    The judge instructed the jury:
    "Who would have a motive to steal them? Did she take these
    stamps? You have a right to consider that. She is not
    charged with stealing, but with conspiracy to do all these
    things, and you have a right to consider whether she did
    steal them, on the question of intent. Did she steal them?
    Who did if she didn't? You are to decide that."
    
    Id. at 636-637
    .   The United States Supreme Court held that with
    respect to the defendant in question, the charge was prejudicial
    error, because it essentially shifted the burden of proof to the
    defendant by "putting on [the defendant] the burden proving her
    innocence by proving the identity of some other person as the
    thief" (citation omitted).    
    Id. at 637
    .
    Although the judge's instruction here was ill advised,
    trial counsel's failure to object did not create a substantial
    likelihood of a miscarriage of justice.     Looking at the
    instructions as a whole, we do not believe it would have
    substantially affected the jury's function as the sole finder of
    the facts.   See Walker, 466 Mass. at 284.    First, the judge
    began the instruction by reiterating that he had no role in
    finding the facts; that was the sole province of the jury.       This
    harkened back to one of his initial instructions, where he
    stated, "I'm going to bring up suggestions.     Not requirements."
    Further, while the instruction posed factual questions to the
    jury that were tangential to finding the elements of the crime,
    23
    unlike in Bihn, the judge did not require the jury to find these
    tangential facts.
    ii.   Bias.     Second, the defendant argues that the judge
    undermined the defendant's credibility by instructing the jury
    that he "has a bias."    The comment came at the end of the
    judge's general instructions regarding credibility:
    "Credibility, jurors. What do we mean by that? You know
    about it. Sure, you do. You use it in your everyday
    affairs. Think about this. Do people come up to you and
    tell you to believe something? Ask you to say yes? And
    it's something that you want to think about. What do you
    do? What's the first thing? Well, you're watching the
    person. Sure, you are. You want to figure out from your
    common sense whether or not this person is believable. So
    you're watching demeanor. You're also listening carefully
    to the words and asking yourself he just said that, but
    then he said this, and those two don't make sense. If he
    said this, then that doesn't follow. You're listening to
    him to see whether this is double talk, or sales talk, or
    this is the genuine article. Three, you're thinking what's
    in it for him or her. Is there bias? Is there self
    interest? All of that comes into play. So you are in a
    sense evaluating all the time in your lives believability.
    And I say to you that you're going to use essentially those
    same tools when you go into that jury room, and you use
    your common sense and life's experiences to decide this.
    "You're going to be asking about consistency. You're going
    to ask yourself about coherency. Does it appeal to common
    sense and logic? And you're going to ask yourself about
    how it was presented, and you will also ask yourself about
    bias or interest. And bear this in mind. The defendant
    has a bias. He has an interest. So do the police. So do
    the police. Anyone who works for an agency that's involved
    in the case has a bias. So don't think the only person
    with a bias is the defendant, because that's not so."
    "It is appropriate for a judge to mention that interest in
    the case is a criterion, along with others which the judge
    24
    detailed, for assessing the credibility of witnesses."
    Commonwealth v. Ramos, 
    31 Mass. App. Ct. 362
    , 368 (1991), citing
    Commonwealth v. Perez, 
    390 Mass. 308
    , 320 (1983).       In Perez,
    
    supra
     at 314 n.3, the judge instructed the jury, "You are
    entitled to weigh this evidence, this testimony of the
    defendant, and you are entitled, of course, in weighing the
    testimony of the defendant, to consider, if you see fit, the
    interest of the defendant in the outcome of the case which is
    before you."    We held that "[w]hile it is not a model charge, we
    conclude that the judge did not impose on the jury his opinion
    of the witness's credibility."     
    Id. at 321
    .
    The same is true here.   While the judge should not have
    stated "the defendant has a bias," taken in context the comment
    did not communicate to the jury the judge's own opinion
    regarding the defendant's credibility.     See Perez, 
    390 Mass. at 321
    .   Rather, it was immediately followed with the reminder,
    stated and then repeated, that the police, too, have a bias, as
    does anyone who works for an agency involved in the case.       Thus,
    even though the defendant's potential bias should not have
    specifically been mentioned, this is not a case where his bias
    was "singled out for special comment."     United States v.
    Rollins, 
    784 F.2d 35
    , 37 (1st Cir. 1986).        Thus, trial counsel's
    failure to object did not amount to a substantial likelihood of
    25
    a miscarriage of justice.20   We emphasize, however, that the
    utmost care is required when instructing the jury about a
    defendant's testimony or failure to testify.   Even an unintended
    suggestion by the judge that the defendant's testimony is
    subject to greater scrutiny risks error.
    iii.   Contradiction between an exhibit and a witness.
    Third, the defendant argues that the judge invaded the fact-
    finding province of the jury by instructing them that if an
    exhibit contradicted a witness, the jury should use the exhibit
    as "[a] reason not to believe a witness."   The instruction was
    as follows:
    "Now, there's another way to look at credibility. Say to
    yourself, you know, I believe something in those exhibits.
    And you know what? What's in those exhibits backs up this
    witness. That's called corroboration. If, on the other
    hand, the exhibit contradicts the witness, what do you use
    that for? A reason not to believe a witness. And go back
    to this, jurors. If someone's being sincere with you, you
    move onto reliability. If someone's insincere and is
    winking at the oath, how can you believe that person? So
    20The defendant also argues that the judge did not inform
    the jury to what extent the defendant's potential bias may have
    influenced his credibility. See United States v. Gleason, 
    616 F.2d 2
    , 15 (2nd Cir. 1979) ("Where the court points out that
    testimony of certain types of witnesses may be suspect . . . it
    must also direct the jury's attention to the fact that it may
    well find these witnesses to be truthful"). While again it
    would have been preferable for the judge to state as much
    explicitly, he did, in his illustration about how one evaluates
    credibility in one's everyday life, state, "you're thinking
    what's in it for him or her. Is there bias? Is there self
    interest? All of that comes into play." This comment showed
    that bias is but one of many factors to be evaluated in
    determining credibility, in addition to, among others, the
    person's demeanor and word choice.
    26
    that is what I would say as to your consideration of
    credibility."
    The defendant argues that this instruction "improperly informed
    the jury precisely what effect certain evidence should have on
    their deliberations" and was particularly prejudicial because
    the Commonwealth had argued in closing that the jury should not
    believe the defendant's testimony, and look instead to
    statements the defendant made in his recorded interview.     Thus,
    the defendant argues the instruction mirrored the Commonwealth's
    theory of the case.
    We disagree.     The judge did not state that exhibits should
    be believed over witness testimony, but rather any
    contradictions could be considered when assessing witness
    credibility.     Moreover, the judge had previously instructed the
    jury that they had "full authority over the evidence," including
    whether to believe or disbelieve some or all of a witness's
    testimony.     Thus, in the context of the instructions as a whole,
    counsel's failure to object to this instruction did not create a
    substantial likelihood of a miscarriage of justice.
    iv.   Jurors should be "controlled" by the video recording
    of the defendant's statement to police.     Fourth, the defendant
    argues that the judge again invaded the fact-finding province of
    the jury when he instructed:
    "You've got a video, jurors. You've got a video of what
    the interview consisted of at the Attleboro police station.
    27
    That's going to be given to you. You're going to have the
    ability to play it. Indeed, you should be controlled by
    it. What he said on the video, you're going to see.
    You're going to see it. If it conflicts with what the
    lawyers said he said, you're going to follow the video."
    The defendant argues that this instruction, like the previous
    one, communicated to jurors that they should give greater weight
    to the defendant's recorded statements to police than to his
    testimony at trial.    The defendant acknowledges that the last
    sentence asks jurors to contrast the video recording with
    statements by lawyers -- which are not evidence -- and states
    that the video evidence should control over what lawyers said
    about the recording.   The defendant nonetheless argues that
    jurors could understand the instruction to mean instead that the
    recording should control "over other evidence and testimony and
    over any misstatements made by the lawyers."
    We disagree.   The instruction clearly refers only to
    comparing the recording to the lawyer's statements, not to
    comparing the recording to other evidence.     While it would have
    been prudent for the judge to say that all the evidence -- not
    just the video recording -- controls over statements by the
    attorneys, the instruction was not error.    In the context of the
    instructions as a whole, a reasonable juror would have
    understood this instruction as referring back to an instruction
    the judge had given before closing arguments:    that lawyers are
    not witnesses and cannot provide information that is not found
    28
    directly or inferentially in the evidence.   Thus, the
    instruction was not error, and consequently trial counsel was
    not ineffective for failing to object.
    v.   Direct and circumstantial evidence.    Fifth, the
    defendant argues that the judge's instruction on the difference
    between direct and circumstantial evidence essentially
    diminished the Commonwealth's burden of proof.    Specifically,
    the judge illustrated the concepts of direct and circumstantial
    evidence by giving two hypothetical examples.    In the first --
    which illustrated direct evidence -- the judge described a
    defendant who was charged with leaving the scene of an accident.
    In the example, a victim felt something strike her car, which
    caused her to hit a tree.   Two days later, a witness told police
    that on the night in question he had been a passenger in a car
    when the driver started to text, struck a car that struck a
    tree, and then drove off.   The witness identified the victim's
    car as the one that had been struck by the defendant's vehicle.
    The judge described the witness's testimony as direct evidence.
    In the second example, which illustrated circumstantial
    evidence, the judge used the same hypothetical, but instead of a
    witness who saw the accident, the evidence came from various
    other sources.   A neighbor who heard the crash stated she saw a
    dark Ford Taurus with a license plate starting with "1-0" leave
    the scene.   The police then searched Registry of Motor Vehicle
    29
    records to identify owners of dark Ford Tauruses with license
    plates starting with 1-0, and found the defendant.     The location
    of the car crash was consistent with the most efficient route of
    travel to the defendant's home.    When police visited the
    defendant's home, they found a Taurus with damage consistent
    with the accident.    Paint chips on the Taurus were consistent
    with the paint from the victim's car.    The defendant admitted to
    driving his Taurus the night of the accident, but denied
    striking a car.
    The defendant first argues that the charge was unbalanced
    because it only illustrated how to infer guilt and not how to
    infer innocence.     See United States v. Dove, 
    916 F.2d 41
    , 46
    (2nd Cir. 1990) (to explain difference between direct and
    circumstantial evidence, trial judge used unbalanced
    hypothetical that "merely instructed how to look for evidence of
    . . . guilt").    We recently analyzed a similar hypothetical by
    the same trial judge in Commonwealth v. Silva, 
    482 Mass. 275
    ,
    286-290 (2019).    There, although we did not explicitly address
    the unbalanced nature of the charge, we held that, taken as a
    whole, the instructions were not error; however, we
    "underscore[d] that, moving forward, . . . it is better practice
    to avoid examples in which hypothetical individuals commit
    crimes."   Id. at 290.    We hold the same here.   See United States
    v. Hensley, 
    982 F.3d 1147
    , 1161 (8th Cir. 2020) (unbalanced
    30
    hypothetical was not error but "discourag[ing] the use of such
    one-sided jury instructions"); United States v. Salameh, 
    152 F.3d 88
    , 142-143 (2d Cir. 1998), cert. denied, 
    526 U.S. 1028
    (1999) (noting unbalanced hypotheticals are "disfavored" but did
    not constitute prejudicial error in circumstances, because most
    circumstantial evidence in case pointed towards guilt).
    Next, the defendant argues that the hypothetical describes
    a situation similar to the facts at trial and thus acted as a
    roadmap showing how to find the defendant guilty.     This argument
    was not raised in Silva because the facts from the hypothetical
    used there did not mirror those of the case.    Here, we are
    troubled that the hypothetical too closely tracks the facts of
    the defendant's case.
    To illustrate this, we compare the two.     The neighbor who
    witnessed a Ford Taurus leaving the scene is akin to the
    neighbor who saw Gumkowski21 in Kilroy's apartment the day of the
    murder.    Investigators visiting the home and finding the
    defendant is akin to investigators arresting Gumkowski at Rose's
    home.     The paint chip on the Taurus consistent with paint from
    the victim's car is akin to the blood on Gumkowski's shoe that
    was consistent with Kilroy's DNA.     The defendant admitting to
    driving the Taurus on the night of the accident but denying
    21Here we refer to Gumkowski by name to distinguish him
    from the defendant in the judge's hypothetical.
    31
    striking the car is akin to Gumkowski admitting to going to
    Kilrow's apartment on the night of the murder but denying
    committing it.
    The hypothetical used in this case is far more similar to
    the facts of the defendant's case than instructions that have
    been objected to on similar grounds.   Compare Commonwealth v.
    Shea, 
    398 Mass. 264
    , 270 & n.3 (1986) (rejecting defendant's
    argument that hypothetical about missing piece of chocolate cake
    too closely paralleled facts of his case); Commonwealth v. Gil,
    
    393 Mass. 204
    , 222 (1984) ("We do not think that the
    coincidental similarity between the well-known 'footprints in
    the snow' example and the evidence of footprints on the floor at
    the scene of the crime would make the jury reasonably believe
    that the judge was expressing his belief in the Commonwealth's
    theory of the case or was favoring a particular inference
    propounded by the prosecutor"); Commonwealth v. Vaughn, 
    32 Mass. App. Ct. 435
    , 443 (1992) ("Although we do not think the judge
    committed reversible error, the similarity of the analogy to the
    Commonwealth's evidence makes use of that particular analogy
    ill-advised in the instant circumstances of this case" [citation
    omitted]); Hensley, 982 F.3d at 1161 (very short hypothetical
    illustrating concept of substantial step "track[ed] closely with
    the facts of [the] defendant's case"); Dove, 
    916 F.2d at
    46
    32
    (hypothetical about "whether Jack shot Mary" was "not analogous
    to the facts of this case").
    In those cases, the illustrations were less in depth than
    the hypothetical used here.    Here, the hypothetical closely
    mirrored the circumstances of the defendant's case and arguably
    served to emphasize the prosecution's theory of the case,
    illustrating to the jurors how they could find the defendant
    guilty.    Thus, the instruction was erroneous.   Consequently,
    trial counsel was ineffective for failing to object.
    Looking at the instructions as a whole, however, the error
    did not create a substantial likelihood of a miscarriage of
    justice.    First, as in Silva, 482 Mass. at 289, the judge made
    clear that the jury could not premise a verdict on speculative
    inferences.22   Second, the judge stated that jurors should not
    take anything he had said to demonstrate his view on the case,
    and that if he had done so unintentionally, they should
    disregard it.23   See Hensley, 982 F.3d at 1160-1161 (judge's use
    22Specifically, the judge stated: "One, you can only draw
    a reasonable inference from evidence that you believe. Two,
    that inference has to be reasonable. In other words, it can't
    be a guess."
    23The judge instructed: "Jurors, I am neutral in this
    case. I have no role in the facts. And if I ever suggested to
    you that I have a view of this case, that's arrogant on my part.
    That is not something I want to convey. I respect you; and if I
    did that unconsciously, you disregard it."
    33
    of hypothetical similar to facts case not reversible error
    because judge also instructed that jury "should not take
    anything I have said or done during the trial as indicating what
    I think of the evidence or what I think your verdict should
    be").     Third, the hypothetical did not infringe on the
    instructions on reasonable doubt.     Compare Silva, supra (judge's
    hypothetical to explain circumstantial evidence entirely
    separate from "unambiguous and adequate instruction on
    reasonable doubt"), with Commonwealth v. Pomerleau, 
    10 Mass. App. Ct. 208
    , 214 (1980) (use of examples to explain reasonable
    doubt was reversible error).     Fourth, it is clear from a review
    of the entire record that the judge was scrupulously focused on
    the defendant receiving a fair trial.     And finally, the
    Commonwealth's case against the defendant was strong, and thus
    any error was likely not to have influenced the jury's verdict.
    Cf. Commonwealth v. Garcia, 
    379 Mass. 422
    , 442 (1980) (error in
    jury instructions was harmless where "case involve[d]
    overwhelming evidence of guilt").24    In sum, although the
    24In Silva, 482 Mass. at 288, an additional mitigating
    factor was that the jury did not convict on a theory of
    deliberate premeditation, which showed "they understood the high
    degree of certainty required to find the defendant guilty."
    While here, similarly, the jury did not convict on either
    deliberate premeditation or felony murder, we do not believe
    this fact mitigates the error in the jury instructions. The
    erroneous hypothetical did not speak to the hypothetical
    defendant's intent or any underlying felony, so there is no
    34
    instruction -- and counsel's subsequent failure to object --
    were error, those errors did not create a substantial likelihood
    of a miscarriage of justice.
    vi.   Reasonable inferences.     Sixth, the defendant argues
    that at the close of the hypothetical illustrating
    circumstantial evidence, the judge insinuated an inference of
    guilt would be reasonable.     At the close of the hypothetical,
    the judge stated:   "And in this instance, you could be asked do
    you draw a reasonable inference that the defendant [in the
    hypothetical] did this.   And in looking at that question, you
    certainly can apply your common sense, your powers of logic."
    The defendant argues that a juror would likely understand
    this instruction as implying that any inference they might draw
    of the defendant's guilt would be a reasonable one.     Although we
    have made our concerns with the hypothetical clear, we do not
    think this closing element created a substantial likelihood of a
    miscarriage of justice.   While the words may have subtly implied
    that such an inference would be reasonable, a reasonable jury
    would not have interpreted them as "a conclusive direction by
    [the judge] to find murder in the first degree once the jury
    were convinced of the [underlying] facts."     Commonwealth v.
    Skinner, 
    408 Mass. 88
    , 95 (1990).     Compare 
    id.
     at 94-95
    reason it would have affected the jury's fact finding concerning
    the elements of deliberate premeditation or felony-murder.
    35
    (reversible error where judge instructed "not only that [the
    jury] could infer premeditation from certain subsidiary facts
    and malice, but that the finding of those facts and malice
    'would constitute first-degree murder'").
    vii.   Drawing of inferences.     Seventh, the defendant argues
    that the judge's instructions on inferences implied that intent
    had to be proved beyond a reasonable doubt, but the other
    elements of the crime did not.   The judge instructed:
    "And here are the rules that apply to drawing a reasonable
    inference. One, you can only draw a reasonable inference
    from evidence that you believe. Two, that inference has to
    be reasonable. In other words, it can't be a guess.
    Three, that where the inference constitutes an element of
    the crime -- intent. Intent, which I told you can well be
    the subject of circumstantial evidence -- it has to be
    proven beyond a reasonable doubt."
    Looking at the jury instructions as a whole, it is clear that
    the judge properly instructed the fact that proof beyond a
    reasonable doubt is necessary for every element of the offense.
    As the judge outlined the elements of each charged crime, he
    repeatedly emphasized that the Commonwealth had the burden to
    prove each element beyond a reasonable doubt.    Thus, a
    reasonable juror would have understood the challenged
    instruction to show that intent is one example of an element
    that must be proved beyond a reasonable doubt, not that it was
    the only one.   There was no error.
    36
    c.   Relief pursuant to G. L. c. 278, § 33E.   We have
    reviewed the record in accordance with our statutory duty under
    G. L. c. 278, § 33E, and we identify no basis upon which to
    order a new trial or to reduce the degree of guilt.
    Judgment affirmed.