Commonwealth v. Don ( 2019 )


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    SJC-11550
    COMMONWEALTH   vs.   AMOS DON.
    Suffolk.       September 10, 2019. - December 20, 2019.
    Present:    Gants, C.J., Lenk, Lowy, Cypher, & Kafker, JJ.
    Homicide. Evidence, Medical record, Cross-examination, Expert
    opinion, Third-party culprit, Prior misconduct. Practice,
    Criminal, Postconviction relief, Assistance of counsel,
    Capital case.
    Indictments found and returned in the Superior Court
    Department on March 30, 2010.
    The cases were tried before Christine M. McEvoy, J.; a
    motion for postconviction relief, filed on April 25, 2017, was
    considered by Peter M. Lauriat, J., and a motion for
    reconsideration was considered by Christine M. Roach, J.
    Chauncey B. Wood for the defendant.
    Kathryn E. Leary, Assistant District Attorney (Ian
    Polumbaum, Assistant District Attorney, also present) for the
    Commonwealth.
    KAFKER, J.    On August 25, 2009, Erica Field and Shameek
    Garcia were shot in the head at close range as they sat in a
    parked vehicle in a lot in the Dorchester section of Boston.
    2
    Garcia survived; Field did not.     A jury convicted the defendant,
    Amos Don, of murder in the first degree on the theory of
    deliberate premeditation, and related charges, in connection
    with the shootings.1    Before us is the defendant's consolidated
    appeal from his convictions, from the denial of his motion for a
    new trial, and from the denial of a motion to reconsider the
    denial of his new trial motion.     On appeal, the defendant makes
    three primary claims:    (1) that newly discovered medical records
    warrant a new trial, or at least an evidentiary hearing on the
    defendant's postconviction motions; (2) that trial counsel was
    constitutionally ineffective (on several grounds, discussed
    infra); and (3) that the trial judge committed reversible error
    in admitting evidence of the defendant's prior, failed attempts
    to purchase a firearm.     For the reasons discussed infra, we
    reject the defendant's arguments, we affirm his convictions and
    the denial of his postconviction motions, and we decline to
    grant extraordinary relief pursuant to G. L. c. 278, § 33E.
    Background.   1.    Facts.   We summarize the facts the jury
    could have found, reserving certain topics for later discussion.
    In the summer of 2009, the murder victim, Field, was living in
    1 In addition to the conviction for Field's murder, the
    defendant was convicted of armed assault with intent to murder
    and aggravated assault and battery by means of a dangerous
    weapon in connection with Garcia's shooting, as well as
    unlicensed possession of a firearm.
    3
    Lewiston, Maine, with her eleven year old daughter, Monica, and
    her long-term boyfriend, Garcia, who was also known as "JoJo."
    In early August of that year, Field and Garcia met the
    defendant, whom they knew as "Ace," at a house in Lewiston where
    people would go to buy drugs.
    The defendant had traveled to Lewiston from his home in
    Boston in order to sell cocaine and heroin.   Garcia and the
    defendant began to work together, as Garcia knew the Lewiston
    illegal drug market and the defendant did not.    This was mainly
    in connection with the defendant's efforts to sell cocaine, as
    Garcia was less familiar with the market for heroin.     Garcia
    also arranged for the defendant to stay in a spare bedroom in
    the home of Donald and Deann Dyer in Lewiston in exchange for
    cocaine.    The defendant kept his supply of cocaine and heroin in
    his bedroom at the Dyers' home.
    In early August 2009, the defendant attempted to have a
    woman named Christine Gilleland purchase three firearms from a
    gun shop in Poland, Maine.   However, her application to purchase
    the firearms was denied.
    About a week before the murder, the defendant discovered
    that his supply of heroin -- for which he still owed his Boston
    suppliers about $6,000 -- was missing.    The defendant initially
    blamed Samantha Leonard, a heroin user and a friend of Field and
    Garcia.    Leonard had recently spent time with the defendant in
    4
    his bedroom, and when the two were leaving, she had made a point
    of returning to the room alone to retrieve her cellular
    telephone.   The defendant told Garcia "that if it took him a
    year or two, he'd put that bitch [Leonard] in a box."     The next
    day the defendant confronted Leonard about the missing heroin,
    telling her in a "very scary" tone that he "wanted his shit."
    Leonard told the defendant "he was looking at the wrong person
    that was sitting there smoking his money," referring to Garcia.2
    Around this time, the defendant made a second attempt to
    purchase a firearm, this time from Stephen Waterman.    Waterman
    sold the defendant a .45 caliber semiautomatic with a missing
    clip.    The defendant asked Waterman if he could put a bullet in
    the chamber without the clip; Waterman said no.    Waterman told
    the defendant that a clip had been ordered and was waiting at a
    gun shop, but when the defendant went with Deann Dyer to the gun
    shop to retrieve it, the clip could not be located.     The
    defendant also asked an employee of the gun shop whether a
    bullet could be loaded in the chamber manually, without a clip;
    the employee said it could not.
    2 Leonard was frightened about what the defendant might do
    to her, prompting her to tell the police that the defendant had
    threatened her with a gun. Leonard later admitted that she lied
    about the defendant having a gun because she wanted the police
    to take her report of the threats more seriously.
    5
    Shortly after that, the defendant and Garcia discussed
    traveling to Boston so that the defendant could refill his
    supply of cocaine and try to get an extension to pay his
    supplier back for the missing heroin.     Garcia borrowed a red
    Ford sedan from an acquaintance in exchange for some cash and
    cocaine.   Because Garcia did not have a valid driver's license,
    Garcia and the defendant decided that Field should accompany
    them.
    On August 25, 2009, the three drove from Lewiston to Boston
    in the red Ford sedan.   Upon arriving in Boston, they went to
    the defendant's home.    The defendant spent some time on the
    telephone trying to contact his suppliers.    A few hours later,
    the defendant said he had "found somebody," and they got in the
    red Ford and began driving to a different location.     Garcia
    drove, with Field in the front passenger seat and the defendant
    in the rear driver's side seat.    The defendant told Garcia where
    to go, and at some point, they began following a silver sedan.
    During this time, Garcia gave the defendant the cash that he had
    brought to spend on the cocaine.
    The two vehicles came to a stop in a lot on Norwell Street.
    The defendant got out of the red vehicle and got into the back
    seat of the silver vehicle.   He stayed in the silver vehicle for
    a few minutes before returning to the red Ford and getting in
    the back seat on the driver's side.     The last thing Garcia
    6
    remembers is turning to his right toward the back seat and
    asking the defendant if they were "all set."
    People in a nearby house heard three gunshots ("pop, pop,"
    then a pause, then "pop") and called the police.   Sergeant
    Detective Sean Doherty responded to a call for shots fired at
    the lot on Norwell Street.   Upon arriving, he observed Garcia
    standing in the doorway of the front driver's side door of the
    red Ford.   Garcia walked around the front of the vehicle to the
    front passenger side and dove head first onto Field's lap.
    Field appeared nonresponsive.   Garcia then fell out of the
    vehicle onto his knees and fell backward onto the ground.
    Doherty asked Garcia, "Who shot you?"    Garcia said, "Ace."
    Doherty then asked what Ace's real name was and where he lived.
    Garcia kept repeating the word, "Ace."   His mouth then began to
    fill with blood.   Doherty stopped asking questions at that point
    because "[he] realized [he] wasn't going to get any different
    response from [Garcia] and based on his condition, there was no
    need to go any further."
    A review of cellular telephone records, including cell site
    location information, confirmed that the defendant traveled from
    Maine to Boston on August 25, and that, once in Boston, he
    traveled from the neighborhood where he lived to the area of the
    crime at the time of the murder.   Fingerprint analysis of the
    red Ford showed two of the defendant's fingerprints on the rear
    7
    driver's side window.   Ballistics evidence showed that a bullet
    recovered from Field's body and one recovered from the front
    passenger's side door of the red Ford were fired from the same
    firearm.
    The medical examiner, Mindy Hull, testified about Field's
    gunshot wounds.   Wounds to Field's left hand and left nostril
    could have been caused by a single bullet as Field held her left
    hand up to her face.    A second bullet entered Field's head
    behind her left ear, passed through the temporal bone of her
    skull and through the left side of the cerebellum, bisecting her
    brain stem (the bullet fragmented during this time), until the
    major portions of the bullet came to a stop in the right side of
    the cerebellum.   Hull testified that the wounds to Field's nose
    and hand showed "stippling," and that the wound behind Field's
    left ear had "soot deposition," indicating that the firearm was
    shot within two or three feet of the victim.3
    Based on a review of medical records, Hull also discussed
    Garcia's injuries, explaining that Garcia suffered "multiple
    maxilla facial fractures" to the right side of his face and
    "traumatic contusion of the right temporal lobe" of his brain.
    A portion of Garcia's medical records themselves were admitted
    3 Hull testified that, with respect to the maximum distance
    for stippling to occur, she always answers "broadly in the sense
    of . . . a couple or a few feet," even though "textbooks will
    say about eighteen inches."
    8
    in evidence.   Those records describe his injuries as "Principle
    Diagnosis: GSW to face," and "GSW to right face."    The records
    also describe Garcia as having been "shot in the head" with
    "bullet fragments within the sinus and nasal cavities."
    In the days following the murder, the defendant displayed
    consciousness of guilt through his words and actions.     The
    defendant's cellular telephone was on his sister-in-law's
    account.   On August 26, the defendant asked his sister-in-law to
    change his telephone number, telling her that he was being
    harassed by his son's mother, Fabiola Ramponeau.    The day after
    the murder, the defendant visited Ramponeau at work and brought
    her sneakers for their son that he had bought during the trip
    down from Lewiston.   He also stayed with Ramponeau twice during
    the week after the murder.
    When Misty Deschaine, a close friend of Field's, called the
    defendant on the day of the murder to find out what had happened
    to Field and Garcia, the defendant denied knowing who Field and
    Garcia were.   Over the subsequent days, Deschaine continued to
    call the defendant; at one point, she confronted him about the
    murder, and he stated, "you cannot play with someone else's
    money . . . or something bad will happen."
    Separately, when confronted by Gilleland about whether he
    had shot Garcia and Field, the defendant responded, "they would
    have to prove it"; and after Gilleland told him she might be
    9
    pregnant with his child, he told her that "[she] didn't want to
    have a kid with somebody like him cause [she] knew what type of
    person that he was, and that he could end up doing life in jail"
    and that "he might have to kill innocent people."
    A grand jury indicted the defendant for murder in violation
    of G. L. c. 265, § 1; aggravated assault and battery by means of
    a dangerous weapon, in violation of G. L. c. 265, § 15A (b);
    armed assault with intent to murder, in violation of G. L.
    c. 265, § 18 (b); and unlicensed possession of a firearm, in
    violation of G. L. c. 269, § 10 (a).   Following a jury trial,
    the defendant was convicted on all four indictments.    As to
    Field's killing, the jury convicted the defendant of murder in
    the first degree on a theory of deliberate premeditation.     The
    judge sentenced the defendant to life in prison for the murder
    and to concurrent sentences of from thirteen to fifteen years
    for the aggravated assault and battery, from fifteen to twenty
    years for the armed assault with intent to murder, and from four
    years to four years and one day for the unlicensed possession of
    a firearm.
    2.   Postconviction proceedings.   The defendant timely
    appealed, and postconviction counsel was appointed.    On April
    27, 2017, the defendant filed a motion for a new trial in this
    court, which was remanded to the Superior Court.    In the motion,
    the defendant argued that his trial counsel provided
    10
    constitutionally ineffective assistance for three main reasons:
    (1) the failure to utilize evidence that Garcia was an informant
    to rebut the prosecutor's argument that no one other than the
    defendant had a motive to shoot Garcia; (2) the failure to
    challenge the reliability of Garcia's statements to the police
    immediately after being shot in the head; and (3) the failure to
    challenge expert testimony presented by the Commonwealth
    regarding the trajectory of a bullet that became lodged inside
    the front passenger's side door of the vehicle in which the
    victims were seated.
    After filing the motion, postconviction counsel noticed
    that one of the Commonwealth's pretrial discovery notices
    suggested that more medical records existed than those that had
    been produced to the defendant.    Postconviction counsel alerted
    the Commonwealth, which determined that its file contained the
    same, underinclusive set of records that had already been
    produced to the defendant.     Postconviction counsel moved for
    discovery of the additional records.    On October 13, 2017, the
    regional administrative justice ordered production of Garcia's
    outstanding medical records.    Three days later, the case was
    assigned to another Superior Court judge (motion judge) for
    resolution of all postconviction motions.
    On November 13, 2017, the defendant received notice that
    the requested records had arrived in the clerk's office.    On
    11
    November 29, 2017, the motion judge issued a memorandum and
    order denying the defendant's new trial motion.
    On January 25, 2018, postconviction counsel filed a motion
    for an emergency status hearing and a motion to reconsider the
    motion judge's decision in light of new evidence.    The regional
    administrative justice indicated that she would deem the motion
    timely filed and would hear it, because the motion judge had
    retired.
    In a supplemental brief, the defendant argued that "newly
    discovered" medical records provided material, exculpatory
    evidence undermining the Commonwealth's theory that the
    defendant shot the victims from the back seat of the vehicle in
    which they were seated.   The defendant also bolstered his
    argument that trial counsel had been ineffective in failing to
    establish that third parties had a motive to shoot Garcia, using
    evidence gathered through postconviction interviews.
    The regional administrative justice considered the
    additional evidence offered by the defendant and denied the
    motion to reconsider without granting an evidentiary hearing.
    The defendant appealed.   The defendant's direct appeal was
    consolidated with the appeals from the denial of his motion for
    a new trial and his motion for reconsideration.     On appeal, the
    defendant presses all the claims raised in his postconviction
    motions and further argues that the trial judge committed
    12
    reversible error in admitting evidence of the defendant's prior,
    failed attempts to purchase firearms that could not have been
    the murder weapon.
    Discussion.      1.   "Newly discovered" medical records.   Prior
    to trial, the Commonwealth issued a subpoena to Boston Medical
    Center (BMC) for "all medical records for Shameek Garcia."        In a
    certification dated November 16, 2009, BMC indicated that it was
    producing over 1,000 pages of records in response to the
    subpoena.    The Commonwealth in turn produced a set of Garcia's
    medical records to the defendant in pretrial discovery.        At the
    time of trial, neither defense counsel nor the prosecution
    noticed any discrepancy between the number of pages produced and
    the number of pages indicated in the certification.     Upon
    reviewing these same materials after trial, postconviction
    counsel noticed that the defendant's trial file contained only
    about 600 pages of medical records from BMC, rather than the
    over 1,000 pages indicated on the certification.     Postconviction
    counsel alerted the Commonwealth, which determined that it had
    the same, underinclusive set of records possessed by the
    defendant.    With court permission, postconviction counsel made a
    new request for discovery from BMC.     This time, BMC produced
    over 2,000 pages of records.
    The defendant argues that the medical records obtained by
    postconviction counsel constitute "newly discovered" evidence
    13
    warranting a new trial under the standard set forth in
    Commonwealth v. Grace, 
    397 Mass. 303
    , 305–306 (1986).     We
    disagree.   In order to constitute "newly discovered" evidence
    under Grace, the records must have been "unknown to the
    defendant or his counsel and not reasonably discoverable by them
    at the time of trial."   
    Id. at 306.
      This requirement is not
    satisfied where postconviction counsel was alerted to the
    missing records by reviewing the same set of documents that was
    available to trial counsel.    However, as the defendant suggests,
    this merely begs the question whether trial counsel was
    ineffective for failing to obtain the additional records.      We
    turn to that question next.4
    2.   Ineffective assistance of counsel.   Where a defendant
    has been convicted of murder in the first degree, "we review for
    a substantial likelihood of a miscarriage of justice by asking
    whether there was error and, if so, whether the error was likely
    to have influenced the jury's conclusion" (quotations and
    4 In any event, for the same reasons discussed infra that we
    conclude that this oversight by trial counsel did not create a
    substantial likelihood of a miscarriage of justice, we also
    conclude that, even if the evidence were deemed "newly
    discovered," the defendant would be unable to satisfy Grace's
    additional requirement that the evidence "cast[] real doubt on
    the justice of the conviction." 
    Grace, 397 Mass. at 305
    . In so
    doing, we do not consider whether Grace's second prong is more
    or less favorable to a defendant than the "substantial
    likelihood of a miscarriage of justice" standard under
    G. L. c. 278, § 33E. We merely conclude that on these facts,
    neither standard is satisfied.
    14
    citation omitted).    Commonwealth v. Barnett, 
    482 Mass. 632
    , 638
    (2019).   See Commonwealth v. Ayala, 
    481 Mass. 46
    , 62 (2018);
    Commonwealth v. Wright, 
    411 Mass. 678
    , 682 (1992), S.C., 
    469 Mass. 447
    (2014).    We apply this standard "even if the action by
    trial counsel does not constitute conduct 'falling measurably
    below that . . . of an ordinary fallible lawyer.'"    Commonwealth
    v. Gonzalez, 
    443 Mass. 799
    , 808-809 (2005), quoting Commonwealth
    v. MacKenzie, 
    413 Mass. 498
    , 517 (1992).    This standard is more
    favorable to a defendant than the constitutional standard for
    ineffective assistance of counsel under Commonwealth v.
    Saferian, 
    366 Mass. 89
    , 96 (1974).   See 
    Ayala, supra
    .    In
    conducting this review, we "accord tactical decisions of trial
    counsel due deference" (quotation and citation omitted).
    Commonwealth v. Evans, 
    439 Mass. 184
    , 195, cert. denied, 
    540 U.S. 923
    and 
    540 U.S. 973
    (2003).    "Unless such a decision was
    manifestly unreasonable when made, we will not find
    ineffectiveness" (quotation and citation omitted).    Id at 195-
    196.
    Here, the defendant's claims of ineffective assistance
    center around the fact that trial counsel did not cross-examine
    the Commonwealth's primary expert witnesses, nor did he offer
    any expert testimony on behalf of the defense.    In his affidavit
    in support of the defendant's motion for a new trial, trial
    15
    counsel stated that he "believed that the forensic evidence was
    not helpful to the defense so [he] tried to stay away from it."
    Consistent with the standard just described, we do not
    dwell on whether in making this decision, trial counsel's
    performance "[fell] measurably below that . . . of an ordinary
    fallible lawyer" (citation omitted).     
    Gonzalez, 443 Mass. at 809
    .   Rather, for the reasons discussed infra, we conclude that,
    in the circumstances presented here, any error in failing to
    challenge the Commonwealth's expert evidence did not create a
    substantial likelihood of a miscarriage of justice.    We address
    each of the defendant's individual claims of ineffective
    assistance of counsel in turn.
    a.   Failure to obtain Garcia's complete medical records or
    to present expert testimony that Garcia was shot in the interior
    of the mouth.    In arguing that reversal is warranted based on
    the failure to obtain Garcia's complete medical records, the
    defendant primarily relies on the fact that certain radiology
    reports were omitted from the set of records produced prior to
    trial, which would have supported expert testimony that Garcia
    was shot in the interior of the mouth, not the back of the head
    or the side of the face.     In support of this argument, the
    defendant submitted the affidavit of Edward T. McDonough, III,
    stating that, based on the radiology reports and other records,
    Garcia "suffered a gunshot wound to the head, specifically,
    16
    entering through the mouth."   McDonough further opined that
    "[a]ssuming [Garcia] was sitting normally in the driver's seat,
    facing forward," it would be "extremely difficult" for a shooter
    sitting "directly behind" the driver to have caused the injuries
    observed.   This proffered testimony, the defendant maintains,
    "disproves" the Commonwealth's theory of the case and warrants a
    new trial, or at least an evidentiary hearing on the defendant's
    motion for a new trial.
    After a thorough review of the medical records available at
    trial and those produced posttrial, we are not persuaded.
    First, the upshot of the information contained in the radiology
    reports produced posttrial -- indicating that Garcia was shot in
    the interior of the mouth -- was also present in the records
    that were available to defense counsel at the time of trial.5
    Second, and perhaps more importantly, it was not essential to
    the Commonwealth's theory of the case that the defendant be
    seated "directly behind" Garcia, with Garcia "facing forward,"
    when the shooting occurred.    Testimony at trial indicated that
    5 Many of the records refer to the fact that Garcia was shot
    "in," "to," or "through" the "mouth." One record states that
    the gunshot wound was "to face . . . entry in mouth . . . no
    exit wound"; another notes that Garcia had blood coming from the
    mouth and nose with "no visible entry/exit wound"; and a third
    notes a possible "self-inflicted gunshot wound mouth [sic]."
    Once again, this merely begs the question whether trial counsel
    was ineffective for not consulting an expert based on the
    records available to him prior to trial.
    17
    the defendant sat in the seat behind the driver's seat on the
    way to the lot where the shooting occurred, that he got out of
    the vehicle for a period of time, and that he reentered the
    vehicle through the rear driver's side door immediately prior to
    the shooting.
    The jury could reasonably have inferred that someone
    entering the back seat of the vehicle with the intention of
    shooting the two people seated in the front seats would position
    himself in the center of the back seat, directly behind the gap
    between the two seats.   Photographs admitted in evidence support
    that such positioning was both reasonable and possible.6    See
    
    Evans, 439 Mass. at 200
    , citing Commonwealth v. Marquetty, 
    416 Mass. 445
    , 452 (1993) ("An inference need not be inescapable,
    just reasonable and possible").   Such positioning is consistent
    with Garcia's testimony that he turned to his right, toward the
    back of the vehicle, before he was shot, and it is consistent
    with McDonough's opinion that when Garcia was shot, the bullet
    entered his mouth and "fragment[ed] inside his right facial
    area."   Such positioning is also consistent with evidence that
    6 More specifically, one exhibit shows the back seat of the
    red Ford as viewed through the open rear driver's side door.
    Although a shopping bag, toys, and other debris fill the seat
    directly behind the front passenger seat in which Field was
    seated, the photograph shows that no debris was blocking someone
    from sliding from the rear driver's side seat into the center of
    the rear seat, directly behind the gap between the two front
    seats.
    18
    Field was shot in her left hand and nostril and behind her left
    ear.
    Thus, McDonough's proffered testimony that "[a]ssuming
    [Garcia] was sitting normally in the driver's seat, facing
    forward," it would be "extremely difficult" for a shooter
    sitting "directly behind" the driver to have caused Garcia's
    injuries would have done little to undermine the Commonwealth's
    ultimate theory of the case.7   Moreover, the circumstantial
    evidence against the defendant in this case was overwhelming.
    Cellular telephone records placed the defendant at the scene of
    the crime; he had a strong motive for killing Garcia and Field
    (to repay his suppliers and ensure that someone other than he
    suffered the consequences for the missing heroin); and his
    statements and actions following the murder displayed
    consciousness of guilt.    The strength of this evidence, viewed
    in conjunction with the limitations of McDonough's proffered
    testimony, 
    discussed supra
    , lead us to conclude that the
    proffered testimony would have been unlikely to have changed the
    jury's conclusion.
    Similarly, the proffered expert testimony of a ballistics
    7
    expert, discussed infra, identifying another possible, but "less
    likely" possibility -- that the shooter was positioned outside
    the vehicle -- would have been unlikely to have influenced the
    jury's decision.
    19
    In sum, there was no substantial likelihood of a
    miscarriage of justice arising from trial counsel's failure to
    procure largely redundant medical records, or to present expert
    testimony "disproving" a particular factual scenario that was
    not essential to the Commonwealth's theory of the case.     See
    Commonwealth v. Morgan, 
    449 Mass. 343
    , 358 (2007) (no
    substantial likelihood of miscarriage of justice arising from
    failure to cross-examine Commonwealth's expert or to call
    defense expert where defense expert's testimony "likely would
    not have influenced the jury's ultimate conclusion").     See also
    Commonwealth v. DiBenedetto, 
    475 Mass. 429
    , 439-441 (2016)
    (factual basis for defendant's claim that particular evidence
    was "powerfully exculpatory" not borne out by trial record).
    b.   Failure to consult an expert to challenge Garcia's
    ability to respond to police questions.   The defendant next
    claims that trial counsel was ineffective for failure to consult
    an expert to challenge the inference that Garcia's utterance of
    the word "Ace" after being asked "Who shot you?" constituted a
    "reliable answer" to that question.   In support of his motion
    for a new trial, the defendant submitted the affidavit of a
    neurologist, Ryan Darby, who opined that the head injuries
    Garcia suffered "affect decision-making ability" and that
    "answering a question reliably is a form of decision-making."
    Based on Doherty's testimony that Garcia was not responding
    20
    appropriately to many of his questions, Darby would have
    testified that "it is not clear that [Garcia] was responding at
    all to Sergeant Doherty's first question, 'Who shot you?'"
    Darby would have further opined that "[i]t is possible that as a
    result of perseveration, [Garcia] was simply repeating the last
    word he had spoken prior to being shot and that the statement
    'Ace' had no causal connection to Sergeant Doherty's question."
    The Commonwealth argues that this testimony would have been
    inadmissible, as it would have invaded the province of the jury
    to assess credibility.   Even assuming its admissibility (an
    issue that we do not decide), we conclude that the proffered
    testimony would have been unlikely to influence the jury's
    ultimate conclusion, given that it would have only incrementally
    advanced a defense theory that was already before the jury, and
    given the strength of the circumstantial evidence against the
    defendant.8
    The jury were already presented with testimony about
    Garcia's inability to answer Doherty's questions appropriately
    and with evidence that Garcia had suffered severe injuries to
    his brain.    This testimony enabled defense counsel to argue in
    closing:
    8 Similarly, trial counsel's failure to introduce evidence
    that a police report described Garcia as "mumbling incoherently"
    is unlikely to have altered the jury's conclusion.
    21
    "[The word 'Ace' is] an answer correctly to one question
    only. So there is the possibility based on the testimony
    of Sergeant Doherty and based on your review of the medical
    records of Mr. Garcia that you will see and based up[on]
    his testimony and your observations of him that he just
    couldn't remember, just couldn't remember. . . . So when
    Mr. Garcia answered the word 'Ace' to Sergeant Doherty, he
    really I suggest most respectfully when you look at
    everything you can't rely on what the answer was that Mr.
    Garcia [gave] to that particular series of questions, the
    same one, at that particular time especially now based on
    the testimony of Mr. Garcia that he cannot remember
    anything that happened after Ace got back into the car on
    August 25, 2009."9
    While the proffered expert testimony could have strengthened
    this argument incrementally, by providing a medical explanation
    for why "Ace" was not an answer to the question "Who shot you?,"
    such testimony ultimately would have been unable to draw the
    sting out of the fact that the defendant's name was the word
    Garcia repeated over and over again moments after he was shot.
    In particular, it would not have diminished (and indeed, it
    might have increased, through the introduction of the concept of
    perseveration) the likelihood that the jury would infer that
    Garcia was repeating the word "Ace" because the last thing he
    saw before he was shot was the defendant pointing a gun in his
    9 On appeal, the defendant makes much of the fact that trial
    counsel "conceded" that Garcia "correctly" answered Doherty's
    first question. We think it clear that trial counsel did not
    concede this point but was instead urging the jury not to rely
    on that statement. In context, the word "correctly" only meant
    that the answer could have been considered responsive to the
    question. The answer could not even have been considered
    responsive to the other questions asked by the officer.
    22
    face.   Adding to that the other strong circumstantial evidence
    against the defendant, 
    discussed supra
    , we conclude that trial
    counsel's failure to call a neurological expert did not create a
    substantial likelihood of a miscarriage of justice.     See 
    Morgan, 449 Mass. at 358
    .
    c.      Failure to challenge the Commonwealth's ballistics
    evidence.    The defendant also argues that his trial counsel was
    ineffective for failing to challenge the Commonwealth's
    ballistics evidence, either through cross-examination or through
    countervailing expert testimony.     The Commonwealth's expert,
    Kevin Kosiorek, testified that the bullet recovered from the
    passenger door was traveling at a diagonal angle from the rear
    of the vehicle to the front.     Kosiorek qualified this testimony
    with the observation that his conclusion was approximate, with
    an error rate "usually a plus or minus of [five] degrees."
    Kosiorek also acknowledged that he was unable to say "one way or
    another" whether the bullet might have been deflected before it
    struck the door, and he could not say what the "original path"
    of the bullet might have been.
    The defendant argues that trial counsel should have
    consulted an expert, who could have offered trajectory evidence
    to undermine an inference that the shots were fired from the
    back seat of the vehicle.     More specifically, in support of his
    motion for a new trial, the defendant submitted the affidavit of
    23
    Gregory A. Danas, who stated that "[i]n [his] opinion, it is
    reasonably possible that the shots fired in this case originated
    from someone standing outside the car.   It is also reasonably
    possible that the shots were fired from two different shooters."
    As to Kosiorek's analysis, Danas merely pointed out the same
    shortcomings that Kosiorek had already acknowledged ("[I]t is my
    opinion that [Kosiorek's] conclusion at trial about trajectory,
    is, as he stated, only an approximation.   It is virtually
    impossible to determine the actual true trajectory of the
    recovered bullet in this case, given the known obstructions and
    unknown changes in [Field's] body position.").   Danas added
    that, given that uncertainty, "there is a reasonable possibility
    that the bullet shot toward [Field] and coming to rest inside
    the door frame was fired from a firearm whose muzzle was located
    at, or partially within, the threshold of the rear driver-side
    window.   While less likely, it is also possible that [Field] was
    shot by someone standing immediately outside the front driver-
    side window."10
    10Danas also suggested that gunpowder residue testing could
    have established with more certainty whether the bullets were
    fired from inside or outside the vehicle, but it is mere
    speculation what the results of such testing would have been.
    And in any event, Danas did not address the evidence of
    stippling and soot deposition on Field's wounds, which suggested
    the bullets that injured her were fired at short range.
    24
    For reasons similar to those 
    discussed supra
    with respect
    to McDonough's proffered testimony, we are of the view that such
    testimony would have been unlikely to alter the jury's ultimate
    conclusion.   Merely offering the possibility of another
    scenario, based on an incomplete accounting of the evidence, is
    insufficient to meet the defendant's burden to show that the
    proffered evidence "was likely to have influenced the jury's
    conclusion" (citation omitted).   
    Barnett, 482 Mass. at 638
    , 640
    (holding that in face of strong circumstantial evidence against
    defendant, defense counsel's failure to engage in "battle of the
    experts" over certain marginally relevant DNA evidence "would
    not have been so significant as to influence the jury's
    verdicts").   Contrast Commonwealth v. Hill, 
    432 Mass. 704
    , 719
    (2000) ("Evidence that contradicted the Commonwealth's entire
    theory of the case could have raised a reasonable doubt in the
    jurors' minds").   There was no substantial likelihood of a
    miscarriage of justice.
    d.   Failure to utilize evidence that Garcia was an
    informant, or to conduct further investigation, in support a
    third-party culprit defense.   The defendant argues that his
    trial counsel was constitutionally ineffective for failing to
    utilize evidence that Garcia was an informant for the Federal
    Drug Enforcement Administration (DEA), or to develop further
    25
    evidence through witness interviews, in support of a third-party
    culprit defense.
    Before trial, the prosecutor disclosed materials to defense
    counsel revealing Garcia's status as a paid DEA informant.      The
    materials were under a protective order, and defense counsel did
    not move to lift the protective order prior to trial.    During a
    hearing on motions in limine, upon a request by the prosecutor,
    the trial judge instructed that defense counsel should consult
    with him at sidebar in the event defense counsel wanted to admit
    any evidence of Garcia's status as an informant.    Defense
    counsel agreed.    However, the topic was not brought up during
    trial.    In addition, before trial, defense counsel received
    other discovery from the Commonwealth, arguably suggesting a
    potential third-party culprit defense.11   Admittedly, trial
    11James Lee, a Lewiston resident familiar with Garcia,
    testified at the grand jury that he was worried about Garcia
    days before the shooting and that Garcia had said he (Garcia)
    "had to go out of town" and would not be coming back. A second
    individual, Jalissa Garcia, also stated to police that Amber
    Dyer, another Maine resident, had called Garcia's family in
    Florida days after the shooting looking for Garcia, stating that
    Garcia had told her he was moving to Florida and could be
    reached there. A third individual, Rodney Jackson, said to
    police that he heard "on the streets" that three young people
    with ties to the Four Corners or Algonquin areas in Maine had
    shot Garcia and Field. A fourth individual, Jenna Labbe, stated
    to police that Nick Coy, another Maine resident, had claimed to
    her that "one of his boys" had shot the victims. However, Labbe
    also stated that she did not believe Coy had been telling the
    truth because "he is just a little punk."
    26
    counsel did not follow up on this information or interview any
    of these individuals.   However, for the reasons discussed infra,
    we conclude that the failure to further develop a more specific
    third-party culprit defense did not create a substantial
    likelihood of a miscarriage of justice.12
    In support of his motion for reconsideration, the defendant
    submitted the affidavit of Jason Angus, detailing an
    investigation performed at the behest of postconviction counsel.
    More specifically, Angus spoke with Rodney Jackson, James Lee,
    and Christine Gilleland.   Jackson and Gilleland said that Garcia
    had a reputation for short-changing his suppliers.   Lee,
    Jackson, and Gilleland also told the investigator that Garcia
    had a specific reputation for being a suspected informant.    They
    also said that it was common knowledge in the Lewiston drug
    community that Garcia planned to drive down to Boston on August
    25, 2009.
    We agree with the motion judge that this evidence falls
    short of meeting the defendant's burden on a motion for a new
    trial to establish that justice has not been done, or to raise a
    substantial issue necessitating an evidentiary hearing.
    12In closing, defense counsel suggested that the shooter
    may have come from the silver sedan, raising the possibility
    that the shooting was the product of a drug deal gone bad.
    27
    Evidence that a third-party culprit committed the crime is
    admissible "if the judge determine[s] that it ha[s] 'a rational
    tendency to prove the issue the defense raises' and [it is] not
    'too remote or speculative.'"    Commonwealth v. Alcide, 
    472 Mass. 150
    , 161 (2015), quoting Commonwealth v. Silva-Santiago, 
    453 Mass. 782
    , 801 (2009).    See Commonwealth v. Holliday, 
    450 Mass. 794
    , 807-811, cert. denied sub nom. Mooltrey v. Massachusetts,
    
    555 U.S. 947
    (2008); Commonwealth v. Murphy, 
    442 Mass. 485
    , 507
    (2004); Mass. G. Evid. § 1105 (2019).    To that end, a defendant
    must demonstrate that the acts of another person are "so closely
    connected in point of time and method of operation as to cast
    doubt upon the identification of [the] defendant as the person
    who committed the crime" (citation omitted).    Commonwealth v.
    Buckman, 
    461 Mass. 24
    , 31 (2011), cert. denied, 
    567 U.S. 920
    (2012).   See Commonwealth v. Conkey, 
    443 Mass. 60
    , 66 (2004),
    S.C., 
    452 Mass. 1022
    (2008).
    Here, we agree with the Commonwealth that the proffered
    evidence fails to meet the standard for admissibility of third-
    party culprit evidence.    Rather, the investigation performed at
    the behest of postconviction counsel failed to turn up any
    specific individual with more than a generalized motive to harm
    Garcia, and it did not connect any other specific individual to
    the scene of the crime.    See 
    Buckman, 461 Mass. at 31
    (proffered
    evidence of tension with neighbor was inadmissible where "the
    28
    defendant offered and produced no evidence suggesting that the
    neighbor had any opportunity to kill beyond that possessed by
    any neighbor"); 
    id. (proffered evidence
    that serial killer was
    "on the loose" in area was inadmissible where defendant "could
    not place the serial killer in the vicinity at the time of this
    murder").
    For similar reasons, even if the evidence were admissible,
    we would conclude that it was not likely to have affected the
    jury's decision to convict.   Here, Garcia had no memory of the
    shooting itself, and the evidence supported an inference that
    there was at least one other person (in addition to the
    defendant and the two victims) at the scene of the crime,
    namely, the driver of the silver sedan.    As 
    noted supra
    , based
    on this evidence, trial counsel was able to argue in closing
    that the defendant's supplier or "the supplier's muscle" could
    have been in the silver sedan and could have shot Garcia "to
    punish somebody for violating the cardinal rule of drug dealing.
    Do not steal from the supplier."   The addition to this of
    further, cumulative evidence of unidentified third parties with
    a generalized motive to harm the defendant would have been
    unlikely to sway the jury.    See Breese v. Commonwealth, 
    415 Mass. 249
    , 252-253 (1993) (counsel's alleged failure to
    investigate another suspect was not ineffective where defendant
    failed to show that "better work might have accomplished
    29
    something material for the defense" [citation omitted]).   Under
    these circumstances, the failure of trial counsel to further
    develop a third-party culprit defense did not create a
    substantial likelihood of a miscarriage of justice.
    3.   Admission of evidence of the defendant's prior attempts
    to purchase a firearm.   Finally, the defendant contends that the
    trial judge committed reversible error by admitting evidence of
    the defendant's prior attempts to obtain firearms other than the
    murder weapon.   The defendant preserved this issue by opposing
    the Commonwealth's motion in limine to introduce the evidence
    and by objecting when the testimony was introduced at trial.      We
    therefore review the issue for prejudicial error.
    Evidence of prior bad acts is generally inadmissible to
    show a defendant's propensity to commit a crime.    See
    Commonwealth v. Vasquez, 
    478 Mass. 443
    , 448 (2017); Mass. G.
    Evid. § 404(b)(1).   However, such evidence may be admitted if
    relevant for some other purpose, provided that its probative
    value outweighs the risk of unfair prejudice to the defendant.
    See Vasquez, supra; Commonwealth v. Bonnett, 
    472 Mass. 827
    , 840-
    841 (2015); Commonwealth v. McGee, 
    467 Mass. 141
    , 157 (2014);
    Commonwealth v. Ridge, 
    455 Mass. 307
    , 322–323 (2009); Mass. G.
    Evid. § 404(b)(2).
    Where the proffered evidence concerns a weapon that
    "definitively could not have been used in the commission of the
    30
    crime, we have generally cautioned against admission of evidence
    related to it," Commonwealth v. Barbosa, 
    463 Mass. 116
    , 122
    (2012), recognizing that the "tenuous relevancy" of such
    evidence rarely outweighs the risk of unfair prejudice to the
    defendant, Commonwealth v. Toro, 
    395 Mass. 354
    , 358 (1985).     See
    
    McGee, 467 Mass. at 157
    ; 
    Barbosa, supra
    .     In cases where we have
    approved of the admission of such evidence, we have often
    required a limiting instruction "to ensure that its probative
    value outweighs the danger of unfair prejudice."    McGee, supra
    at 158, citing 
    Ridge, 455 Mass. at 323
    , and 
    Holliday, 450 Mass. at 816
    .
    Here, the judge allowed the Commonwealth's motion in limine
    to admit the evidence for the limited purposes of putting the
    defendant's actions into context -- e.g., by demonstrating the
    defendant's motive for waiting until the trip to Boston to carry
    out the shootings, as he had not previously acquired a firearm
    and sought one -- and showing the defendant's familiarity with
    firearms.   These were permissible purposes for admitting the
    evidence, provided that the probative value of the evidence
    outweighed the danger of unfair prejudice.    See 
    Ridge, 455 Mass. at 322
    (demonstrating "access to" and "familiarity with"
    firearms is permissible purpose); Mass. G. Evid. § 404(b)(2)
    (demonstrating "motive" or "intent" is permissible purpose).
    31
    When ruling on the motion in limine, the judge stated that
    she would give a limiting instruction when the evidence was
    admitted, but when the time came, she apparently did not do so.13
    However, she did give a limiting instruction in her final
    charge.14   Although the better practice would have been to give a
    13The judge had given a general instruction on propensity
    evidence during the testimony of a prior witness, without
    specifically mentioning firearm evidence, in which she stated:
    "Jurors, before I release you for the morning recess, I do
    want to give you an instruction. You heard a number of
    references through this witness in regard to drug activity
    as it pertains to the witness as well as to the defendant.
    "That evidence is admitted for certain limited purposes in
    this case, including to put into context the allegations
    that are presently before the Court. They are not -- it is
    not being admitted to show any criminal propensity or bad
    character of the defendant or that he would be more likely
    to have committed the crimes that are before the Court."
    The judge's remarks during the final charge conference
    indicate that she thought that her prior instruction
    specifically mentioned firearm evidence ("I will give at the
    defendant's request a further instruction in regard to the
    limited use of certain evidence that was presented, specifically
    . . . seeking a firearm . . ."), something she also expressed in
    her final charge to the jury, see note 14, infra.
    14   The judge instructed the jury as follows:
    "A further evidentiary matter, I want to remind you of as
    well is this. That the defendant is not charged with
    committing any crimes other than those contained in the
    four indictments before the Court. You have heard mention
    of other acts allegedly done by the defendant, specifically
    I gave you limiting instructions at the time in regard to
    evidence as it pertained to dealing in narcotics or dealing
    drugs, if you will, or seeking -- you heard evidence that
    he was seeking to obtain a firearm, and you also heard
    32
    more specific contemporaneous limiting instruction in addition
    to a specific limiting instruction in the final charge, in this
    case, we conclude that the general instruction on propensity
    evidence given prior to the admission of the evidence, in
    conjunction with the specific limiting instruction in the final
    charge, provided sufficient guidance to the jury about the
    limited purposes for which the evidence was admitted.   Contrast
    
    McGee, 467 Mass. at 157
    -158 (danger of unfair prejudice from
    photograph of defendant holding silver gun that could not have
    been murder weapon outweighed probative value where judge's
    final charge "did not instruct the jury adequately as to the
    proper use of the evidence").
    Moreover, even if we were to conclude that the evidence was
    improperly admitted, we would conclude that the error was
    evidence in regard to alleged threats. Again, these are
    allegations, but they were admitted for limited purposes,
    and those limited purposes relate to the government's
    theories in the case, particularly with regard to motive,
    circumstances surrounding the interaction between certain
    individuals and to put certain conduct into context.
    "You may not consider any of those acts referred to now
    generally, but I believe I instructed you more
    specifically, as proof that defendant had criminal
    propensity or bad character, or that he committed the
    crimes before this Court. So for example, even if you were
    to determine that the defendant dealt in drugs, that does
    not mean he is guilty of the indictments before the Court.
    They are part of the evidence. You can give them what
    weight you feel they are fairly entitled to receive but
    only in accordance with my instruction and for the limited
    purpose for which they are offered."
    33
    harmless due to the "scant attention" given to the evidence at
    trial, 
    McGee, 467 Mass. at 158
    , citing 
    Barbosa, 463 Mass. at 124
    , and the strength of the other evidence against the
    defendant, 
    discussed supra
    .
    4.   Review pursuant to G. L. c. 278, § 33E.    Finally, after
    a thorough review of the record, we discern no reason to
    exercise our authority under G. L. c. 278, § 33E, to grant a new
    trial or to reduce or set aside the jury's verdict of murder in
    the first degree.
    Conclusion.     For the foregoing reasons, we affirm the
    defendant's convictions and the denial of the defendant's
    postconviction motions.
    So ordered.