Commonwealth v. Lawson ( 2016 )


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    SJC-11996
    COMMONWEALTH   vs.   RICHARD LAWSON.
    Suffolk.    March 7, 2016. - October 28, 2016.
    Present:     Gants, C.J., Spina, Cordy, Botsford, Duffly, Lenk,
    & Hines, JJ.1
    Insanity. Mental Health. Evidence, Sanity, Inference,
    Presumptions and burden of proof, Argument by prosecutor.
    Practice, Criminal, Presumptions and burden of proof,
    Required finding, Argument by prosecutor.
    Complaint received and sworn to in the Central Division of
    the Boston Municipal Court Department on March 12, 2014.
    The case was heard by Michael J. Coyne, J.
    The Supreme Judicial Court granted an application for
    direct appellate review.
    Christopher DeMayo for the defendant.
    John P. Zanini, Assistant District Attorney, for the
    Commonwealth.
    1
    Justices Spina, Cordy, and Duffly participated in the
    deliberation on this case prior to their retirements.
    2
    GANTS, C.J.    The defendant, after being told by Boston
    police officers that he had an outstanding warrant, resisted
    arrest and assaulted the officers.   At a jury-waived trial in
    the Boston Municipal Court, the defendant offered a defense of
    lack of criminal responsibility, and called a forensic
    psychologist who described the defendant's lengthy mental health
    history and opined that the defendant was not criminally
    responsible at the time of the offense.   The Commonwealth did
    not present expert evidence on the issue of criminal
    responsibility in rebuttal but rather relied on the
    circumstances surrounding the offense and cross-examination of
    the defendant's expert to establish criminal responsibility.
    The judge denied the defendant's motion for required findings of
    not guilty by reason of lack of criminal responsibility and
    found the defendant guilty on all charges.
    On appeal, the defendant contends that the judge must have
    relied on the so-called "presumption of sanity" because, without
    this presumption, the evidence did not support a finding of
    criminal responsibility beyond a reasonable doubt.     We conclude
    that the "presumption of sanity" is not truly a presumption but
    rather an inference that the defendant is probably criminally
    responsible because most people are criminally responsible for
    their acts.   Where a defendant proffers a defense of lack of
    criminal responsibility and there is some evidence that supports
    3
    it, this inference, standing alone, cannot support a finding
    that a defendant is criminally responsible beyond a reasonable
    doubt.   Although the Commonwealth may not rely on "the
    presumption of sanity" to establish criminal responsibility, the
    Commonwealth need not offer expert testimony in every case and
    may rely instead on the circumstances of the offense and all
    that the defendant did and said before, during, and after the
    offense to prove the defendant's criminal responsibility.
    Applying the proper test, we hold that the evidence here was
    sufficient to allow a reasonable finder of fact to conclude that
    the defendant was criminally responsible at the time of the
    offenses and, therefore, affirm the convictions.
    Background.    We recite the facts that could have been found
    by the judge from the evidence at trial.    On March 11, 2014,
    Boston police Officers Paul Hayward and John Mullen were on
    routine patrol in full uniform in downtown Boston when Officer
    Hayward spotted the defendant, whom the officer knew to have
    outstanding warrants.    The officers got out of their vehicle and
    approached the defendant, who was walking, talking, and laughing
    with two other men.     As the officers approached, the defendant's
    eyes widened, and he looked over his shoulder.     When Officer
    Hayward blocked the defendant's path and told the defendant that
    the officer needed to speak with him, the defendant asked the
    officer to light his cigarette.    The officer declined, told the
    4
    defendant that he had an outstanding warrant, and asked for
    identification.   The defendant stepped back and reached his hand
    down towards his pants pocket.    Officer Hayward put his hand on
    the defendant's hand to prevent the defendant from reaching into
    the pocket.   The defendant pushed Officer Hayward away.     Officer
    Hayward then "took [the defendant] to the ground," and a
    struggle ensued during which both officers attempted to restrain
    the defendant and apply handcuffs.   During the struggle, Officer
    Mullen inadvertently placed both cuffs on the same hand of the
    defendant.    The defendant kicked Officer Mullen in the head
    several times and flailed his handcuffed hand.    Eventually, they
    were able to restrain the defendant.    Officer Hayward described
    the defendant as being coherent but "absolutely manic" during
    the struggle.
    The defendant was arrested and taken to the police station,
    where he struggled with several other officers.    Later that day,
    the defendant was taken to the Massachusetts General Hospital
    for a mental status evaluation.    At the hospital, he was
    described as paranoid, disheveled, and having "flight of ideas."
    He was so agitated that he was given emergency antipsychotic
    medication.
    After his arrest, the defendant appeared in the Quincy
    Division of the District Court Department on an unrelated
    matter.   A judge of that court ordered the defendant to be
    5
    evaluated for his competency to stand trial, and the defendant
    was sent to Bridgewater State Hospital (Bridgewater) for that
    evaluation.
    At trial, in support of his defense of lack of criminal
    responsibility, the defendant called a forensic psychologist at
    Bridgewater to testify regarding the defendant's mental health
    history and her opinion as to his criminal responsibility on the
    day in question.   The doctor reported that the defendant has an
    "extensive" mental health history, which has involved ten
    admissions to Bridgewater, the first in 2000.    Some of those
    admissions were the result of civil commitments; others resulted
    from referrals from correctional institutions.    He was civilly
    committed at Bridgewater at the time of trial.    The defendant
    has received mental health diagnoses of a psychotic disorder not
    otherwise specified, bipolar disorder, manic episodes with
    psychotic features, a mood disorder not otherwise specified, and
    schizoaffective disorder.   His current diagnosis is
    schizoaffective disorder, bipolar type.    In the past, he has
    been prescribed a combination of antipsychotic and mood-
    stabilizing medications.    The defendant also has a history of
    substance abuse.
    A month before the incident, the defendant had been in
    custody at the Nashua Street jail, where he was taking
    medications prescribed to manage his mental health symptoms.
    6
    But on February 21, 2014, the defendant was transferred to the
    Norfolk County Correctional Center, where his antipsychotic and
    mood-stabilizing medications were discontinued.   The mood-
    stabilizing medication was later prescribed, but the defendant
    did not take it.   The defendant was then transferred to the
    Middlesex County house of correction, where he was not
    prescribed any medication, and from there he apparently was
    released from custody.   Consequently, there was no record
    indicating that the defendant had taken any medication from
    February 21 until the incident on March 11.
    The doctor testified that when the defendant discontinues
    medications, he decompensates quickly, and he would likely
    become agitated, aggressive, impulsive, paranoid, and
    delusional.   He also would likely hear voices, exhibit poor
    insight, and exercise poor judgment.
    The doctor also described what the defendant had told her
    about the incident.   He said that he was walking down the street
    when someone wearing a yellow suit with a reflective emblem
    approached him and asked, "What the fuck is your name?"2     He
    thought the person could have been a street cleaner or a
    security guard but did not think that the person was a police
    2
    The defendant recalled only one person approaching him; he
    did not recall a second person being involved in the
    altercation.
    7
    officer.   He thought that the person was trying to torment him
    and was going to take him back to jail.3
    The doctor opined that the defendant was likely manifesting
    symptoms of schizoaffective disorder on the day of the incident,
    including paranoid delusions.   She also opined that his actions
    were driven by a distorted sense of reality caused by the
    symptoms of his mental illness and that he could not conform his
    conduct to the requirements of the law on the day of the
    offense.
    On cross-examination, the doctor stated that her
    conversations with the defendant occurred after she provided him
    with a Lamb warning, see Commonwealth v. Lamb, 
    365 Mass. 265
    ,
    270 (1974), informing him that his statements would not be
    confidential and could be used in court.4   She testified that she
    3
    The defendant's statements to the forensic psychologist
    were hearsay and therefore admissible only for the limited
    purpose of assessing the credibility of the doctor's opinion
    regarding the defendant's criminal responsibility; they were not
    admissible for the truth of the matters asserted. See
    Commonwealth v. Brown, 
    449 Mass. 747
    , 768-769 (2007). See
    generally Mass. G. Evid. § 801(d)(2) (2016) (party's out-of-
    court statement is hearsay unless offered in evidence by
    opposing party). However, neither party sought to limit the
    admissibility of these statements, and the judge did not declare
    that he would do so. Where otherwise inadmissible hearsay is
    admitted without objection or request for a limiting
    instruction, it may be considered by the finder of fact for all
    purposes. See Commonwealth v. Washington, 
    449 Mass. 476
    , 487
    (2007).
    4
    In Commonwealth v. Lamb, 
    365 Mass. 265
    , 270 (1974), we
    held that communications between an individual and a mental
    8
    first encountered the defendant three weeks after his arrest;
    she did not examine the defendant on the day of the offense.
    The doctor reviewed the defendant's records from the
    Massachusetts General Hospital regarding his examination there
    on March 11 and 12, but did not review any subsequent medical
    records before March 31, when the defendant was sent to
    Bridgewater.   She acknowledged the defendant's history of
    substance abuse and testified that he admitted to using cocaine
    on the day of the incident.   The doctor concluded that the
    defendant was not malingering, but she initially did not rule
    out that possibility.    She also testified that the defendant has
    been noncompliant with taking his medication in the past and has
    been violent while hospitalized at Bridgewater even when he was
    taking his medication.
    The prosecution did not offer any expert testimony in
    rebuttal.   At the close of all the evidence, the defendant moved
    for required findings of not guilty by reason of lack of
    criminal responsibility, arguing that the evidence was
    insufficient as a matter of law to prove beyond a reasonable
    doubt that the defendant was criminally responsible at the time
    health professional made during a court-ordered examination are
    privileged pursuant to G. L. c. 233, § 20B, unless the
    individual is informed that the communications would not be
    privileged.
    9
    of the offenses.5    The judge denied the motion and found the
    defendant guilty on all counts:   two counts of assault and
    battery on a public employee, in violation of G. L. c. 265,
    § 13D; one count of assault and battery by means of a dangerous
    weapon (shod foot), in violation of G. L. c. 265, § 15A; one
    count of assault by means of a dangerous weapon (handcuffs), in
    violation of G. L. c. 265, § 15B;6 and one count of resisting
    arrest, in violation of G. L. c. 268, § 32B.    The defendant
    appealed, and we allowed his motion for direct appellate review.
    Discussion.    The defendant argues that the judge erred in
    denying his motion for required findings of not guilty by reason
    of lack of criminal responsibility.    He also contends that the
    prosecutor made improper comments to the judge in arguing
    against that motion.
    1.   Criminal responsibility.   Where a defendant asserts a
    defense of lack of criminal responsibility and there is evidence
    at trial that, viewed in the light most favorable to the
    5
    Although counsel moved for required findings of not
    guilty, and did not specify that she was moving for required
    findings of not guilty by reason of lack of criminal
    responsibility, it is clear from the evidence at trial and the
    content of her argument that her motion sought the latter
    finding.
    6
    The complaint charged the defendant with assault and
    battery with the handcuffs, but after the prosecution rested,
    the judge ordered the complaint amended to allege the lesser
    included offense of assault with the handcuffs because the
    evidence showed that the defendant "flailed" the handcuffs but
    never struck anyone with them.
    10
    defendant, would permit a reasonable finder of fact to have a
    reasonable doubt whether the defendant was criminally
    responsible at the time of the offense, the Commonwealth bears
    the burden of proving beyond a reasonable doubt that the
    defendant was criminally responsible.   Commonwealth v. Keita,
    
    429 Mass. 843
    , 849-850 (1999).   "In this process, we require the
    Commonwealth to prove negatives beyond a reasonable doubt:     that
    the defendant did not have a mental disease or defect at the
    time of the crime and, if that is not disproved beyond a
    reasonable doubt, that no mental disease or defect caused the
    defendant to lack substantial capacity either to appreciate the
    criminality of his conduct or to conform his conduct to the
    requirements of law."    
    Id., citing Commonwealth
    v. McHoul, 
    352 Mass. 544
    , 546-547 (1967).
    The defendant contends that, where the Commonwealth offered
    no expert evidence that the defendant was criminally responsible
    and where there was nothing about the circumstances of the
    commission of the crimes or the defendant's conduct after their
    commission that would suggest that he was criminally
    responsible, it must be inferred that the judge denied the
    motion for required findings of not guilty based solely on the
    "presumption of sanity," even though the judge made no reference
    to such a presumption.   The defendant further claims that the
    inference arising from this "presumption" alone cannot support a
    11
    finding beyond a reasonable doubt that the defendant was
    criminally responsible.
    The Commonwealth contends that a judge may not allow a
    motion for a required finding of not guilty based on the
    Commonwealth's failure to prove criminal responsibility because
    criminal responsibility is not an "element" of any of the
    offenses charged.   We agree that criminal responsibility is not
    an "element" of any crime.    Commonwealth v. Kostka, 
    370 Mass. 516
    , 532 (1976).    If it were, the United States Supreme Court
    would not have upheld the constitutionality of Federal and State
    laws that place the burden on a defendant to prove that he or
    she was not criminally responsible at the time of the offense,
    because the Supreme Court has declared that due process requires
    that the prosecution bear the burden of proving every element of
    a crime.   
    Id. at 531-532.
      See In re Winship, 
    397 U.S. 358
    , 364
    (1970).    See also Leland v. Oregon, 
    343 U.S. 790
    , 798-799 (1952)
    (due process does not mandate that prosecution bear burden of
    proof of criminal responsibility).    However, even though
    criminal responsibility is not an "element" of a crime, once the
    defense of lack of criminal responsibility is proffered and some
    evidence is offered in support, a jury must be instructed that
    they must find the defendant not guilty by reason of lack of
    criminal responsibility if the Commonwealth has failed to meet
    its burden of proving criminal responsibility.    See Commonwealth
    12
    v. Goudreau, 
    422 Mass. 731
    , 735-737 (1996); 
    id. at 737-739
    (Appendix).   See also Model Jury Instructions on Homicide 1-2
    (2013).   Regardless of whether criminal responsibility is an
    "element" of a crime or a required "fact" to be proved, a
    conviction may not stand where no rational finder of fact could
    find the defendant criminally responsible.   See 
    Keita, 429 Mass. at 844
    ("if the evidence did not permit a finding of criminal
    responsibility, [the defendant's] conviction would create a
    substantial risk of a miscarriage of justice").   Therefore, a
    required finding of not guilty by reason of lack of criminal
    responsibility may rest on the failure of proof of criminal
    responsibility.   The absence of self-defense also is not an
    element of any offense, but where self-defense is claimed, we
    have considered whether the evidence of its absence is
    sufficient to support the denial of a motion for a required
    finding of not guilty.   See Commonwealth v. McAfee, 
    430 Mass. 483
    , 495-496 (1999); Koonce v. Commonwealth, 
    412 Mass. 71
    , 73-74
    (1992), S.C., 
    418 Mass. 367
    (1994).
    The Commonwealth also contends that, if criminal
    responsibility is a suitable ground for a defendant to move for
    a required finding of not guilty by reason of lack of criminal
    responsibility, the inference arising from the "presumption of
    sanity" alone is sufficient to defeat such a motion.     We agree
    that, under current case law, the Commonwealth is correct.      In
    13
    Commonwealth v. Smith, 
    357 Mass. 168
    , 178-180 (1970), S.C., 
    427 Mass. 245
    (1998), we declared:
    "[A] court cannot direct a jury to return a verdict of not
    guilty by reason of insanity even though the only evidence
    on the issue is that the defendant was insane at the time
    of the alleged crime, and the evidence is uncontroverted.
    [One] reason, as stated in Commonwealth v. Clark, 
    292 Mass. 409
    , 415 [1935], is that 'although the burden of proof is
    on the Commonwealth to prove the defendant mentally
    responsible for crime . . . the fact that a great majority
    of men are sane, and the probability that any particular
    man is sane, may be deemed by a jury to outweigh, in
    evidential value, testimony that he is insane.' . . . It
    is for the jury to decide in each case whether they draw
    that inference. . . . If they draw that inference, it is
    for them to decide what weight they will give to it in the
    light of all of the evidence introduced on the issue. They
    may deem it to outweigh, in evidential value, psychiatric
    or other evidence that the defendant is insane. These are
    decisions to be made by the jury, and the court cannot
    direct the jury how they shall decide thereon."
    See 
    Keita, 429 Mass. at 847
    .     We now revisit the doctrine
    arising from that case law.
    A presumption in the classic sense is a rule of law where
    proof of fact A is sufficient to satisfy a party's burden to
    prove fact B, leaving the opposing party with the burden of
    production or persuasion to prove the nonexistence of fact B.
    2 McCormick on Evidence § 342, at 675-677 (K.S. Broun ed., 7th
    ed. 2013).   In criminal cases, presumptions have been considered
    to be either mandatory or permissive:     mandatory presumptions
    require the finder of fact to "find the presumed fact upon proof
    of the basic fact, 'at least unless the defendant has come
    forward with some evidence to rebut the presumed connection
    14
    between the two facts,'" whereas permissive presumptions
    "allow[], but do[] not require, the trier of fact to infer the
    presumed fact from proof of the basic facts."       
    Id. at §
    346, at
    716, quoting County Court of Ulster County, N.Y. v. Allen, 
    442 U.S. 140
    , 157 (1979).       We have recognized that what has been
    called the "presumption of sanity" is "merely an expression we
    have used to describe both 'the fact that a great majority of
    men are sane,' . . . and 'the probability that any particular
    man is sane,' . . . , from which the jury may conclude that the
    defendant is sane" (citations omitted).       
    Kostka, 370 Mass. at 530
    .       The "presumption of sanity" is thus not a presumption
    under any meaning of the word.       It is not premised on the
    admission in evidence of any basic fact to prove a presumed
    fact, but rather relies on a commonsense understanding regarding
    the sanity of the majority of the populace that need not be
    admitted in evidence.       It is more accurately characterized as an
    inference; characterizing it as a presumption is a recipe for
    confusion.7
    7
    We have declared that the "presumption of sanity" has a
    procedural characteristic in that it relieves the Commonwealth
    of the burden of proving criminal responsibility unless and
    until the defendant proffers the lack of criminal responsibility
    as a defense and some evidence is admitted in support of that
    defense. Commonwealth v. Kostka, 
    370 Mass. 516
    , 530 (1976).
    But this suggests that criminal responsibility is an element of
    an offense, which it is not, and that the presumption satisfies
    the prosecution's burden of proving that element where no
    evidence to the contrary is admitted. Lack of criminal
    15
    The inference that a defendant is probably sane because
    most people are sane is not strong enough alone to permit a
    rational finder of fact to conclude that a defendant is
    criminally responsible beyond a reasonable doubt.   Although it
    is probable that an individual selected randomly would be
    criminally responsible for his or her acts, that same
    probability would not attach to the tiny subset of the
    population who are criminal defendants with a long history of
    mental illness who proffer a defense of lack of criminal
    responsibility.   As Justice O'Connor wrote in a dissent in
    Commonwealth v. Kappler, 
    416 Mass. 574
    , 599-600 (1993)
    (O'Connor, J., dissenting):
    "The fact that a great majority of people are sane says
    little, if anything, about whether a particular defendant
    was sane when he or she engaged in a type of conduct in
    which the great majority of people do not engage. The fact
    that a great majority of people are sane says absolutely
    nothing about whether the defendant in this case, . . . who
    had a long history of 'mental illness and auditory
    hallucinations,' . . . was sane on the morning that,
    staring straight ahead, he drove his automobile through a
    red traffic light on the Alewife Brook Parkway and then
    onto an adjacent footpath where he intentionally struck two
    people he had no reasonable or understandable motive to
    harm, and drove away" (citation omitted).
    responsibility is a defense, like self-defense or defense of
    another, and, where the defense is not raised, the Commonwealth
    has no burden to rebut it. See 
    id. at 532.
    In this procedural
    sense, a "presumption of sanity" is as nonsensical as a
    presumption that a person does not kill in self-defense or in
    defense of another.
    16
    See Commonwealth v. Ricard, 
    355 Mass. 509
    , 515 (1969) ("The
    probability that any particular man is sane may be of slight if
    any weight in the face of unanimous psychiatric opinion to the
    contrary, where it is plainly apparent from the evidence that
    the act committed is not one that a sane person would have
    committed, there being no circumstances [anger, revenge,
    rejection, jealousy, hatred, insult, intoxication, or the like]
    to account for the murderous act by a sane person").
    To permit an inference based on the probability that a
    person in the general population is criminally responsible,
    standing alone, to support a finding beyond a reasonable doubt
    of criminal responsibility also diminishes the standard of proof
    beyond a reasonable doubt, especially where there is strong
    evidence of the defendant's mental health history and bizarre
    behavior.   See Commonwealth v. McLaughlin, 
    431 Mass. 506
    , 523
    (2000) (Spina, J., concurring) (noting "the obvious analytic
    problem of reconciling the reasonable doubt standard with a
    'presumption' that permits jurors to 'infer' a particular
    defendant's sanity from general probabilities"); Commonwealth v.
    Mutina, 
    366 Mass. 810
    , 815 n.2 (1975) ("it may be questionable
    whether the 'beyond a reasonable doubt' standard and the
    'presumption of sanity' can logically coexist in a case where
    there has been extensive evidence of insanity with no medical
    evidence to the contrary").
    17
    We therefore conclude that the inference that the defendant
    is criminally responsible because the great majority of persons
    are criminally responsible is not sufficient alone to warrant a
    rational finder of fact to conclude beyond a reasonable doubt
    that a defendant is criminally responsible.8   But this does not
    mean that the Commonwealth must offer expert evidence to meet
    its burden of proving criminal responsibility in every case
    where the issue is raised.   See 
    Keita, 429 Mass. at 846
    ("The
    Commonwealth . . . may prove sanity without presenting expert
    testimony").   See also 
    Kostka, 370 Mass. at 535-536
    .   The
    Commonwealth may prove criminal responsibility through the
    inferences arising from the circumstances of the offense,
    including evidence that the defendant planned the offense, acted
    8
    We also recognize that we earlier declared that "[a] jury
    instruction concerning the presumption of sanity should be given
    in every case in which the question of the defendant's criminal
    responsibility is raised." Commonwealth v. Keita, 
    429 Mass. 843
    , 846 (1999). The District Court followed this guidance by
    including in its model jury instruction 9.200 the sentence, "In
    considering whether or not the defendant was sane, if you feel
    it appropriate you may take into account that the great majority
    of people are sane, and that there is a resulting likelihood
    that any particular person is sane." See Criminal Model Jury
    Instructions for Use in the District Court (1999). An earlier
    version of the Model Jury Instructions on Homicide contained a
    substantially identical instruction. See Model Jury
    Instructions on Homicide 51 (1999). We now conclude that, given
    the meager weight of this inference and the risk of juror
    confusion regarding the burden of proof, judges should not
    instruct juries regarding this inference. We note that the
    current Model Jury Instructions on Homicide make no reference to
    this inference in the instructions regarding criminal
    responsibility. See Model Jury Instructions on Homicide 1-12
    (2013).
    18
    on a rational motive, made rational decisions in committing the
    offense and in avoiding capture, and attempted to conceal the
    offense or his or her role in the offense.    See Commonwealth v.
    Cullen, 
    395 Mass. 225
    , 229 (1985) ("the judge was entitled to
    infer sanity from the facts underlying the crime"); 
    Ricard, 355 Mass. at 515
    (absence of motive for killing supports claim of
    lack of criminal responsibility).   The Commonwealth also may
    prove criminal responsibility through admissible evidence of the
    defendant's words and conduct before, during, and after the
    offense, including evidence of malingering.   See Cullen, supra
    at 229-230; Commonwealth v. Lunde, 
    390 Mass. 42
    , 47-49 (1983).
    In deciding a motion for a required finding of not guilty
    by reason of lack of criminal responsibility, the judge must
    examine the evidence in the light most favorable to the
    Commonwealth and determine whether "the evidence and the
    inferences that reasonably could be drawn from it were 'of
    sufficient force'" to permit a rational finder of fact to
    conclude that the defendant was criminally responsible beyond a
    reasonable doubt.   See Commonwealth v. Scott, 
    472 Mass. 815
    , 820
    (2015), quoting Commonwealth v. Latimore, 
    378 Mass. 671
    , 676–677
    (1979).   A motion for a required finding of not guilty may be
    brought at the close of the Commonwealth's case and again at the
    close of all the evidence, see Commonwealth v. Sheline, 
    391 Mass. 279
    , 283 (1984), but we conclude that a motion for a
    19
    required finding of not guilty by reason of lack of criminal
    responsibility may be brought only at the close of all the
    evidence.   The reason for the difference is that the
    Commonwealth need prove criminal responsibility beyond a
    reasonable doubt only after there is evidence presented of lack
    of criminal responsibility that is sufficient to warrant a
    reasonable doubt, see Commonwealth v. Berry, 
    457 Mass. 602
    , 612
    & n.5 (2010), S.C., 
    466 Mass. 763
    (2014), quoting Commonwealth
    v. Mills, 
    400 Mass. 626
    , 627 (1987), and such evidence is often
    presented only during the defendant's case.   By limiting such
    motions for a required finding of not guilty by reason of lack
    of criminal responsibility to the close of all the evidence, we
    ensure that the Commonwealth has a full opportunity to offer
    evidence in rebuttal of any such defense claim.
    In deciding such a motion at the close of all the evidence,
    a judge must view the evidence in the light most favorable to
    the Commonwealth and must disregard contrary evidence presented
    by the defendant, including the testimony of a defense expert,
    unless the contrary evidence demonstrates that the
    Commonwealth's evidence, or any inference drawn from such
    evidence, is "conclusively incorrect."   See Commonwealth v.
    O'Laughlin, 
    446 Mass. 188
    , 204 (2006), quoting Commonwealth v.
    Pike, 
    430 Mass. 317
    , 323 (1999).   See also 
    O'Laughlin, supra
    ("the fact that the defendant has presented evidence that he did
    20
    not [commit the crime] does not affect the sufficiency of the
    evidence unless the contrary evidence is so overwhelming that no
    rational jury could conclude that the defendant was guilty");
    Kater v. Commonwealth, 
    421 Mass. 17
    , 20, S.C., 
    421 Mass. 1008
    (1995), and 
    432 Mass. 404
    (2000).
    It will be the rare case where the totality of the evidence
    regarding the defendant's conduct and the circumstances
    surrounding the offense will not be sufficient to defeat a
    defendant's motion for a required finding of not guilty by
    reason of lack of criminal responsibility.    Where, however, this
    evidence provides only weak support for a finding of criminal
    responsibility, the Commonwealth proceeds at its peril if it
    chooses to offer no expert testimony to rebut a defense expert's
    opinion of lack of criminal responsibility.   Cf. 
    Kostka, 370 Mass. at 540
    (Hennessey, C.J., dissenting in part) ("the
    Commonwealth runs the very real risk of reversal and the
    granting of a new trial if it chooses to rely on the presumption
    and the circumstantial evidence of sanity . . . , rather than to
    introduce medical evidence of sanity").
    Applying the legal standard to the facts of this case, we
    conclude that this is not one of those rare cases, and that the
    evidence was sufficient as a matter of law to support a finding
    that the defendant was criminally responsible beyond a
    reasonable doubt.   Viewed in the light most favorable to the
    21
    Commonwealth, the evidence would allow a reasonable fact finder
    to infer that the defendant (1) told the doctor that he
    struggled with the officer because he feared he would be taken
    back to jail and therefore understood that the man was a police
    officer, with the power to arrest him; (2) attempted to divert
    the officers' attention by asking one of the officers to light
    his cigarette, because he feared that the officers were going to
    arrest him on an outstanding warrant and became violent once he
    realized that his ruse had failed; (3) fought the officers
    because he wanted to escape rather than be arrested and return
    to jail; and (4) was fabricating his claims that the person he
    assaulted was wearing a yellow suit with a reflective emblem and
    that he did not believe the person to be a police officer.
    Although the testimony and opinion of the doctor
    "contradicted, and tended to undermine, the potency of the
    Commonwealth's case, it falls well short of demonstrating that
    the Commonwealth's evidence was 'conclusively incorrect.'"
    
    Pike, 430 Mass. at 323
    , quoting 
    Kater, 421 Mass. at 20
    .    See
    
    Kater, supra
    ("Deterioration would occur not because the
    defendant contradicted the Commonwealth's evidence . . . , but
    because evidence for the Commonwealth necessary to warrant
    submission of the case to the jury is later shown to be
    incredible or conclusively incorrect" [citation omitted]).
    22
    2.    Argument by prosecutor.   The defendant also argues that
    the prosecutor made improper assertions to the judge in arguing
    against the defendant's motion for required findings of not
    guilty.   Specifically, the defendant claims that the
    prosecutor's argument that the defendant had the capacity to
    understand his actions at the time of the offenses and that he
    deliberately chose not to take medications were not supported by
    the evidence adduced at trial.   As to the argument that the
    defendant had the substantial capacity to understand the legal
    and moral significance of his actions on the day of the
    offenses, our conclusion that the evidence was sufficient to
    support a finding of criminal responsibility also means that the
    prosecutor's argument was a "fair inference[] that might be
    drawn from the evidence."   See Commonwealth v. Ridge, 
    455 Mass. 307
    , 330 (2009), quoting Commonwealth v. Murchison, 
    418 Mass. 58
    , 59–60 (1994).
    As to the argument that the defendant was deliberately
    refusing to take medication, the defendant cannot establish that
    he was prejudiced by any misstatement because, shortly after the
    prosecutor made that statement, defense counsel brought to the
    judge's attention the fact that the defendant was not prescribed
    medication at the Middlesex County house of correction before
    the incident.   Thus, it is unlikely that any misstatement
    23
    affected the trial judge's findings.   See Commonwealth v.
    Beaudry, 
    445 Mass. 577
    , 584-585 (2005).
    Conclusion.   The order denying the defendant's motion for
    required findings of not guilty by reason of lack of criminal
    responsibility is affirmed, and the defendant's convictions are
    affirmed.
    So ordered.