Convicted of the murder in the first degree of his pregnant wife, the defendant, Jerry A. Dunton, appeals. On appeal, the defendant asserts error in the denial of his request that the judge instruct the jurors on involuntary manslaughter. Pursuant to G. L. c. 278, § 33E (1984 ed.), he also asks that we direct the entry of a verdict of manslaughter because the judge did not instruct the jurors that they could consider evidence of mental impairment as bearing on malice aforethought. We affirm. We also conclude that we should not exercise our power under G. L. c. 278, § 33E, in favor of the defendant.
*102 The facts are substantially undisputed. According to the defendant’s statements, he pushed his pregnant wife down the cellar stairs of their home on the morning of April 16, 1981. He went to where she lay, raised her head as high as it would go and smashed it into the concrete floor half a dozen times until “the blood started flying.” He then went to work. Consistent with his plan to act “normal” for the rest of the day, he followed the usual pattern of telling a coworker his plans for the evening; namely, that he was going to the store to get some milk and that he and his wife were planning to go to the Worcester Center to see an antique car show. He arrived home at about 4:45 p.m. and telephoned the police. He told the desk officer in a “calm” voice that he had discovered his wife at the foot of the stairs and that she might be dead.
A psychiatrist said that the defendant suffered from a mental impairment at the time of the incident. The psychiatrist opined that stress exacerbated the impairment and triggered the defendant’s behavior. 1 The expert concluded that, although the defendant had the intent to kill his wife and the capacity to plan the crime to some degree, his mental impairment precluded him from weighing the “pros and cons” of the consequences of his conduct.
1. Instruction on involuntary manslaughter. The defendant originally requested instructions on both voluntary and involuntary manslaughter. The judge refused to give either instruction. On appeal the defendant claims that the judge erred in denying his request for an involuntary manslaughter instruction. 2 There *103 was evidence that the defendant had told the police and his mother he did not mean to “do it” (i.e., kill his wife). The defendant asserts that his statement that he did not intend to kill his wife required an instruction on involuntary manslaughter. We do not agree.
Involuntary manslaughter is “an unlawful homicide,
unintentionally
caused... by an act which constitutes such a disregard of probable harmful consequences to another as to constitute wanton or reckless conduct” (emphasis supplied).
Commonwealth v. Campbell,
2.
Relief pursuant to G. L. c. 278, § 33E.
The defendant urges us to adopt a rule of diminished capacity by requiring that jurors be instructed that mental impairment may bear on malice aforethought. He points out that the definition of malice includes (1) actual intent to kill, (2) intent to do grievous bodily harm, and (3) intent to do an act creating a plain and strong likelihood of death or grievous bodily harm, see
Commonwealth
v.
Puleio,
In no case have we recognized mental impairment as a ground for negating the element of malice in prosecutions for murder.
*104
Further, this issue is not presented by the record. The defendant’s expert clearly stated that the defendant could intend the crime, that he had the capacity to plan “how he might murder his wife and still try to cover his deeds, misdeeds,” but that as to “premeditation proper ... he was impaired by reason of his mental impairment.”
Commonwealth
v.
Gould,
We have reviewed the record and conclude that there is no reason for us to order a new trial or to direct the entry of a verdict of a lesser degree of guilt. 4
Judgment affirmed.
Notes
There is no claim that the defendant lacked criminal responsibility. See
Commonwealth
v.
McHoul,
The defendant requested this instruction before the charge but did not raise the issue again after the charge. We agree with the defendant that this issue is preserved for appellate review because the judge told defense counsel that the defendant’s rights were fully protected. On appeal, the defendant does not claim any error in the denial of his request for an instruction on voluntary manslaughter. Therefore, it is deemed waived. See Mass. R. A. P. 16 (a)(4), as amended,
In his instructions, the judge explicitly differentiated between the degrees of murder, the requisite intent necessary for each, and the effect of mental impairment on the elements needed for murder in the first degree on the basis of deliberate premeditation and extreme atrocity or cruelty. The defendant does not claim that the instructions were incorrect under Massachusetts law.
The defendant filed a motion to suppress his statements to the police. The defendant’s statements were the main evidence against him. The judge ruled the statements were voluntary and admissible. He also ruled that the defendant made a knowing and intelligent waiver of the rights protected by
Miranda
v.
Arizona,
