On December 21, 1979, a Superior Court jury convicted Parenti of armed robbery and unlawfully carrying a firearm. On December 24, 1979, it convicted him of assault with intent to kill. See G. L. c. 265, § 29;
Commonwealth
v.
Demboski,
The East Arlington branch of the Suburban National Bank was robbed on May 3, 1979, by two masked men carrying pistols. The jury could have found that Parenti and an accomplice were the robbers and that they fled the scene in a blue automobile driven by the accomplice. Officer Thomas Calautti of the Arlington police arrived at the bank in a marked police cruiser just as the blue car pulled away. He immediately gave chase. At a point more than a mile from the bank, Parenti leaned his upper body out of the passenger window and fired three shots in the direction of the pursuing police cruiser. When the shots were fired, the cruiser was approximately 100 to 200 feet behind the blue car. The vehicles were then traveling at a speed between forty and fifty miles per hour. None of the shots hit the cruiser. Parenti was captured by other police officers after he jumped from the moving vehicle.
*698 Before closing arguments, the prosecutor, Parenti’s trial counsel, and the judge discussed jury instructions on the charge of armed assault with intent to murder. Both counsel concurred in the judge’s view that the jury should also be instructed on assault with intent to kill, which was perceived as a lesser-included offense within the charge of armed assault with intent to murder. 1 In his main charge, the judge stated that assault with intent to kill “describes in essence the crime of manslaughter as opposed to murder.” He then went on to define manslaughter as “the intentional doing of a wanton or reckless act absent an intent to kill, but the act or acts are so dangerous, reckless and wanton that they are likely to cause death or grave bodily harm.” Parenti’s counsel made no objection to these instructions. The jury subsequently returned guilty verdicts ón the armed robbery and firearms charges. After additional deliberations on the assault indictment, however, the jury made a request for a “definition on ‘armed assault with intent to kill.’” In response to the request, the judge further instructed the jury that “we are talking about the doing of an intentional act which if completed would be manslaughter and not murder. Manslaughter is an unintentional killing which results from the doing of a wanton or reckless act that is likely to cause death or serious bodily injury.” Parenti’s counsel did not object to the supplementary instruction, requesting instead that the instruction be expanded to permit *699 the jury to consider the “lesser-included offense of simple assault.” The judge refused the request.
1. The Supreme Judicial Court has held that “an attempt to commit involuntary manslaughter is logically impossible” because an attempt necessarily involves intent and “[i]nvoluntary manslaughter is homicide unintentionally caused.”
Commonwealth
v.
Hebert,
2. In dicta, the Hebert court also reconfirmed the cases in which assault with intent to kill was treated as assault with intent to commit manslaughter and recognized the identity between this crime and “attempted voluntary manslaughter.” The court concluded that “the crime is more likely to be understood by a jury if it is referred to as ‘assault with intent to kill’ rather than as ‘assault with intent to commit manslaughter,”’ Hebert, supra at 538, in part because “ [manslaughter may comprehend a variety of cases where intent to kill is not essential,” including “cases of wanton or reckless conduct.” Id. at 538-539. It is clear that the Hebert court comprehended assault with intent to kill as encompassing only those assaults which carry the legal potential for conviction of voluntary manslaughter if death ensues. Since the judge’s instructions referred to the *700 crime of “manslaughter,” committed by wanton or reckless conduct, we must inquire whether that theory will support a conviction for assault with intent to kill on a voluntary manslaughter theory in view of the language in Hebert. We conclude it should not.
The degree of danger accompanying an act causing an unintended death may, when judged in light of common experience, result in the actor’s being held liable for murder. See, e.g.,
Commonwealth
v.
Pierce,
It would be theoretically possible to formulate a category of manslaughter based upon wanton or reckless conduct which poses a higher degree of risk than the risk of involuntary manslaughter described in
Welansky,
and add the resulting offense to those already treated as voluntary manslaughter. The line between the two offenses could most logically be drawn at the point where the defendant’s conduct creates a probability of death as distinguished from the “high degree of likelihood [of] substantial harm” described in
Welansky, supra
at 399. To express voluntary manslaughter, however, in terms of more aggravated conduct than that considered in the
Welansky
case would be so closely approximate the definition of malice required to convict of murder that the distinction between manslaughter and murder in cases of wanton or reckless conduct for all practical purposes would be obliterated. Unnecessary dupli
*702
cation and confusion among serious offenses would be the result. While “drastic simplification is doubtless desirable,” see
Commonwealth
v.
Starling,
This conclusion is consistent with
Commonwealth
v.
Demboski,
3. Although Parent! made no objection to the judge’s charge, he is entitled to relief since he was convicted on instructions of law which defined a logically impossible form of assault with intent to kill.
4
See
Commonwealth
v.
Freeman,
Neither are we persuaded by the Commonwealth’s argument that judgment should be entered on the lesser-included offense of assault with a dangerous weapon. G. L. c. 265, § 15B. That offense is a lesser-included offense of armed assault with intent to murder, G. L. c. 265, § 18, the crime charged in the indictment, since conviction under § 18 requires a finding that the assault occurred by means of a dangerous weapon. The defendant, however, was convicted under G. L. c. 265, § 29, not under § 18. “In determining whether, on the basis of a single act, a defendant may be prosecuted and punished for two statutory or com
*704
mon law crimes, the long-prevailing test in this Commonwealth is whether each crime requires proof of an additional fact that the other does not. ... If so, neither crime is a lesser-included offense of the other . . . .”
Commonwealth
v.
Jones,
382 Mass, at 393. Successful prosecution under G. L. c. 265, § 29, for an assault with intent to kill does not require proof that the defendant was armed with a dangerous weapon as is required for conviction under c. 265, § 15B. Since all the elements of a lesser-included offense must by definition be present in the greater offense, it follows that G. L. c. 265, § 15B, which contains an element distinct in law from those which constitute a crime under G. L. c. 265, § 29, is not included in the latter offense.
6
The Commonwealth, however, may seek to retry Parenti on a new indictment under G. L. c. 265, § 15B. Cf.
Salemme
v.
Commonwealth,
4. The issue of Parenti’s accidental encounter and exchange of words with two jurors while handcuffed, occurring after the jury had returned its verdicts on the robbery and firearms charges, need not be considered in view of our conclusion that the conviction on the assault indictment then remaining before the jury must be reversed. Objection was also made to a suggestion in the prosecutor’s closing argument that had Officer Calautti attempted to leave his cruiser and approach the automobile he was following at a stoplight, “we wouldn’t just be trying an armed assault with
*705
intent to murder today, but a much more serious case.” Parenti contends that this argument went beyond any permissible inferences from the evidence, see
Commonwealth
v.
Hawley,
The judgments on indictments No. 79-1362 and No. 79-1366 are affirmed. The judgment on indictment No. 79-1364 is reversed and the verdict is set aside. On that indictment, judgment is to be entered for the defendant.
So ordered.
Notes
The fact that Parenti was leaning out of the window of a speeding automobile when he fired the shots could have explained his poor marksmanship and would have permitted the jury to find that he intended to hit the cruiser and kill the officer. If the jury accepted this hypothesis, they would have been warranted in finding the defendant guilty of armed assault with intent to murder. On the other hand, the jury could have found, based upon the distance between the vehicles when the shots were fired, the size of the cruiser, and the number of shots fired to no effect, that Parenti may have been making a conscious effort not to hit the officer. If so, the mental element necessary to convict him of armed assault with intent to commit murder would have been negated. As will be explained later in this opinion, however, assault with intent to kill was not a lesser-included offense on the indictment under G. L. c. 265, § 18.
The
Huot
court explained that the element of “[m]alice aforethought [in murder] includes an unexcused intent to kill, to do grievous bodily harm, or to do an act creating a plain and strong likelihood that death or grievous bodily harm will follow.” 380 Mass, at 408. The
Swift
decision quoted verbatim the
Chance
definition of malice in applying the es
*701
tablished Massachusetts rule that the fact finder can infer malice from the circumstances of the crime. 382 Mass, at 83. See also
Commonwealth
v.
Starling,
In
Commonwealth
v.
Jervis,
We note in passing that in defining manslaughter by reckless or wanton conduct, the judge strayed from the language of Welansky, supra, which speaks in terms of conduct involving “a high degree of likelihood that substantial harm will result.” 316 Mass, at 399. The judge’s charge referred to “acts ... so dangerous, reckless and wanton that they are likely to cause death or grave bodily harm.” This arguably sets a higher standard of danger than required by Welansky and comes close to duplicating the language of Commonwealth v. Chance, supra, describing malice.
The Commonwealth theorizes that if the officer had been killed the resulting homicide would have been felony-murder. The Commonwealth concludes from that assumption that the unsuccessful assault was an assault with intent to commit felony-murder, that the defendant was not entitled to any instruction on assault with intent to kill, and that the defendant, as a result, could only have benefited from the instruction he received. . The contention is difficult to follow but appears to invite recognition of the crime of assault with intent to commit felony-murder under G. L. c. 265, § 18. We reject any such formulation as beyond the statute’s intent.
It is of no significance that counsel and the judge below consistently referred to the § 29 offense as “armed assault with intent to kill,” and that the defendant’s conviction was so recorded on the docket. It appears indisputable that whatever crime was committed here was committed with a dangerous weapon. It is just as clear, however, that one need not have been so armed to be convicted, as the defendant was, under G. L. c. 265, § 29. “For offenses to be identical they must be the same in law and in fact. If the offenses are distinct in law, it is of no consequence how nearly they may be connected in fact.”
Commonwealth
v.
Hogan,
