After trial by a jury of six, the defendant, Kenneth P. Stathopoulos, was convicted of operating a motor vehicle while under the influence of intoxicating liquor, G. L. c. 90, § 24(1) (a) (1), and operating a motor vehicle negligently so that the lives and safety of the public might be endangered,
The Appeals Court accurately summarized the facts as follows. “At approximately 3:20 a.m. on August 28, 1984, a Metropolitan District Commission police officer observed the defendant driving a jeep at a speed of from fifty to sixty miles per hour through two successive red lights on Washington Street in Somerville between Union Square and the Charles-town district of Boston. When stopped by the officer, the defendant resisted arrest. The odor of alcohol was on his breath; he displayed most of the classic symptoms of intoxication; and he fared badly on five separate field sobriety tests, two of them conducted at the scene of the arrest and three of them at the Lower Basin police station. A postarrest search of the defendant yielded five yellow pills which, on later chemical analysis, were determined to contain phencyclidine (PCP), a Class B controlled substance. The defendant attempted without success to recover and swallow the pills, became violent, had to be restrained by leg irons as well as handcuffs, and was taken to Massachusetts General Hospital for several hours of observation.”
“At some point the defendant was given a breathalyzer test, which showed a blood alcohol content by weight of .07 percent. G. L. c. 90, § 24 (1) (<?). The officer who had performed the test expressed the opinions (on cross examination) that the .07 reading was inconsistent with the irrational behavior which the defendant had exhibited in the police station and that the defendant had been under the influence of a combination of alcohol and ‘something else.’ [
1
] Such of the pills as had not been
1. Instructions on driving while under the influence of intoxicating liquor. The defendant does not contest the sufficiency of the evidence to support the conviction. He argues only that two of the instructions were erroneous. We turn to the instructions.
In assessing the charge, we are mindful that “the adequacy of instructions must be determined in light of their over-all impact on the jury.”
Commonwealth
v.
Sellon,
We reject the Appeals Court’s conclusion that “the only instruction which may properly be given a jury in a case such as the present is one to the effect that, although they may find that the defendant had ingested a narcotic or other proscribed substance which may have rendered him more susceptible to the intoxicating effect of liquor,
they cannot convict unless
We also think that the concept of “efficient cause” is not helpful in cases where a defendant is charged with operating under the influence of intoxicating liquor. “Efficient cause” has been defined by this court as the “cause that necessarily sets in operation the factors which caused” the prohibited result,
Commonwealth
v.
Rhoades,
Further, the Appeals Court’s opinion may be read to require the Commonwealth to prove “intoxication” in a prosecution for driving under the influence of intoxicating liquor. We reject any such requirement. In
Connolly,
we held that “the Commonwealth must prove beyond a reasonable doubt that the defendant’s consumption of alcohol diminished the defendant’s ability to operate a motor vehicle safely” (emphasis deleted).
Commonwealth
v.
Connolly, supra
at 173. The Commonwealth is not required to prove that the defendant was drunk.
Id.
at 172.
Commonwealth
v.
Bernier,
Judgments affirmed.
Notes
The defendant also was charged with operating a motor vehicle while under the influence of narcotic drugs, but was acquitted of this charge at the bench trial in the District Court. The record reveals that at the time of that proceeding, the State chemist’s drug analysis certificate was not available.
At the outset of the trial, the judge told the jurors that “[a] person is under the influence of intoxicating liquor if at the time of his consumption and as a result of his consumption of alcoholic beverages, his ability to operate a motor vehicle safely has been reduced, diminished.”
In the body of the charge, the judge said: “A person is under the influence if at the time of his or her consumption of intoxicating liquor it has diminished his ability to operate a motor vehicle safely. ... It [operating under the influence] also includes any condition which results from indulging in any degree in intoxicating liquor which has negatively affected the defendant’s cleanness of intellect and his self-control and as a result of that has diminished or reduced his capacity to operate safely. . . . [I]f your ingestion of the alcohol in so small or so large an amount diminishes your capacity, reduces your capacity to operate a motor vehicle safely, then you’ve violated our law, by operating a motor vehicle, of course. A person, ladies and gentlemen, is under the influence of intoxicating liquor when he’s affected by it to the extent that his judgment, his alertness, his ability to respond promptly and effectively to unexpected emergencies, is diminished because of the consumption of alcoholic beverages.”
The statute provides in relevant part: “Whoever . . . operates a motor vehicle while under the influence of intoxicating liquor, or of marihuana, narcotic drugs, depressants or stimulant substances, all as defined in section one of chapter ninety-four C . . . shall be punished ...” (emphasis supplied). G. L. c. 90, § 24 (1) (a) (1) (1986 ed.).
We agree with the observation made in the Appeals Court dissent that “[i]f, given the evidence in the case, the judge had not said something to the effect that a guilty verdict was warranted if a mixture of drugs and alcohol diminished the defendant’s capacity, he would have left the jurors in a state of confusion.”
We note, however, that an appropriate instruction in these circumstances might be similar to the following: You are instructed that, if the defendant’s ability to operate safely was diminished by alcohol, the defendant has violated the statute even though some other cause, also operating on the
Subsequent to the two Maine cases cited here, the Maine Legislature • in 1981 enacted a combined influence statute. See Me. Rev. Stat. Ann. tit. 29, § 1312-B(1)(A).
An appropriate instruction in these circumstances is suggested in note 4, supra.
The defendant did not object to these instructions at trial. On appeal, the defendant claims a risk of a miscarriage of justice was created because the instructions allegedly (1) permitted the jury to find the defendant guilty if his driving endangered only himself; and (2) did not state expressly that the Commonwealth’s burden of proof, which the judge explained in general terms, applied to each element of the offense.
