The defendants were convicted in the Superior Court of violations of G. L. c. 94C, § 32. They appealed to the Appeals Court which reversed, finding error in the judge’s charge concerning alibi.
Commonwealth
v.
Berth,
The evidence may be summarized as follows. On September 6, 1979, the Boston police conducted a field operation in the vicinity of 1820-1950 Washington Street. Approximately twenty arrests were made during the course of this operation. Detective Logan, a member of the Drug Control Unit, testified that he was positioned in an observation vehicle on Washington Street and, with the aid of binoculars, observed what appeared to be three sales of controlled substances by the defendant Berth. Logan testified that Jones participated in two of these transactions.
Specifically, Logan testified that at approximately 10:45 a.m. , a vehicle stopped in the vicinity of 1820 Washington Street, the driver left the car and walked over to Jones. After a brief conversation, the two walked over to Berth and the driver gave Berth money in exchange for a tinfoil packet. At 11:15 a.m., another individual drove up to the vicinity of 1850 Washington Street, got out of his car, and approached Jones. Jones and the individual walked over to Berth, and the individual passed Berth money in exchange for a tinfoil packet. At 12: 15p.m., a third car arrived and a *786 passenger went directly to Berth, gave him money, and received a clear plastic bag in return. After each of these alleged sales, Berth approached another man, Michael Robinson, and gave him money.
As each transaction occurred, Logan transmitted a description of the cars involved to other police officers who subsequently stopped the vehicles and confiscated the packets. After chemical analyses, it was determined that one packet contained cocaine, one contained heroin, and a third contained no narcotic or harmful drug. A search subsequent to arrest revealed no money or drags on Jones; Berth had $45 but no drugs. Logan was the only witness who testified to observing the defendants participating in these transactions.
Berth testified that he was not present at 1820 Washington Street during the time of the transactions. He also presented an alibi witness who testified that Berth was at her home in Mattapan between approximately 10:15 a.m. and 12:00 noon, cleaning her carpets. Jones did not testify or present an alibi witness.
Counsel for Berth submitted a written request for instructions, including the alibi instruction which we approved in
Commonwealth
v.
McLeod,
Berth was the only defendant to present an alibi. Although he requested the
McLeod
instruction, he did not object at trial to the judge’s failure to give the requested instruction to the jury. See Mass. R. Crim. P. 24 (b),
Jones argues, not without some persuasion, that, although he did not present an alibi to the jury, he nevertheless benefited by Berth’s alibi and was prejudiced by the judge’s charge. He reasons that if the jury believed that Berth was not at the scene during the transactions, then they might also doubt Jones’ presence, because the testimony presented by the Commonwealth was that Jones assisted Berth in the transactions. We have held that a defendant does not present a valid objection when he objects to an error that affects only his codefendant and which does not result in prejudice to him.
Commonwealth
v.
DiStasio,
The defendants argue that the alibi instruction given requires reversal because it reduced the Commonwealth’s burden from proof beyond a reasonable doubt to a scant probability. The pertinent portion of the judge’s charge reads as follows: “Now one person says one thing. Another person says another thing as to what happened. Now Mr. Berth says he was not there at a certain time. A witness says that he was not there at a certain time. The police say that he was there at a certain time. This is the alibi, so-called; the reasoning. It’s really as simple as that. So don’t use the word ‘alibi’ as anything which might be destructive in any way whatsoever. You either believe one side or you believe the other side as to what took place.”
The last sentence of the charge quoted here states incorrectly the Commonwealth’s burden. In
Commonwealth
v.
McLeod,
This confusion regarding who bore the burden of proof was not remedied by later portions of the charge. In fact, the portion of the charge quoted here was nearly the last thing the jury heard before deliberation. For this reason, the present charge is unlike the charge we reviewed in
Commonwealth
v.
Williams,
Similarly, in
Commonwealth
v.
Bowden,
Because the instruction given in the case before us differed materially from that recommended in
McLeod
and misstated the burden of proof as to alibi, and because its effect was not mitigated by proper instructions thereafter as to the burden of proof, we hold that there is a substantial risk of a miscarriage of justice. This is especially true in light of the testimony in this case, though our holding today should not be read as requiring a judge to give a
McLeod
instruction in every case in which there is evidence of alibi even if such instruction is requested. Berth and a disinterested witness testified as to the alibi. Only one witness identified Berth as the alleged drug seller. We agree with the Appeals Court that, if the jury had been properly instructed as to alibi and if they had believed Berth’s alibi and found him not guilty on the basis of misidentification, a question might have been raised as to the accuracy of the identification of Jones.
The defendant Jones also argues error in the judge’s instruction to the jury concerning the element of intent. Specifically, he argues that since there was no direct evidence of illegal activity by him, and therefore his guilt could be established only by evidence of a joint venture, the judge’s instruction that “a person is presumed to intend the natural and probable consequences of his own acts,” impermissibly relieved the Commonwealth of its burden of proving Jones’ intent to distribute controlled substances. This portion of the charge is nearly identical to the charge we found to be error in
DeJoinville
v.
Commonwealth,
The defendants have argued a number of errors arising from certain evidentiary rulings of the judge which we discuss now very briefly because they may recur at the retrial. The defendants argue that the judge was in error in denying their requests to recross-examine Commonwealth witnesses on matters educed on the cross-examination of those witnesses by the codefendant’s counsel. We note that the extent and length of cross-examination, as well as that of recross-examination, is within the discretion of the trial judge, and his rulings thereon are seldom disturbed by an appellate court.
Commonwealth
v.
Pickles,
Finally, the defendants argue error in the judge’s failure to exclude the drugs and the testimony relating to the drugs. The defendants claim that there was a lack of positive identification or a possible break in the chain of custody. We note that any weaknesses that might exist in the identification or chain of custody of the evidence affect the weight rather than the admissibility of that evidence.
Commonwealth
v.
Hoffer,
Judgments reversed.
Verdicts set aside.
Notes
The transcript reveals the following dialogue:
Assistant district attorney: “Did you ever go to the police or anybody with this story?”
The judge: “I didn’t hear you.”
Counsel for defendant berth: “Objection.”
Counsel for defendant jones: “Objection.”
The judge: “I didn’t hear the question.”
Assistant district attorney: “It’s a legitimate question.”
The judge: “I haven’t heard it.”
Assistant district attorney: “I will repeat it a little louder. Did you ever go to the police or anyone to tell them this, give them this testimony?”
The witness: “To give them this testimony?”
Assistant district attorney: “Yes.”
The witness: me only person I talked to was my mother.”
“Okay. Thank you.” Assistant district attorney: “Okay. Thank you.”
