The defendant appeals from a conviction of murder in the first degree pursuant to G. L. c. 278, §§ 33A-33G, assigning twenty errors, but arguing only nine. 1 Because careful review of the transcript and record makes it clear that the defendant’s assignments are devoid of merit, we deal with them briefly. We affirm.
The record discloses a lengthy trial with many witnesses and contradictory testimony. We therefore find it best to discuss the specific facts as it becomes necessary to do so in the course of this opinion. Suffice it to say at this point that *368 the defendant was charged with the murder of one Cleophus Gilliam, who was shot four times with a gun later traced to the defendant. His defense was alibi: he claimed that he was elsewhere when the victim was shot and killed.
1. The defendant argues that the judge erred in allowing the victim’s wife to testify to certain matters on redirect examination. On direct examination she had related a conversation she overheard between her deceased husband and the defendant. On cross-examination she agreed that she had not given this testimony previously at a probable cause hearing. On redirect she was permitted to testify, over the defendant’s objection, that she had previously related the same information to a police officer. There was no error. It was perfectly proper to admit this evidence in order to rehabilitate the witness and to meet the possible argument of recent contrivance.
Commonwealth
v.
Pickles,
2. The defendant assigns as error the refusal of the trial judge to exclude questions asked by the district attorney which he alleges went beyond the permissible scope of redirect examination. The first line of inquiry challenged here by the defendant concerns questions put to Jesse Jackson, a witness for the prosecution, with regard to why the witness had not told police about one Greer’s being present when the witness and the defendant were together the afternoon before the murder. On cross-examination, the witness had been asked when he told police about Greer. 2 The questions asked on redirect were clearly proper to allow the witness to explain his prior testimony and were well within the scope of proper redirect examination.
One purpose of redirect examination is to allow a witness to “explain, correct or modify the evidence elicited from ... [him] on cross-examination by the defendant.”
Com
*369
monwealth
v.
Galvin,
The defendant also challenges questions asked of the witness Greer as to why it took him two hours to bring the gun given to him by the defendant from Jackson’s house to the police. These questions were proper in light of a series of questions on cross-examination which attempted to discredit the witness by stressing the inordinate length of time it took him to make an otherwise short trip. There was no error in allowing these lines of questioning on redirect examination. 3
3. The defendant contends that the judge erred in excluding a question asked on cross-examination of the witness Greer as to whether he had been committed to Boston State hospital. He urges that the question sought to elicit an answer material to the issue of the witness’s competence and credibility, and argues that its exclusion prevented him from adequately impeaching the testimony of a critical witness.
The defendant argues further that this evidence was relevant to the impeachment of the witness’s competence, credibility, and testimonial faculties. We agree that mental impairment, as well as habitual intoxication and drug addiction, may be the subject of proper impeachment if it is shown that such factors affect the witness’s capacity to perceive, remember, and articulate correctly.
Commonwealth
v.
Sacco,
4. The defendant assigns as error the admission of testimony by Mrs. Gilliam that a gun kept in her home, and later identified as the murder weapon, was missing a week before the death of the deceased. He contends that this testimony placed him in a position of defending against charges not contained in the indictment and thereby prejudiced him in the eyes of the jury. “ [W]hile evidence of other criminal or wrongful behavior may not be admitted to prove the character or propensity of the accused ..., it is admissible for other relevant probative purposes.”
Commonwealth
v.
Chalifoux,
The defendant also challenges on the same ground the trial judge’s refusal to exclude a question put to him on cross-examination as to whether he stayed overnight at the Gilliam house with a woman to whom he was not married. This argument is clearly without merit. Similar testimony had been elicited from Mrs. Gilliam earlier without objection, and defense counsel himself had previously elicited the same information in testimony from both the defendant and the woman with whom he stayed. The challenged evidence was merely cumulative, and its admission was not error.
Commonwealth
v.
Stirling,
5. There is no merit to the defendant’s contention that the admission of a transcript of sworn testimony of one
*372
Anderson Brown taken at the probable cause hearing deprived him of his Sixth Amendment right to confront the witnesses against him.
Commonwealth
v.
Mustone,
6. There was no error in the judge’s denial of the defendant’s motion for a mistrial on the ground that the judge had not questioned the jury as to whether they heard the defendant’s outburst and the subsequent commotion which took place after they had left the court room. Following the incident, the judge conducted an extensive voir dire hearing at which he questioned under oath all those involved. He found that none of the events took place in the presence of the jury, and he had the jury locked up overnight to prevent them from seeing press reports of the incident. The judge’s action in preventing any possible prejudice to the defendant from his own actions was entirely proper, and we cannot say that his findings of fact that the jury were not aware of what transpired were plainly wrong. On the contrary, we think they were plainly right.
Motions for a mistrial and to poll the jury with regard to prejudice are addressed to the judge’s sound discretion.
Shea
v.
D. & N. Motor Transp. Co.
7. The defendant assigns as error the denial of his two motions for a directed verdict of not guilty on so much of the indictment as charged murder in the first degree and murder in the second degree, respectively, on the ground that there was insufficient evidence to warrant submission of the case to the jury. G. L. c. 278, § 11.
Commonwealth
v.
Perry,
From the evidence, the jury could have found the following: The defendant was employed by the deceased without pay for approximately one month prior to the *373 killing. The deceased also employed a woman friend of the defendant and owed her back pay. The defendant spent much of the afternoon before the shooting with Greer, Jackson and one Miller, both at the Patio Lounge and at Jackson’s home. He had a gun with him at that time. Early in the evening, he visited the deceased in a shop beneath his home, and told the deceased that he would “be back later.” Subsequently, the defendant returned to Jackson’s house, where he loaded his gun and told Greer that he had a “score to take care of” which would involve stereos, televisions and cash. He further told Greer that the “score” was Gilliam, and that he “knew what he was doing.” The defendant eventually left Jackson’s house in the company of Miller. He had the loaded gun with him. He later returned with Gilliam’s van and proceeded to unload televisions, stereos and other equipment, identified as Gilliam’s, into Jackson’s home. When the defendant returned to Jackson’s home, he had his gun wrapped in bloody rags and told Greer not to worry about Gilliam’s talking to anyone, because he had just shot him. In the time period between the defendant’s departure and his subsequent return, Gilliam was shot four times at his home and died as a result of his wounds. Between leaving Jackson’s house and his subsequent return thereto, the defendant also went to Anderson Brown’s apartment to discuss returning Brown’s car. At that time, he told Brown that he had just “offed” the deceased, and had done it “gangster-style.” The next day, Greer asked the defendant if he could borrow his gun, and the defendant agreed. Greer took the gun to the police, and it was later identified as the murder weapon.
“Murder is the unlawful killing of a human being with malice aforethought. ‘Where the killing is caused by the intentional use of a deadly weapon malice may be inferred unless by the circumstances it is disproved.’ ”
Commonwealth
v.
McCauley,
Murder in the first degree requires the additional element of “deliberate premeditation.” Deliberate premeditation means that the plan to kill was formed after deliberation and reflection. However, no particular length of time is required in order for deliberate premeditation to be found.
Commonwealth
v.
Brooks,
8. There was no error by the trial judge in his refusal to charge the jury on manslaughter. “It is well established that where evidence in a murder prosecution is such that a jury could find a defendant guilty of manslaughter rather than murder it is reversible error to refuse to give such an instruction____A trial judge is not required, however, to charge on an hypothesis which is not supported by evidence.”
Commonwealth
v.
Costa,
“[Manslaughter .. . [is] ‘a killing from a sudden transport of passion or heat of blood, upon a reasonable provocation and without malice, or upon sudden combat.’ ”
Commonwealth
v.
Hartford,
9. As his last assignment of error, the defendant argues that the trial judge erred in denying his motion to poll the jury. While he recognizes that a defendant has no right to have the jury polled,
Commonwealth
v.
Roby,
10. Pursuant to the requirements of G. L. c. 278, § 33E, we have reviewed the entire transcript and record and have *376 found no reason either to order a new trial or to direct a verdict of a lesser degree of guilt.
Judgment affirmed.
Notes
Those assignments of error not argued are deemed waived.
The following colloquy took place: Q. “You never said anything about Greer being present with Caine when you testified before, did you?” A. “No, I did not.” Q. “When was the first time that you told a police officer that you and Caine and Miller and Greer left the Patio Lounge together?” A. “When was the first time?” Q. “Yes, sir.” A. “I can’t recall the first time.” Q. “You didn’t tell him that before you testified in the Roxbury District Court, did you, Mr. Jackson?” A. “No, I did not.”
“Even if the question asked on redirect examination had been beyond the scope of the cross-examination, it was within the discretion of the judge to permit matters not testified to on cross-examination to be dealt with on redirect examination.”
Commonwealth v. St. Pierre,
“While ordinarily an offer of proof is not required on cross-examination, enough must appear to show error.”
Perry
v.
Carter,
The defendant’s reliance on
Commonwealth
v.
Mendes,
On the record before us, the defendant’s conviction of murder in the first degree is probably sustainable on the ground that the killing occurred in the course of an armed robbery, a crime punishable by life imprisonment. G. L. c. 265, §§ 1, 17.
Commonwealth
v.
McNeil,
