On May 14, 1976, a grand jury for the county of Suffolk indicted the defendant Paul L. Francis and one George A. Sarro, Jr., for the crime of breaking and entering in the nighttime with intent to commit a felony, to wit, larceny. Sarro pleaded guilty to the offense and received a sentence of nine to twelve years at the Massachusetts Correctional Institution at Walpole. The defendant *212 pleaded not guilty, and so proceeded to trial. At trial, the defense called Sarro as its only witness. As to the majority of questions posed by the defense, however, Sarro invoked his Fifth Amendment privilege against self-incrimination. The jury found the defendant guilty and the judge sentenced him to a six-year term at the Massachusetts Correctional Institution at Concord.
The defendant appeals pursuant to G. L. c. 278, §§ 33A-33G, claiming that, by sustaining Sarros refusal to testify on Fifth Amendment grounds, the judge deprived him of a fair trial. We transferred the case here on our own motion. For the reasons discussed below, we affirm.
The pertinent facts are as follows. In the early morning hours of April 14, 1976, an alarm sounded in the home of one John Hagerty, manager of the F. W. Woolworth Co. store (Woolworth) in East Boston. Because the alarm indicated that there might be an intruder in the store, Hagerty went to the police and accompanied two officers to the Woolworth store premises.
When Hagerty and the police officers entered the front door of the store, they observed the aftermath of a break-in. Cases of merchandise had been broken open and were strewn about the store. Toward the rear of the store, a hole measuring approximately six feet in width had been made in the ceiling, and a ladder and rope had been extended through the hole to the floor. Merchandise had been piled into baskets and placed at the base of the ladder. Near these baskets Hagerty also discovered a large, partially melted candle which was not Woolworth merchandise. He observed melted wax near the broken cases of merchandise and at various other locations in the store.
While the officers made a call for additional police assistance, Hagerty observed two individuals escaping from the Woolworth roof by sliding down from the roof of an adjacent store. Police officers en route to the scene also observed two men in the vicinity of the store, one of whom was pulling white tags from a green hooded jacket worn by the *213 other. When these officers learned of Hagerty’s observations, they returned to the street to try to find the men.
A short time later the officers arrested two individuals subsequently identified as Francis and Sarro. At the time of the arrest, Francis, the defendant, wore a green hooded jacket which Hagerty identified as Wool worth merchandise. On the jackets of both men, the police observed melted wax, which, according to the testimony of a senior criminalist with the Boston police crime laboratory, had a common origin with the wax in the candle discovered in the store.
At the trial, the defense sought to prove through Sarro’s testimony that the defendant had not been with Sarro during the initial break-in, but had only joined the witness later, after Sarro discovered that he could not remove all the merchandise alone. It was the defendant’s theory that, because he did not aid in the initial breaking, he was not guilty of the crime charged in the indictment.
Independent counsel advised Sarro that he could be charged with conspiracy if his involvement with Francis were established. Sarro thus answered questions concerning his own activity in the break-in, but declined to answer questions with regard to his method of operations, and refused to disclose whether or not the defendant accompanied him. 1
In
Washington
v.
Texas,
Under these principles, rules which work arbitrarily to limit a defendant’s ability to call witnesses, see
Washington
v.
Texas, supra
at 23, or which so restrict the scope of cross-examination that a defendant is precluded from impeaching the credibility of a prosecution witness, see
Davis
v.
Alaska,
Nevertheless, it is well established that “the right to confront and to cross-examine [witnesses] is not absolute and may, in appropriate cases, bow to accommodate other legitimate interests in the criminal trial process.”
Chambers
v.
Mississippi, supra
at 295.
United States
v.
Nobles,
Since the decision of
Malloy
v.
Hogan,
Answering the questions posed by the defense could have incriminated the witness in two respects. First, under Massachusetts law, an indictment for conspiracy does not merge with the underlying substantive offense. G. L. c. 278, § 2A. Thus, notwithstanding the fact that Sarro had pleaded guilty to a breaking and entering charge, he might
*216
have provided a substantial link in the chain of evidence needed to prosecute him for the separate offense of conspiracy had he been forced to testify to concerted action with the defendant. See
Commonwealth
v.
Smith,
Second, it must be remembered that when the two men were apprehended, the police found Wool worth merchandise on the defendant’s person. Under G. L. c. 274, § 2, as appearing in St. 1973, c. 529, § 1, one who “aids in the commission of a felony . . . shall be punished in the manner provided for the punishment of the principal felon.” Therefore, had Sarro testified to prior activity during the break-in, he could have exposed himself to a larceny charge in conjunction with such a charge against the defendant.
The defendant’s argument that, as a practical matter, Sarro faced no danger because an additional sentence for conspiracy was unlikely, misconceives the applicable law. See
United States
v.
Johnson,
Having satisfied the applicable Federal standards, the witness’s claim of privilege is subject only to the further condition that it be made in a timely manner. “It has long been the law in Massachusetts that if an ordinary witness . . . voluntarily testifies to a fact of an incriminating nature, he waives his privilege as to subsequent questions seeking related facts.”
Taylor
v.
Commonwealth,
It is true that if a witness “consents to testify to one matter tending to [injcriminate himself, he must testify fully in all
*217
respects relative to that matter . . . .”
Evans
v.
O’Connor,
174 Mass, 287, 291 (1899). However, by agreeing to testify with respect to one unlawful act, the witness “does not thereby waive his privilege of refusing to reveal other unlawful acts . . . .”
Id.
See
United States
v.
Pierce,
The witness properly answered questions concerning his sole activity during the break-in. His plea of guilty to the charge of breaking and entering granted him immunity from further prosecution for the indicted offense.
Namet
v.
United States,
Judgment affirmed.
