The defendant was convicted of robbery and mayhem in a jury waived trial in the Superior Court. The cases were taken on appeal under the provisions of G. L. c. 278, §§ 33A-33G, and were transferred here from the Appeals Court pursuant to G. L. c. 211 A, § 10 (A). The evidence can be briefly stated.
On March 19, 1972, the victim, one William Howard Cole, encountered the defendant at “The Vets,” a drinking establishment in Lawrence. From there they proceeded to a series of drinking spots, traveling in a car driven by the defendant. They departed the last establishment in the company of three other individuals, two brothers named Dennis Dietrich and Ernest Dietrich, *456 and Walter Coyne, Third. 1 In due course the car turned off a Methuen street onto a snow covered road running between a playground and a cemetery. The car stopped and everyone alighted. Thereupon Cole was robbed of his wallet and unmercifully beaten. He was kicked in the head repeatedly, struck with a broken beer bottle, and a cemetery urn was dropped on his chest. As a result he received numerous lacerations, his jaw and right leg were fractured, and his left ear was partially torn off. His assailants left him in this condition in the snow,> clad only in his undershorts, his clothes having been ripped off in the process of his beating. It appears that the four occupants of the car other than Cole then returned to the English Social Club in Lawrence, one of the drinking spots they had visited previously that day. On the following day the police found two stained jackets behind the English Social Club building. The manager at that club identified one of these jackets as that worn by the defendant on the previous evening. It was introduced as an exhibit. Further reference to testimony will be made as required hereafter.
The appeal brings three issues here: (1) the judge’s refusal to make findings of not guilty of the robbery and mayhem charges; (2) an alleged denial of the right of confrontation with respect to the testimony of the witness Coyne; and (3) an alleged denial of due process in the judge’s conduct of certain aspects of the trial.
1. In considering the defendant’s motion for findings of not guilty (only Michel has perfected his appeal), we consider the evidence most favorable to the Commonwealth.
Commonwealth
v.
Burns,
2. The defendant claims error in the judge’s refusal to strike direct testimony of the witness Coyne after the defendant was allegedly denied the right to cross-examine Coyne fully relative to possible bias. This argument stems from an arrangement made by Coyne with the prosecution where in exchange for Coyne’s testimony the prosecution would nol pros the indictments against Coyne in the instant cases, as well as file a disclaimer of two rape charges then pending against him. Since all negotiations with the prosecutor’s office were handled by Coyne’s attorney in his absence the judge instructed Coyne as to the attorney-client privilege, telling him that he need not answer questions about his arrangements with the prosecutor which would involve “ [a]ny talk between you and . . . [your attorney], where there was nobody else there.”
It has long been the law in the Commonwealth that parties are entitled as matter of right to reasonable cross-examination of a witness for the purpose of showing bias.
Commonwealth
v.
Russ,
It is thus apparent that in certain circumstances assertion of an attorney-client privilege in such a way as to prevent the defense from exposing the bias of an important witness may deprive the defendant of his constitutional rights. Properly applied, however, the privilege should present no obstacle to inquiry into promises made to the Commonwealth’s witnesses. Typically, as in this instance, discussions will have taken place with counsel of a prospective witness in the absence of the witness. A. B. A. Standards Relating to the Administration of Criminal Justice, The Prosecution Function, § 4.1 (b) (1974); The Defense Function, § 6.2 (1974), and commentary in Approved Draft (1971). But from the fact that such a prospective witness is educated on the arrangements with the prosecution only through his counsel it does not follow that the attorney-client privilege prevents inquiry into the details of the arrangements. The privilege applies only to matters discussed between the attorney and his client which are confidential in nature, and not to matters known to third persons, or intended to be made public.
Ramacorti
v.
Boston Redevelopment Authy.
It would thus appear that the judge may have defined the privilege too broadly in instructing Coyne that he need not disclose anything that he and his attorney had discussed. In any event, we do not believe that the defendant’s constitutional rights were impaired. Whatever Coyne believed to be the scope of his privilege, it is evident that the privilege was waived. On cross-examination he was asked by counsel for a codefendant to describe the substance of his conversation with his attorney with regard to any charges pending against him. We quote from the colloquy.
Counsel for the defendant: “What was said?” The witness: “What was said?” Counsel for the defendant: “Yes.” The witness: “He said if I testify, these charges would be dropped.” Counsel for the defendant: “And if you didn’t testify?” The witness: “I would be hit with a big bit.” Counsel for the defendant: “What did that mean to you?” The witness: “What do you mean, what?” Counsel for the defendant: “The big bit?” The witness: “Fifteen to 20 years.”
A similar colloquy took place at another point in the cross-examination. In addition, the prosecution itself called to the stand the first assistant district attorney for Essex County who described in great detail all negotiations with Coyne’s attorney which preceded Coyne’s testimony for the Commonwealth. Therefore, despite the potential limitation on cross-examination which was the consequence of the judge’s broad instruction on the privilege, the issue of the witness’s bias was fully before the fact finder and the defendant’s rights were amply
*462
protected.
State
v.
Brown,
321 Atl. 2d 478, 485 (Maine 1974). Cf.
Davis
v.
Alaska,
3. The defendant makes reference to four alleged shortcomings in the conduct of the trial which he says, considered together, denied him due process and equal protection, (a) After the victim Cole had completed his testimony, the judge remanded him to the sheriff on a presumption of perjury. The defendant said that this was an indication that the judge was aware of extraneous facts not in evidence, since Cole’s statements were not so contradictory as to constitute perjury. But the judge operated within the authority of G. L. c. 268, § 4, in concluding that this testimony created a reasonable presumption of perjury. The judge had an opportunity to observe the witness’s demeanor and “had a right to use his knowledge of human nature and his judicial experience in determining the character of the testimony.”
Blankenburg
v.
Commonwealth,
Judgments affirmed.
Notes
Michel, the two Dietrichs, and Coyne were all indicted for robbery and mayhem and tried jointly. During the trial the indictments against Coyne were nol pressed and he was given immunity from any future proceedings except for perjury related to any testimony he might give as a witness in the trial.
