The defendant appeals from her conviction of being accessory before the fact to larceny. The larceny involved was committed by her employer, Dr. Irwin Klepper, who defrauded the Department of Public Welfare of approximately $500,000.
The defendant raises several claims of error. She argues (1) that the prosecutor improperly used peremptory challenges to exclude nonwhite jurors; (2) that the trial judge erred in allow
We conclude that it was improper for the judge to prohibit the defendant from introducing evidence of an alleged affair betweeii the defendant’s son and Klepper’s wife. The defendant was entitled to show that Klepper harbored a particular bias against her and a motive for falsely accusing her. Compare
Commonwealth
v.
Morris, ante
114, 117-119 (1985). Contrast
Commonwealth
v.
Graziano,
A rehearsal of all the facts would serve no useful purpose; where, however, factual background is necessary to a discussion of the issues, we will allude to particular facts.
“A defendant has the
right
to bring to the jury’s attention any ‘circumstance which may materially affect’ the testimony of an adverse witness which might lead the jury to find that the witness is under an ‘influence to prevaricate’ ” (emphasis original).
Commonwealth
v.
Haywood,
Notwithstanding the extensive testimony concerning the severity of the fractious rift that had developed between the defendant and Klepper over Klepper’s personal relationship with her son and Klepper’s unwelcome interference in the son’s rearing, evidence respecting Klepper’s motive in accusing the defendant was conspicuously lacking. Contrast
Commonwealth
v.
Morris, ante
at 117-119. An opportunity to show a witness’s bias in general is not necessarily a substitute for specific inquiry on the issue of motive. See
Commonwealth
v.
Connor,
A similar problem had arisen earlier on cross-examination of Klepper when the judge excluded a question put to Klepper seeking to ascertain whether he, at some point, had learned the defendant’s son was having an affair with Klepper’s wife.
2
Based on the offer of proof
3
we think on retrial the judge should allow that question if propounded in substantially similar form. See
Commonwealth
v.
Connor, supra.
The credibility of Klepper was “essential to the proof of the defendant’s guilt, and refusal to allow cross-examination designed to show his motive for testifying [as he did] . . . [would be] a serious error.”
Commonwealth
v.
Graziano,
368 Mass, at 330. Compare
Commonwealth
v.
Morris, ante
at 118. It is always preferable that “[e]vidence of statements favorable to the defendant come [ ] from the lips of the witnesses for the prosecution” rather than the defendant.
Commonwealth
v.
Britland,
For guidance, we briefly address the defendant’s other claims of error in so far as they may have relevance on retrial.
1.
Use of peremptory challenges by the Commonwealth.
The defendant contends that the Commonwealth’s use of its peremptory challenges violated the principles set forth in
Commonwealth
v.
Soares,
2.
Admission of grand jury testimony,
(a) Passing the question whether the judge within his discretion properly could refuse a hearing on the defendant’s untimely motion to suppress grand jury testimony (see Mass.R.Crim.P. 13 [d] [2] [A],
(b) The defendant moved for a mistrial based on the alleged harm arising out of the judge’s instructions to the jury on the purpose and function of a grand jury. At retrial, the decision whether to discuss the function of the grand jury will rest with the judge, who properly may “actively solicitf ] counsel’s views on how counsel want[s] the matter handled.”
Commonwealth
v.
Williams,
3.
Testimony of Klepper.
The defendant claimed that Klepper was not competent to testify and moved to strike his testimony. See G. L. c. 233, § 20. “It is well settled that the question of the competency of a witness to testify is solely for sound discretion of the judge.”
Commonwealth
v.
Sires,
We, however, have no way of knowing, nor are we able to predict, Klepper’s mental state at the time of retrial. If it again is placed in issue, the trial judge should handle the question of the witness’s then competency in accordance with the statutory standard (G. L. c. 233, § 20), as further explained by
Commonwealth
v.
Gibbons,
378 Mass, at 770, and authorities cited. See also
Commonwealth
v.
Whitehead,
(b) The defendant requested that Klepper be ordered to submit to a psychiatric examination. The decision to order such an examination of a witness is discretionary.
Commonwealth
v.
Fillippini,
4.
Cross-examination of character witness.
The judge ruled that the defendant’s character witness could be cross-examined as to the witness’s knowledge of a specific instance of bad conduct that occurred eleven years prior to the trial. When evidence of good character is put forth, the Commonwealth may test through cross-examination the sufficiency of the basis of the witness’s reputation testimony. See
Commonwealth
v.
O’Brien,
Judgment reversed.
Verdict set aside.
Notes
At the conclusion of a lobby conference, at which the admissibility of the impeaching evidence was discussed, the judge ordered defense counsel to instruct the defendant not to relate that part of the conversation in which Klepper allegedly said: “And I did this [to you], Elba, because your son had an affair with my wife.”
“And can you tell us: at some point, getting back to [the defendant’s son], you learned he was having an affair with your wife, is that correct?”
We are mindful that “ordinarily, with respect to questions asked on cross-examination, no offer of proof is required.” Commonwealth v. Ahearn, 370 Mass, at 286.
