Rule 608.
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/mt/title-26/chapter-10/part-6/608·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Rule 608 . Evidence of character and conduct of witness.
(a)Opinion and reputation evidence of character. The credibility of a witness may be attacked or supported by evidence in the form of opinion or reputation, but subject to these limitations:
(1)the evidence may refer only to character for truthfulness or untruthfulness, and
(2)evidence of truthful character is admissible only after the character of the witness for truthfulness has been attacked by opinion or reputation evidence or otherwise.
(b)Specific instances of conduct. Specific instances of the conduct of a witness, for the purpose of attacking or supporting the witness' credibility, may not be proved by extrinsic evidence. They may, however, in the discretion of the court, if probative of truthfulness or untruthfulness, be inquired into on cross-examination of the witness
(1)concerning the witness' character for truthfulness or untruthfulness, or
(2)concerning the character for truthfulness or untruthfulness of another witness as to which character the witness being cross-examined has testified.
The giving of testimony, whether by an accused or by any other witness, does not operate as a waiver of the witness' privilege against self-incrimination when examined with respect to matters which relate only to credibility.