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 the witness' credibility, if probative of untruthfulness, may be inquired into on cross-examination of the witness and, in the discretion of the court, may be proved by extrinsic evidence. When a witness testifies to the character of another witness under subsection (a), relevant specific instances of the other witness' conduct may be inquired into on cross-examination but may not be proved by extrinsic evidence.
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. [L 1980, c 164, pt of §1; gen ch 1985; am L 1992, c 191, §2(6); am L 1993, c 6, §25 and c 198, §1(1)]