Alaska R. Evid. 608

(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. If a witness testifies

concerning the character for truthfulness or untruthfulness of a

previous witness, the specific instances of conduct probative of

the truthfulness or untruthfulness of the previous witness, may

be inquired into on cross-examination. Evidence of other

specific instances of the conduct of a witness offered for the

purpose of attacking or supporting that witness’ credibility is

inadmissible unless such evidence is explicitly made

admissible by these rules, by other rules promulgated by the

Alaska Supreme Court or by enactment of the Alaska

Legislature.

(c) Admissibility. Before a witness may be impeached

by inquiry into specific instances of conduct pursuant to

subdivision (b), the court shall be advised of the specific

instances of conduct upon which inquiry is sought and shall

rule if the witness may be impeached by such inquiry by

weighing its probative value against its prejudicial effect.