I shoulda looked before I asked my question.
By the way, here is what Federal Rule of Evidence 608 provides on attacking the credibility and conduct of a witness:
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. In this regard, I am not sure how, under Colorado's rules of evidence, a prior suicide attempt impacts on the question of the alleged victim's credibility in this matter.