Rule 405 Federal Rules of Evidence
Rule 405 of the Federal Rules of Evidence is about Methods of Proving Character. It is under Article IV (Relevance and Its Limits) of the Rules.
(a) By Reputation or Opinion. When evidence of a person’s character or character trait is admissible, it may be proved by testimony about the person’s reputation or by testimony in the form of an opinion. On cross-examination of the character witness, the court may allow an inquiry into relevant specific instances of the person’s conduct.
(b) By Specific Instances of Conduct. When a person’s character or character trait is an essential element of a charge, claim, or defense, the character or trait may also be proved by relevant specific instances of the person’s conduct.