The character, disposition, or propensity of an alleged crime victim sometimes may be used to show the victim's conduct on a specific occasion.

Fed. R. Evid. 607 ("The credibility of a witness may be attacked by any party, including the party calling the witness.").Subject to numerous limitations and exceptions, evidence probative of the credibility of a witness is admissible to impeach the witness.

Pierce v. County of Orange, 519 F.3d 985, 995 (9th Cir. 2008) (holding, in plaintiff pre-trial detainees' class action against defendants county and sheriff, that evidence of statements of absent class members was....If a statement is made by a party and the statement is offered against the party that made the statement, the federal law of evidence characterizes such a statement as non-hearsay and exempts it from the hearsay prohibition found in Federal Rule of Evidence 802 or a comparable State rule even though the exempted statement otherwise satisfies the definition of hearsay given in Rule 801(c) or a comparable State rule.

Union Mutual Life Insurance Co. v. Chrysler Corp., 793 F.2d 1, 8-9 (1st Cir. 1986) (holding, in plaintiff lending company's action against defendants computer leasing company and another lessee company for breach of lease agreement, that the....A statement is imputed to a principal or to an employer and is treated as the principal's or employer's vicarious admission (which, like other admissions is exempt from the hearsay rule) if the principal or employer is a party, the statement is offered against the principal or party, the statement is a statement by the party's agent or employee about a matter within the scope of the agent's agency or the employee's employment, and the statement is made during the principal-agent or employer-employee relationship.