The character rule -- the prohibition against the use of character to show conduct -- does not bar the use of a person's bias against some person or some thing or a person's motive to show the person's conduct because a matter such as bias or motive is a transitory or localized attitude and is not a character trait, a disposition, or a propensity.

United States v. Saniti, 604 F.2d 603, 604 (9th Cir. 1979) (upholding trial court's admission of witness's testimony about accused's expensive drug habit where it was relevant to show accused's motive for robbing the bank).Another act, wrong, or crime is admissible to show a motive for some alleged conduct on a particular occasion.

Santa Barbara Capital Mgmt. v. Neilson (In re Slatkin), 525 F.3d 805, 812-813 (9th Cir. 2008) (holding, in plaintiff trustee's adversary proceeding against defendant investors, that the bankruptcy court properly admitted the debtor's plea agreement....The hearsay exception created by Federal Rule of Evidence 807 or a parallel State rule applies only if admission of the affected statement in evidence serves the interests of justice and the general purposes of the law of evidence.

Cf. United States v. Gwathney, 465 F.3d 1133, 1140-1142 (10th Cir. 2006) (holding that the trial court erroneously admitted Western Union's response to the DEA's subpoena as a business record exception because the proper foundation....There is a hearsay exception for a memorandum, report, record, or data compilation, in any form, of acts, events, conditions, opinions, or diagnoses, made at or near the time by, or from information transmitted by, a person with knowledge, if kept in the course of a regularly conducted activity of a business, institution, association, profession, occupation, or calling if it was the regular practice of that business, institution, association, profession, occupation, or calling to make the memorandum, report, record or data compilation, unless the source of information or the method or circumstances of preparation indicate lack of trustworthiness.