California, United States of America
The following excerpt is from People v. Prieto, F068805 (Cal. App. 2016):
"To be relevant, evidence must have some 'tendency in reason to prove or disprove any disputed fact that is of consequence to the determination of the action.' [Citation.] This definition includes evidence 'relevant to the credibility of a witness.' [Citations.]" (People v. Contreras (2013) 58 Cal.4th 123, 152; see Evid. Code, 210, 780.) "Unless precluded by statute, any evidence is admissible to attack the credibility of a witness if it has a tendency in reason to disprove the truthfulness of the witness's testimony. [Citations.]" (People v. Hawthorne (2009) 46 Cal.4th 67, 99, overruled on another ground in People v. McKinnon (2011) 52 Cal.4th 610, 637-643.)
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