California Code, Evidence Code - EVID § 1046

In any case, otherwise authorized by law, in which the party seeking disclosure is alleging excessive force by a peace officer or custodial officer, as defined in Section 831.5 of the Penal Code, in connection with the arrest of that party, or for conduct alleged to have occurred within a jail facility, the motion shall include a copy of the police report setting forth the circumstances under which the party was stopped and arrested, or a copy of the crime report setting forth the circumstances under which the conduct is alleged to have occurred within a jail facility.