Cal. Welf. & Inst. Code § 5542

County patients’ rights advocates shall have the right to inspect or copy, or both, any records or other materials not subject to confidentiality under Section 5328 or other provisions of law in the possession of any mental health program, services, or facilities, or city, county or state agencies relating to an investigation on behalf of a client or which indicate compliance or lack of compliance with laws and regulations governing patients’ rights, including, but not limited to, reports on the use of restraints or seclusion, and autopsy reports.