Cal. Welf. & Inst. Code § 5004.5

Notwithstanding any other provision of law, a legal guardian, conservator, or any other person who reasonably believes a mentally disordered or developmentally disabled person is the victim of a crime may file a report with an appropriate law enforcement agency. The report shall specify the nature of the alleged offense and any pertinent evidence. Notwithstanding any other provision of law, the information in such report shall not be deemed confidential in any manner. No person shall incur any civil or criminal liability as a result of making any report authorized by this section unless it can be shown that a false report was made and the person knew or should have known that the report was false.

Where the district attorney of the county in which the alleged offense occurred finds, based upon the evidence contained in the report and any other evidence obtained through regular investigatory procedures, that a reasonable probability exists that a crime or public offense has been committed and that the mentally disordered or developmentally disabled person is the victim, the district attorney may file a complaint verified on information and belief.

The filing of a report by a legal guardian, conservator, or any other person pursuant to this section shall not constitute evidence that a crime or public offense has been committed and shall not be considered in any manner by the trier of fact.