California Code, Vehicle Code - VEH § 20014

All required accident reports and supplemental reports and all reports made to the Department of the California Highway Patrol by any peace officer, member of the Department of the California Highway Patrol, or other employee of the Department of Motor Vehicles and the Department of the California Highway Patrol, shall be immediately available for the confidential use of any division in the department needing the same, for confidential use of the Department ofTransportation, and, with respect to accidents occurring on highways other than state highways, for the confidential use of the local authority having jurisdiction over the highway.