Cal. Lab. Code § 5706
Where it is represented to the appeals board, either before or after the filing of an application, that an employee has died as a result of injuries sustained in the course of his employment, the appeals board may require an autopsy. The report of the physician performing the autopsy may be received in evidence in any proceedings theretofore or thereafter brought. If at the time the autopsy is requested, the body of the employee is in the custody of the coroner, the coroner shall, upon the request of the appeals board or of any party interested, afford reasonable opportunity for the attendance of any physicians named by the appeals board at any autopsy ordered by him. If the coroner does not require, or has already performed the autopsy, he shall permit an autopsy or reexamination to be performed by physicians named by the appeals board. No fee shall be charged by the coroner for any service, arrangement, or permission given by him.
Ca. Lab. Code § 5706