California Code, Government Code - GOV § 27520

(a) The coroner shall cause to be performed an autopsy on a decedent, for which an autopsy has not already been performed, if the surviving spouse requests him or her to do so in writing. If there is no surviving spouse, the coroner shall cause an autopsy to be performed if requested to do so in writing by a surviving child or parent, or if there is no surviving child or parent, by the next of kin of the deceased.

(b) The coroner may cause to be performed an autopsy on a decedent, for which an autopsy has already been performed, if the surviving spouse requests him or her to do so in writing. If there is no surviving spouse, the coroner may cause an autopsy to be performed if requested to do so in writing by a surviving child or parent, or if there is no surviving child or parent, by the next of kin of the deceased.

(c) The cost of an autopsy requested pursuant to either subdivision (a) or (b) shall be borne by the person requesting that it be performed.