Cal. WIC § 5210

At the time a person is taken into custody for evaluation, or within a reasonable time thereafter, unless a responsible relative or the guardian or conservator of the person is in possession of the person’s personal property, the person taking him into custody shall take reasonable precautions to preserve and safeguard the personal property in the possession of or on the premises occupied by the person. The person taking him into custody shall then furnish to the court a report generally describing the person’s property so preserved and safeguarded and its disposition, in substantially the form set forth in Section 5211; except that if a responsible relative or the guardian or conservator of the person is in possession of the person’s property, the report shall include only the name of the relative or guardian or conservator and the location of the property, whereupon responsibility of the person taking him into custody for such property shall terminate.

As used in this section, “responsible relative” includes the spouse, parent, adult child, or adult brother or sister of the person, except that it does not include the person who applied for the petition under this article.