Cal. Penal Code § 723

When a sheriff or other public officer authorized to execute process finds, or has reason to apprehend, that resistance will be made to the execution of the process, the officer may command as many able-bodied inhabitants of the officer’s county as he or she may think proper to assist in overcoming the resistance and, if necessary, in seizing, arresting, and confining the persons resisting, and their aiders and abettors.