Cal. Gov. Code § 27492

The coroner shall summon, or cause to be summoned by any sheriff or policeman, not less than nine nor more than 15 persons, qualified by law to serve as jurors, to appear before him forthwith, either at the place where the body of the deceased is or at some other convenient place within the county designated by him, or at the request of the district attorney, to inquire into the cause of the death.