California Code, Penal Code - PEN § 916.2

(a) Notwithstanding any other provision of law, a grand juror who is a current employee of, or a former or retired employee last employed within the prior three years by, an agency within the investigative jurisdiction of the civil grand jury shall inform the foreperson and court of that fact and shall recuse himself or herself from participating in any grand jury civil investigation of that agency, including any discussion or vote concerning a civil investigation of that agency.

(b) This section shall be in addition to any local policies or rules regarding conflict of interest for grand jurors.

(c) For purposes of this section, “agency” means a department or operational part of a government entity, such as a city, county, city and county, school district, or other local government body.