A professional who guards grand jury room and district attorney's offices to provide security. Respnsibilities include:

• Searches premises to ensure security of rooms.
• Questions individuals entering area to determine purpose of business and directs or reroutes individuals to destinations.
• Arrests persons violating law, and summons patrol unit to take custody.
• Notifies sheriff's patrol units of need for assistance or medical aid.
• Requests prisoner's arrest records be sent by criminal identification unit to district attorney.
• Prepares and validates receipts to reimburse witnesses for travel expenses.
• Occasionally transports prisoners between jail, district attorney's office, and penitentiary for questioning, trial, or incarceration.