Criminal investigation
Criminal investigation in the United States Armed Forces is carried out by separate agencies: The Naval Criminal Investigative Service (NCIS) (a civilian agency), the Air Force Office of Special Investigations (OSI), the Pentagon Force Protection Agency (PFPA), the Army Criminal Investigation Division (CID), the Coast Guard Investigative Service (CGIS), and the Marine Corps United States Marine Corps Criminal Investigation Division (USMCCID). The Defense Criminal Investigative Service (DCIS) is a civilian agency that answers directly to the DOD.