The 33rd Field Investigations Squadron (FIS) is a specialized unit within the United States Air Force (USAF). Its primary function is to conduct investigations related to operational incidents, mishaps, and crimes within the USAF. This squadron operates under the Air Force Office of Special Investigations (AFOSI), which is responsible for law enforcement, counterintelligence, and special investigations in the U.S. Air Force. The 33rd FIS contributes significantly to maintaining the integrity, security, and efficiency of the USAF’s operations.