Air Force Office of Special Investigations

The primary investigative agency of the US Air Force, responsible for criminal investigations and counterintelligence. AFOSI agents routinely investigated UFO sightings, interviewed witnesses, and monitored civilian UFO researchers to protect classified aerospace projects and assess security threats. They were heavily involved in debunking hoaxes and securing classified military sites from public scrutiny.

Served as the Air Force's primary field investigators for UFO incidents and counterintelligence matters related to the phenomenon.