During the "de facto" presidency of Juan Carlos Onganía in 1966, the building was repurposed as the officers' mess of the 7th Air Brigade of Morón, thus beginning the military's presence in the area. After the coup of 1976, from 1977 to 1978, the site functioned as a clandestine detention center under the jurisdiction of the Air Force, with assistance from the Buenos Aires Police of Castelar. In the jargon of the repressors it was known as "Atila" or "La Mansión".