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USAF OSI History 1948-1950

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This is a history of the USAF Office of Special Investigations covering 19 July 1948 to 30 June 1950, prepared for the Inspector General on 22 November 1950 and released with redactions by AFOSI under FOIA in December 2010. It describes how OSI was set up under Brigadier General Joseph F. Carroll to bring the Air Force's criminal, counterintelligence and procurement fraud investigations under one command. It also covers the 25 district offices, the headquarters divisions and the investigative procedures. The text does not discuss UFOs.

  • p. 17 …P•:nomel on cmt," with t.he Di:rect.en.te are aatd.gned to Headquarters…
  • p. 18 …29 Headquarters USAF dated lS Jul7 1948 'JI AFO!P unniabered letter lieadqua:rters USAF 321…
  • p. 20 …have been assigned to Hea.dquart.ere and Headquarters Squadl'on USAF . J . The Office ot…
  • p. 22 …The aTe:rage district headquarters has been statt'ed by key personnel who,, under the direct…
  • p. 23 …Through OSI Headquarters the twenty-five (25) district o.f.tlces have been drawn toget.her…
  • p. 27 …All investigative work pertonaed withie a particular district office area, has tlowd through the district headquarters…
  • p. 33 …qui'red compa mantaliz�tion in the Headquarters, USAF. The fluid nature ot iDVest.::tgative activities…
  • p. 36 …r,erf'onned 11ntil such time as Headquarters OfiI was advised and inst rud,ions 'I…
  • p. 73 …The Office of Special Investigations, Headquarters USAF, exercises operational control over all Air Force investigative activities…
  • p. 74 …b, District Headquarters. The 25 OSI district headquarters and the area jurisdiction of ea.ch are…
  • p. 75 …12 • Headquarters at Seo� .Air �-!'.�E;\)3ase, Bellevill�J Illinoh; (mailing aggress : Scott Air Force Base…
  • p. 76 …19 - Headquarters at Fairfield-Suisun Air Force Base, Fairfield, California. Territorial area consisting of the following…
Description of document: US Air Force (USAF) Air Force Office of Special
Investigations (AFOSI) History, OSI,
19 July 1948 - 30 June 1950, 2010
Requested date: 21-September-2010
Release date: 17-December-2010
Posted date: 12-January-2026
Source of document: HQ OSI/FSS/MSII
Attn: FOIA Section
27130 Telegraph Road
Quantico VA 22134
Fax: (571) 305-8229
Email: afosi_hq_foia_request@us.af.mil
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