Joseph Carroll (DIA)
When the U.S. Air Force was established as a separate executive department under the National Security Act of 1947, Secretary of the Air Force W. Stuart Symington, requested FBI Director J. Edgar Hoover to loan General Carroll to the services to organize a U.S. Air Force agency for investigative and counterintelligence functions. He organized and directed this new organization, the AFOSI, along the lines of the FBI rather than the U.S. Army's Criminal Investigation Command (USACIDC or CID). General Carroll was tendered a commission as a colonel, U.S. Air Force Reserve, January 12, 1948. He was ordered to active duty in the grade of brigadier general May 6, 1948, and promoted to major general August 11, 1950.
History of the United States Air Force
Over the continuing objections of the Navy, which feared losing its air arm and strategic role to the new service, the United States Department of the Air Force was created by the National Security Act of 1947. That act became effective 18 September 1947 when the first secretary of the Air Force, Stuart Symington, took office. In 1948, the service chiefs agreed on usage of air assets under the Key West Agreement.