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
In practice, the Army Air Forces became virtually independent of the Army during World War II, but its leaders wanted formal independence. In November 1945, General Dwight D. Eisenhower became Army Chief of Staff, while General Carl Spaatz began to assume the duties of Commanding General, Army Air Forces, in anticipation of General Arnold's announced retirement. One of General Eisenhower's first actions was to appoint a board of officers, headed by Lieutenant General William H. Simpson, to prepare a definitive plan for the reorganization of the Army and the Air Force that could be effected without enabling legislation and would provide for the separation of the Air Force from the Army. On 29 January 1946 "Generals Eisenhower and Spaatz agreed on an Air Force organization composed of Strategic Air Command, Air Defense Command, Tactical Air Command, Air Transport Command, Air Technical Service Command, Air Training Command, the Air University, and the Air Force Center."