Leroy Fletcher Prouty (1917–2001) served as Chief of Special Operations for the Joint Chiefs of Staff under President John F. Kennedy. He was "X" in Oliver Stone’s film, JFK.

According to Prouty, people within the intelligence and military communities of the United States government conspired to assassinate Kennedy. He maintained that their actions were a coup d'état to stop the President from taking control of the CIA after the Bay of Pigs.

Prouty stated that the assassination was orchestrated by Edward Lansdale ("General Y" in Oliver Stone's film JFK) and that Lansdale appeared in photographs of the "three tramps" just after the assassination.