Contrary to the belief that Lee Harvey Oswald was the lone assassin in Dealey Plaza at the time that President John F. Kennedy was shot, this account maintains that a gunman located on the grassy knoll delivered the final, fatal shot. Based on interviews with James E. Files, the alleged gunman, the chronicle proposes that the assassination was initiated by the CIA in collaboration with organized crime—Sam Giancana, Charles Nicoletti, and Johnny Roselli, in particular. Subsequent discoveries made through the assistance of a number of retired FBI agents also implicate two anti-Castro terrorists protected by prosecution from the Bush administration—Orlando Bosch and Luis Posada Carriles.