FBI investigated Richard Condon over The Manchurian Candidate - Spy Culture
Author and publicist Richard Condon is best remembered for writing The Manchurian Candidate - a biting futuristic satire in which a Medal of Honor winning soldier is brainwashed by the Soviets to try to assassinate the US president. The FBI files on Condon and his most famous book draw numerous connections between the JFK assassination and The Manchurian Candidate (particularly the film adaptation).