So what did the witnesses tell lawmakers? Testimony from Stone and authors Jefferson Morley and James DiEugenio largely centered around criticism of the CIA and other federal officials in the decades since Kennedy's assassination.

Oliver Stone's "JFK" was nominated for eight Oscars and grossed more than $200 million but was also dogged by questions about its historical accuracy.

Filmmaker Oliver Stone called on Congress to reopen an investigation into the assassination of former President John F. Kennedy during a novel House hearing Tuesday, which featured witnesses who cast doubt on whether Lee Harvey Oswald was responsible.