"JFK" director Oliver Stone tells Congress to reinvestigate 1963 assassination starting "at the scene of the crime"

Oscar-winning director Oliver Stone, whose 1991 film "JFK" portrayed President John F. Kennedy's assassination as the work of a shadowy government conspiracy, called Tuesday for a new congressional investigation of the killing during a hearing that aired conspiracy theories about it.

The freewheeling hearing of the House Task Force on the Declassification of Federal Secrets, where partisan grievances were aired, followed last month's release of thousands of pages of government documents related to the assassination. The task force's Republican chair opened the proceedings by questioning the Warren Commission investigation's conclusion that Lee Harvey Oswald acted alone in fatally shooting Kennedy as his motorcade finished a parade route in downtown Dallas on Nov. 22, 1963.

Scholars say the files that President Donald Trump ordered to be released showed nothing undercutting the conclusion that a lone gunman killed Kennedy, and the declassified versions did not appear to contain significant new revelations about the assassination, based on a review by CBS News. Many documents were previously released but contained newly removed redactions, including Social Security numbers, angering people whose personal information was disclosed.