The Grassy Knoll: FBI Agents re-examine the JFK Assassination presents an investigation into the story of a man who confessed to firing the fatal shot from the Grassy Knoll in Dealey Plaza; Dallas, Texas on November 22, 1963. His story becomes one more compelling piece of evidence for what most Americans have long suspected: that their government covered up critical facts about the CIA's collaboration with Organized Crime to assassinate the President of the United States..