Watch Confessions From the Grassy Knoll: The Shocking Truth for Free: How to Stream the Movie Online at 123Movies. . An investigation into the story of a man who confessed to firing the fatal shot that killed JFK 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.