Almost forty years after John F. Kennedy's assassination, an ex-Marine named Walter Ohlinger has come forward with a startling claim. "I was in Dallas November 22, 1963. Does that mean anything to you? I've never told anyone this before: no one knows I was the second gunman behind the stockade fence on what they called the grassy knoll. I fired one shot from there." Shedding new light on the most well-know murder mystery of the 20th century, this masterful thriller will keep you guessing right up to the last frame.