who shot kennedy from the grassy knoll
They also placed the unknown gunman behind a picket fence at the top of the grassy knoll, in front of and to the right of the presidential limousine. The House committee concluded that this shot missed, and that Kennedy was killed by a final bullet from Oswald's rifle. Thomas, by contrast, believes it was the shot from the knoll, seven-tenths of a second earlier, that killed the president.