What about Ed Hoffman?
On 22nd November, 1963, Hoffman stood on the shoulder of the Stemmons Expressway in Dallas when John F. Kennedy was assassinated. The deaf-and-dumb witness claimed he saw a man with a rifle moments after the shots were fired. He later described how a man wearing a dark suit and tie, with an overcoat, ran west along the wooden fence with a rifle and tossed it to a second man who was dressed like a railroad worker. The second man then disassembled the rifle and put it in a soft brown bag.