There is evidence of a shooter located behind the picket fence; at least 57 witnesses recalled hearing a shot from that direction. When witness Sam Holland (viewing the motorcade from on top of the railroad bridge) went behind the picket fence with several of the railroad workers he supervises following the assassination, they discovered fresh footprints in the mud behind the fence. Holland demonstrated where the prints were discovered during the filming of Mark Lane’s documentary, Rush to Judgement. Holland and several of his workers, such as Thomas Murphy, Richard Dodd, Austin Miller, Walter Winborn, and James Simmons, reported seeing a puff of smoke from the grassy knoll area. Other witnesses such as journalism student Cheryl McKinnon, reporter Ed Johnson, Policeman Earle V. Browne, and Dallas deputy Sheriff W.W Mabra, also observed a puff of smoke from the Grassy knoll area. Both the Zapruder film and the Wiegman film, also show what appears to be smoke from the Grassy knoll area. Furthermore, the Nix film (filmed by Orville Nix), shows what appears to be a man with dark hair peak his head over the picket fence immediately following the head shot - just as the President’s limousine begins to speed away from Dealey Plaza. You can see in the above frame of the Nix film which shows the “man’s” head and hair inside the red circle. Also, two days before the assassination, two police officers observed men with rifles, taking aim over the picket fence.