If you look at the vantage point from the position Files claimed he was in, the "window" for a shot to strike JFK is minimal. Files would allegedly have to of fired around the 3 guys standing on the steps, in addition to the Black Dog Man standing inside the Wall Nook. Further down the picket fence toward the Triple Underpass would have been a better position. Holland and others standing atop the Triple Underpass claimed they sighted smoke coming from this picket fence location.