Most witnesses at the time stated the shots came from the direction of the sixth floor school book depository. Two of Oswald’s coworkers on the fifth floor heard the sound of a bolt action rifle being worked above them, and spent shells hitting the floor. Another witness saw the rifle barrel extending from the sniper’s nest.
Two-thirds of the witnesses outside the depository thought shots came from the Grassy Knoll. They were running up the hill to it. Almost all their testimony was disregarded since there was only one reason for the WC - to fix blame on Oswald. This was its standard operation as regards evidence.