Was an empty shell casing that would have been ejected out into the street or into the crowd on the sidewalk from the Secret Service Agent’s AR-15 upon him firing it, either on purpose or accident, ever been produced?
Using the audio evidence, there is no reason to believe that the AR15 was fired. All of the wounds to all three men are explained by the five shots that were identified.
the acoustical evidence indicates where four of the shots were fired from. The fifth shot was fired from a location that can be determined using other evidence. The audio evidence tells us when that shot was fired but it can’t determine WHERE unless there is test data firings from that location.