Am I wrong or does it look like the first shot may have come by the guy who eventually takes his shirt off while giving aid? He appears to be chasing after the Pink shirt guy and has his arms up in a shooting position as he runs up onto the scene. the first shot, has always troubled me. I can't figure who took it. If it is the same guy who takes off his shirt, then this was the guy from an hour earlier that his friends were trying to get to calm down as he was very agitated.