He is shooting at a wall, look at the kill and he got two kills, the SS sowed that the user who posted this and GUIM was not near any one.
Tbh i believe him, i just don't think in the future ss are going to be relevant. Fraps and other recording software is going to make ss obsolete. It just provided physical evidence, nothing you can make a true theory with. If you actually see him shooting at the wall, in a video... then?