The location of the alleged suicide weapon is interesting to me.
Did he throw it up over his head after he shot himself
It's an interesting spot in that it doesn't really 'fit' with anything -- as you note, he'd have to throw it over his head [after the suicide shot] if it went directly to th floor, and as others have said the SWAT could have kicked it… except it's too close for an adrenaline-fueled kick.