Also I think KR shot Rosenbaum only once and the round went through his hand into his groin and then shattered his hip.
Plus I would like to add that skateboard dude shot himself when he grabbed the barrel of KR’s rifle and tried to yank it out of his hands - whereupon that force pulled the weapon forward against KR’s trigger finger. Then Bang!
Wasn’t there a head shot to the temple? In the video it looks like a huge hole in his head.