Rumpole
Formerly known as "Hercule Poirot"
So you believe OP had already killed her in the first bangs and then he screamed like crazy that sounded to five independent witnesses, from four? differently locations, like a woman screaming for her life, all before he'd been able to break into the toilet room to see what he'd done? Ok.....
Good point.. it was before he saw her.
However, I still believe that he did the screaming that sounded like a woman. It certainly was not Reeva, since the evidence proves that the sounds of screaming were after she was dead (ish)... heart beating but brains blown out.