Perhaps all those who think OP is "innocent" of knowing it was Reeva would consider the following:
Reeva's bladder was just about empty when she died.
By his own statement, OP spoke to her just before getting up and moving the fans.
He then heard a noise - the window opening. (heard despite the fans).
Grabbed his gun - no time to think - whispered to Reeva, then hurtled down passage screaming, then stopped screaming, heard toilet door slamming, slowed down and went into bathroom quietly.
Heard a noise he perceived as somebody coming out of the toilet and plugged the door with four shots.
So at what time did she actually have a chance to pee?
If the door opened outwards, she could not have reached it to pull it shut if she'd been sitting down on the toilet.
She would not have had time to pee beforehand, and if she had done and had time to flush, he would have heard the flush and/or the cistern refilling.
If she had peed, then stood up and pulled up her shorts, but not flushed, there would have been evidence in the toilet (toilet paper).
But if he heard the window sliding open (which presumably was Reeva in his version), there would not have been time for her to pee AT ALL.
So, if her bladder was empty, why would she have got up in the night and gone to the toilet at all?
Just looking logically at all the above, it makes complete sense that his version is a total and utter fabrication.