Which leaves the puzzle: if he murdered her in a fit of rage, what trace of that did he leave? I always get booed from the stage whenever I mention Columbo but I am sure the peerless detective would have fastened on some detail missed by the cops that sows up the whole thing. For want of a better idea, I go back to the missing pee. If everything was OK and she just went for a leak, since her bladder was found to be empty, she must have peed. If she did, the pee was in the pan and if it was not there she must have flushed and if she flushed he would have heard it.
She took her phone, as a torch the judge thought, and went into the cubicle, where the light didn't work and locked the door. What evidence was there about her usual habits in that regard? I almost never lock the bathroom door and see no reason to when with my partner, nor she either and if we split and she got in a relationship with someone else and I heard she locked the bathroom door I would think it strange. Reeva did not remove her shorts, so either she had just got there and not had time to use the WC (in which case there should have been pee in her bladder) or she had already finished and had dressed again (in which case she would have flushed).
This may not be the best point, but there must be something (if he's guilty). It sure is interesting from the pro-innocence side that nobody clearly and unambiguously heard what must have been a flaming row between them before the shots were fired. Surely, if you are so far gone as to blaze away at your girlfriend, there should be a lot of preliminary screaming and shouting on both sides.