The more I read his story, the less I believe it. I'm not saying it couldn't have happened that way, but it seems very unlikely to me.
Apparently, in SA law, you are only justified in taking a life in self-defence if there's really no other option available to you. If there's a chance of escape instead of confrontation and you don't take it & pursue in order to kill/wound then you are guilty of murder.
He had the chance to escape. He was standing by the bedroom door. OK it was locked, but could have been unlocked easily, but he could have quietly shaken Reeva awake and attempted to leave the room, gun trained on the bathroom.
Instead, he walks down a pitch black corridor and turns a blind corner with no idea of what's waiting there and fires straight into a closed door knowing that he'll almost certainly hit anyone in there because it's so small.
That's an incredibly foolhardy thing to do - and it's cold blooded murder, no matter who is on the other side of the door.
There was no effort to avoid confrontation - actually, he went looking for it. This is not what terrified, vulnerable feeling people tend to do.
Human life is precious and he deserves a lengthy prison term.