With regard to the blog link, it just shows how easy it is to make so few things seem like so many.
Here it is without the fudge...
OP got up, brought the fans in, covered a blue light, heard a noise, didn't see that Reeva had left the room, got his gun and went to the bathroom.
You can mention turning around at five different angles, feeling around the bedroom, not seeing this, not seeing that etc. etc. At the end of the day it's over-elaborating a few actions to make them appear inconceivable.
I've been in a room in daylight and somebody's left the room without me even knowing it. I bet we all have. Maybe it was something I said tho?
Either OP should have checked to see if Reeva was in the bed and didn't, or it's all a complete lie and he stalked after Reeva because he wanted to kill her.
Whichever you choose to believe I can't see how it was elaborate. An intruder killing isn't elaborate, and a spur of the moment rage killing certainly isn't.