Firstly, OP had five days to produce his statement, which he did so with the help of his legal team who had observed the scene in detail. This is why the statement fits the facts so neatly, but yet there are gaping holes in its logic which he could not have foreseen (i.e. that there was no space on the adaptor for two fans to be plugged in, that he could not have moved the fan to the position he stated without unplugging it, that he cannot explain the duvet on the floor - and this is only so far!)
Secondly, at the time that the scene was photographed, the police had no idea of Oscar's statement. The defense will do their best to make a huge fuss about the fact that things were moved... inevitably they had to be moved during the course of the investigation and photography, but as Gerrie Nel pointed out yesterday, you cannot assume that there was a huge conspiracy to frame OP when he had not even made his statement. And for a policeman to have moved both fans, taken the duvet off the bed, opened the door and curtains to a different position, all before taking a single photo, begs the huge question "why"?
In making her decision I believe the judge will most definitely take into account the fact that OP is prepared to blatantly lie under oath and has been caught out doing this and still refused to alter his story or his plea. (the finger on the trigger of the Glock, which he insists did not happen).