I think one of the points I can’t piece in to the timeframe is the mental aspect of it.
As far as we are aware he has never killed anyone before! And I think even those of you with the extreme views on one side of the case doubt his intention that night was to murder from minute one, it was to find a girl to rape and has clearly escalated.
But thinking of it this way, if he’s took her to the park and raped her and killed her in the process, how long has he sat panicking? You’d think in the circumstances once she stopped breathing or showed signs of lifelessness he’d have had the moment of panic thinking “what have I done, how am I going to get out of this, what will I do with her”. But the timeframe would suggest he would have had to just instantly picked her up and got rid of her then ran back to the car.
This is why I think the only logical way the timeframe can work with sex, distance etc is if he got rid of the body on visit 3 or at a later date
Hope what I’m trying to say, makes sense!