Seems to me there's a simple choice...either Dr Stipp is a barefaced liar, willing to risk his career and reputation in order to get a man he doesn't know convicted of murder (as Roux suggested) or Johnson's notes/phone were wrong.
We know that nobody - neither the State nor the defence - checked the central time server of Johnson's provider, or consulted actual records. They simply took his word for the time. This is proved during Johnson's questioning. His notes/phone only needed to be a minute out and the whole thing falls into place.
Gunshots at 3.14/15...Stipp calls security at 3.15, Mr Mike at 3.16, Johnson faffs and calls wrong security at this time, then the Van der Merwe's. Everyone who heard anything after these shots reports a male crying. Everyone who heard anything before them heard two voices and a female screaming.
The prosecution dropped the ball here...they should have either gone to get the actual provider records for Johnson's call or highlighted to the court that they didn't have them and therefore were relying on unsubstantiated information. Nel should also not have referred to the 3.17 shots when what he really meant was the 3.17-wrong-clock shots...which would not actually have been 3.17 as the clock was fast.
I agree with everything you wrote here - i think this is exactly what happened.
It also fits Mrs Stipp looking at the clock - a time Masipa has to change by 10mins for no apparent reason :clap:
However I will offer some defence of Nel here.
First there are obvious errors in the police investigation - clearly they just weren't up to a case where technical (i.e. iPhone) aspects were going to be super critical. Also we don't know what records the state tried to get - or whether there are some exhibits not referred to.
Second - I felt Nel had completely demolished the highly improbable version OP offered. It would not have been obvious (except with hindsight) that he needed to demolish the obvious lies even more. He made this point in his closing. The witnesses heard a woman screaming, and she was found dead at the accused's hand. What more does a judge want? I think extra phone records would have made no different to this judge who was prepared to overlook even more glaring problems - like the screams, the damage in the bathroom, the fight, the stomach contents etc,... because call times?
I tend to agree with you about Johnson.
I think if there was an exhibit - then Roux would have mentioned it during X.
So then it turned out to be a blunder to refer to "3.17" shots - which i think Nel meant much more loosely.
However all of this only comes into play because the judge decides to ignore large amounts of circumstantial evidence which makes OP's story highly improbable in order to seize on some peripheral points.
I mean what is more important?
That it was 3.15 or 3.17?
Or that the unchallenged evidence of several witnesses was that they heard a woman screaming?
It involves adopting a highly artificial view of the facts for Rouxs version to make any sense.