In the Judges summing up, he told the jury that there was no third party involvement in these shootings, that they had to choose between it being Sheila, or Jeremy who had been responsible - this was a misdirection of ineptitude, since he took away the juries mind to find that someone else had been, or was responsible for the shooting of victims, not Sheila, and not Jeremy! I think the trial judge overstepped the mark by interfering with the due process of the jury in reaching its verdict, by limiting the jury into deciding the outcome of the case by having to choose one or the other alternative?
For example, the police shot Sheila who died on the main bedroom floor almost two hours after the firearms team first entered the farmhouse!
Additionally, there was the possibility that the culprit (either solely, or having acted as an accomplice to Sheila in disposing of the other four victims) fleeing the country on the first morning of the tragedy, leaving his camper truck parked up at the scene! That person was 'Ralph Neville' who had come to this country to take a break from shooting incidents in his native country (South Africa)...