Newbie here so apologies in advance for any mistake. I joined because of this case. I’ve been reading this thread for months but I might have missed pages, so sorry if I’m covering something already said.
My speculation only:
My mind keeps coming back to the motorbike. I know SAPOL took a few vehicles to test, but the motorbike stands out to me. In general, nobody would use a motorbike to move an alleged body, would they? It would be hard, slower, and far more visible than having someone stowed away in a car or truck. So…..maybe a motorbike was used because there was no other option: ie the ute was elsewhere.
Theory: (speculation, MOO) - If Jess had gone out that morning with Josie, them both taking the motorbike along in the ute (or maybe one of them riding it) so they’d have more flexibility, using the ute as a base while each doing a different task, but then something happens late afternoon, Shannon contacts them by walkie talkie, and Josie races back to the homestead on the motorbike. Josie discovers a dreadful scene and needs to think fast. Evidence must be removed - for concealment reasons, for their own sanity, and because Jess will be back in the ute soon. There’s limited time so Josie takes the ‘evidence’ a few miles away by motorbike, planning to go back to hide it more carefully later. Jess returns to be told that Gus has wandered off. Josie goes out to search on the motorbike, and while out hides the ‘evidence’ more thoroughly, maybe even on a nearby homestead. This would explain the delay in calling the police (to allow time to conceal the ‘evidence’, while reassuring Jess that Josie was busy driving around looking for Gus and would surely be back soon with him.)
The time discrepancies could be related to that alleged latter period when Josie allegedly goes out again to properly conceal the ‘evidence’. She might have said she was gone 20 minutes, driving a rough circle a mile or two out from the homestead but Jess said Josie was gone an hour.
And perhaps while two people might know of the ‘incident’, only one knows where the ‘evidence’ has been hidden, making it harder for the police to know where it might be if that person isn’t going to crack and tell them.