I would be surprised if anyone entered into a plea deal with Mr S. The term for conviction is 30 years, no ifs or buts about it, AU does not have 'degrees ' of murder, ,it's murder or manslaughter, and he's been charged with and will go to trial for murder.Best guess
They have some sort of smoking gun that we’ll find out at august 8
If he gives up the body location, it’ll be left to the last minute, get some sort of plea deal & avoid trial.
He has already put himself in a position where he would be unlikely to have any mitigating circumstances found that would lower any sentence. He has not co operated, shown no remorse, remains recalcitrant, and the cruelty to the family of his victim is extreme. Uncivilised and extreme.
If he gives up the location of the body NOW, he still has not met any of the criteria for any deal.
Also, he would not be able to avoid trial, in one sense , even if he pleads guilty, he still has to sit and listen while the judge outlines his crime, and his previous crimes that may relate to this murder, and then all the reasons the judge has arrived at the sentence, and then the sentence is announced. Life, and how many years he must serve before he is able to apply for parole, which does not mean he gets parole. Only , that he can apply and hope.