I would not be surprised if the toxicology report comes back with some substances. From the very start, GR made allusions to Jen being on medications,.. not losing wieight the healthy way… etc. I think even with all his lies and twisted logic, there is some truth in his actual words if you dig, there seemed to be a method to his madness, possibly premeditation mixed with panic and being defensive reactively.
His story changed to fit his narrative several times; first, Jen ran away and he made up all kinds of excuses why and said don’t bother looking for her she is gone off on her own. I think he thought people would buy his story she took off and that would be the end of it. Then when enough scrutiny came onto that story and blood was found in the van, it changed to something bad happening to her and vowing vengence. He always seemed to be setting the stage to fit whatever story he thought would fly and deflect attention.
By throwing out all these things at the beginning, I think he was letting out information he thought would support his story. So with respect to toxicology, maybe he did poison her with something, then set the stage for blaming her once again. The guy definitely looks like he is on steriods, so he probably knows about all kinds of supplements and drugs and interactions. Who knows, maybe he was giving her some concoction telling her it would help her lose wieght, maybe he accidently gave her something that was fatal, or maybe on purpose, then panic set in. No matter what the scenario, I don’t think he had a plan for what ended up happening that day and did what he did in a rush, then fit multiple stories to explain it all away, and when one story fell through, he moved to the next one. So in some twisted way, I think the toxicolgy will be positive and he will once again use it to distort the reality.