I'm not talking about what went through the system I'm talking about what I actually think happened based on the evidence.
I think his girlfriend is tossed in jail and he's bitter and angry. He's mad the photographer won't come see him knowing it's him. He gets out of control and sexually assaults her and then he realizes that it could mess up his law suit if she goes to the cops.
So he kills her. He thinks he's in the clear because OF the lawsuit and that they won't come on his property. So he hides the car and burns the body and the camera and the phone.
The third phone call was sent for some reason without hiding his phone number. His way of putting an alibi up. (Dumb)
But like I said, his demeanor is interesting to watch. When they talk about some things he gets very upset and you can tell he KNOWS that they planted the evidence, not that he thinks they did. He knows they did because he knows what really happened because he did it.
IMO YMMV
The problem is there's no evidence at all that there was a sexual assault other than what Dassey says. Jodi spoke to Avery twice that day, says he was completely fine. He didn't seem angry or bitter about her arrest. No one else describes him that way in the days leading up to Halloween.
"The photographer wouldn't come see him" makes no sense - she DID go see him. lol She knew exactly where she was going, she'd been there several times before. Bobby Dassey says he saw her, alive, on Avery's front porch.
It much simpler if he just snaps, reason unknown, and kills her somewhere outside (now we can understand why there's no blood in the trailer or garage). Throws her body in the back of the RAV4 (now that blood is accounted for), drives her to the burn barrel and throws her and all her possessions in it and lights it up (now the remains found there and her belongings are accounted for). He parks the vehicle and throws a couple things on it intending to deal with it later. Disconnects the battery to be sure the alarm doesn't go off (DNA on the hood latch accounted for).
He realizes the burn is not going to be fast enough or complete enough what with peeps coming home and coming over. Plus it smells. He moves what remains to the burn pit and covers most of her up with debris already there. Asks Dassey for help gathering stuff to pile on a "bomb fire".
Viola. The only evidence outstanding is the ones that are most questionable (his blood in the SUV, the bullet fragment in the garage), the pelvic bones in the quarry (which no scenario including the one presented at trial really can make sense of - it was never ID'd as being Halbach's, just burned and female and it was a half mile away), and no need to wonder how he Dextered the house and garage.
That's how it COULD have happened, dunno if that's it but it makes much better sense than the story presented at the trial. Might not have been enough to convict. Problem comes I think when they decided they'd enhance their case to make sure and then badgered a poor learning disabled 16yo into saying a bunch of crap to account for it.