I can buy your theory save for the q I had earlier.
I am pretty sure he is guilty based on *67 and 3rd call.
I do not think she was burned in burn pit as fire was not hot enough plus other small things.
I do think police planted evidence to frame him ( knowing him guilty). Key bullet maybe blood. The dna on car was accident.
The police had more motive them him,and yes there are bad police - even ones that are only bad in 1 case. The two main dudes may be great officers but in this ummm no.
The da should've never said shots fired in garage. Could not have happened if she was still alive.
Dassey probably knows the truth. I do not believe he raped killed or burned her but he knows what really happened that day in regards to his uncle.
I feel bad for any and all people that knew Halbach. Thus is a tragedy and a young lady was killed. This is very sad and I would be devestated if this was my family member.