It seems like TH was completely unaware of the surveillance cameras (else he wouldn't have claimed he was fishing or job hunting, which would be contradicted). So, choosing to use a different car must have been a natural choice, rather than something he contrived. If TH wasn't aware of the cameras, he wouldn't bother to avoid using his own car. That argues to me that someone else was a full partner in this crime. Maybe TH even stayed home while perp #2 drove away with the body.
I guess a second possibility is that he called on someone who cared enough about him to bail him out of *any* kind of trouble and that person was willing to dump the body for him.
I guess a second possibility is that he called on someone who cared enough about him to bail him out of *any* kind of trouble and that person was willing to dump the body for him.