I would have to go with the testimony one, because if the body was burned beyond recognition, and since DNA testing takes longer than 2 days, the seats in the truck were missing, an autopsy of that magnitude would take longer than 2 days, it has to have been eye witness testimony. I just don't get how it could be any other way. The police came out so quickly with that statement that he was killed that night I just didn't understand how they could know that fact so soon.
I am wondering if we sleuths should be looking at what they aren't saying rather than what they are, to help solve this mystery.