Good points,
Why act so mysterious about it and worse, put your life at risk? Unless Brian was so drunk that he did not have a sense of proper judgment and thinking. I think we mostly agree that he died that night. The disagreement is if he died, how he died? Where is his body? And if it wasn't foul play, why did he do it? And do so to avoid detection for twelve years?
Do you think anybody knows what happened and is not talking? Or do you think that this is a true mystery for all? Do you think Brian Shaffer will ever be found? Alive or remains?
Satch
IMO if he did die that night it wasn't anywhere in that building. Det Hurst said they searched that building from top to bottom. Those were his exact words. Searching that building would have required the help of a lot of people including people who worked there and knew the place very well. They also used dogs. The only time they got a hit was once when he said the dogs led them out a side door and towards a Wendy's. He did say that it wasn't 100% sure if the scent was Brian's. The cadaver dogs from what I remember got no hits.