I really wish they would have showed pictures. I have to believe there was safety standards as far as covering giant holes in the ground this wasn’t thaaat long ago before osha and all that. Also correct me if I’m wrong they weren’t adding a new addition it was just turning whatever was there into some grocery store right ? There may have been small trenches to extend plumbing or whatever but I can’t imagine huge holes being exposed. Too much liability. I’m not set in stone with any theory. I wish we would find out that he bolted for the beach and has been living as a beach bum or something.
In absence of any evidence that Brian left the club that night, or any signs of foul play, then yes I believe the logical explanation is a drunken accident in the construction area. There's been all manner of wild theories about Brian's fate, but in my opinion, none of them hold water. I've said it before, the accidental death theory is unpopular because it's a literal dead-end. It was just an unfortunate mishap by an intoxicated customer. There's nothing juicy for sleuths to get their teeth into.