Just had a thought when posting a previous theory -- Bertram, McAllister and SMITH were all standing together when Jane made them get up against the wall.

So, how did McAllister die if Smith and Bertram didn't? McAllister has to be alive!  OH my I wonder if that means he's RJ?

Not what I wanted to see, but he was there from the beginning.

The name THOMAS has repeated throughout the show with different characters.  It means TWIN

Bertram used the name THOMAS when opening his storage/safe place.