Nick, you may want to consolidate, but with the reduction of characters in season 3 the suspect list changes (assuming this mystery is a major part of the story and the character(s) are still alive.

Rat
Assassin
Thief

Michael *** / *** / *****
Pegs Thief / Rat / Assassin
Riley *** / Rat / Assassin
Kelly Thief / Rat / Assassin
Saul *** / Rat / ******
Lizzy Thief / Rat / ******

Burt **** / Rat / *******
Angel **** / Rat / ******