To me he seems to be hanging back, waiting for everone to destro themselves within before he jumps up and takes the game from right out of under our noses.
Basically because I see him as a silent threat, and because before we got assigned our roles, I figured that if I were the mobster that is the strategy I would use, stay back untill we have a decent amount of people out, then become more influential in the game. Perhaps whoever is the mobster is doing to opposite. Who knows, but I think it Coler