I'm not prepared to vote for anybody given the current state of things. I can't really compare j0 to himself in past games, and the only thing somewhat odd happening in this game is DGC forming a suspicion list to finger just about everybody but himself.
Of course, WoW's recent actions make it seem like he could be the arsonist, but the initial shock and disdain WoW showed to the idea of there being two night kills makes me believe that isn't the case.