My top suspects right now would be
JM - Seemed either very confused, which I can understand a bit, or slipped coming out the gate after Night. My vote stands here for now but I just don't really know what she is thinking.
NJ - Too many excuses, weird posts that don't seem to fit the conversation. Also very confrontational and defensive.
HN - I'm still not sold on this but the behavior is not like anything I have seen from him before.
Actually I revoke my vote for JM. I need to reread everything since night before I can choose.