I don't know Marsh, there's only a couple people it could be. With J having confirmed Kary's ability to role block, I don't deny the plausibility of TownKaryJailer at all. I'm also fond of Chibo, and I think I am beginning to understand John. The only claims that leave me a bit iffy is Pierce and yourself. I've never played with you, and although I did like Pierce's interpretation of Day 1 events, there are a couple things that have been bugging me. Biting into Pierce's noob card is a little risky, and you're no sleazebag it seems. However, a good point was made that you were jailed when a kill went through, so something is definitely up in that regard.
Yourself and Pierce would be the two slots I'd go after after a J town flip, to cut to the long and short of it. Possible John Godfather scares me, but I don't understand John's play under these circumstances if he were scum.