So, I've been goofing off in this forum, looking at the investigations. I saw a comment saying that the killer would probably be someone we really didn't expect, perhaps a character we don't even know. So I thought to myself: "Who would be to me the most unexpected killer?". Actually, I thought of Bigby. He coulda've killed Faith in his Wolf form, but after Snow drove off in the cab, Bigby went in Trip Trap catched Woodsman/Dee, and headed straight to the Business Office, when he found Snow dead.
So. What's your mind on the killer. What TTG does is unexpected, and the only thing we can do is guess while TTG puts their hands on the next game.