I think a suspect that has something to do with the story could be the ginger guy that Snow ran into in the hallway. Why is he the cab driver and why did he get hit by the couch that fell when chasing Tweedle Dee and why was he there? And in the video of next time on The Wolf Among Us, Bigby says "serial killer" and Crane says that it is one of them. The ginger guy does work there so it could be him. Who do you think might be a big part of the story?