This discussion may contain spoilers!
While playing through the game a second time I had a thought cross my mind about who hired the Tweedles . The thing that confused me was how the Tweedles even knew about Faith being murdered considering the only people who knew outside of Bigby and Snow were Grimble, Crane and probably the murderer them self. The Tweedels started their "investigation" only about an hour or 2 (depending on how long it took for Bigby to find out that the girl was faith) after snow found the head. So it leads me to believe that it had to be one of them who asked for the Tweedles help. If Crane hired them it could explain why Bigby was holding Crane over the well in the preview for episode 2. I would really like to hear what you guys have to think about this.