This discussion may contain spoilers!
Judging from the various amounts of posts on the Wolf Among Us, I became curious on the suspects each of you guys were extremely suspicious of and why. There's a list of Bigby's POIs (person of interest) below that I have seen in posts so far.
Twiddle Dee/Dum If one chose to go to Frog's apartment, and successfully extracted the truth from him, Frog tells Bigby of the threat that Twiddle brothers Dee and Dum made of killing his son. Also, Twiddle Dee was shown to be hiding in the closet of Lawrence's place after "asking about Faith's whereabouts."
Woody In the beginning of Wolf Among Us, Bigby Wolf is called by Mr. Frog to investigate a disturbance upstairs. He finds the Woodsman, or "Woody", hitting a prostitute that we find out later to be called "Faith". He has been shown to attack Bigby with an axe and would have a suspicious motive to have beheaded Faith and Snow with that very same axe.
Bluebeard Although not shown in the first episode of Wolf Among Us, Bluebeard's fairy tale has involved his infatuation of beheading his brides, until he is stopped by one girl, who discovers his secret, and gets her brothers to kill him. Judging from the Fables Wiki, Bluebeard has a sadistic streak of killing those that are harmless to him, and exercising his wealth and influence. Maybe he hasn't changed his ways after all....
Lawrence Once upon a time, we lived in a world where two young people fall in love, get married, and raise a family peacefully. This might not be the case for the Donkeyskin Fairy Tale couple, who have fallen on hard times, leading to what hinted at a nasty social dispute with Faith trying to raise money and help Lawrence out. A spat of jealousy could have easily fueled Lawrence's rage, murdering her in cold blood for sleeping with other men.
Snow White Although she is shown dead at the end of Episode 1, Snow's severed head may have been a ruse to throw suspicions off of herself. She may be hiding somewhere, waiting to emerge from the shadows for her next victim. MWUHAHAHAHAHAHAHAHAha.......coughs Excuse me.
Mysterious Man (EDIT: Twiddle Dee/Dum?) If one chose to go to investigate Mr. Frog's frantic call about someone riffling through Woody's possessions, Brigby sees a silhouette of a slender male figure in a top hat roaming around in there. Much isn't revealed about this guy, but he may have a hand in the serial killer's motives.
Ginger Dude Many of Wolf Among Us cutscenes show a redheaded male lurking around. Players typically first see him when Snow and Brigby almost bump into him in the apartments' hallway. He has been shown in the background of certain cutscenes, and a positive ID of the ginger's presence as the taxi driver for Wolf and Snow have been made by some players. A number of players have considered the fact that the ginger male may be a wolf himself, affirming the facts that there were scratch marks on Mr. Frog's windows and his ubiquitous (everywhere at once) presence wherever Brigby goes. Only time will tell whether the community was true.
So, what do you guys think? I'll try to add to this list when the next episode comes out, as a four letter word is going to hit the fan.
Bonus Joke Woody: Your arm's off!
Grendel: Oh, just a flesh wound.
Grendel: Don't hurt me, I'm "arm"less.