As far as I know there hasn't been a word on who exactly Faith's employer is. Finding that out really wasn't a major mystery or anything, as I'll explain. You might want to add him to your "possible suspects" lists.
When Bigby exits Snow's office you get the chance to choose between either going to Lawrence's first or to Toads. If you choose to go to Lawrence's first you'll be there in time to save the guy; therefore you'll have a chance to talk to him for a short period. Lawrence will mention "Georgie" if you choose to tell him Faith has been killed (although I'm not sure if the same would happen if Snow tells him).
Either way the tweedle arrives and cuts the conversation short but that's all we need right now.
In December Telltale posted the update to episode 2 stating "We also have a peek at the seedy underground club exclusively for Fables, known as the 'Pudding & Pie."
Pudding & Pie, you say?
There's a nursery rhyme that goes like this:
"Georgie Porgie, Puddin' and Pie,
Kissed the girls and made them cry,
When the boys came out to play
Georgie Porgie ran away."
"Georgie" mentioned by Lawrence and Pudding & Pie in the update- BAM you have Faith's employer.
Why Faith kept saying 'These lips are sealed' when Bigby asked who her employer is is another thing, but that just makes him one of the new suspects which is linked to the murder case.
Definitely we'll find it out on the next episode, but I guess Telltale made it too easy to figure that out.
What do you think?