Yep, Faith gets released after a inmate attacks her with a familiar looking knife(like the ones the Harbingers use). Faith pretty much wipes the floor with the inmate, then is released.
How Faith gets out exactly is something I'm not too exact on. I've heard some reports that she gets broken out by that girl Gwen, others that she gets released.
Either way, it makes sense she would look Angel up first.
CAN'T WAIT FOR MY GIRL FAITH!!!
We don't know which murders she confessed to. If she only confessed to the Mayor's aide, then she wouldn't likely get slammed too badly, since it could be proven it was an accident, which would be Man 2, which is about 3-8. Plus she was underage I think, so that could affect things.