We don't have the resources to free all of them. We'd get caught or eventually get one of them in trouble, and if that happened, the guards might suspect the captives of being responsible for it. I'm sorry.

[It tumbles out as she steps away from the pair; Prue's thought of it already, and the thought of getting the inmates in trouble with the guards is offputting enough on its own.

She turns her attention to the girl, getting a good look at the person they went through this trouble for.]

So, you're Snow?