I don't think she will recant until she is actually confronted with the reality of having to testify. Mangum and her ilk live in the moment and don't concern themselves with tomorrow until tomorrow becomes today, when it's usually too late to change course. Great pressure will be brought upon her to testify, and she will run away if she has custody of her kids, and succumb to the pressure if she doesn't. There is no entity with a political interest or any other kind of interest in seeing the case be dropped that has access to her. I think Liefong is holding her captive legally by having the children's services take her kids away from her and she has to go through Liefong to see them. That is his hammer over her, and she is the kind of person who is easily controlled by such manipulations. Pimps exercise psychological control over their "stable" this way, and in this sense Liefong has replaced her pimp with himself.
"I think Liefong is holding her captive legally by having the children's services take her kids away from her and she has to go through Liefong to see them."
I doubt she cares as much about the children as she does the child support check.