I think the prosecutor and the "victim" should be sued for slander along with other damages.
There should also be criminal charges against both.
Civil suits were filed against the "victim" and her attorneys in the Tawana Brawley case, and I believe they did obtain judgments (although I think that in practice, they were unenforceable). IIRC, Fat Al Sharpton managed to get out of his by declaring bankruptcy or some such thing.
As for state prosecutors, I don't know if they can be sued or charged for such misconduct.