I'm guessing that she copped a plea to come clean in return for immunity and anonymity. Otherwise, Banks would still be sitting in the slam. The cost of five prime earning years lost could easily exceed a Powerball jackpot.
The accuser contacted him via Facebook after he got out of prison. He arranged to meet her and recorded their conversation which is what led to his exoneration.
She sued the school district because the fake crime was on school grounds. She long ago blew through the 1.5 million dollar settlement, has never married and has two kids. The citizens of the area are very interested in getting their money back, but alas, it's gone. I don't know if anyone is looking to file charges against her.