She held a French passport. Any sane person wanted by the US for major crimes who held a French passport would go to France. No extradition. This leaves 3 options:
1) She severely miscalculated and was discovered to be hiding in the US.
2) She voluntarily turned herself in under a deal.
(Or, my favorite)
3) She was removed from foreign territory by operators via EXTRAORDINARY RENDITION.
I hope it was the 3rd one and it was painful AF.