The chances of her ever being extradited to Italy are less than my chances of being president of the United States. It will NEVER happen.
No matter what the prosecution tries to do with her former boyfriend Raffaele Sollecito to implicate her in some kind of plea deal of whatever the corrupt Italian system has in order for the corrupt prosecutor to cover his worthless ass, Amanda Knox will remain in the United States. The American people won't stand for an extradition.
Years ago the authorities got the killer of Meredith Kercher, Rudy Guede. Nobody else was involved.
The Knox case was slut-shaming at its worse. A flimsier case can hardly be imagined.