(NBC) - Despite an order from Italy's top court to re-try Seattle college student Amanda Knox, she might never make it back into a court room.
Legal experts told NBC News that the U.S. has refused to extradite citizens to Italy in the past on similar grounds.
She and ex-boyfriend Raffaele Sollecito are facing trial again for the 2007 murder of Amanda's roommate, Meredith Kercher. Within three months, the Supreme Court must explain why it accepted the prosecutors' challenge of Amanda's and Raffaele's acquittals by an appeals court, which had blasted the prosecution's case.
But prosecutors raised what they called 16 errors by that court, saying evidence was basically brushed aside.
Once the judges announce their reasoning, that will shape the trial, including whether there might be more investigation or retesting of old evidence.
According to Attorney Alexander Guttieres, "For sure it'll be more difficult now to defend Amanda and Raffaele."
But is conviction possible, now?
"There is a realistic chance they could be convicted. Now they have an uphill climb because much negative evidence that was excluded in the court of Aziz will be reconsidered."
Even if convicted, it's likely Knox would be able to stay in the United States, though travel could be tricky to countries with strict extradition treaties with Italy.
The new trial isn't expected to begin until next year at the earliest with a verdict possibly in 2016.