Amanda Knox conviction in Italy could spur lengthy extradition fight

(Reuters) - Italy's conviction of Amanda Knox for the murder of her British roommate when the two were exchange students together could spur a drawn-out fight over extradition in the United States, where supporters contend she is the victim of a faulty foreign justice system.

If Knox's conviction is ultimately confirmed pending further appeals, her lawyers are expected to argue that the United States cannot send her to Italy in part because of U.S. constitutional guarantees against "double jeopardy," although some experts say that could be a tough case to prove.