U.S. murder suspect Amanda Knox, right, is escorted by a penitentiary police officer as she arrives at Perugia's court, Italy, Friday, Nov. 20, 2009. Italian prosecutors have begun their closing arguments in the trial of American student Knox, accused of killing her British roommate Meredith Kercher. Knox and Raffaele Sollecito, her former Italian boyfriend, are charged with murder in the 2007 slaying of Kercher, with whom Knox shared a rented flat in the Italian city of Perugia. (AP Photo/Alessandra Tarantino)