U.S. student Amanda Knox went on trial again for the murder of her roommate opened in Italy on Monday, but she was not in court.

Italy's highest court ordered a new trial for Knox and her former Italian boyfriend, overturning their acquittals in the 2007 slaying of Meredith Kercher with a harsh assessment of an appeals court acquittal in 2011. The Court of Cassation said the acquittal was full of "deficiencies, contradictions and illogical" conclusions.