ROME (AP) - Italy’s top criminal court says it threw out murder convictions against Amanda Knox and her former Italian boyfriend because there was absolutely no proof they were at the scene of her British roommate’s slaying. The Court of Cassation on Monday issued its formal written explanation, as required by Italian law, for its March ruling vindicating the pair once and for all in the legal battle over the 2007 murder of Meredith Kercher in Perugia, Italy.