World Lawyer for Amanda Knox's ex-boyfriend makes final appeal, urging court to overturn murder conviction

Judges at the high Court of Cassation began deliberating shortly after noon, and a decision could come late Friday.

Alessandra Tarantino/AP

Lawyers for Amanda Knox's ex-boyfriend made a final appeal to Italy's top criminal court Friday, urging it to overturn the pair's murder conviction for the 2007 slaying of Knox's roommate, saying there were errors of "colossal proportions" in the guilty verdicts.