Amanda Knox, right, listens to her lawyer Maria Del Grosso, at the Perugia court, Italy, Saturday, May 21, 2011. A tearful Amanda Knox said Saturday that being in prison is "very frustrating and mentally exhausting" as the American student convicted of murdering her roommate insisted she is innocent and does not want to spend the rest of her life behind bars. Knox was emotional as she briefly addressed the appeals court in Perugia at the end of the session, her voice breaking at times and her eyes tearing up. She was convicted in 2009 of sexually assaulting and murdering Meredith Kercher of Britain, and sentenced to 26 years in prison. (AP Photo/Stefano Medici)