Amanda Marie Knox (born July 9, 1987) is an American woman who spent almost four years in an Italian prison following her wrongful conviction for the murder of Meredith Kercher. Knox, then aged 20, had called the police after returning to her and Kercher's flat after spending the night with her boyfriend. Following an interrogation, the conduct of which is a matter of dispute, Knox implicated herself. She, her boyfriend, and her employer were charged with the murder, but after bloodstained fingerprints belonging to Rudy Guede an acquaintance of Kercher's boyfriend, were found on Kercher's possessions, Guede was substituted for the employer in the charges. Wikipedia