Amanda Knox speaks at a Criminal Justice Festival at the University of Modena, Italy, Saturday, June 15, 2019. Knox faces yet another trial for slander in a case that could remove the last remaining guilty verdict against her eight years after Italy's highest court definitively threw out her conviction for the murder of her 21-year-old British roommate, Meredith Kercher. (AP Photo/Antonio Calanni)
FILE- Congolese pub owner Diya "Patrick" Lumumba who was originally jailed for the murder of Meredith Kercher, looks on outside Perugia's court, central Italy, Tuesday Sept. 16, 2008. Amanda Knox faces yet another trial for slander against Lumumba in a case that could remove the last remaining guilty verdict against her eight years after Italy's highest court definitively threw out her conviction for the murder of her 21-year-old British roommate, Meredith Kercher. (AP Photo/Antonio Calanni, File)
FILE- Diya "Patrick" Lumumba, left, a Congolese citizen who was originally jailed for the murder of Meredith Kercher, flanked by his lawyer Carlo Pacelli, arrives at the Italy's highest court building, in Rome, Friday, March 27, 2015. Amanda Knox faces yet another trial for slander against Lumumba in a case that could remove the last remaining guilty verdict against her eight years after Italy's highest court definitively threw out her conviction for the murder of her 21-year-old British roommate, Meredith Kercher. (AP Photo/Riccardo De Luca, File)
FILE - Rudy Hermann Guede, center, is escorted by Italian penitentiary police officers as he leaves Perugia's court, Italy, Friday, Sept. 26, 2008. Guede was convicted for the slaying of Meredith Kercher in Perugia, Italy, where she was studying and sharing an apartment with U.S. student Amanda Knox. Guede has denied killing Kercher. Amanda Knox faces yet another trial for slander in a case that could remove the last remaining guilty verdict against her eight years after Italy's highest court definitively threw out her conviction for the murder of her 21-year-old British roommate, Meredith Kercher. (AP Photo/Pier Paolo Cito, File)
FILE - In this Sept. 26, 2008 Amanda Knox, center, is escorted by Italian penitentiary police officers to Perugia's court. Amanda Knox faces yet another trial for slander in a case that could remove the last remaining guilty verdict against her eight years after Italy's highest court definitively threw out her conviction for the murder of her 21-year-old British roommate, Meredith Kercher. (AP Photo/Pier Paolo Cito, File)
FILE - Amanda Knox, left, talks to reporters as her mother, Edda Mellas, right, looks on outside Mellas' home in Seattle, Friday, March 27, 2015. Amanda Knox faces yet another trial for slander in a case that could remove the last remaining guilty verdict against her eight years after Italy's highest court definitively threw out her conviction for the murder of her 21-year-old British roommate, Meredith Kercher. (AP Photo/Ted S. Warren, file)
FILE - Rudy Guede, left, leaves the penitentiary for a temporary release of thirty-six hours, in Viterbo, Italy, on June 25, 2016. Guede, the only person convicted in the 2007 murder of British student Meredith Kercher has been freed after serving most of his 16-year prison sentence. Amanda Knox faces yet another trial for slander in a case that could remove the last remaining guilty verdict against her eight years after Italy's highest court definitively threw out her conviction for the murder of her 21-year-old British roommate, Meredith Kercher. (AP Photo/Gregorio Borgia, File)
FILE - An undated photo of Meredith Kercher, American student Amanda Knox's flatmate in Perugia, central Italy, where she was found dead on the floor of her bedroom on Nov. 1, 2007. Amanda Knox faces yet another trial for slander in a case that could remove the last remaining guilty verdict against her eight years after Italy's highest court definitively threw out her conviction for the murder of her 21-year-old British flatmate, Meredith Kercher. (AP Photo/files)