She insisted that Guede “acted alone” in murdering Ms. Kercher.
But the Italian Supreme Court ruled that the Leeds University student was killed by more than one person, with the other or other attackers not being identified.
“If he truly acknowledged his responsibility, it would end the Kercher family, it would end the obscure speculation around this case, it would restore my wrongly damaged reputation and that of Raffaele.”
“Today Rudy is free and he has yet to tell the truth, allowing others to continue to bear the burden of his guilt,” Ms. Knox wrote. “Guede could do all of this now. He might ask for forgiveness.
Ms Knox, of Seattle, and her then-boyfriend Raffaele Sollecito were initially charged with the murder of Ms Kercher and convicted in their first trial in Perugia.
They both spent four years in prison. After a long legal saga, they were then acquitted by the Supreme Court of Rome.
Ms Kercher, 21, of Coulsdon, Surrey, was murdered in November 2007. She was studying abroad for a year in Perugia, a popular destination for international students.
While Ms Knox says she was falsely accused by Guede, she in turn falsely accused her then-boss of Ms Kercher’s murder.
She told police during her initial questioning that the murder was committed by Patrick Lumumba, a Congolese who ran a pub in Perugia.
He spent nearly two weeks in prison before being cleared of any involvement in the crime.