Rudy Guede insists Meredith Kercher killer is still free "I often hear people who have never known me and anything about the trial saying I am a liar, a drifter or whatever," he said. If I am a liar, I say to the judges, well then what is the truth? Miss Knox and her ex-boyfriend were convicted of murder and sexual assault and sentenced to 26 years and 25 years in jail respectively. But their sentences were overturned at an appeals trial in Perugia in 2011, after DNA evidence was ruled inconclusive and inadmissible. Miss Knox and Mr Sollecito were released from prison, but in March this year the Supreme Court questioned their acquittals and ordered a second appeals trial. Guede urged the judges to ignore evidence from "people like Mario Alessi," a child killer who previously testified that Guede had told him in a prison exercise yard Miss Knox and Mr Sollecito were innocent of the murder. "Unfortunately the truth has still not been revealed and never will be if you continue to listen to people like Mario Alessi and others like him," Guede said in his letter. On Friday DNA tests on the kitchen knife allegedly used to kill Miss Kercher showed that it belonged to Amanda Knox rather than the British student, raising doubts about whether the knife was the murder weapon. The results of the tests were hailed as a victory by Miss Knox's defence lawyers, who are seeking to prove her innocence at the trial.