Judge Alessandro Nencini also suggested in an interview with Corriere della Sera published today that the decision of Knox's ex-boyfriend and co-defendant, Raffaele Sollecito, not to testify may have worked against him.
"It's the defendant's right, but it certainly deprived the process of a voice," Nencini was quoted as saying. "He limited himself to spontaneous declarations.
He said only what he wanted to say without letting himself be cross-examined." Knox did not appear at the trial, but sent a letter to the court saying she feared wrongful conviction.
As the case has moved through Italy's court system, prosecutors have offered differing explanations for Kercher's killing, asserting in the first trial that Kercher was killed when an erotic game went awry and in the latest trial saying the violence was rooted in a longstanding disagreement over cleanliness. Both Sollecito and Knox deny involvement.
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Nenci, another judge and six lay jurors reinstated the guilty verdicts on Thursday against Knox and Sollecito that were first handed down in 2009, sentencing Knox to 28 ½ years and Sollecito to 25 for the murder. An appeals court had acquitted the pair in 2011 and ordered them freed from prison, but Italy's supreme court threw out the acquittals and ordered a third trial, in Florence.
Lawyers for both Knox and Sollecito have said they would appeal, saying there was no proof that the two had committed the crime. Knox has said she will never willingly return to Italy to serve any sentence if the verdict is upheld.