FLORENCE, Italy (AP) -- Amanda Knox says she is frightened and saddened by her "unjust" murder conviction in the death of her British roommate Meredith Kercher.
Knox's lawyers have vowed to appeal to Italy's highest court.
In a statement issued from Seattle on Thursday after her conviction was upheld, Knox blamed overzealous prosecutors and a "prejudiced and narrow-minded investigation" for what she called a perversion of justice and wrongful conviction.
She said she expected more from the Italian justice system.
An appeals court in Florence on Thursday upheld the guilty verdict against U.S. student Amanda Knox and her ex-boyfriend for the 2007 murder of her British roommate. Knox was sentenced to 28 1/2 years in prison, raising the specter of a long legal battle over her extradition.
After nearly 12 hours of deliberations, the court reinstated the guilty verdict first handed down against Knox and Raffaele Sollecito in 2009. The verdict had been overturned in 2011 and the pair freed from prison, but Italy's supreme court vacated that decision and sent the case back for a third trial in Florence.
Sollecito, whose lawyers said they would appeal the verdict, was sentenced to 25 years. Reached by telephone, Knox's father, Curt Knox, said he had no comment.
While Sollecito was in court Thursday morning, he didn't return for the verdict, and the 26-year-old Knox was home in Seattle awaiting the decision with, in her own words, `'my heart in my throat."
Sollecito's lawyers said they were stunned and would take their appeal to Italy's top court. "There isn't a shred of proof," said attorney Luca Maori said.
Presiding Judge Alessando Nencini ordered the 29-year-old Sollecito's passport revoked but made no requests for Knox's movements to be limited, saying she was "justifiably abroad."
Knox's defense team gave its last round of rebuttals earlier in the day, ending four months of arguments in Knox's and Sollecito's third trial for the 2007 murder of her British roommate, Meredith Kercher, in the Italian university town of Perugia.
Knox's lawyer, Carlo Dalla Vedova, had told the court he was "serene" about the verdict because he believes the only conclusion from the files is "the innocence of Amanda Knox."
"It is not possible to convict a person because it is probable that she is guilty," Dalla Vedova said. "The penal code does not foresee probability. It foresees certainty."