“In her, there is a double soul: the good, angelic, compassionate one ... tender and ingenuous, and the Lucifer-like, demonic, satanic, diabolic one that at times wanted to live out borderline, extreme actions and dissolute behaviour.”

Amanda Knox arrives at the courthouse for the appeal trial in Perugia, Italy, Friday. (Stefano Medici/AP)

Pacelli also called Knox a “strega,” or “deceptive witch.”

Knox and her boyfriend, Raffaele Sollecito have been convicted in the murder of Kercher in, Knox’s roommate, a drug-fuelled sex session. Public opinion is sharply divided about the case, with many in the United States believing that she is innocent. Knox and Sollecito are appealing to a higher court.

Pacelli represents Diya “Patrick” Lumumba, whom Knox initially accused of killing Kercher. He was jailed for two weeks.

The prosecution on Saturday said that both people should be given jail terms of life on the grounds that they had no motive for the killing, the Guardian reports.

A verdict is expected in early October.