Palermo's general prosecutor Antonino Gatto gestures as he speaks during the trial where testimony of Mafia informer Gaspare Spatuzza was due to be heard in Turin December 4, 2009. Italian Prime Minister Silvio Berlusconi goes back on trial for corruption on Friday, while in an unrelated Mafia case, a mobster-turned-witness may try to link him to the Cosa Nostra -- a connection he denies. Dell'Utri, a senator in Berlusconi's People of Freedom Party, is appealing against his conviction of association with the Mafia. He has been sentenced to nine years in prison. REUTERS/Alessandro Garofalo(ITALY CRIME LAW POLITICS)