On 5 October 2005, the trial began in Rome of the five individuals charged with Calvi's murder. The defendants were Calò, Carboni, Kleinszig, Ernesto Diotallevi, and Calvi's former driver and bodyguard Silvano Vittor. The trial took place in a specially fortified courtroom in Rome's Rebibbia prison. All five were cleared of murdering Calvi on 6 June 2007. Judge Mario Lucio d'Andria threw out the charges, citing "insufficient evidence" after hearing 20 months of evidence. The court ruled that Calvi's death was murder and not suicide. The defence suggested that there were plenty of people with a motive for Calvi's murder, including Vatican officials and Mafia figures who wanted to ensure his silence. Legal experts following the trial said that the prosecutors found it hard to present a convincing case due to the 25 years that had elapsed since Calvi's death. Additionally, key witnesses were unwilling to testify, untraceable, or dead. The prosecution called for Manuela Kleinszig to be cleared, stating that there was insufficient evidence against her, but they sought life sentences for the four men.