Palermo, March 7 - A preliminary hearing judge on Thursday said that all 10 defendants charged in a probe into alleged negotiations between the Mafia and the Italian State in the early 1990s be sent to trial. The trial is set to begin on May 27 in Palermo. Among the 10 defendants are former Italian Interior Minister Nicola Mancino and Marcello Dell'Utri, a senator who has worked closely with former premier Silvio Berlusconi since the 1970s and helped the media magnate form his first political movement, Forza Italia, in 1993. The case regards alleged negotiations between the Mafia and the Italian State in the early 1990s, including notorious Mafia bosses, ex-anti-Mafia police officers and current members of parliament. It has been suggested that State officials entered negotiations with Cosa Nostra in a bid to stop attacks after a long campaign of violence that culminated in two bombings in 1992, which killed anti-Mob prosecutor Giovanni Falcone, his wife, fellow prosecutor Paolo Borsellino, and several bodyguards.