The trial of 15 people accused of the 1999 murder of an Italian government advisor is due to get underway in Rome.The 15, believed to be members of the Red Brigade, will also face charges of robbery and belonging to an armed organisation. The trial will take place at the high security Rebibbia prison. Seventeen people were initially charged in the case. However two women, who are understood to have cooperated with authorities, will be tried separately. Professor Massimo D’Antona, an expert on labour law and an advisor to the left wing government in power at the time, was gunned down on a Rome street in May 1999. Five of the 15 on trial in Rome are also facing charges in Bologna, where they are accused of the murder of another government advisor, Marco Biagi, who was killed in March 2002.