The question of whether the mafia was a state of mind or an organisation has been settled by the revelations of Tommaso Buscetta. This chapter discusses the nature of the internal organisation taken from the prosecution case in the 1986 'maxi-processo' (Maxi-Trial). Mafia boss from Riesi who provided the police with information about the developing split inside Cosa Nostra and the rise of the Corleonese faction, which would lead to the mafia war of 1980-83. In 1973, Leonardo Vitale became the first mafioso in modern times to collaborate with the police. His testimony was dismissed, and he himself was convicted and locked up in a mental hospital. He was finally released in 1984. but was murdered by the mafia some months later.