Buscetta linked him with two of the most notorious mafiosi: Salvatore Riina and Bernardo Provenzano, the leaders of the most powerful Mafia group, the Corleonesi, from Ciancimino's hometown.
In 1992, following the Mafia murders of Salvo Lima and the Antimafia judges Giovanni Falcone and Paolo Borsellino, Ciancimino, was approached by Carabinieri Colonel Mario Mori and had several secret meetings.