 Suspicion fell on Calcedonio Di Pisa, who had collected the heroin for Manzella from the Corsican supplier, Pascal Molinelli, and had organised the transport to Manzella’s partners in New York.The case was brought before the Mafia Commission, but disagreement on how to handle it, and old hostility towards the La Barberas, led to a bloody conflict, between clans allied with the Grecos, headed by Salvatore Greco "Ciaschiteddu", and clans allied with the La Barberas.What sparked a series of attacks and counter-attacks was the killing of Di Pisa on December 26, 1962.