sentences:  His membership of Cosa Nostra was to be kept confidential in order to work exclusively for Riina and his uncle.He became one of the many killers at the disposal of the Corleonesi in the Second Mafia War.He was only 19 when he participated in the so-called "Christmas Massacre" when, on the afternoon of December 25, 1981, in Bagheria, three Mafiosi – including Giovanni Di Peri, the boss of Villabate – and an innocent bystander were murdered.