Cavataio was backed by other Mafia families who resented the growing power of the Mafia Commission to the detriment of individual Mafia families . Cavataio was killed on December 10 , 1969 , in the so-called Viale Lazio massacre in Palermo as retaliation for the events in 1963 . According to Buscetta and Grado , the composition of the hit squad was a clear indication that the killing had been sanctioned collectively by all the major Sicilian Mafia families : not only did it include Calogero Bagarella and Bernardo Provenzano from Corleone , and members of Stefano Bontade 's family in Palermo , but also a soldier of Giuseppe Di Cristina 's family on the other end of Sicily in Riesi
Viale Lazio massacre
Viale Lazio massacre
Sicilian Mafia Commission