 In May 1931, Stefano Magaddino planned on attending this important Mafia summit with his brother Antonio and cousin Peter.Because of his active role in the Castellammarese Family, Magaddino was in an important position among national crime bosses.To come along to Chicago to mingle with the nation's top Mafiosi, he invited his close friend and advisor John Montana, the #3 man in Buffalo's Mafia behind Stefano Magaddino and his brother Antonio.