This is a Sicilian thing , i am sure Sicilians whacked him because he was involved in getting Inzerillos back to Sicily.
IDK his business with them has been mostly invisible, but I do read many years ago Calì was offended for having been excluded from some construction works carried out in the USA by a nephew of Salvatore Badalamenti, very close to the boss of Torretta, Vincenzo Brusca.
I read that they are very powerful in construction in USA.
