She didn't die, the silencer broke off, and the bullets were flying all over the place. Chiodo was a big earner from what I've read, he was involved in union rackets, and heavily involved in waste managment. Casso had given him word from the crooked cops one of his trailers was being bugged and under camera surveillence, instead of dealing with the problem discreetly he had some big gorilla in a fedora and under shirt climb up polls and take down the cameras the next day while law enforcement was watching, after that he was supposedly no longer trusted by Casso.