I'll post more info tomorrow when I have time but I think I've read a lot that says it was the musitanos. They were definitely a factor at the time. Tony was in prison for the firebombing extortions of Hamilton bakeries. And I believe he pled guilty to murder conspiracy as well as his nephew giuseppe avignone. Domenic pled to accessory after the fact
http://xxxorganizedcrime.com/crime-encyclopedia-r/

There's one