CRIME, DiFronzo family and organized crime [MP]

Chicago Sun-Times (Robert C. Herguth and Chris Fusco):

On paper, D&P is run by Josephine DiFronzo. But authorities contend D&P really is "controlled" by her husband Peter and his brother John, and a Chicago Sun-Times examination indicates that Peter DiFronzo is deeply involved with the company.

The DiFronzo brothers are identified in law enforcement documents as "made" members of the Chicago mob, with John "No Nose" DiFronzo, 76, allegedly one of the three top organized crime figures in the city. Peter DiFronzo, 72, allegedly is his chief lieutenant and, at least for a time, was a leader of the mob's Elmwood Park Street Crew....

[According to the FBI] the business "obtained contracts through illegal payoffs or intimidation."...

D&P and JKS contribute generously to certain politicians, including state Rep. Angelo "Skip" Saviano (R-Elmwood Park) and Republican Cook County commissioner and Elmwood Park Mayor Peter Silvestri....

Meanwhile, two workers from D&P ran unsuccessfully in the most recent Teamsters Local 731 election, raising concerns among some about whether Peter DiFronzo was trying to exert influence at his former union.

How do the DiFronzos connect with Ron Serpico, Anthony Bruno and other Proviso figures?

What is the relationship between labor unions and organized crime?