"A Roman Catholic priest and former prison chaplain who ministered to Chicago mob boss Frank Calabrese, Sr., was indicted earlier this month for illegally passing jailhouse messages from Calabrese and plotting with his associates on the outside—a sobering reminder of how deeply organized crime can reach into the community, even from behind bars.

"Members of the mob will go to almost any lengths to carry out their criminal activity," said Special Agent Ted McNamara, a veteran investigator who supervises the La Cosa Nostra (LCN) organized crime squad in our Chicago Field Office.

Calabrese, Sr., was sentenced to life in prison in 2009 for his role in 18 gangland slayings in the Chicago area dating back to 1970. His arrest—along with 13 others—was part of one of the most successful organized crime cases in FBI history, an eight-year investigation called Operation Family Secrets."