Convicted mob hitman dies in prison

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One of Chicago’s most notorious mobsters is dead.

Frank Calabrese Sr died at a federal prison in North Carolina on Christmas Day.

He was 75.

The convicted mob hit man received a life sentence in 2007 in what was known as the Operation: Family Secrets trial, which was the biggest organized crime case in Chicago in years.

Calabrese and other defendants were convicted of operating the Chicago outfit as a racketeering enterprise.