A former head of the Chicago mob, Alfonso "Pizza Al" Tornabene, died Sunday after a career in organized crime that spanned decades but often remained in the shadows.

Tornabene, 86, headed the Chicago mob while another leader, James Marcello, was in prison several years ago, according to testimony at the historic Family Secrets mob trial in Chicago.

Marcello was apparently unhappy with Tornabene's stewardship of the mob while he was in prison and promised to shape things up when he got out, according to a secret FBI recording of Marcello.

Tornabene was once clearly a target of the Family Secrets case but was never charged.

A long-time owner of a pizza shop in Stickney, Tornabene had disavowed any Outfit connection.

Tornabene died of natural causes.