He apparently had a soundproof basement in his house, which was in the Austin neighborhood (then upper middle class, now one of Chicago's worst neighborhoods), where he would take people down to torture them. Somebody should go to the house to see if it's still there!

He is rumored to have once kidnapped a random black guy on the south side, take him back to his house and forced the guy and his own wife to have sex, to punish her for something.

His protegee Spilotro finally killed him with a shotgun. Shot his arm off, then shot him again and finished the job.

There is a book on him called "A Mob of His Own."