I know there's tons of examples, but I could never get over Giovanni Brusca having that poor, 11- year old boy, Giuseppe Di Matteo, in Sicily, kidnapped and spending the next 2 years having him beaten and tortured, while sending pics of him to his father. Then dissolving his body in acid. Maybe the fact that it was a child, I don't know. Brusca was a monster, though. They are still making arrests even today, surrounding that boy's kidnapping, as the names of the men involved have come to light in recent years.