The authors dwell in particular on the phenomenon of “juvenile” or “acid Satanism”. This term generally means “organized” groups of young people celebrating Satanic rites, having in common and sharing places, clothing, symbols, gestures, music, and most of all drugs. Often under the influence of alcohol and drugs the Acid Satanists often commit irreverent gestures, and sometimes, violent crimes or heinous crimes, as in the cases presented here. The murders were committed by groups of young people defining themself Satanists, having however no coincidence with the historical and cultural phenomenon of Satanism, being rather marginalized and violent young people.