The killer children in history. Real events

Scary stories about crimes committed by adolescents. There are even serial maniacs. Some were released! There are girl killers… 12 biographies. From these facts, blood cools! Ruthless little monsters, their habits, crimes and punishments… In Japan, England, Russia, the USA, Ukraine… Why does it happen? Accident, genes, alcoholism, poverty, wrong upbringing, guilt of parents or society?