For the first time, devoted to various facts focuses on adolescents who have become criminals in France and Belgium. Each year, more than 90,000 minors are tried in criminal proceedings. Some have committed the irreparable and have become rapists, murderers or murderers. How and above all why did these minors, overnight, commit the irreparable? It is often in their childhood, their history, that the key to these tragedies is found. Painful cases which destroyed forever two families, that of the victims and that of these adolescents.