Jürgen Bartsch (born Karl-Heinz Sadrozinski; November 6, 1946 – April 28, 1976) was a West German serial killer who murdered four boys aged between 8 and 13 and attempted to kill a fifteen-year-old boy. The case of this sexual offender was the first in German jurisdiction history to include psycho-social factors of the defendant, who came from a violent early surrounding, to set down the sentence. Source: Wikipedia (en)