abstract:Ernst August Wagner (September 22, 1874 – April 27, 1938) was a German mass murderer who, on September 4, 1913 killed his wife and four children in Degerloch and subsequently drove to Mühlhausen an der Enz where he set several fires and shot 20 people, of whom at least 9 died, before he was beaten unconscious by furious villagers and left for dead.