* Jürgen Bartsch: killed four, one escaped; died by wrongful overdose during castration surgery

* Karl Denke: cannibal; allegedly killed 30–40 people in the 1920s

* Volker Eckert: accused of 19 murders between 1974 and 2006

* Gesche Gottfried: serial poisoner who murdered 15 people in Hanover and Bremen; publicly executed in 1831

* Karl Grossmann: killed women and sold their flesh on the black market

Fritz Haarmann: preyed on young men and boys; executed in 1925

Paul Ogorzow: AKA the "S-Bahn murderer"; SA sergeant convicted of raping and murdering eight women by throwing them off trains in Berlin during blackouts in 1941 and 1942

* Joachim Kroll: claimed 13 victims over three decades

* Peter Kürten: AKA the "Vampire of Düsseldorf"; executed in 1932

* Stephan Letter: male nurse who killed 29 patients; arrested in 2006

* Marianne Nölle: female nurse who was convicted of killing seven patients between 1984 and 1992; suspected of killing 17; sentenced to life imprisonment in 1993

Fritz Honka: murdered four women in Hamburg and kept the bodies in his apartment

Norbert Poehlke, AKA 'The Hammer-Killer': police officer, bank robber and serial killer