Ernst Gennat
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Ernst August Ferdinand Gennat was director of the Berlin criminal police. He worked under three political systems in his 30-year career as one of the most gifted and successful criminologists in the German Reich. His caseload included those of Fritz Haarmann and Peter Kürten.
Ernst Gennat's grave at the Stahnsdorf South-Western Cemetery
The Alexanderplatz with the police headquarters (middle)
M (1931 film)
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M is a 1931 German mystery suspense thriller film directed by Fritz Lang and starring Peter Lorre as Hans Beckert, a serial killer who targets children. An early example of a procedural drama, the film centers on the manhunt for Lorre's character, conducted by both the police and the criminal underworld.
Peter Lorre as Hans Beckert, gazing into a shop window. Fritz Lang uses glass and reflections throughout the film for expressive purposes.