Bruno Lüdke (1909-1944) was an alleged German serial killer.
Declared insane, he was sent to a Vienna hospital, where experiments were carried out on him until he died by lethal injection in 1944.
Many believe Bruno Lüdke to be the victim of a frame-up, carried out by an ambitious Kriminalkommisar (chief homicide investigator) Franz, the heavily censored Reichskriminalpolizeiamt, and the budding Nazi government, that had little patience with the mentally challenged.
German born in 1909, Ludke was a petty thief and mental defective who derived sadistic pleasure from torturing animals.
Upon reflection, Ludke made a full confession to the homicide, informing officers that under Paragraph 51 a law dealing with mental defectives - he was immune from indictment.
Kommissar Franz spent a year checking Ludke's confessions, emerging convinced that his suspect was guilty of numerous murders; conversely, some critics maintain that police saw the chance to unload open cases on Ludke and thereby save face.