Friedrich Heinrich Karl "Fritz" Haarmann was born on 25 October 1879 in Hanover, Germany. By the time police arrested him on 23 June 1924, he had become one of Weimar Germany's most notorious serial killers, systematically preying on vulnerable young men and boys for over six years.

Haarmann typically selected his victims from among the vagrants and runaways who congregated around Hanover's train station. These were young men with few connections, few people looking for them—ideal targets for a predator operating in plain sight. Between 1918 and 1924, with the most active period spanning 1919 to 1924, he lured them to his apartment where he sexually assaulted them. His method of killing was particularly brutal: manual strangulation combined with biting through the victim's Adam's apple or throat. After murdering his victims, Haarmann dismembered their bodies and disposed of the remains in the River Leine.

The sheer scale of his crimes only became apparent during the investigation. Police dredged over 1,500 human bones from the river, their flesh already removed by the water. Detectives also recovered victims' clothing and possessions from Haarmann's apartment—evidence that would prove crucial to the prosecution.

Haarmann did not act entirely alone. Hans Grans, his accomplice, helped select victims and profited by selling the dead men's belongings. This partnership extended Haarmann's killing spree and added another dimension to his crimes: commercial exploitation of his victims even in death.

Interestingly, Haarmann had worked as a police informant, giving him a degree of protection and access that may have emboldened his criminal activities. This unusual position made his eventual capture all the more shocking to Hanover's citizens and authorities alike.

When finally confronted, Haarmann confessed to killing between 50 and 70 people, though only 24 murders could be definitively established for trial. He claimed his killings were not premeditated but instead erupted in moments of what he called "rabid sexual passion" or ecstasy—an irresistible compulsion to bite through his victims' throats. This explanation, while rejected by the court, provided a window into the psychological state of a man who saw his violence as something beyond his control.

One persistent rumor suggested Haarmann had sold human flesh as meat to unsuspecting customers. Haarmann himself denied this claim, and crucially, no medical expert testimony or physical evidence of human flesh was found in his apartment. Despite its lurid appeal, this aspect of his crimes appears to be myth rather than fact.

The trial took place at the Hannover Assizes in late 1924, lasting 14 days with approximately 190 to 200 witnesses testifying. On 19 December 1924, the court found Haarmann guilty of 24 murders out of the 27 with which he was charged. The judges deemed him sane, and he received a sentence of death by beheading. Grans was convicted on lesser counts and imprisoned.

Fritz Haarmann was executed by guillotine in Hanover on 15 April 1925, ending the life of a killer whose crimes had terrorized the city for years. His case remains a landmark in German criminal history—a stark reminder of how predators can operate within society, targeting the most vulnerable members, sometimes even while maintaining respectable connections to authorities.

**Sources**

https://allthatsinteresting.com/fritz-haarmann

https://en.wikipedia.org/wiki/Fritz_Haarmann

https://www.serialkillercalendar.com/Friedrich%20HAARMANN.php

https://en.histoires-vraies.net/E_criminal_cases/E_Ogre_Hanovre.html

https://www.youtube.com/watch?v=kZzQPbK2RvM