Hinterkaifeck murders

The Hinterkaifeck murders occurred on the evening of 31 March 1922, when six inhabitants of a small Bavarian farmstead, located approximately north of Munich, Germany, were murdered by an unknown assailant. The six victims were Andreas Gruber (aged 63), his wife Cäzilia Gruber (aged 72), their widowed daughter Viktoria Gabriel (aged 35), Viktoria's children, Cäzilia (aged 7) and Josef (aged 2), and the maid, Maria Baumgartner (aged 44). They were all found struck dead with a mattock, also known as a "grub axe". The perpetrator(s) lived with the six corpses of their victims for three days. During this time, they ate the food in the house, fed the animals on the property, and started fires in the home's fireplace. Four of the dead bodies were found stacked up in the barn, the victims likely having been lured there, one by one. Prior to the incident, the family and their former maid had reported hearing strange noises coming from the attic, which led to that maid leaving.

The case remains unsolved to this day and is considered one of the most gruesome and puzzling unsolved crimes in German history. Provided by Wikipedia