Hinterkaifeck Farmstead Murders

In 1922, 6 inhabitants of a small farmstead in German countryside were found murdered. Days prior to the crime, farmer Andreas Gruber discovered footprints in the snow leading from the edge of the forest to the farm, but none leading back. He also heard footsteps in the attic and found an unfamiliar newspaper on the farm. The house keys went missing several days before the murders. Investigators believe that four victims were lured into the barn one by one, where they were killed. The perpetrator then went into the house to kill the remaining victims. It was established that a mattock was the most likely murder weapon. The case still remains unsolved.