In March 1922 the Gruber family, on an isolated farmstead called Hinterkaifeck, noticed footprints in the snow leading to the house but not away, heard footsteps in the attic, and found an unknown newspaper on the table. Then all six of them — and the maid who'd started that very day — were killed with a mattock, and whoever did it stayed on for days, feeding the cattle and cooking meals beside the bodies. A century later, it is still unsolved.
The best single overview of the case: the eerie warning signs, the night of the killings, and why detectives have argued about it for a hundred years without an answer.
The reference account: six victims struck down with a mattock, the maid who died on her first day, and the strange month of missing keys, phantom footsteps, and a stranger no one ever saw leave.
A full true-crime documentary that lingers on the most disturbing detail of all: the killer appears to have lived in the house for days after the murders, tending the farm as if nothing had happened.
A deep dive into the tangled web of suspects — a jealous ex-husband declared dead in the war, a neighbor, a wandering vagrant — and why every promising lead eventually collapsed.
A filmmaker travels to the site itself, walking the ground where the farmhouse stood and tracing the geography of that snowy path from the treeline to the door.
The killings were so haunting they birthed an award-winning novel and film, fictionalizing the massacre and keeping the unsolved horror alive in the German imagination.
A quieter, reflective retelling that sits with the unanswerable question at the center of it all — who watched this family for weeks, and why did they never come forward or strike again?