Hinterkaifeck: Ghosts in the Attic (S02E03)

In the remote German countryside, during the interwar period, a family settles in for the night, oblivious to the fact that a murderer lurks within the very walls and attics of their home. This unseen specter has been silently observing them, biding his time for the perfect moment to pounce, all leading to one of the most notorious unsolved mysteries in history.