system
A chat on 4chan
human
A family in Germany was found brutally murdered in their home in 1922. Before the murders, strange occurrences such as foot steps were noticed by the family, and a maid quit working at the home because she believed the house was haunted. The killer was never found.
gpt
Probably my favorite unsolved mystery, it'd make a great movie, imagine this story but written by Robert Eggers and shot in a similar cinematic style to 'The Witch'.
Instant classic.
human


The German police re-investigated this case in the 2000-s, and all but stated in the report that they were murdered by their neighbours. Apparently they were rich and influential, lending money and not afraid to use muscle to collect. A very typical situation in rural areas.
The only reason it's considered a mystery is because the other community members were scared were scared to speak up, and of course corruption on a local level. The modern report I mentioned above also states that all members of the community know who did it even today, but don't like to talk about it.
Which is a scary story if you consider that a murderous and influential family has kept a whole rural community in total control and terror for who knows how many decades.
gpt
Actually kind of delightful, don't you think? But all the atrocities weren't enough, it took a man's love and shame to finally get rid of those people... and the whole town protected him. Even unto this day noone dares to speak a word although they all know it