Lake Bodom murders
1960 CE.
Shown on the map at 60.242°, 24.675°.
The Lake Bodom murders is an unsolved 1960 homicide case in which three teenage campers were killed and another seriously injured in Finland. The case is one of the most notorious crimes in modern Finnish history. Sometime between 4:00 a.m. and 6:00 a.m. (EET) on 5 June 1960, at Lake Bodom in Espoo, Uusimaa, Maila Irmeli Björklund (15), Anja Tuulikki Mäki (15), and Seppo Boisman (18) were killed by stabbing and blunt-force trauma to their heads while sleeping inside a tent. The fourth youth, Nils Gustafsson, then-aged 18, was found outside the tent with broken facial bones and stab wounds. Despite extensive investigations, the perpetrator was never identified and various theories on the killer's identity have been presented over the years. Gustafsson was unexpectedly arrested on suspicion of committing the murders in 2004, but he was found not guilty the following year.
Text from the Wikipedia article Lake Bodom murders, licensed CC BY-SA 4.0.