The Lake Bodom murders is one of the most infamous unsolved homicide cases in Finnish criminal history. On 5 June 1960, at Bodom Lake, 15-year-old females Maila Irmeli Björklund and Anja Tuulikki Mäki and 18-year-old male Seppo Antero Boisman were killed by stabbing and blunt-force trauma to their heads, while sleeping inside a tent. The fourth youth, Nils Gustafsson, then 18 years old, 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.