The Lake Bodom murders is an unsolved homicide case in which three teenage campers were killed and another seriously injured in Finland.

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 and Anja Tuulikki Mäki (both 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.

[3][4][5] Sometime between 4:00 a.m. and 6:00 a.m. (EET) during the early morning hours of Sunday, June 5, 1960, Mäki, Björklund and Boisman were all stabbed and bludgeoned to death by an unknown assailant.

[5] Björklund, Gustafsson's girlfriend, was found undressed from the waist down and was lying on top of the tent, and had suffered the most injuries out of all of the victims.

[7] Most public suspicion focused on Hans Assmann, a German-born naturalized Finnish citizen,[8] who lived several kilometres from the shore of Lake Bodom.

During the mid-1960s, an individual named Pentti Soininen, known for his violent tendencies, claimed to a fellow inmate that he was responsible for the murders that occurred at Lake Bodom.

According to the prosecution's interpretation of the bloodstains, Gustafsson had been drunk and excluded from the tent when he attacked the other boy, getting his jaw broken in a fight which escalated into him committing three murders.

The prosecution attempted to bolster their case by alleging an identification by two birdwatchers of Gustafsson as the tall blond man at the scene of the crime, an assertion that he had been overheard making an incriminating remark, and also that a decade after the event he had boasted to a woman about his guilt.

The court explained the verdict as due to the prosecution’s evidence being inconclusive, failure to show Gustafsson had a motive appropriate to a crime of such extreme seriousness, and certainty about the facts now being impossible given the time that had elapsed.

[10] The State of Finland paid him €44,900 for the mental suffering caused by the long remand time, but the public prosecutor refused to sue Finnish newspapers for defamation.