On June 5, 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, then 18 years old, Nils Wilhelm Gustafsson, was found outside of the tent with broken facial bones and stab wounds