The Lake Bodom murders is one of the most infamous unsolved homicide cases in Finnish criminal history. On 5 June 1960, at Bodom Lake in Espoo, Uusimaa, Maila Björklund and Anja 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. 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. Murders On Saturday, June 4, 1960, four Finnish teenagers had decided to camp along the shore of Lake Bodom (Finnish: Bodominjärvi, Swedish: Bodom träsk), near the city of Espoo's Oittaa Manor. Maila Irmeli Björklund and Anja Tuulikki Mäki were both aged 15 at the time; accompanying them were their boyfriends, Seppo Antero Boisman and Nils Wilhelm Gustafsson, both aged 18. 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. Gustafsson, the only survivor of the massacre, had fractured facial bones that appeared to confirm his story of being a victim. He stated afterwards that he had seen a glimpse of an attacker clothed in black with bright red eyes coming for them. At about 6:00 a.m., a group of boys birdwatching some distance away had reportedly seen the tent collapsed and a blond man walking away from the site. The bodies of the victims were discovered at about 11:00 a.m. by a carpenter named Esko Oiva Johansson. He alerted the police, who arrived on the scene at noon. Initial investigation The killer had not injured the victims from inside the tent, but instead had attacked the occupants from outside with a knife and an unidentified blunt instrument (possibly a rock) through the sides of the tent. The murder weapons have never been located. The killer had taken several items which detectives found puzzling, including the keys to the victims' motorcycles, which themselves had been left behind. Gustafsson's shoes were partially hidden approximately 500 meters from the murder site. The police did not cordon off the site nor record the details of