 The NBI has searched for Haantie from the forest areas in Hausjärvi as late as in 2017, claiming that they have information that connects Haantie to the area.In 2017 it was published in the media that there had been a possible fourth case involving the murders.In 1989 a drunken 30-year-old woman had just exited a restaurant in Järvenpää when a man offered her a ride, offering her alcohol and pills and then driving her to a forest area, the case resembling the case of Helena Meriläinen's.