finger is later sent to Kripos; it has a ring on it with a small, red five-pointed diamond. A few days later a third victim is found, this time in the female toilets at a law firm, also on the floor and a five-pointed red diamond on the body. Yet again a finger has been removed. Waaler – who has heard about Hole's suspicions – offers to include him in his illegal dealings, dangling the large financial benefits of his criminal activities as an inducement. In return, Hole has to perform an initiation task. Hole is initially confused as to why Waaler is effectively admitting his guilt, but is reminded that, as an alcoholic, Hole's evidence would not be sufficient to convict him if he went to his superiors. Hole agrees to think about the offer. Meanwhile, a chance sighting of a pentagram brings Hole a flash of inspiration. The five-pointed diamonds found on the victims are in a similar shape – known as a Devil's Star – and provide a major clue as to the next possible murder locations, which are kept under surveillance: one is in a student residence hall and the other is a house on the outskirts of the city, owned by Olaug Sivertsen. While investigating this house, Lønn discovers that the likely murderer is Olaug's son, Sven. She informs Hole by phone as he and Waaler are checking out the other prospective crime scene. Hole gives this information to Waaler, who immediately leaves to assist Lønn. Hole, using recently installed CCTV cameras, notices another pentagram on a student's door. Eventually, the body of the victim is found at the residence hall, and is determined to actually be the first victim of the serial killer, murdered five days before the first discovered victim. Meanwhile, Waaler apprehends Sven, but his threats to shoot him ultimately lead Lønn to realise that he intended to murder Sven instead of arresting him, leading her to agree with Hole's suspicions. Hole is given his task by Waaler: to kill Sven in custody using a poison capsule, as Waaler's influence is such that he can guarantee that Hole will get away with the murder. Waaler's argument for Sven's murder is that he would get a lenient punishment from the Norwegian judicial system, and that death would be a worthy sentence for his crimes. Hole realizes however that Waaler's desire to kill Sven