Killa is a member of the Dell Farm Crew and student at school. He earned the nickname from having stabbed many people, and Harri spends much of the novel suspecting that Killa was the person who murdered . Killa starts dating and treats her badly, burning her hands with a lighter. At the end of the novel, Killa freaks out when Harri and collect his fingerprints and when he finds out that they have a picture of the dead boy. Although it is never specified in the text, it is reasonable to assume that Killa stabs Harri at the end of the novel as a form of revenge and to prevent Harri from telling the police that Killa is the murderer.