Wallace reiterates the idea that Duror killed Calum to try to cleanse his own twisted hatred of the world, as he saw Calum as embodying ugliness, which Duror couldn't stand. When this didn't work, Duror turns his gun on himself. The two detectives then leave to return to Glasgow.
Ask students to list the reasons given as to why Duror killed himself and whether the novel's climax leaves a positive or negative message. They should consider how the conclusion relates to the novel's themes. Ask students to consider the relevance of this text to their own lives, thinking about topics such as prejudice, injustice, disability, discrimination, responsibility and respect for others.