Marcus, age 26, is a Detective Constable who works for Louise. Louise has a maternal affection for him. He is cheerful, likes helping people, and is keen to advance in his work. Louise is protective of his innocence and thinks of him as her “sweet boy.” When Marcus responds to a call at Alison Needler’s home, he is shot in the chest by David Needler and dies a week later. Louise, Marcus’s mother, and Marcus’s girlfriend, Ellie, are devastated. Marcus’s mother kills herself the day after his funeral.