The team exhume the first victim to find vital clues with new DNA techniques. But, just when Boyd thinks he is getting closer, he finds he is facing one smokescreen after another. The team is at breaking point in a nail-biting race against the clock to trap the killer and solve the case.

New evidence points to suicide but, when Boyd and the team exhume Perry Coleman's body, DNA tests reveal some disturbing facts that call this into question.