Suspects

Martha’s neighbor Jonathan Moxton is found in his home bound and gagged, with serious head injuries. The prime suspect appears to be the man who found him, Saul Hammond, a paranoid schizophrenic. But as the team uncovers more about Jonathan’s complicated life, the case becomes personal for Jack, clouding his judgment.

The body of a student turns up with injuries that suggest the killer is the same person who attacked Moxton. Charlie notices that the student’s sister is on edge during questioning, while Jack continues his pursuit of Saul, who begins doubting his own innocence as his mental illness worsens.

When amateur pedophile hunter Scott Freeman is attacked, Martha and her team think one of his targets may be the culprit. Jack knew Freeman and his daughter, Rose, a meth user who was raped eight years earlier. As the detectives dig deeper into the investigation, they notice potential connections between the crimes may be one and the same.

After Edward Shaffer’s violent death, the detectives turn their attention to Shaffer’s widow, Tamsin. Could she have remained unaware of her husband’s activities? Then the team races to save a young boy after Charlie finds a thumb drive showing several men abusing him.