A search of the Henthorn home leads investigators to expose one of Harold's biggest secrets. Shott and Grusing, her FBI partner, are confident that Harold murdered Toni, but they must assemble an airtight case with every scrap of evidence they can find. Criminal profiler Bryanna Fox provides additional insights into Harold's background and behavior, leading investigators to worry that Harold and Toni's young daughter, Haley, could also have been in danger.