S1, E2: With the suspects under attack, Karen's case becomes a live investigation overnight. But is Ziggy's death a revenge killing, or is Rosie's killer trying to bury the truth? In 1996, the recovery of an abandoned car leads to an arrest, but with a lack of evidence, the investigation flounders-until a potential eyewitness brings DI Maclennan new hope. In the present, Karen makes a shocking discovery.