S1, E2: Dawson discovers a newspaper item about two missing boys thirty years previously and DI Burns and Dawson break the news to one of the boys mother who identifies effects found with the skeleton as her son William. Chief Superintendent Coulson (revealed as Constable Coulson's father after a station inspection), who was a Sergeant at the time of the boys going missing, arrested a man for their murders and with little evidence and no bodies had the man committed to an asylum where he subsequently killed himself. DI Burns is still searching for a second skeleton. A second woman is attacked in the park but Sergeant Fenton dismisses the victim as she is a known prostitute. Dawson sees this as evidence that the locked up Palmer is innocent and risks her career by going to a West Indian club for information, only for Fenton to find her there.