Avsnitt 11

When a man confesses that a woman is lying dead in his house, police must establish whether she died as a result of an accident or if she was murdered. There is also a look into the Crimewatch archives. Detectives and forensic experts describe how Pembrokeshire killer John Cooper was finally found guilty of murder, decades after he committed his crimes . Advances in forensic technology finally helped police crack these two infamous double murder cases.