Wednesday January 13, 2021, 11:58 PM play-icon Video report by ITV News Wales and West of England Correspondent Rupert Evelyn The Pembrokeshire Murders has proved to be a compelling watch for millions and it tells the story of a forensic scientist who helped to solve two cold case double murders. Dr Angela Gallop established the link between John Cooper – known as the Bullseye killer – and his victims. The murders took place in the 1980s and Dr Gallop used techniques that would not have been possible at the time of the initial investigation. She told ITV News: “There were some really dramatic moments…it would have been possible to find the tiny amount of blood found on the shorts that John Cooper had at the time, but we couldn’t have analysed it.”