Two unsolved double murders from the 1980s cast a shadow over the work of the Dyfed Powys police force. In 2006, newly promoted Detective Superintendent Steve Wilkins decided to reopen both cases. Employing pioneering forensic methods, Wilkins and his hand-picked team found microscopic DNA and fibres that potentially linked the murders to a string of burglaries committed in the 1980s and 1990s.