In November 2003, Graham and Carol Fisher were found murdered at Perch Garage near Wadebridge, Cornwall. The couple had built a quiet life around their petrol station and bungalow on the A39, but a shattered window, a ransacked home and evidence of a violent double shooting left investigators searching for answers…

In January 1999, 79-year-old Constance “Connie” Sheridan and her 56-year-old daughter Janice were found murdered inside their secluded home near Upwell, Norfolk. Surrounded by the dogs they loved, the mother and daughter had lived quietly, until a brutal double murder led the police into the world of dog shows, fingerprints, forensic evidence, and a pale car seen near Pingle Bridge…