Donal investigates the motiveless murder of 55-year-old Valerie Graves, who was murdered in her sleep during her stay at a guest house that she was housesitting for friends in West Sussex in December 2013. Despite her family having also been sleeping in the house at the time, her killer managed to enter the property uninterrupted and commit the murder without anyone noticing.
Uitzenddatum: 22 november 2015