The Murder of Betty Guy

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In November 2011, 84-year-old Betty Guy died at her home in Johnston, Pembrokeshire. Her daughter, Penny John, called 999 to say her mother had passed away after a battle with cancer. A doctor certified natural causes, and Betty was cremated four days later. Nobody suspected a thing. Then, four years later, police received a call out of the blue. An ex-partner of Betty's grandson, Barry Rogers, claimed he had admitted to suffocating his grandmother with a pillow. Other former partners told detectives the same story. In this episode, forensic psychologist Kerry Daynes looks at how what should have been the perfect crime unravelled. She also asks what the evidence reveals about the two people…