Sarah Williams & Katrina Walsh (Season 6 Episode 4 of 10): The story of murderous friends Sarah Williams and Katrina Walsh. Britain's Most Evil Killers airs on Sky Mix at 11:00 PM, Thursday 16 May. The story of murderous friends Sarah Williams and Katrina Walsh
Sarah Williams & Katrina Walsh (Season 6 Episode 4 of 10): The story of murderous friends Sarah Williams and Katrina Walsh. Britain's Most Evil Killers airs on Sky Mix at 11:00 PM, Friday 5 January. The story of murderous friends Sarah Williams and Katrina Walsh