35 Serial Killers the World Wants to Forget

Death's Door (1x3)

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Fostering an image as a kindly medical professional, Dr Shipman had for years cunningly disguised his addiction to drugs and killing his patients. Dorothea Puente appeared to be a mild care home manager. So when police detective John Cabrera knocked on her door it was for information and not the haul of bodies he would eventually find.