Dr Edward Pritchard

S1, E6: To this day theres no way of knowing exactly what drove Dr Edward Pritchard to murder his doting wife and motherinlaw Not at all a lsquospurofthemoment act of madness Pritchard cruelly poisoned his wife to death over a long period of time Concerned about her daughters persistent illhealth Mrs Pritchards mother moved into the household to help as best she could But her stay there didnt last long