They were sure that my father had done this reporter then a clue led to her son the poison is in his jeep . Yes. Reporter so why was she in the Interrogation Room . My life is over. Theyre interrogating her for murder. If you could have seen what they put that girl through. Reporter this deadly case of poison would have a toxic twist. So much of this made me feel crazy. People arent waiting for facts to come out. You feel like all of a sudden, somebody dropped you in the middle of hell and you cant find your way out. Im lester holt and this is dateline. Heres Andrea Canning with poisoned. Reporter she was the kind of doctor who went above and beyond. The patients loved her. They didnt just see her as a doctor. They saw her as a mentor and as a friend. Reporter and as an example at 60 years old, mary yoder, a popular chiropractor, was the picture of health. She was extremely healthy. Shes fit and beautiful. She ran. Oh, triathlons. Triathlons. Reporter energetic, vibrant, until mary the