Was a doctor, of course, but not while he was assisting suicides... I think you need to make the distinction between somebody who knows medicine and a medical professional. Both can be equally capable, but one is not bound by the ethics of the medical profession. Anyway, I think it would be common sense to know that you don't need a doctor's training to know which chemicals are lethal and effective enough for suicide. You'd need some training, for sure, but nothing close to several years of medical school.