The local Medical Examiner will not do the autopsy. Why?
Medical Examiners and Coroners have specific jurisdictions which cover only certain kinds of cases. These generally involve sudden, violent, or unexpected deaths, or deaths related to accidents or criminal activity. MEs or Coroners are not required to do autopsies on people who have a known disease process, or are over a certain age and die suddenly. Modern ME/Coroners offices are stretched very thin and have to have strict criteria for the cases they agree to accept.