Mo. Rev. Stat. § 58.725: Autopsy, when — performed by whom — report filed (certain counties).

In cases in which, in the opinion of the medical examiner, an autopsy is necessary, the autopsy shall be performed by the medical examiner if he is a pathologist or by such competent pathologist as may be authorized and employed by the medical examiner. A detailed description of the findings of the autopsy, and the conclusions drawn therefrom, shall be filed in the office of the medical examiner.