It shall be the duty of the coroner or the deputy coroner of any county in this Commonwealth, in all cases where death is sudden or violent or is of a suspicious nature and character, to cause a careful investigation of the facts concerning said death to be made, to ascertain whether the death was due to other than natural causes, and to make or cause to be made such an autopsy as the facts of the case may demand.
16 P.S. § 9521