Neb. Rev. Stat. § 23-1822

In each instance when the county coroner is given notice in accordance with section 23-1821 , the coroner or coroner's physician shall perform an examination, a test, or an autopsy as he or she may deem necessary to establish, by a reasonable degree of medical certainty, the cause or causes of death and shall thereafter certify the cause or causes of death to the presiding judge of the district court.