N.C. Gen. Stat. § 152-11
All process, both subpoenas and warrants for the arrest of any person or persons, and orders for the summoning of a jury, in case it may appear necessary for such coroner to issue such order, shall be served by the sheriff or other lawful officer of the county in which such dead body is found, and in case it is necessary to subpoena witnesses or to arrest persons in a county other than such county in which the body of the deceased is found, then such coroner may issue his process to any other county in the State, with his official seal attached, and such process shall be served by the sheriff or other lawful officer of the county to which it is directed, but such process shall not be served outside of the county in which such dead body is found unless attested by the official seal of such coroner.
N.C. Gen. Stat. § 152-11