W. Va. Code § 39-3-13
For the purpose of taking such testimony, such clerk shall have authority to summon witnesses and enforce their attendance when desired by any person interested, in like manner as witnesses are compelled to appear before commissioners in chancery; to compel the production before him of any document, paper or book that he may deem pertinent for the purpose of any particular inquiry; and to administer oaths to such witnesses as may be brought before him. Any person who shall wilfully swear falsely before such clerk to any material fact shall be guilty of perjury, and, upon conviction thereof, shall be punished as in other cases of perjury. When the testimony in any case shall have been partly taken by a clerk, and he shall die or his place be otherwise vacated before such testimony is completed, the successor of such clerk may complete the taking of the same with like effect as if it had been completed by the clerk who began to take the same.
W. Va. Code § 39-3-13