W. Va. Code § 44-2-15

Nothing in this article contained shall be construed to prevent any personal representative, when he shall think it necessary, from commencing any action or suit against any person, or from prosecuting to final judgment or decree any action or suit commenced by the deceased in his lifetime, if the cause of such action or suit survives, for the recovery of any debt or claim, or from having execution on any judgment or decree. The defendant in any such action or suit shall, notwithstanding he may have already filed his claim before a fiduciary commissioner, set off any claim he may have against the deceased, if proper to be allowed as a setoff; and if final judgment or decree shall be rendered in favor of the defendant, the same shall be certified by the clerk of the court rendering it to the fiduciary commissioner before whom the estate of the deceased is pending, and the amount thereof shall be allowed in the same manner as other claims against such estate filed and proved before the fiduciary commissioner.