W. Va. Code § 52-2-7

The grand jury shall inquire of and present all felonies, misdemeanors and violations of penal laws, committed in the jurisdiction of the court wherein they are sworn, except that no presentment shall be made of a matter for which there is no imprisonment, but only a fine, where the fine is limited to an amount not exceeding $10 and the offense is cognizable by a justice of the peace. They shall appoint one of their number as clerk, who shall write down the name of each witness examined by them, and the substance of the evidence given by him and furnish the same to the prosecuting attorney.