W. Va. Code § 62-1-8

If the offense is to be presented for indictment, the preliminary examination shall be conducted by a justice of the county in which the offense was committed within a reasonable time after the defendant is arrested, unless the defendant waives examination. The defendant shall not be called upon to plead. Witnesses shall be examined and evidence introduced for the state under the rules of evidence prevailing in criminal trials generally. The defendant or his attorney may cross-examine witnesses against him and may introduce evidence in his own behalf. On motion of either the state or the defendant, witnesses shall be separated and not permitted in the hearing room except when called to testify. If the defendant waives preliminary examination or if, after hearing, it appears from the evidence that there is probable cause to believe that an offense has been committed and that the defendant has committed it, the justice shall forthwith hold him to answer in the court having jurisdiction to try criminal cases. If the evidence does not establish probable cause, the defendant shall be discharged. After concluding the proceeding the justice shall transmit forthwith to the clerk of the court to which the defendant is held to answer all papers in the proceeding and any bail taken by him