W. Va. R. Crim. P. 8

(a) Joinder of offenses. -

(1) Permissive joinder. - Two or more offenses may be charged in the same indictment or information in a separate count for each offense if the offenses charged, whether felonies or misdemeanors or both, are of the same or similar character.

(2) Mandatory joinder. - If two or more offenses are known or should have been known by the exercise of due diligence to the attorney for the state at the time of the commencement of the prosecution and were committed within the same county having jurisdiction and venue of the offenses, all such offenses upon which the attorney for the state elects to proceed shall be prosecuted by separate counts in a single prosecution if they are based on the same act or transaction or on two or more acts or transactions connected together or constituting parts of a common scheme or plan, whether felonies or misdemeanors or both. Any offense required by this rule to be prosecuted by a separate count in a single prosecution cannot be subsequently prosecuted unless waived by the defendant.

(b) Joinder of defendants. - Two or more defendants may be charged in the same indictment or information if they are alleged to have participated in the same act or transaction or in the same series of acts or transactions constituting an offense or offenses. Such defendants may be charged in one or more counts together or separately, and all of the defendants need not be charged in each count.