West Virginia Code
Article 10. Cooperation Between Law-Enforcement Agencies
§15-10-6. Transportation of Out-of-State Prisoners; Authority of Foreign Law-Enforcement Officers

(a) Duly authorized law enforcement officers of the United States, the District of Columbia and other states or political subdivisions thereof who are transporting prisoners through this state, delivering prisoners to this state or taking custody of a person in this state for transport to another jurisdiction are deemed to have lawful custody of said prisoner while in this state.
(b) Given that duly authorized officers of other jurisdictions often have a need to travel through or to this state with prisoners for short durations of time, such as for medical treatment, the purpose of this section is to clarify the authority and jurisdiction of those officers of the United States, the District of Columbia and other states while having custody of a prisoner during the time they are in West Virginia.