W. Va. Code § 16B-3-19
(a) The governing board of a hospital licensed under §16B-3-2 of this code may establish a hospital police department and appoint qualified individuals to serve as hospital police officers upon any premises owned or leased by the hospital and under the jurisdiction of the governing board, subject to the conditions and restrictions established in this section.
(3) Before performing duties as a hospital police officer in any county, a person shall qualify as is required of county police officers by:
(c) It is the duty of a hospital police officer to preserve law and order:
(2) On any street, road, or thoroughfare, except controlled access highways, immediately adjacent to or passing through the premises under the jurisdiction of the governing board, to which the officer is assigned by the chief executive officer or his or her designee: Provided, That a hospital police officer may only enforce the provisions of §17C-1-1 et seq. of this code upon request of a local law-enforcement agency.
(E) Hospital police officers may assist a local law-enforcement agency on public highways. The assistance may be provided to control traffic in and around premises owned by the state or political subdivision when:
(g) A hospital police officer shall not be subject to civil or criminal liability unless one of the following applies: