(a) The Attorney General may allow, consistent with the provisions of this section, an investigator to carry a concealed firearm while performing his or her official duties.

(b) An investigator employed by the Attorney General may carry a concealed firearm approved by the Attorney General solely for purposes of defense of self or others if the investigator has:

(1) Obtained the written authorization by the Attorney General;

(2) Been determined not to be prohibited from possessing a firearm under state or federal law;

(3) Obtained and maintains a concealed handgun license pursuant to §61-7-1 et seq. of this code; and

(4) Successfully completed a firearms training and certification program equivalent to that provided to officers attending the entry level law-enforcement certification course provided at the West Virginia State Police Academy. The investigator must thereafter successfully complete an annual firearms qualification counsel equivalent to that required of certified law-enforcement officers as established by legislative rule. The Attorney General may reimburse the investigator for the cost of the training and requalification.

(c) Neither the state, a political subdivision, an agency nor an employee of the state acting in an official capacity, may be held personally liable for an act of an investigator employed by the Attorney General if the act or omission was done in good faith while the investigator was performing official duties or responsibilities under the office of the Attorney General.