Any employee of the medical services administration and any other state employee who has the authority to investigate and bring charges against doctors or providers of health care relating to medical payments and cases of alleged fraud or abuse of the Medicaid program shall be relieved and exempt from civil liability arising from said investigation or charges so long as such investigation and charges have been made in good faith without malice and on the basis of facts reasonably known or reasonably believed.
Ala. Code § 6-5-334 (1975)