Ala. Code § 45-37-123.31: Liability.

The system, the pension board and each of its individual members, and employees of the system, when acting within the scope of its or their official capacity, shall be immune from civil liability and not subject to legal claims for damages by any individual, member, designated beneficiary or other beneficiary, or entity, directly or by way of contribution, for any decision, act, or omission resulting in damage or injury unless the decision, act, or omission was caused by willful and wanton conduct, grossly negligent conduct, gross malfeasance, or gross misfeasance. For purposes of this section, “official capacity” means any decision, act, or omission taken by the pension board or its individual members to further the purpose for which the system is established.