23 Pa.C.S. § 6119: Immunity.

(a) General rule.--Law enforcement agencies and their employees, including police officers and sheriffs, shall, except as provided in subsection (b), be immune from civil liability for actions taken in good faith to carry out their duties relating to the seizure and relinquishment of firearms, other weapons and ammunition as provided for in this chapter, except for gross negligence, intentional misconduct or reckless, willful or wanton misconduct.

(b) Exception.--Law enforcement agencies and their employees, including police officers and sheriffs, shall be liable to the lawful owner of confiscated, seized or relinquished firearms in accordance with 18 Pa.C.S. § 6105(f) (relating to persons not to possess, use, manufacture, control, sell or transfer firearms) and shall be liable to the lawful owner of confiscated, seized or relinquished other weapons or ammunition for any loss, damage or substantial decrease in the value of the other weapons or ammunition that is a direct result of a lack of reasonable care by the law enforcement agency or its employees.