Any person who, without authority and with the intention of depriving the public library of the ownership of such property, willfully conceals a book or other public library property, while still on the premises of such public library, or willfully or without authority removes any book or other property from any public library shall be guilty of a misdemeanor; provided, however, that, if the replacement cost of the public library property is less than $25.00, the punishment shall be a fine of not more than $250.00. Proof of the willful concealment of any book or other public library property while still on the premises of such public library shall be prima-facie evidence of intent to violate this Code section. (Code 1981, § 20-5-54, enacted by Ga. L. 1984, p. 1005, § 1; Ga. L. 1985, p. 149, § 20.) 20-5-55. Immunity of library agents and employees from civil actions arising from part. An agent or employee of a public library or of any department or office of the state or local government causing the arrest of any person pursuant to the provisions of this part shall not be held civilly liable for unlawful detention, slander, malicious prosecution, false imprisonment, false arrest, or assault and battery of the person so arrested unless excessive or unreasonable force is used, whether such arrest takes place on the premises by such agent or employee; provided, however, that, in causing the arrest of such person, the public library or agent or employee of the public library had at the time of such arrest probable cause to believe that the person committed willful theft or concealment of books or other library property. (Code 1981, § 20-5-55, enacted by Ga. L. 1984, p. 1005, § 1.) 411 20-5-60