An officer or person employed in keeping, taking care of, or guarding the State prison or the prisoners therein, who aids or voluntarily suffers the escape of a prisoner, shall be imprisoned not more than 20 years. Jailers and officers, other than those employed in keeping, taking care of, or guarding the State prison or prisoners therein, who voluntarily suffer a prisoner in their custody, upon conviction or upon a criminal charge, to escape, shall be imprisoned not more than five years or fined not more than $1,000.00, or both. (Amended 1971, No. 199 (Adj. Sess.), § 15; 1981, No. 223 (Adj. Sess.), § 23.)