Arkansas Code Title 5. Criminal Offenses § 5-2-312. Lack of criminal responsibility--Affirmative defense

(a)(1) It is an affirmative defense to a prosecution that at the time the defendant engaged in the conduct charged he or she lacked criminal responsibility.

(2) When the affirmative defense of lack of criminal responsibility is presented to a jury, prior to deliberations the jury shall be instructed regarding the disposition of a defendant acquitted due to the defendant's lack of criminal responsibility as described under § 5-2-314.