Sec. 3. In all cases in which the defense of insanity is interposed, the jury (or the court if tried by it) shall find whether the defendant is: (1) guilty; (2) not guilty; (3) not responsible by reason of insanity at the time of the crime; or (4) guilty but mentally ill at the time of the crime. As added by Acts 1981, P.L.298, SEC.5.