Wilcox (defendant) was involved in a burglary during which a person was shot and killed. A court-appointed psychiatrist concluded that Wilcox suffered from various mental conditions, including schizophrenia and organic brain syndrome. Wilcox was treated and found competent to stand trial. Wilcox pled not guilty by reason of insanity and introduced psychiatric testimony evidencing his mental illness, but the court did not permit additional psychiatric testimony to prove a diminished-capacity defense. Further, the court did not provide jury instructions on the theory that Wilcox’s mental condition prevented him from forming the specific intent to commit aggravated murder or aggravated burglary. Wilcox was convicted of the crimes, and he subsequently appealed.