Sanders v. State
Supreme Court of Mississippi
63 So. 3d 497 (2011)
Keir Sanders (defendant) shot and killed his grandfather and shot his grandmother, who survived long enough to identify him before dying months later; Sanders then evaded capture for roughly twenty years using multiple aliases. At trial, two defense-aligned experts testified Sanders had schizoaffective disorder and, though he understood the nature of his actions, did not know they were wrong, while a third expert testified Sanders did know his conduct was wrong, pointing to his calculated behavior -- unplugging the phone, fleeing, and evading capture for decades. The jury found Sanders not guilty by reason of insanity for the grandfather's murder but guilty of the grandmother's murder, and Sanders appealed.
Whether a defendant's history of mental illness automatically satisfies the elements of the M'Naghten test for insanity.