Complex sentence: The Court upheld Arizona's restriction of admissible mental health evidence only to the issue of insanity and not to show that the defendant did not possess the required mental intent level necessary to satisfy an element of the crime.
Split into simpler sentences: The Court upheld Arizona's restriction of admissible mental health evidence only to the issue of insanity. Arizona does not allow mental health evidence to show that the defendant did not possess the required mental intent level necessary to satisfy an element of the crime.