Clark v. Arizona
Citation
548 U.S. 735 (2006)
Facts
Stub — to be completed.
Issue
Stub — to be completed.
Holding
Stub — to be completed.
Rule
Due process does not require states to adopt the M’Naghten standard for insanity, and states may channel evidence of mental illness solely to the issue of the affirmative insanity defense rather than allowing it to negate the mens rea element of the offense.
Significance
States have broad latitude to define and limit the insanity defense; Arizona’s modified insanity test (only cognitive incapacity, not volitional incapacity) is constitutional; states may also limit how mental illness evidence is used at trial.