Clark V. Arizona Case Brief

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Clark v. Arizona
548 U.S. 735 (2006)

Facts: During a traffic stop involving Clark, Clark pulled out a gun and killed the law enforcement officer. Subsequently, Clark was charged with murder in the first degree. Although Clark admitted to shooting the officer, he claimed that he was not aware of what he was doing at the time, nor did he intend to shoot the law enforcement officer due to his paranoid schizophrenia. The court ruled that Clark was not allowed to use any evidence that showed he was insane for the purpose of disproving his criminal responsibility. Because of this ruling, no psychiatric evidence was divulged thus no longer being able to prove the lack of mens rea. Clark was convicted during trial naming Arizona case law as support for this decision.
Issue(s): Does the sates exclusion of evidence involving a defendant’s mental state, violate their due process? Holding: No, the state's exclusion of evidence involving a defendant's mental state did not violate due process.
Reasoning: The court states that the exclusion of evidence is allowed, only if the probative value …show more content…

Holding: Yes, it is required for any and all evidence that may lead to a heightened penalty is provided to the jury for review and be proven beyond a reasonable doubt.
Reasoning: It was found that it is unconstitutional for the jury to not be provided the evidence and/or findings that could potentially increase the penalties that a defendant faces. The Court found that the Due Process Clause does, in fact, require that any evidence proven beyond a reasonable doubt must be submitted. This ensures ""the moral force of the criminal law not be diluted by a standard of proof that leaves people in doubt whether innocent men are being condemned."
Vacco v. Quill
521 U.S. 793

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