Connecticut
How Durham v. United States applies in Connecticut: state-specific rules, key cases, and bar exam notes for Criminal Law.
Connecticut law has historically favored a narrower interpretation of the insanity defense compared to the flexible approach seen in Durham v. United States. The state requires defendants to prove that, due to a mental disease, they lacked substantial capacity to appreciate the criminality of their conduct or to conform their conduct to the law.
In Connecticut, under General Statutes § 53a-13, a defendant can be excused from criminal liability if, at the time of the conduct, the defendant, due to mental disease or defect, lacked substantial capacity to appreciate the wrongfulness of their conduct or to conform their conduct to the requirements of the law.
The court ruled that the defendant must provide substantial proof of mental illness that significantly impaired their ability to understand the criminal nature of their actions.
The ruling clarified that the cognitive standard for insanity resides primarily on whether the defendant could distinguish right from wrong at the time of the offense.
The court emphasized that mere mental illness does not automatically entitle a defendant to an insanity excuse without proving substantial impairment.
Unlike the federal standard set forth in Durham, which allowed for broader definitions of insanity, Connecticut applies a more stringent assessment focused on substantial capacity. This distinction means that Connecticut courts may require stronger evidence of a defendant's mental state than what might be required under the federal approach.
The principles from Durham may appear in the context of insanity defenses on the Connecticut bar exam, emphasizing the distinction between federal and state standards.