TY - JOUR T1 - Rationality Was Lost on the United States Supreme Court in Its <em>Kahler</em> Decision JF - Journal of the American Academy of Psychiatry and the Law Online JO - J Am Acad Psychiatry Law DO - 10.29158/JAAPL.210054-21 SP - JAAPL.210054-21 AU - Alan R. Felthous Y1 - 2021/12/21 UR - http://jaapl.org/content/early/2021/12/21/JAAPL.210054-21.abstract N2 - In its recent Kahler decision, the U.S. Supreme Court ruled that Kansas’ abolition of the state’s insanity defense was constitutional. It did so by framing the matter as a choice between the state’s mens rea defense and a moral capacity defense, then mischaracterizing the mens rea defense as a type of insanity defense. In analyzing the two approaches, the Court missed the fundamental importance of rationality in criminal mental responsibility, a constitutional requirement for other criminal competencies, and a condition well described in the Court’s Panetti ruling. The Court’s acceptance of the abolition of a special insanity defense is a public policy in the direction of further criminalizing and punishing rather than providing prompt and proper treatment to those with serious mental illness, at a time when increasing modern research demonstrates the success of insanity acquittee dispositions with improved treatment and management resulting in lower rates of relapse and criminal recidivism. ER -