U.S. Supreme Court · 2002
536 U.S. 304 (2002)
The execution of intellectually disabled defendants is cruel and unusual punishment barred by the Eighth Amendment; because their impairments give them "diminished capacities to ... engage in logical reasoning, to control impulses, and to understand the reactions of others," their deficiencies "do not warrant an exemption from criminal sanctions, but they do diminish their personal culpability."
Later courts cite it without significant positive or negative signal.
Treatment last confirmed July 18, 2026. Case-wide subsequent treatment; human-set. Not specific to any one passage.