Dusky v. United States
, 362 U.S. 402 (1960), is a US Supreme Court case about competency to stand trial. The case stands for the proposition that “due process does not permit the trial of persons who do not possess a rational and factual understanding of the proceedings, and who lack the ability to cooperate with their attorneys with a reasonable degree of rational understanding.” Dusky suffered from long‐term mental health issues. He was charged in a federal case with transporting a kidnap victim, a girl, across state lines. At his first trial, Dusky unsuccessfully tried to claim incompetency to stand trial, and was then convicted over his insanity defense and sentenced to 45 years. This conviction was affirmed by the Circuit Court of Appeals. The Supreme Court then reversed and remanded to the trial court for an appropriate competency hearing, setting forth briefly the now famous standard of review. Competency matters have since arisen in the Supreme Court a number of times, and the
Dusky
standard has repeatedly been reaffirmed and expanded.