Hinckley was initially held at
Marine Corps Base Quantico, where he met his defense lawyer
Vincent J. Fuller. Hinckley was quickly moved to
Federal Correctional Complex, Butner. For four months, he was interviewed by both prosecution and defense. During his incarceration, he tried to kill himself twice, in May and November 1981, respectively. The trial was chiefly devoted to a battle of the psychiatric experts concerning Hinckley's mental state. For the defense,
William T. Carpenter, who diagnosed Hinckley with
schizophrenia, testified for three days, opining that Hinckley had amalgamated various personalities from fiction and real life—including Travis Bickle (from
Taxi Driver) and
John Lennon. Carpenter concluded that Hinckley could not emotionally appreciate the wrongfulness of his actions because he was consumed by the prospect of a "magical unification with Jodie Foster". David Bear testified that Hinckley's actions followed "the very opposite of logic" and that Hinckley did not exhibit signs of
malingering. and that he was preoccupied with being famous. Johnson said that Hinckley's interest in Foster was no different than any young man's interest in a movie star. The insanity instruction provided to the Hinckley jurors was based on the
American Law Institute's
Model Penal Code: The jury deliberated for a total of 24 hours over the course of four days. On June 21, 1982, Hinckley was found
not guilty by reason of insanity of all his 13 charges.
Aftermath revolver that he bought in Dallas. Behind it is the armored-glass limousine window hit by one of its bullets, on display at the US Secret Service's restricted-access museum, 2022. Soon after his trial, Hinckley wrote that the shooting was "the greatest love offering in the history of the world" and was disappointed that Foster did not reciprocate his love. In 1985, Hinckley's parents wrote
Breaking Points, a book detailing their son's mental condition. Additionally, since Brady's death occurred more than 33 years after the shooting, prosecution of Hinckley was barred under the
year and a day law in effect in the District of Columbia at the time of the shooting.
Effect on insanity defenses Before the Hinckley case, the insanity defense had been used in less than 2% of all American
felony cases and was unsuccessful in almost 75% of those trials. As a consequence of public outcry over the Hinckley verdict, the
United States Congress and a number of states enacted legislation making the insanity defense more restrictive. Congress rejected the MPC test, and by 2006, only 14 states retained it. Eighty percent of insanity-defense reforms between 1978 and 1990 occurred shortly after the Hinckley verdict. For the first time, Congress passed a law stipulating the insanity test to be used in all federal criminal trials, the
Insanity Defense Reform Act of 1984. The IDRA excised the Model Penal Code's volitional element in favor of an exclusively cognitive test, At the state level,
Idaho,
Kansas,
Montana, and
Utah abolished the defense altogether. Hinckley's acquittal led to the popularization of the
"guilty but mentally ill" (GBMI) verdict, typically used when a defendant's mental illness did not result in sufficient impairment to warrant insanity. A defendant receiving a GBMI verdict generally receives an identical sentence to a defendant receiving a guilty verdict, but the designation allows for a medical evaluation and treatment. but this is not the rule in most states. ==Treatment==