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The 'insanity defense' and diminished capacity

Theoretical background: An important distinction: "Not guilty by reason of insanity" versus "diminished capacity"
Related legal issues:

The UNABOM case: the law of evidence and sentencing; admissibility of evidence; the constitutional law of double jeopardy.
The Hinckley case: the assassination attempt of President Reagan
Colin Ferguson - The Long Island Railroad gunman
United States v. Cook, 53 F.3d 29 (9th Cir. 1995) (the Ninth Circuit's interpretation of "diminished capacity")
United States v. Brawner, 471 F.2d 969 (1972) (the federal "insanity defense" standard)
United States v. Winn, 577 F.2d 86 (9th Cir. 1978) (the Ninth Circuit's insanity defense language)
Supreme Court cases on the insanity defense and diminished capacity