Which famous case prompted shifting the burden of proof of insanity from prosecution to defense?

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The Hinckley case, in which John Hinckley Jr. attempted to assassinate President Ronald Reagan in 1981, prompted a change in the burden of proof for insanity. Prior to this case, the burden was on the prosecution to prove that the defendant was sane beyond a reasonable doubt. However, following Hinckley's acquittal by reason of insanity, many states and the federal government shifted the burden to the defense to prove insanity by clear and convincing evidence.

Which Famous Case Prompted Shifting the Burden of Proof of Insanity