Did John Hinckley break the law by shooting Ronald Reagan, yes. Was he guilty of breaking the law, NO !!!! To be able to be convicted of breaking a law, one must have criminal intent. Lacking such intent, it doesn't make a difference if the law was broken or not, a conviction for breaking it can't be had. So far two US presidents have been impeached. None have been convicted, so you could argue, what was the point? Yes they were impeached, but that means nothing..