John Blake Talking with Psychopaths and Savages Guilty but Insane.

The plea of insanity in criminal cases can be traced back at least to the Babylonian Code of Hammurabi, which dates from 1755-1759 BC. It is a complicated defence, and its origins in modern law lie with the 'M'Naghten Rules' of 1843, formulated by British judges as a jury instruction in cases where a plea of insanity had been entered. Daniel M'Naghten shot and killed one Edward Drummond, believ[Bokinfo].