Daniel M'Naghten

Daniel M'Naghten (sometimes spelt McNaughtan or McNaughton; 1813 – 3 May 1865) was a Scottish woodturner who assassinated English civil servant Edward Drummond while suffering from paranoid delusions. Following his trial and its aftermath, his name has been given to the legal test of criminal insanity in England and other common law jurisdictions known as the M'Naghten rules.