Daniel M'Naghten

Standard Name: M'Naghten, Daniel

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Timeline

20 January 1843: Daniel M'Naghten shot and mortally wounded...

National or international item

20 January 1843

Daniel M'Naghten shot and mortally wounded the private secretary of Sir Robert Peel , the Prime Minister: his trial for murder changed British legislation on pleas of insanity.

After March 1843: Following a controversial trial, judges for...

National or international item

After March 1843

Following a controversial trial, judges for the House of Lords formalized the M'Naghten Rules, aimed at regularizing legal procedure for prosecuting defendants showing no criminal intent by virtue of defect of reason.

3 March 1843: The trial opened of Daniel M'Naghten for...

Building item

3 March 1843

The trial opened of Daniel M'Naghten for the murder of Sir Robert Peel 's private secretary; his counsel pleaded insanity and consequent lack of self-control.

Early 1843 to 1907: In the seventy-three years following the...

National or international item

Early 1843 to 1907

In the seventy-three years following the establishment of the M'Naghten Rules, the number of accused murderers acquitted by the insanity plea, or found unfit to plead, rose from 10% of all cases to 31%.

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