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Home > Law > Law glossary > Law glossary
diminished responsibility
Last modified: Thu Feb 23 16:37:37 2006
The defence of dimished responsibility is only available to a charge
of murder and, if successful, reduces the conviction to manslaughter.
This defence is widely used because murder has a mandatory
life sentence. To succeed, the defendant must show that, on the balance
of probability, the elements of dimished responsibility are in
place. These are defined in s.2 of the HomicideAct1957:
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at the time of the killing the defendant was suffering
an `abnormality of mind', and
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the abnormality led to the fatal act, and
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the abnormality was such as to substantially reduce the ability of the
defendant to take responsibility for his actions.
In practice it is necessary to get medical evidence in support of such
a claim. Even then the prosecution may seek a ruling of insanity
rather than dimished responsibility because, even though a defendent who is
discharged by reason of insanity is not convicted of anything, he can be
ordered to be detained for psychiatric treatment. A successful plea of
diminished responsibility could result in a short prison sentence, followed
by unsupervised release.
That diminished responsibility exists at all as a defence is probably
because murder carried a mandatory death penalty until 1963.
CriminalLaw
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