plea of insanity

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Noun1.plea of insanity - (criminal law) a plea in which the defendant claims innocence due to mental incompetence at the time
criminal law - the body of law dealing with crimes and their punishment
plea - (law) a defendant's answer by a factual matter (as distinguished from a demurrer)
References in periodicals archive ?
The plea of insanity was rejected as 'fantasy' in 2016 and now again in 2018.
He first claimed not guilty on plea of insanity, but later rescinded the claim and admitted to second degree murder.
Blood-soaked Philip's clothes were shown off in court; then aged 16, he gave a plea of insanity but admitted murder
The man's audacity is unfathomable; we really worry if he later invokes a plea of insanity as a defense in court.
Terming the crime as "cruel, diabolical and revolting" and the one that "shook the conscience of the society," the high court rejected Mane's plea of insanity and upheld the death penalty awarded to him by a sessions court.
This year's regional competition involved a criminal murder case in which the defendant offered a plea of insanity.
Holmes' attorneys are expected to enter a plea of insanity at his trial.
Lianne Smith, 45, faces up to 34 years in prison after a jury in Girona rejected her plea of insanity and found her guilty of murdering daughter Rebecca, five, and 11-month-son Daniel.
Mr Ogg urged them to accept his plea of insanity and said: "A man cannot be held criminally responsible for his actions if his reason is alien.
Ronald Reagan, despite the fact that his plea of insanity was successful.
It is believed that only one person was ever executed at Ruthin - William Hughes of Denbigh, aged 42, hanged on 17 February 1903 for the murder of his wife, after his plea of insanity failed.