R v Parks

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"Ken Parks" redirects here. For the 2002 film, see Ken Park.
R v Parks
Supreme Court of Canada
Full case name Her Majesty The Queen v Kenneth James Parks
Citations [1992] 2 S.C.R. 871
Docket No. 22073
Ruling Appeal Dismissed
Court Membership
Chief Justice Antonio Lamer
Reasons given

R v Parks, [1992] 2 S.C.R. 871 is a leading Supreme Court of Canada decision on the criminal automatism defence.

On an early morning in May 1987, Kenneth Parks drove to the house of his wife's parents. He attacked both of them with a kitchen knife, killing the mother and leaving the father seriously injured. Following the attack, Parks went to a police station and turned himself in.

At trial, Parks argued that he was automatistic and not criminally liable. In his defence, a doctor testified as to his mental state at the time of the murder. From the doctor's evidence, it was determined that the accused was sleepwalking at the time of the incident, and that he was suffering from a disorder of sleep rather than neurological, psychiatric or other illness. Five neurological experts also confirmed that he was sleepwalking during the time of the incident. The jury acquitted Parks.

The issue before the Supreme Court was whether the condition of sleepwalking can be classified as non-insane automatism or should it be classified as "disease of the mind" (i.e. mental disorder automatism) and warrant a verdict of "not guilty for reason of insanity". This distinction is a matter of law and decided by the judge.

Opinion of the Court[edit]

The court upheld the acquittal as the evidence presented a reasonable doubt that Parks acted voluntarily. Chief Justice Antonio Lamer held that the trial judge was correct in his analysis of the evidence and his decision not to characterize sleepwalking as a mental disorder.

La Forest, writing for L'Heureux-Dubé and Gonthier JJ., agreed with Lamer in the characterization of the evidence, but looked further into the public policy of the defence. La Forest noted that the defence of mental disorder provides for a criminal exception which must be weighed against the interest in public safety. The applicability of the defence must focus on the likelihood of recurrence. For a person to be exempt from criminal liability under the "disease of the mind" defence they must be a "continuing danger" to the public and the condition must be an "internal cause" that stems from the accused's emotional or psychological state.

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