The appellant challenged both the common law rule allowing the Crown to raise insanity over an accused’s objection and the Criminal Code provision requiring automatic detention of an insanity acquittee pending the pleasure of the Lieutenant Governor.
The Court held that the common law rule violated s. 7 because it impermissibly deprived an accused of control over the conduct of the defence, and it reformulated the rule so that the Crown may generally raise insanity only after the trier of fact has otherwise concluded the accused is guilty, or where the accused has put mental capacity in issue.
The Court further held that s. 542(2) was intra vires Parliament’s criminal law power, but violated ss. 7 and 9 of the Charter because it mandated automatic, arbitrary, and indeterminate detention without a hearing and without standards.
The appeal was allowed, a judicial stay of proceedings was entered, and the declaration of invalidity was suspended for six months with interim detention limits.