The appellant appealed a finding of not criminally responsible on account of mental disorder (NCRMD) for charges of assault with a weapon and forcible confinement.
The appellant died before the appeal was decided, but the court exercised its discretion to hear the moot appeal due to its jurisprudential importance.
The court found that the trial judge erred in law by allowing the Crown to raise the NCRMD issue without first making a full finding of guilt, including mens rea, as required by the first precondition in Swain.
The court declined to apply the curative proviso, holding that an appellate court cannot substitute itself for the trial judge to make an initial finding of fact on mens rea.
The court also found the second Swain precondition was not met, as the appellant's evidence of delusions did not put his mental capacity for criminal intent in issue.
Had the appeal not been moot, the court would have allowed the appeal, quashed the NCR finding, and ordered a new trial.