In a criminal appeal arising from a brutal home invasion assault on an elderly victim, one appellant challenged his convictions on the basis of deficient jury instructions on party liability under s. 21(2) of the Criminal Code, while the other pursued only a sentence appeal.
The court held that the charge on common unlawful purpose was incomplete and misleading because it failed to explain the required elements of agreement, offence, and knowledge, and failed to instruct that the incidental offence had to be different from the original unlawful purpose.
The repeated deficiency in the recharge to the jury compounded the error.
The curative proviso did not apply because the evidence was not so overwhelming that a properly instructed jury would necessarily have convicted.
The conviction appeal was allowed and a new trial ordered for one appellant; leave to appeal sentence was granted to the other appellant, but the sentence appeal was dismissed.