The appellant was part of a group that entered an apartment and assaulted several occupants, one of whom died from a single stab wound.
The trial judge acquitted the appellant on the basis that the Crown had not proven beyond a reasonable doubt that he inflicted the fatal stab wound.
The Court of Appeal set aside the acquittal and entered a conviction, holding that the trial judge erred in law by failing to assess the appellant's culpability as a co-principal to manslaughter.
The Supreme Court dismissed the appeal, affirming that the stabbing was not a discrete act outside the scope of the group attack.
The Court also clarified that joint/co-principal liability is not automatically eliminated merely because force was applied by only a single perpetrator, and that triers of fact should focus on whether an accused's actions were a significant contributing cause of death.