The appellant, a newspaper reporter, wrote an article that breached a publication ban under s. 486(5) of the Criminal Code.
Neither the reporter nor the newspaper knew of the ban.
The trial judge acquitted the reporter as a principal but convicted the newspaper.
On summary conviction appeal, the reporter was convicted as an aider and abettor under s. 21(1) of the Criminal Code based on an objective mens rea standard.
The Court of Appeal allowed the reporter's appeal and restored the acquittal, holding that liability as an aider or abettor under s. 21(1)(b) or (c) requires subjective mens rea, specifically knowledge of the circumstances constituting the offence.