The appellant and two co-accused pleaded guilty to attempted robbery while armed with a shotgun.
They were acquitted at trial of a second charge of using a firearm while attempting to commit an indictable offence, based on the rule against multiple convictions (the Kienapple principle).
The Court of Appeal reversed the acquittal.
On appeal to the Supreme Court of Canada, the appellant argued he did not personally use the firearm and that the Kienapple principle barred the second conviction.
The Supreme Court dismissed the appeal, holding that section 21 of the Criminal Code applies to make a party liable under section 83, and that Parliament clearly intended section 83 to create a distinct offence with consecutive sentencing, thereby ousting the Kienapple principle.