The appellants, Ting Lin and Shuhao Shi, appealed their convictions for unlawful possession of a Class A precursor (GBL) for producing a controlled substance (GHB) and unlawfully possessing ketamine for trafficking.
They also sought leave to appeal their sentences of six years imprisonment.
The primary ground of appeal was the trial judge's alleged error in failing to instruct the jury on the defence of honest but mistaken belief that their activities were authorized.
The Court of Appeal dismissed the appeals, holding that the Crown is not required to prove an accused's knowledge that their possession was unauthorized, as this would amount to proving knowledge of the law, contrary to s. 19 of the Criminal Code and s. 48(2) of the Controlled Drugs and Substances Act.
The court found no air of reality to the mistake of fact defence based on the evidence.
Leave to appeal sentences was granted, but the appeals were dismissed as the sentences were not demonstrably unfit.