The accused was charged with importing cocaine after returning to Canada from Jamaica with four tins containing the drug.
The accused admitted to importing the tins but claimed she did not know they contained cocaine, believing she was transporting non-drug items for a friend.
The defence sought to introduce expert psychological evidence regarding the accused's intellectual capacity to support her lack of knowledge, which the court ruled inadmissible as unnecessary for assessing credibility.
Applying the W.(D.) framework, the court found the accused's testimony raised a reasonable doubt about her knowledge of the drugs.
The accused was acquitted.