The appellant was convicted of aggravated assault for allegedly burning her 3½-year-old granddaughter's face on a stove.
At trial, the unsworn child testified against the appellant, and both sides called expert witnesses regarding the burns, the child's memory, and child abuse.
The Supreme Court of Canada ordered a new trial, finding that while the child was properly permitted to testify, the trial judge erred by allowing an expert witness to testify that the child's behaviour indicated long-term abuse and to improperly comment on the child's credibility.
The Court also found errors in the Crown's cross-examination of a defence expert using unproven learned treatises.