Dr. Sherah VanLaerhoven

The appellant was convicted of first degree murder and aggravated sexual assault in the death of a 29-year-old woman found naked in a wooded park in Guelph.

The Crown's case was entirely circumstantial, relying on DNA evidence linking the appellant to the deceased, forensic entomology evidence establishing time of death, and toxicology evidence showing cocaine in the deceased's blood.

The trial judge admitted evidence of a subsequent assault by the appellant on another sex worker (the "Barrie incident") to establish motive and rebut innocent association.

The appellant appealed on three grounds: admissibility of the Barrie incident evidence, unreasonableness of the verdict on causation and fault elements, and adequacy of jury instructions.

The Court of Appeal allowed the appeal, finding the Barrie incident evidence was wrongfully admitted and that the jury instructions on the fault element in murder were deficient.

On a ministerial review reference treated as a conviction appeal, the court admitted fresh forensic pathology and archival evidence undermining the reliability of the original time-of-death evidence that had been central to the Crown’s theory of exclusive opportunity.

Applying the fresh evidence framework, the court held that the conviction, as affirmed on the earlier reference, could no longer stand and amounted to a miscarriage of justice.

At the remedial stage, the court undertook an extensive review of the historical record, expert evidence, archival material, and the practical impossibility of a retrial.

Although an acquittal was not the only conceivable verdict, the court concluded that an acquittal was clearly the more likely result at a hypothetical new trial and entered that remedy.