R. v. Sullivan
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| R. v. Sullivan | |
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| Case name | R. v. Sullivan |
| Court | Supreme Court of Canada |
| Date decided | 1991 |
| Citations | [1991] 1 S.C.R. 489 |
| Judges | Chief Justice Lamer; Justices La Forest, Sopinka, Cory, Iacobucci, among others |
| Keywords | criminal law, sexual assault, consent, medical evidence |
R. v. Sullivan
R. v. Sullivan was a landmark decision of the Supreme Court of Canada that addressed evidentiary rules and the role of expert opinion in sexual assault trials. The decision involved issues arising from the intersection of criminal procedure, forensic psychiatry, and appellate review, engaging institutions such as the Royal Canadian Mounted Police, provincial Crown attorneys, and university law faculties. The ruling influenced subsequent practice in criminal litigation, appellate jurisprudence, and legal education across Canada.
Background
The litigation context drew on precedents from the Judicial Committee of the Privy Council era, decisions of the Court of Appeal for Ontario, and Supreme Court of Canada rulings such as R. v. Oakes, R. v. Stinchcombe, R. v. Lavallee, R. v. Seaboyer, and R. v. Gayme. Parties included provincial Attorneys General, defence counsel affiliated with bar associations in Toronto and Vancouver, and advocacy groups active in victim services in Ottawa and Halifax. The case emerged against reforms to the Criminal Code enacted by Parliament and debated in committees of the House of Commons of Canada and the Senate of Canada, with commentary from scholars at the University of Toronto Faculty of Law, McGill University Faculty of Law, and Osgoode Hall Law School.
Facts of the Case
The accused, represented by counsel from a provincial legal aid clinic, faced charges under sections of the Criminal Code originally consolidated after debates in the Parliament of Canada and referrals to the Supreme Court of Canada for constitutional questions. The complainant had provided statements to members of the Royal Canadian Mounted Police and testified before a jury in a trial presided over in a courthouse in Toronto. Expert evidence from a psychiatrist affiliated with a hospital linked to University Health Network was tendered, and defence counsel sought to challenge the admissibility of portions of that testimony. The trial judge relied on jurisprudence from the Court of Appeal for Ontario and trial practice guides issued by the Canadian Bar Association.
Legal Issues
Key questions included the admissibility of expert opinion touching on credibility, the scope of permissible opinion evidence at trial, and standards for appellate deference to findings of mixed fact and law. The judicial panel considered competing authorities such as R. v. Mohan, R. v. Lifchus, R. v. W.(D.), and doctrinal treatments appearing in texts by editors at Carswell and commentary in the Supreme Court Law Review. Constitutional dimensions invoking the Canadian Charter of Rights and Freedoms arose in relation to the right to full answer and defence under section 7 and protections under section 11.
Decision and Reasoning
The majority opinion, authored by a Justice with prior service on the Ontario Court of Appeal, held that the challenged expert evidence was inadmissible to the extent it spoke directly to credibility and the ultimate issue of consent. The decision applied the principled approach to hearsay and opinion evidence refined in R. v. Mohan and emphasized judicial gatekeeping consistent with precedents from the Supreme Court of Canada and comparative jurisprudence from the House of Lords and the High Court of Australia. The reasoning invoked forensic standards used in psychiatry at institutions such as St. Michael's Hospital and methodological critiques published in journals associated with McGill-Queen's University Press and the Canadian Medical Association. Concurrences and dissents engaged with standards of appellate review found in Henderson v. R. and contested the applicability of Crown practices outlined by provincial Departments of Justice.
Significance and Impact
The ruling shaped trial practice by clarifying limits on expert testimony that addresses witness credibility, influencing prosecutorial protocols at provincial Crown offices in Ontario, Alberta, and British Columbia. Law reform bodies, including the Law Reform Commission of Canada and provincial Law Commissions, cited the decision in recommendations affecting Criminal Code amendments debated in the House of Commons and in continuing legal education programs at the Canadian Bar Association annual conferences. The decision is taught in clinics and courses at University of British Columbia Faculty of Law, Dalhousie University Schulich School of Law, and University of Ottawa Faculty of Law and features in casebooks edited by scholars affiliated with Queen's University and York University Osgoode Hall.
Subsequent Developments and Related Cases
Subsequent appellate and Supreme Court decisions revisited themes from the case, including rulings such as R. v. Shearing, R. v. D.(D.), and later treatment in R. v. J.-L.J. and R. v. Osolin. Legislative responses considered by committees of the Senate of Canada and reviews by provincial Attorneys General led to updates in Crown policies and training modules used by the Royal Canadian Mounted Police and municipal police services in Toronto and Montreal. Academic analyses continued in law reviews at McGill University, University of Toronto, and University of Alberta, and procedural manuals published by Carswell incorporated the decision into guidance for trial counsel.