R. v. Llorenz

R. v. Llorenz

Majority held that the psychiatrist's extensive use of a 24-factor checklist and statements about internal consistency conveyed an oath-helping opinion that the complainant was truthful, the disclaimers were insufficient, and the trial judge failed to instruct the jury to avoid using that evidence to bolster...

Source-derived case information.

Citation
C32783
Parties
Appellant: Hugo Gayetano Llorenz; Respondent: Her Majesty the Queen
Court
Court of Appeal for Ontario
Jurisdiction
Canada
Judgment Date
1 June 2000
Procedural Posture
Criminal / Appeal From Conviction and Sentence
Outcome
Appeal allowed; convictions set aside; new trial ordered
Legal Topics
Oath Helping, Expert Evidence, Jury Instructions, Sexual Assault, Delayed Disclosure, Psychiatric Diagnosis, Reliability of Methodology
Source Language
en
Criminal Law Evidence Appeal Oath Helping Expert Evidence Jury Instructions Sexual Assault Delayed Disclosure +2 more

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Summary, issues, holding and outcome

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Parties

Hugo Gayetano Llorenz

Appellant

Her Majesty the Queen

Respondent

Procedural Posture

Criminal / Appeal From Conviction and Sentence

  1. 1 Admissibility of expert psychiatric evidence conveying belief in complainant (oath-helping)
  2. 2 Adequacy of trial judge's jury instructions limiting use of expert evidence
  3. 3 Reliability and scientific foundation of the 24-factor checklist used by expert

Ratio Decidendi

Majority held that the psychiatrist's extensive use of a 24-factor checklist and statements about internal consistency conveyed an oath-helping opinion that the complainant was truthful, the disclaimers were insufficient, and the trial judge failed to instruct the jury to avoid using that evidence to bolster credibility; the prejudicial effect outweighed probative value and a new trial was ordered.

Court Disposition

Appeal allowed; convictions set aside; new trial ordered

Orders

  • Convictions set aside
  • New trial ordered