Graat v. The Queen
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Graat v. The Queen, [1982] 2 S.C.R. 819, is the leading case decided by the Supreme Court of Canada on the admissibility of opinion evidence. The Court held that lay persons may give opinion evidence, which is normally reserved only for expert witnesses, where the opinion is so closely infers fact that it is a "compendious statement of fact". The determination is left to the discretion of the trial judge.
[edit] Background
Anthony Graat was pulled over by London, Ontario police. To the officers he appeared intoxicated and so was arrested for impaired driving. At the scene of the arrest Graat complained of chest pains and so was taken to the hospital. Due to the stop at the hostpital the two hour limit in which to get a breathalizer test expired. At trial the only evidence the Crown could lead with was the testimony of the police officers. The defence tried to have the evidence excluded as opinion evidence.
[edit] Opinion of the Court
Justice Dickson, writing for a unanimous court, held that the statements were admissible. Despite their experience, the police officers were not considered experts for determining intoxication and so were limited to giving testimony on observed facts. The trial judge however had discretion to admit certain types of opinion evidence where the distinction between opinion and fact are not clear. Dickson rejects the "ultimate issue" doctine, which prohibits opinion evidence on matters that concern the ultimate legal issue of the trial.
[edit] External links
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