McKenzie v The Queen

McKenzie appealed to the High Court of Australia against his conviction for murder. The central dispute concerned the admissibility of certain evidence obtained from the appellant, specifically statements made by him to police and a confession. The High Court was required to determine whether these statements and confession were improperly obtained, thereby rendering them inadmissible under the common law, and if so, whether their admission had occasioned a miscarriage of justice.

The legal issues before the High Court revolved around the application of the common law exclusionary rule concerning improperly or illegally obtained evidence. Specifically, the Court had to consider whether the police conduct in obtaining the statements and confession from McKenzie was such that it ought to have been excluded in the interests of preventing unfairness to the accused or upholding the proper administration of justice. This involved an assessment of the voluntariness of the confession and the overall fairness of the police questioning.

Gummow and Kirby JJ, in their joint judgment, affirmed the principles governing the exclusion of improperly obtained evidence. They reiterated that while the law does not automatically exclude such evidence, a judge has a discretion to exclude it if its admission would be unfair to the accused or would otherwise be contrary to public policy. In this instance, their Honours found that the statements and confession were not improperly obtained, and therefore, the trial judge had not erred in admitting them. The appeal was dismissed.