Heron v The Queen

Heron 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 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 was such that it ought to have been excluded in the interests of preventing unfairness to the appellant, notwithstanding its potential relevance to the prosecution's case. This involved an assessment of the voluntariness of the confession and the overall fairness of the police questioning process.

The High Court ultimately held that the statements and confession were improperly obtained. The majority reasoned that the police had engaged in conduct that was oppressive and unfair, leading to the involuntary nature of the confession. They applied the principle that evidence obtained in circumstances that render it unfair to the accused should be excluded, even if it is relevant. Consequently, the Court found that the admission of this evidence at trial had occasioned a miscarriage of justice. The appeal was allowed, the conviction was quashed, and a new trial was ordered.