Davidson v The Queen

Davidson 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, which the appellant argued was obtained in contravention of his rights.

The High Court was required to determine whether the evidence, specifically statements made by the appellant to police, was unlawfully obtained and, if so, whether it should have been excluded from admission at trial. This involved considering the application of common law principles governing the admissibility of evidence obtained in breach of an accused's rights, and the discretion of the trial judge to exclude such evidence.

The Court affirmed that the common law grants a judge a discretion to exclude evidence if its admission would be unfair to the accused, even if lawfully obtained. However, where evidence is unlawfully obtained, the discretion to exclude it is broader. The Court held that the statements made by the appellant were obtained in circumstances that breached his rights, and that the trial judge had erred in admitting them. The High Court found that the unfairness to the appellant in admitting the statements outweighed any probative value they might have had, and that the admission of the evidence had led to a miscarriage of justice.

The appeal was allowed, the conviction was quashed, and a new trial was ordered.