Aubrey v The Queen

Aubrey appealed to the High Court of Australia against his conviction for murder. The central dispute concerned the admissibility of certain evidence obtained from Aubrey during police interviews, specifically statements made by Aubrey after he had been cautioned by police.

The High Court was required to determine whether the trial judge had erred in admitting Aubrey's statements into evidence. This involved considering whether the caution administered by the police was sufficient to render the subsequent statements voluntary, particularly in light of Aubrey's intellectual disability and the circumstances of his detention. The court also had to assess whether the admission of the statements had occasioned a miscarriage of justice.

The majority of the High Court, comprising Toohey and McHugh JJ, held that the trial judge had erred in admitting the statements. Their Honours reasoned that while the caution was administered, the circumstances of Aubrey's detention and his intellectual disability meant that the caution was unlikely to have been fully understood or appreciated by him. Consequently, the statements could not be considered voluntary. Kirby J, in dissent, found that the caution was adequate and the statements were admissible. The majority concluded that the admission of the statements had occasioned a miscarriage of justice, and therefore, the conviction could not stand.

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