Powell v The Queen

The appellant, Powell, was convicted of murder in the Supreme Court of Queensland and subsequently appealed to the High Court of Australia. The central dispute concerned the admissibility of certain evidence obtained from the appellant and the fairness of the trial process.

The High Court was required to determine whether the trial judge erred in admitting evidence that the appellant had remained silent when questioned by police after being cautioned. It also had to consider whether the trial judge's directions to the jury regarding the appellant's silence were adequate and whether the overall conduct of the trial had been unfair, thereby vitiating the conviction.

The Court held that the common law rule against adverse inferences from an accused's silence at trial, where such silence is in response to police questioning after a caution, should be maintained. Brennan, Deane and Dawson JJ reasoned that the caution implies that silence will not be used against the accused, and allowing such inferences would undermine this assurance. They further found that the trial judge's directions on this matter were insufficient and that the admission of the evidence, coupled with the inadequate directions, had created a real possibility of prejudice to the appellant, rendering the trial unfair.

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