Brawn v The King

The High Court of Australia heard an appeal by Brawn (the appellant) against a decision of the Court of Appeal of the Supreme Court of South Australia. The dispute concerned the appellant's conviction for sexual offences. Following the trial, the prosecution disclosed that the appellant's father had been charged with similar offences against another child. The appellant argued that this disclosure constituted a miscarriage of justice, entitling him to have his conviction set aside.

The central legal issue before the High Court was whether the Court of Appeal erred in finding that no miscarriage of justice had occurred. Specifically, the High Court considered whether an error or irregularity in a criminal trial must be material to establish a miscarriage of justice, and if so, what the nature of that materiality threshold is. The Court of Appeal had found that while the prosecution breached its common law duty of disclosure, there was no miscarriage of justice because the appellant had not demonstrated that the defence would have been conducted differently had the information been disclosed earlier.

The High Court allowed the appeal, setting aside the order of the Court of Appeal. The Court held that there is a materiality threshold required to establish a miscarriage of justice. However, it found that the Court of Appeal had erred in its application of this principle. The High Court concluded that the appellant's conviction should be set aside and a new trial ordered, indicating that the non-disclosure was sufficiently significant to warrant this outcome.