Dunn v The Queen

The case of *Dunn v The Queen* concerned an appeal to the High Court of Australia following a conviction for murder. The appellant, Dunn, had been found guilty of murder by a jury in the Supreme Court of Victoria and subsequently appealed to the Court of Appeal of Victoria, which dismissed his appeal. Dunn then sought special leave to appeal to the High Court.

The central legal issue before the High Court was whether the trial judge had erred in law by failing to direct the jury adequately on the defence of provocation. Specifically, the question was whether the judge's summing up had sufficiently explained to the jury that they were required to consider whether the provocation was such as to cause an ordinary person to lose self-control, and if so, whether the appellant had in fact lost self-control.

The High Court, comprising Gleeson CJ and Hayne J, held that the trial judge's directions on provocation were inadequate. Their Honours explained that the defence of provocation requires a two-stage inquiry: first, whether the provocation was sufficient to cause an ordinary person to lose self-control, and second, whether the accused in fact lost self-control. The judge's summing up had failed to clearly articulate this second limb, leaving the jury potentially without a proper understanding of the elements they needed to find to establish the defence. The High Court concluded that this misdirection was a substantial error, leading to a miscarriage of justice.

Special leave to appeal was granted, the appeal was allowed, and the conviction for murder was quashed. The High Court remitted the matter to the Supreme Court of Victoria for a retrial.