Kerr v The Queen

Kerr appealed his conviction for murder in the Supreme Court of New South Wales. The appeal was heard by the High Court of Australia, with Justices McHugh and Heydon presiding.

The central legal issue before the High Court was whether the trial judge had erred in law by failing to direct the jury on the defence of provocation, despite the defence not having been specifically raised by the appellant at trial. The appellant argued that the evidence presented at trial was capable of supporting a finding of provocation, and therefore, the jury should have been given the opportunity to consider it.

The High Court considered the principles governing the duty of a trial judge to direct a jury on a particular defence. Their Honours noted that a judge is obliged to direct the jury on a defence if there is some evidence, however slight, that is capable of supporting it, even if the defence has not been formally raised by the accused. In this instance, the Court found that the evidence presented, particularly concerning the deceased's conduct towards the appellant, was capable of giving rise to a defence of provocation. Consequently, the failure to direct the jury on this defence constituted a misdirection in law.

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