Milne v The Queen

The High Court of Australia considered an appeal by Mr. Milne against his conviction for murder. The dispute arose from Mr. Milne's assertion that he had acted in self-defence when he killed the deceased. The central question before the High Court was whether the trial judge had adequately directed the jury on the issue of self-defence, particularly concerning the subjective and objective elements of that defence.

The High Court was required to determine whether the jury directions given at trial were sufficient to ensure the jury understood the onus of proof in relation to self-defence, and whether the directions adequately explained the distinction between the subjective belief of the accused and the objective reasonableness of their actions in the circumstances. Specifically, the court examined whether the jury had been properly instructed that if they entertained a reasonable doubt about the elements of self-defence, they must acquit the appellant.

The High Court reasoned that a proper direction on self-defence requires the jury to be instructed that the accused bears an evidentiary burden to raise the defence, but the prosecution bears the legal burden of disproving it beyond reasonable doubt. The court emphasised that the jury must be directed to consider the accused's subjective belief as to the need for force and the amount of force used, and then to assess whether that belief was objectively reasonable in the circumstances as the accused perceived them. The court found that the directions given at trial failed to adequately convey these principles, leading to a potential miscarriage of justice.

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