Wu v The Queen

The High Court of Australia considered an appeal by Mr Wu against his conviction for murder. The central dispute concerned the admissibility of certain evidence obtained during police investigations and the proper application of the law relating to self-defence.

The High Court was required to determine whether the trial judge had erred in admitting evidence that Mr Wu had made a prior inconsistent statement, and whether the jury had been adequately directed on the issue of self-defence, particularly in relation to the subjective and objective elements of that defence. The Court also considered whether the cumulative effect of any errors amounted to a miscarriage of justice.

The Court held that the admission of the prior inconsistent statement was not an error, as it was relevant to Mr Wu's credibility. However, the majority found that the directions given to the jury on self-defence were inadequate. Specifically, the directions failed to clearly articulate that the jury must consider the circumstances as Mr Wu perceived them, including any mistaken beliefs he held, when assessing whether his response was one that a reasonable person might have made in those circumstances. The legal principle applied was that a person is entitled to rely on self-defence if they honestly and genuinely believed that it was necessary to use force to defend themselves, even if that belief was mistaken, provided that the force used was not excessive in the circumstances as they believed them to be.

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