Lang v The Queen

The case of *Lang v The Queen* concerned an appeal to the High Court of Australia by the applicant, Lang, against his conviction for murder. The dispute arose from the applicant's assertion that the trial judge had erred in law by failing to direct the jury adequately on the issue of self-defence.

The central legal issue before the High Court was whether the trial judge's summing up to the jury sufficiently explained the elements of self-defence, particularly in relation to the applicant's subjective belief as to the necessity of using force and the objective reasonableness of that belief. The court was required to consider whether the jury had been properly instructed on the onus of proof in relation to self-defence, given the applicant had raised the issue.

Gleeson J, delivering the judgment of the High Court, held that the trial judge's directions were inadequate. His Honour explained that for a jury to properly consider self-defence, they must be instructed that the defence is established if the accused genuinely believed that the use of force was necessary to defend themselves, and that this belief was based on reasonable grounds. The judge emphasised that the reasonableness of the belief is an objective question, but it is informed by the subjective circumstances as perceived by the accused. The court found that the summing up had not clearly articulated this dual test, potentially leading the jury to apply an incorrect standard when assessing the applicant's actions.

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