Thompson v The Queen

In *Thompson v The Queen*, the High Court of Australia considered an appeal by the applicant, Thompson, 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 subjective and objective components of the defence, and whether the jury had been properly instructed on the onus of proof in relation to that defence.

The High Court, comprising Gleeson CJ and Hayne J, found that the trial judge's directions were inadequate. Their Honours explained that for self-defence to be properly considered, the jury must be instructed that they must acquit if they are not satisfied beyond reasonable doubt that the accused did not act in self-defence. This requires a clear explanation of both the accused's subjective belief as to the necessity of using force and the objective reasonableness of that belief in the circumstances. The failure to adequately convey these principles meant that the jury may not have fully understood the legal requirements for establishing self-defence, thereby vitiating the conviction.