MacPhee v The Queen

The High Court of Australia considered an appeal by the applicant, MacPhee, 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 the applicant had made a prior inconsistent statement. Further, the Court had to consider whether the jury had been adequately and correctly directed on the issue of self-defence, particularly in relation to the applicant's subjective belief as to the necessity of using force.

The Court held that the admission of the prior inconsistent statement was an error, as it had been obtained in circumstances that rendered it inadmissible under the relevant evidentiary rules. Regarding self-defence, the Court reiterated the established principles that the defence requires an honest and reasonable belief that the use of force was necessary to defend oneself. The jury's verdict was quashed due to the cumulative effect of the evidentiary error and the potentially misleading directions on self-defence.

Consequently, the High Court ordered that the conviction be set aside and that a new trial be held.