MacAlister v The Queen

The High Court of Australia considered an appeal by the applicant, MacAlister, against his conviction for murder. The applicant had been found guilty of murder by a jury in the Supreme Court of Queensland and subsequently appealed to the Court of Criminal Appeal of Queensland, which dismissed his appeal. The central dispute revolved around the admissibility of certain evidence and the directions given to the jury by the trial judge.

The High Court was required to determine whether the trial judge had erred in admitting evidence of the applicant's prior convictions and whether the judge's summing up to the jury adequately addressed the issue of self-defence. Specifically, the court had to consider the application of the *Evidence Act 1977* (Qld) concerning the admissibility of evidence of a person's character or previous convictions, and whether the jury had been properly instructed on the onus of proof in relation to self-defence.

The Court held that the admission of evidence of the applicant's prior convictions was prejudicial and that the trial judge had failed to give a sufficiently clear direction to the jury regarding the limited circumstances in which such evidence might be considered. Furthermore, the Court found that the summing up on self-defence was inadequate, as it did not sufficiently explain that the onus of proof for self-defence lay on the Crown once evidence raising that defence had been adduced. The principles applied concerned the fair trial rights of an accused and the proper application of evidence and criminal law principles.

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