Ngatayi v The Queen

The High Court of Australia considered an appeal by the applicant, Ngatayi, against his conviction for murder. The applicant had been found guilty of murder by a jury in the Supreme Court of New South Wales and subsequently sentenced to imprisonment for life. The appeal to the High Court concerned the fairness of the trial process and the admissibility of certain evidence.

The central legal issue before the High Court was whether the trial judge had erred in admitting evidence of the applicant's prior convictions. Specifically, the court had to determine if this evidence was relevant to the question of guilt and, if so, whether its prejudicial effect outweighed its probative value, thereby rendering its admission unfair to the applicant. The court also considered whether the summing up by the trial judge adequately directed the jury on the limited use they could make of this evidence.

The High Court, by majority, held that the admission of the prior convictions was prejudicial and that the judge's directions to the jury were insufficient to mitigate this prejudice. The court reasoned that the evidence of prior convictions was not sufficiently probative of the applicant's guilt in the present matter and was likely to have led the jury to infer that the applicant had a propensity to commit crimes of violence, thus unfairly influencing their verdict. The principles of a fair trial require that an accused person be judged on the evidence relating to the offence charged, not on their past record.

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