Malho v State of Western Australia

The High Court of Australia heard an appeal from the Supreme Court of Western Australia concerning the conviction of Mr Malho for the offence of aggravated robbery. The dispute arose from an incident where Mr Malho was alleged to have robbed a service station, and the central issue on appeal was whether the trial judge had erred in admitting evidence of Mr Malho's prior convictions.

The High Court was required to determine whether the evidence of Mr Malho's previous convictions for similar offences was improperly admitted at his trial, thereby prejudicing his defence. Specifically, the court considered whether the evidence was admissible under the exceptions to the general rule against admitting evidence of prior convictions, such as for the purpose of showing a system or pattern of conduct, or for its relevance to an issue in dispute.

The High Court held that the admission of the evidence of prior convictions was an error. The court reasoned that the evidence was not sufficiently relevant to any issue in dispute in the current trial to outweigh its prejudicial effect. The prior convictions did not establish a unique or striking similarity that would demonstrate a system or pattern of conduct relevant to the present charge. Consequently, the admission of this evidence was found to have deprived Mr Malho of a fair trial.

The High Court allowed the appeal, quashed the conviction, and remitted the matter to the Supreme Court of Western Australia for a retrial.