McCullagh v The Queen

In *McCullagh v The Queen*, the applicant, McCullagh, appealed to the Full Court of the Supreme Court of South Australia against his conviction for the offence of assault occasioning actual bodily harm. The dispute centred on the admissibility of certain evidence during his trial.

The primary legal issue before the Full 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 issues in the trial and, if so, whether its probative value outweighed its prejudicial effect, pursuant to s 137 of the *Evidence Act 1929* (SA).

Gleeson J, delivering the judgment of the Full Court, reasoned that the prior convictions were not relevant to any issue in the trial. The prosecution had not sought to use the evidence to establish identity, motive, intent, or any other matter that would render it admissible under the general exceptions to the rule against admitting evidence of prior convictions. Consequently, the evidence was inadmissible under s 137 of the *Evidence Act 1929* (SA) because its prejudicial effect far outweighed any potential probative value. The court found that the admission of this evidence had occasioned a miscarriage of justice.

The Full Court allowed the appeal, quashed the conviction, and ordered a new trial.