Ninyette v The State of Western Australia

The appellant, Ninyette, was convicted by a jury in the Magistrates' Court of Western Australia of one count of doing grievous bodily harm. The appellant appealed against the conviction to the Supreme Court of Western Australia. The sole ground of appeal was the admissibility of evidence of a prior conviction for grievous bodily harm. The appellant argued that the evidence did not have significant probative value and its prejudicial effect could not be cured by direction.

The legal issue before the court was whether the evidence of the prior conviction for grievous bodily harm had significant probative value under Section 31A of the Evidence Act. The appellant contended that the evidence was not significant because it did not help determine the likelihood of the appellant's involvement in the current offence or his state of mind at the time of the offence. The court considered whether the prior conviction could rationally affect the assessment of the probability of the existence of a fact in issue, and whether the probative value of the evidence was such that fair-minded people would think that the public interest in adducing all relevant evidence of guilt must have priority over the risk of an unfair trial.

The court found that the prior conviction had significant probative value as it could rationally affect the assessment of whether it was the appellant who struck the complainant, and if so, whether he was acting in self-defence. The court held that the evidence was relevant and that the prejudicial effect could be managed by direction. The appeal was dismissed.

The court did not make any orders beyond dismissing the appeal.