OKS v The State of Western Australia

The High Court of Australia heard an appeal from the Supreme Court of Western Australia in a matter concerning the applicant, OKS, and the respondent, the State of Western Australia. The dispute arose from a criminal proceeding where OKS was convicted of a serious offence. The core of the appeal concerned the admissibility of certain evidence obtained during the investigation of the offence.

The High Court was required to determine whether the evidence in question, specifically a confession made by OKS, was obtained in contravention of the applicant's rights under the *Criminal Investigation Act 2006* (WA) and, if so, whether that evidence should have been excluded from use at trial. A further issue was whether the trial judge erred in admitting the confession, despite potential breaches of the applicant's rights.

The Court analysed the provisions of the *Criminal Investigation Act 2006* (WA) concerning the rights of persons in police custody, particularly the right to communicate with a lawyer and the requirement for police to inform an arrested person of their rights. The judges considered the circumstances under which a confession might be deemed inadmissible due to a contravention of these rights, weighing the probative value of the evidence against the prejudice it might cause to the accused. The High Court ultimately found that the confession was obtained in contravention of OKS's rights and that the trial judge had erred in admitting it.

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