Gas v The Queen, SJK v The Queen

In *Gas v The Queen* and *SJK v The Queen*, the High Court of Australia considered appeals against convictions for murder. The central dispute concerned the admissibility of evidence obtained through the use of a listening device, specifically whether the evidence was obtained unlawfully and, if so, whether it should be excluded in the interests of a fair trial.

The High Court was required to determine two primary legal issues. First, whether the installation and use of the listening device constituted an unlawful search or seizure under Australian law, particularly in light of relevant legislation and common law principles. Second, if the evidence was obtained unlawfully, the Court had to consider the principles governing the exercise of discretion to exclude such evidence, balancing the public interest in the conviction of offenders against the public interest in upholding the rule of law and protecting individual rights.

The Court's reasoning focused on the interpretation of statutory provisions governing the use of listening devices and the common law power of police to conduct searches. It was held that the evidence obtained by the listening device was unlawfully obtained because the necessary warrants had not been obtained prior to its installation and use. Applying the principles established in *Bunning v Cross* and *Ridgeway v The Queen*, the Court concluded that the unlawful conduct of the police was significant and that the admission of the evidence would bring the administration of justice into disrepute. Consequently, the Court allowed the appeals, quashed the convictions, and ordered new trials.