Katsuno v The Queen

The High Court of Australia considered an appeal by Katsuno against a conviction for a Commonwealth offence tried in a Victorian court. The central dispute concerned the practice of the Director of Public Prosecutions (DPP) in Victoria utilising information provided by the police about potential jurors to inform the exercise of peremptory challenges. Katsuno argued that this practice was unlawful and fundamentally flawed the trial process.

The legal issues before the High Court included whether the practice of the police providing information about potential jurors to the DPP, which was then used to exercise peremptory challenges, was prohibited by the *Juries Act 1967* (Vic). The Court also had to determine the consequences of any such prohibition, specifically whether it constituted a fundamental failure to observe the requirements of the criminal trial process and impacted the constitutional requirement of trial by jury and the representative nature of the jury. The relevance of the reasons for exercising a peremptory challenge was also a consideration.

The High Court reasoned that the *Juries Act 1967* (Vic) did not prohibit the practice in question. The Court found that the provision of information by police to the DPP for the purpose of exercising peremptory challenges did not infringe upon the constitutional requirement of trial by jury or the representative nature of the jury. The exercise of peremptory challenges, even if informed by such information, was not considered a fundamental failure to observe the requirements of the criminal trial process. The Court held that the practice, as conducted, did not invalidate the jury's constitution or authority, nor did it fundamentally undermine the trial process.

The appeal was dismissed.