Whiteside & Dieber v Director of Public Prosecutions

Whiteside & Dieber v Director of Public Prosecutions concerned an appeal to the High Court of Australia regarding the admissibility of evidence obtained through covert surveillance. The appellants, Whiteside and Dieber, were charged with various offences, and the Director of Public Prosecutions sought to admit recordings of conversations obtained through listening devices installed in their vehicles. The central dispute revolved around whether these recordings constituted evidence unlawfully obtained, and therefore should be excluded under s 138 of the *Evidence Act 1995* (NSW).

The High Court was required to determine whether the use of listening devices, authorised under federal legislation, rendered the evidence obtained thereby "improperly or illegally obtained" for the purposes of s 138 of the *Evidence Act 1995* (NSW). This involved considering the interplay between federal and state laws governing surveillance and evidence, and the discretion of the court to exclude improperly or illegally obtained evidence. The court also had to assess whether, even if the evidence was improperly obtained, its admission would be unfair to the accused.

The High Court held that the evidence was not improperly or illegally obtained. Their Honours reasoned that the surveillance was conducted pursuant to valid federal legislative authority, which contemplated the use of listening devices. The Court found that the operation of federal law, which permitted the surveillance, did not render the evidence obtained "improperly or illegally" in the context of s 138 of the *Evidence Act 1995* (NSW). Furthermore, the Court concluded that admitting the evidence would not be unfair to the appellants, as the legislative framework provided for such surveillance and the appellants had not demonstrated any specific prejudice arising from its use.

The appeal was dismissed.