Thompson v The Queen

In *Thompson v The Queen*, the High Court of Australia considered an appeal by the applicant, Thompson, against his conviction for murder. The central dispute concerned the admissibility of certain evidence obtained during a police interview and the subsequent application of the *Criminal Investigation Act 1981* (NSW).

The High Court was required to determine whether the trial judge had erred in admitting evidence derived from the applicant's statements made during a police interview, despite concerns about the voluntariness of those statements and compliance with statutory requirements. Specifically, the court had to consider the scope of the exclusionary rule concerning improperly or illegally obtained evidence and the discretion of the trial judge to admit such evidence in the interests of justice.

The court's reasoning focused on the interpretation of the *Criminal Investigation Act 1981* (NSW) and the common law principles governing the admission of evidence. Mason C.J. and Brennan J, in a joint judgment, held that the trial judge had correctly exercised their discretion in admitting the evidence, finding that while there may have been some technical breaches of the Act, the evidence was not unfairly prejudicial to the applicant and its probative value was significant. Deane and Dawson JJ concurred, emphasizing that the exclusionary discretion should not be exercised lightly and that the public interest in bringing offenders to justice weighed heavily in favour of admission. Gaudron J, while agreeing with the outcome, expressed reservations about the extent to which the Act had been complied with.

The appeal was dismissed, and the conviction was affirmed.