Director of Public Prosecutions Northern Territory v WJI

The Director of Public Prosecutions for the Northern Territory appealed to the High Court of Australia against a decision of the Supreme Court of the Northern Territory concerning the admissibility of evidence in a criminal trial. The dispute centred on whether certain statements made by the accused, WJI, were admissible as evidence against him.

The High Court was required to determine whether the Supreme Court had erred in excluding the statements made by WJI. Specifically, the appeal raised questions about the application of the common law exclusionary rule concerning improperly or illegally obtained evidence, and whether the discretion to exclude such evidence had been correctly exercised by the trial judge.

McHugh and Kirby JJ, in their joint judgment, considered the principles governing the admission of evidence obtained in contravention of the law. They affirmed that while the common law grants a discretion to exclude improperly or illegally obtained evidence, this discretion is not unfettered. The court must balance the probative value of the evidence against the unfairness to the accused that its admission might occasion, and also consider the public interest in the conviction of those guilty of criminal offences. Their Honours found that the Supreme Court had not erred in its application of these principles and that the exclusion of the evidence was justified.

The appeal was dismissed.