Calder v The Queen

The High Court of Australia considered an appeal by the applicant, Calder, against his conviction for murder. The applicant had been found guilty of murder by a jury in the Supreme Court of Queensland and subsequently appealed to the Court of Appeal of Queensland, which dismissed his appeal. The central dispute concerned the admissibility of certain evidence obtained during the investigation of the offence.

The primary legal issue before the High Court was whether the trial judge had erred in admitting evidence of statements made by the applicant to police officers. Specifically, the applicant argued that these statements were obtained in circumstances where he was under duress or undue influence, rendering them inadmissible under the common law. The court was required to determine whether the trial judge had correctly applied the principles governing the admissibility of confessional evidence, particularly in light of the applicant's mental state and the conduct of the police.

Toohey J, in his reasons, focused on the voluntariness of the statements. His Honour affirmed the principle that a confession is inadmissible if it is obtained by means of untrue representations or promises, or by violence or threats. While acknowledging that the applicant suffered from a mental disorder, Toohey J found that the evidence did not establish that the statements were involuntary in the legal sense. The police conduct, while perhaps not ideal, did not amount to coercion that would render the confessions inadmissible. The trial judge's decision to admit the evidence was therefore upheld.