Coulter v The Queen

Coulter appealed his conviction for murder in the Supreme Court of Queensland. The central dispute concerned the admissibility of a confession made by the appellant to police. The appellant argued that the confession was involuntary and therefore inadmissible, as it was obtained in circumstances that rendered it unreliable.

The High Court was required to determine whether the confession was admissible in evidence. This involved considering the principles governing the admissibility of confessions, particularly where there are allegations of unfairness or impropriety in the manner of obtaining the confession. The court had to assess whether the trial judge erred in admitting the confession, thereby potentially vitiating the conviction.

The High Court held that the confession was inadmissible. The majority reasoned that the circumstances in which the confession was obtained rendered it involuntary. Specifically, the appellant, who was of limited intellectual capacity and had been subjected to prolonged questioning without legal advice, was induced to confess by a police officer's assurance that he would be released if he told the truth. This assurance, coupled with the appellant's vulnerability, meant that the confession was not a product of his free will. The court applied the principle that a confession is inadmissible if it is involuntary, meaning it was not made voluntarily by the accused.

The appeal was allowed, the conviction was quashed, and a new trial was ordered.