Diehm v Director of Public Prosecutions (Nauru)

The case of *Diehm v Director of Public Prosecutions (Nauru)* concerned an appeal against convictions for rape. The appellants, Mr and Mrs Diehm, argued that a miscarriage of justice had occurred because the prosecution failed to call a material witness, Constable Harris, who had attended the scene with Senior Constable Deireragea. The appeal was heard by French CJ, Kiefel and Bell JJ.

The central legal issues before the court were whether the prosecutor's failure to call Constable Harris constituted a miscarriage of justice, and whether the trial judge had erred in referring to Constable Harris's statement, which was not formally in evidence, when considering the impact of his absence. The court also considered the scope of a trial judge's statutory power and duty to call a witness of their own motion, specifically when that witness's evidence is considered "essential to the just decision of the case."

The court reasoned that the trial judge had carefully considered the evidence, including the conflicting accounts of what was said upon the police's arrival at the appellants' home. While the trial judge noted the absence of Constable Harris and referred to his statement to assess the impact of this absence on the defence's ability to challenge Senior Constable Deireragea's evidence, the court found that this reference did not occasion a breach of natural justice. The trial judge ultimately found Senior Constable Deireragea's evidence credible and concluded that the absence of Constable Harris did not prevent a just decision, as the core of the prosecution's case was supported by other evidence, including the complainant's distress.

The court granted an extension of time to appeal but ultimately dismissed the appeal.