R v A2; R v KM; R v Vaziri (No. 12)

The defendants in this case, A2, KM, and Vaziri, were charged with various criminal offences, including conspiracy to import a commercial quantity of a border controlled drug. A3, a key witness for the prosecution, was also involved in the criminal activities and had provided evidence against the defendants. The Crown sought leave under section 38 of the Evidence Act 1995 to cross-examine A3 on matters relevant to discrediting their testimony. The defendants opposed this application on the grounds that it would be oppressive to A3. The court had previously denied the Crown's application to cross-examine A3 on a particular topic, but the Crown subsequently made a further application for leave to cross-examine A3 on an additional topic.

The central legal issue before the court was whether the Crown should be granted leave to cross-examine A3 on the additional topic, which was previously refused. The court had to consider the potential oppressiveness to A3, the relevance and probative value of the proposed cross-examination, and the potential impact on the fairness of the trial. The defendants argued that the additional cross-examination would cause unnecessary distress to A3 and would not significantly contribute to the case. The Crown, on the other hand, contended that the information was crucial to challenge A3's credibility and to ensure a fair trial.

The court held that the additional cross-examination should not be permitted. It found that the proposed questions were likely to cause A3 significant distress and would not add substantially to the assessment of A3's credibility. The court emphasised that the Evidence Act 1995 was designed to protect witnesses from oppressive cross-examination, and in this case, the potential harm to A3 outweighed the benefits of the additional cross-examination. Consequently, the Crown's application for leave to cross-examine A3 on the additional topic was refused.

In light of the court's decision, the defendants' applications for leave to appeal the decision were dismissed. The trial proceeded with the existing scope of cross-examination permitted by the court.