Duke v State of New South Wales

Duke was the plaintiff and the State of New South Wales, represented by the Attorney-General, was the defendant. Duke sought to amend his statement of claim to include additional causes of action, including claims of fabrication of evidence by police, and to join a new defendant in the proceeding. The dispute hinged on whether these additional claims were tenable and whether the police were immune from the allegations.

The court was required to determine whether the additional claims were legally tenable, specifically whether they disclosed causes of action in negligence, misfeasance in public office, false imprisonment, and malicious prosecution. The court also had to consider the applicability of the principles of witness immunity and immunity of police from actions in negligence arising from an investigation. The court had to examine whether these immunities applied to the facts and allegations presented.

The court found that the plaintiff's claims in negligence and misfeasance in public office were not tenable because they were not supported by the evidence. The court also held that the police were immune from actions in negligence arising from their investigation, and that the principles of witness immunity applied to the plaintiff's allegations of fabrication of evidence by police. The court therefore dismissed the application to amend the statement of claim and join the additional defendant. The plaintiff was ordered to pay the defendant's costs of the application.