Polyukhovich v The Commonwealth of Australia

The case of *Polyukhovich v The Commonwealth of Australia* involved a question reserved for the consideration of the Full Court of the High Court of Australia. The parties were Ivan Timofeyevich Polyukhovich and the Commonwealth of Australia, with Robert William Reid also named. The core of the dispute, as presented in this excerpt, concerned the existence of an international obligation on states to search for and prosecute war criminals.

The legal issues before the Court included whether a customary international law obligation exists for states to investigate and bring to trial alleged war criminals present within their territories. The submissions presented argued that state practice, including the enactment of legislation, the prosecution of individuals in municipal courts (citing examples like Klaus Barbie in France and Imre Finta in Canada), and the establishment of investigative inquiries (such as the Deschenes inquiry in Canada and the Menzies inquiry in Australia), demonstrated a widespread sense of obligation among nations to address the presence of war criminals.

The reasoning presented suggested that this consistent state practice, despite variations in the specific methods employed by different countries (e.g., domestic prosecution versus extradition), could only be explained by an underlying sense of legal obligation. The submissions contended that states feel compelled to take steps to inquire into and bring to justice individuals accused of war crimes when allegations arise concerning their presence within a state's jurisdiction. This practice, it was argued, supports the existence of a binding international obligation.