Diamond v The Queen

Diamond appealed his conviction for murder in the Supreme Court of Queensland. The appeal was heard by the High Court of Australia.

The central legal issue before the High Court was whether the trial judge had erred in law by failing to direct the jury on the defence of provocation, despite the defence not having been specifically raised by the appellant at trial. The High Court also considered whether the evidence presented at trial was capable of supporting a finding of provocation.

The High Court held that a trial judge is not obliged to direct a jury on a defence that has not been raised by the accused, unless the evidence is such that it would be perverse to fail to do so. In this instance, the Court found that the evidence did not suggest any circumstances that could reasonably be interpreted as amounting to provocation. Therefore, the trial judge had not erred in law by omitting such a direction. The appeal was dismissed.