Khanna v The Queen

In *Khanna v The Queen*, the High Court of Australia considered an appeal from a conviction for murder. The appellant, Mr. Khanna, had been found guilty of murder by a jury in the Supreme Court of Victoria and subsequently appealed to the Court of Appeal of Victoria, which dismissed his appeal. The High Court granted special leave to appeal from the decision of the Court of Appeal.

The central legal issue before the High Court was whether the trial judge had erred in law by failing to direct the jury adequately on the defence of provocation. Specifically, the court had to determine if the judge's summing up had sufficiently explained the elements of provocation, including the requirement that the provocation must be such as to make an ordinary person act in the way the accused did, and that the provocation must be a substantial cause of the killing.

The High Court, comprising Hayne and Heydon JJ, analysed the principles of provocation as established in Australian criminal law. Their Honours referred to established authorities on the defence, emphasising that the jury must be properly instructed on both the subjective and objective elements of provocation. The court found that the trial judge's directions, when viewed in their entirety, did not adequately convey the objective test to the jury, leaving open the possibility that the jury might have applied an incorrect standard when considering whether the defence had been made out.

Consequently, the High Court allowed the appeal, quashed the conviction for murder, and ordered a new trial.