Killick v The Queen

The case of *Killick v The Queen* concerned an appeal to the High Court of Australia following a conviction for murder. The appellant, Killick, had been found guilty of murder by a jury in the Supreme Court of New South Wales and subsequently sentenced to a term of imprisonment. The appeal to the High Court raised significant questions regarding the interpretation and application of the law relating to self-defence in the context of a murder charge.

The central legal issue before the High Court was whether the trial judge had adequately directed the jury on the defence of self-defence, particularly in relation to the appellant's subjective belief as to the necessity of using force. Specifically, the court had to consider whether the jury had been properly instructed on the standard to be applied when assessing the reasonableness of the appellant's actions and beliefs in the circumstances as he perceived them. This involved an examination of the relevant provisions of the New South Wales Crimes Act 1900 and how they interacted with common law principles of self-defence.

The High Court, in its joint judgment, clarified the principles governing the defence of self-defence. Their Honours held that the jury's assessment of self-defence must be based on the circumstances as the accused honestly believed them to be, and that the question of whether the force used was necessary and reasonable was to be judged by the jury against those believed circumstances. The court emphasised that the test was not one of objective reasonableness in a vacuum, but rather whether the accused's belief in the necessity of the force used was honestly held, and whether the force used was a reasonable response to the circumstances as the accused perceived them. The appeal was allowed, the conviction was quashed, and a new trial was ordered.