R v Knowles

The appellant, R v Knowles, appealed against his convictions for two counts of murder following a head-on collision on the Lincoln Highway that resulted in the deaths of the driver and a passenger of the other vehicle. The prosecution's case posited that the appellant intentionally drove his four-wheel drive vehicle into the path of the oncoming vehicle with the intent to commit suicide. The appeal was heard by Kourakis CJ, Vanstone and Doyle JJ.

The central legal issue before the court was whether the trial judge had adequately directed the jury regarding the impact of the appellant's intoxication on their assessment of proof for the intention to kill or cause grievous bodily harm. The appellant contended that the summing up failed to sufficiently address how intoxication might affect the appellant's ability to form the necessary intent.

The court considered that while the trial judge had repeatedly directed the jury that evidence of intoxication was relevant to the elements of murder, the summing up did not specifically highlight the potential for confusion or lack of advertence to long-term consequences in an intoxicated individual when directing on the third element of murder. However, the court found that the jury was not left unaware of the need to consider intoxication in relation to the proof of the third element. The court reasoned that given the appellant's threats of suicide by driving into oncoming traffic, it was practically impossible for the jury to find that he deliberately executed such a plan without advertence to the high probability of causing grievous bodily harm to others. The court concluded that the summing up was not deficient, particularly as the defence's primary focus was on the issue of deliberation rather than the specific impact of intoxication on intent.

For these reasons, the appeal was dismissed.