R v LANGE

In the case of R v LANGE, the defendant was charged with several serious criminal offences, including aggravated serious criminal trespass, unlawful wounding, aggravated robbery, attempted murder, and wounding with intent to do grievous bodily harm. These offences arose from a single incident involving one victim. The objective elements of the offences were admitted, but the defendant raised the issue of his mental competence to commit the offences at the relevant time. The matter was heard by a judge sitting without a jury, with the central issue being whether the defendant suffered from a mental impairment that rendered him incapable of controlling his conduct, thus negating his criminal liability under section 269C of the Criminal Law Consolidation Act 1935 (SA).

The court examined the defendant's educational and employment background, which indicated that he was of above-average intelligence, having completed a BA with Honours and being a candidate for a Doctor of Philosophy degree before his studies were interrupted. Despite this, the court considered the defendant's long history of alcohol consumption and its impact on his mental health, particularly in the context of a motor vehicle accident in 2000. Neuropsychological evidence suggested that the defendant suffered from post-traumatic stress disorder (PTSD) with associated depression and cognitive impairment due to his alcohol consumption. However, the key legal issue was whether these impairments rendered him incapable of controlling his conduct as required by section 269C of the Act.

The court concluded that the defendant did suffer from a mental impairment at the relevant time but found that this impairment did not render him incapable of controlling his conduct. The neuropsychologist's opinion, while acknowledging the defendant's impairments, did not sufficiently address the specific inability to control conduct as contemplated by the statutory provision. The court held that the presumption of mental competence was not displaced, and the defendant was therefore found to be mentally competent to commit the offences.