Heffernan v The Queen

The appeal concerned a conviction arising from a dispute where the appellant, Heffernan, alleged a miscarriage of justice. The core of his argument was that the trial judge failed to order an investigation into his fitness to stand trial and did not direct the jury on the defences of insanity and diminished responsibility. The matter was heard by Martin (BR) CJ, Mildren, and Thomas JJ.

The legal issues before the court were whether the trial judge erred by not initiating an inquiry into the appellant's fitness to stand trial, despite a history of mental illness, and whether the judge was obligated to direct the jury on the defences of insanity and diminished responsibility, particularly when the appellant indicated he did not wish to rely on them. The court also considered the statutory framework governing mental impairment and fitness to stand trial, including the presumption of competence.

The court reasoned that the Crown had fulfilled its duties and that the appellant had consistently demonstrated an understanding of the proceedings and actively participated in his defence, even raising novel arguments. While acknowledging the appellant's history of Chronic Paranoid Schizophrenia and a prior finding of unfitness to stand trial, the court noted that a subsequent jury had found him fit. Crucially, the appellant had explicitly instructed his counsel not to rely on defences of insanity or diminished responsibility and did not want medical practitioners called in relation to his mental condition. The court found no evidence that the appellant's mental state at the time of the trial impaired his judgment, reasoning, ability to follow proceedings, or capacity to participate in his defence.

The appeal was dismissed.