LAW

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​KembaraXtra-Case Law-Marison (1996) CA - Study Notes on Automatism Defence

​I. Case Summary
  • Defendant (D): Diabetic, prone to hypoglycaemic episodes causing loss of consciousness without warning.
  • Incident: D's car veered into oncoming traffic, colliding with another car and killing the driver.
  • Charge: Causing death by dangerous driving.
  • Trial Judge's Ruling: D was aware of the risk of an episode while driving.
  • D's Appeal Ground: Judge's ruling was incorrect.
II. Court of Appeal (CA) Holding
  • Automatism Defence:
    • D did become an automaton at the time of the accident.
    • However, D could not use automatism as a defence.
  • Rationale for Denying Automatism:
    • D was in a dangerously defective state due to his diabetes prior to the accident.
    • D had already committed the offence of dangerous driving before the accident occurred (i.e., by driving while knowing of the foreseeable risk).
    • The hypoglycaemic episode was reasonably foreseeable.
  • Conclusion: The trial judge's ruling was correct.
III. Key Legal Principles & Concepts
  • Automatism: A state where an individual acts without conscious control. Can be a defence if truly involuntary and not self-induced/foreseeable.
  • Dangerous Driving: Driving in a manner that falls far below the standard expected of a competent and careful driver and which it would be obvious to a competent and careful driver that driving in that way would be dangerous.
  • Foreseeability of Risk: A crucial element in determining culpability, particularly when a medical condition might lead to dangerous behaviour. If a risk is foreseeable, an individual may be deemed responsible for taking precautions or avoiding activities that could lead to harm.
  • Prior Fault / Self-Induced Automatism (Implicit): Although not explicitly stated as "self-induced automatism," the judgment hinges on D's prior knowledge and the foreseeability of the episode, which effectively negates the defence because D was culpable for putting himself in that position.


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