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KembaraXtra- Case Law-Hennessy (1989) CA
Case Overview
Case Overview
- Defendant (D): Diabetic, charged with driving whilst disqualified.
- Plea: Not Guilty.
- Defence Claim: Automatism due to hyperglycaemia (high blood sugar) caused by failure to take insulin, linked to stress, anxiety, and depression.
- Trial Judge Ruling: Appropriate defence was insanity. D subsequently changed plea.
- Automatism Definition (Implied): Requires an external factor.
- Stress, Anxiety, Depression:
- NOT external factors in this context.
- Reasoning: "neither unique nor accidental factors."
- Hyperglycaemia:
- Caused by an inherent defect (diabetes).
- When not corrected by insulin, it's an internal factor.
- This internal factor causes a "disease of the mind."
- Conclusion: The appropriate defence was insanity, not automatism.
- Distinction between Automatism and Insanity: Crucial differentiation based on the source of the condition.
- Automatism: Requires an external, transient cause.
- Insanity: Arises from an internal defect or disease of the mind.
- Internal vs. External Factors: The court strictly interprets what constitutes an "external" factor for automatism.
- Psychological states like stress, anxiety, and depression are generally considered internal for this purpose.
- Conditions stemming from pre-existing medical conditions (like diabetes leading to hyperglycaemia) are typically categorized as internal if not directly caused by an external trigger.
- The court differentiates between a sudden, unforeseen external event and a pre-existing medical condition's manifestation.
- This case reinforces the strict legal definition of automatism, limiting its application.
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