Background
On 4 June 2020, Mr. Hearn telephoned police stating he was suicidal and wished to die. Police and ambulance officers responded to his home in rural Queensland. They found him intoxicated, poorly dressed, and exposed to freezing conditions. Mr. Hearn repeatedly refused to go to hospital, stating he wished to be left alone to “die peacefully.” Officers nonetheless detained him under section 157B of the Public Health Act 2005 (Qld) on the belief that his behaviour indicated immediate risk of serious harm arising from mental disturbance.
When paramedics attempted to administer sedative medication to facilitate transport, Mr. Hearn resisted violently. He spat on the ambulance officer, police sergeant, and driver; kicked police officers; and lashed out with his hands. One officer deployed a taser to subdue him. He was handcuffed, sedated, and transported to hospital. The sergeant completed an emergency examination authority after arrival.
Mr. Hearn was convicted by jury of four counts of assault: assault of an ambulance officer (2 years, aggravated by spitting); two assaults of police officers (12 months each, aggravated by bodily harm and spitting respectively); and assault of an emergency ambulance driver (6 months). He received a cumulative 2-month sentence for contempt of court committed during trial. He had served 812 days in pre-sentence custody.
The Court’s Holding
The Court of Appeal (Bond JA, Bradley JA, Cooper J) dismissed Mr. Hearn’s appeal against conviction and refused leave to appeal his sentence. The court affirmed the trial judge’s jury directions as legally adequate and found no miscarriage of justice. The trial judge correctly instructed the jury that they must acquit Mr. Hearn if they were not satisfied beyond reasonable doubt that his detention and sedation were lawful under the Public Health Act—effectively making lawfulness of the officers’ actions a live issue for the jury to resolve.
The court found the trial judge properly explained sections 157B, 157C, and 157D of the Public Health Act to the jury. Section 157B permits detention and transport where an officer believes the person exhibits behaviour indicating immediate risk of serious harm, the risk arises from mental disturbance, and urgent examination or treatment appears necessary. Section 157C requires officers to inform the person of detention and explain its effects in a comprehensible manner. The trial judge directed the jury that the Crown bore the onus of proving these elements, and that the officers’ actions (including sedation under clinical protocols) were within lawful authority if the statutory conditions were satisfied.
The court rejected Ground 2 arguments that the trial judge failed to direct the jury on self-defence, honest and reasonable mistake, and provocation. Once the jury found the detention and sedation lawful, these defences became inapplicable: officers acting within legal authority cannot be resisted as if they were acting unlawfully. The court also rejected the argument that Mr. Hearn’s lack of legal representation resulted in unfair trial procedures (Ground 3), finding the trial judge provided fair process and opportunity to present his case.
Key Takeaways
- Police and paramedic powers to detain and sedate under mental health legislation are a complete defence to assault charges if exercised lawfully, regardless of the person’s subjective resistance or belief.
- Where detention authority is at issue, the jury must determine whether statutory preconditions (immediate risk, mental disturbance, urgent need for treatment) are satisfied; lawfulness is a threshold question, not a mere procedural detail.
- Paramedics may lawfully sedate persons under clinical protocols (such as sedation assessment tools with validated scoring) during emergency detention, even without explicit consent, when protocols indicate the person meets criteria for sedation.
- Procedurally adequate jury directions on statutory authority satisfy the trial judge’s duty to direct on lawfulness, even if the specific word “lawful” is not used in every passage.
- Unrepresented accused persons have no automatic right to retrial merely because self-represented; fair procedures and opportunity to contest the Crown case suffice.
Why It Matters
This decision clarifies the relationship between emergency mental health powers and criminal assault liability in Australia. It establishes that where police and paramedics act under mental health detention and treatment powers, the threshold question is always whether the statutory preconditions for such action are satisfied. If they are, resistance or assault by the detainee becomes unlawful and prosecutable; if they are not, the officers lose authority and assault charges should fail. The decision thus protects both vulnerable persons (by requiring proof of genuine danger) and emergency responders (by providing legal cover for necessary interventions in mental health crises).
The decision has practical significance for frontline officers, paramedics, and hospitals: it confirms that compliance with statutory criteria and clinical protocols provides legal protection when responding to suicidal or mentally disturbed persons in remote or hazardous circumstances. It also reinforces that juries, not judges, determine whether those criteria were met in individual cases, ensuring community participation in assessing the reasonableness of involuntary detention and medical intervention.