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Supreme Court 12 April 2002

R .v. KERR

[2002] NSWSC 309

Homicide
CRIMINAL LAW

Citation: R v Kerr [2002] NSWSC 309
Court: Supreme Court of New South Wales
Date: 12 April 2002
Judge(s): Barr J

Background

The accused was charged with the murder of a sex worker at his Kogarah flat in the early hours of 5 February 2001. The accused admitted the acts constituting the offence but pleaded not guilty on the ground of mental illness. He elected for trial by judge alone, with the Crown's consent.

The accused had a significant history of mental illness, including a family history of schizophrenia, long-term drug use involving cannabis, LSD, heroin, and amphetamines, and documented episodes of hallucinations, delusional thinking, and thought disorder. Multiple treating clinicians had assessed him before the killing, and he had been advised to take antipsychotic medication but had not consistently done so.

On the night in question, the accused had been using amphetamine. He believed the deceased had been sent by Satan to kill him, and that this message came from God. He attacked her with a heavy torch and subsequently with a large carving knife, causing injuries that proved fatal.

  • Whether the accused satisfied the mental illness defence by proving, on the balance of probabilities, that at the time of the killing he was suffering from a disease of the mind that prevented him from knowing that what he was doing was wrong.
  • Whether the accused had sufficient mental capacity at the time of trial to elect trial by judge alone and to conduct his defence.

Decision

Barr J applied the test drawn from the 1843 English case of R v McNaghten, as developed in Australian law. The relevant question was whether the accused, due to a disordered condition of the mind, was unable to reason about the moral quality of his actions with a moderate degree of sense and composure, and therefore could not know that what he was doing was wrong.

Both the prosecution psychiatrist (Dr Nielssen) and the defence psychiatrist (Dr Westmore) agreed that the accused was severely mentally ill at the time of the killing. Both experts considered that the accused's illness, in combination with his amphetamine use that night, produced acute psychotic symptoms including the delusional belief that the deceased had been sent by Satan to kill him. The accused believed he was acting on a special message from God.

Barr J accepted the psychiatric evidence and was satisfied that the accused did not know that what he was doing was wrong at the time of the killing. The defence of mental illness was established on the balance of probabilities.

On the question of trial capacity, both psychiatrists agreed that, following a year of supervised treatment in custody, the accused understood the trial process and could make informed decisions about his defence. Barr J was satisfied the accused had the necessary mental capacity to elect trial by judge alone.

Orders Made

  • The accused was found not guilty of murder by reason of mental illness.
  • The accused was ordered to be detained in the psychiatric ward of the hospital at Long Bay Correctional Centre, or such other place as determined by the Mental Health Review Tribunal, until released by due process of law.

Key Takeaways

  • The mental illness defence requires the accused to prove, on the balance of probabilities, that a disease of the mind at the time of the offence prevented them from knowing that what they were doing was wrong, including being unable to reason about the moral quality of the act with moderate calmness.
  • Where both prosecution and defence psychiatrists agree that the accused was severely mentally ill at the time of the offence, that consensus is a significant foundation for the court's finding on the defence.
  • A finding of not guilty on the ground of mental illness does not result in unconditional release. Under the Mental Health Act 1990, the accused is detained as a forensic patient and can only be released by order of the Governor-in-Council, following review and recommendation by the Mental Health Review Tribunal, and only if the Tribunal is satisfied the safety of the accused and the public would not be seriously endangered.
  • Conditional release remains subject to ongoing supervision and compliance requirements, with breaches potentially resulting in reapprehension and detention.
  • The capacity to elect trial by judge alone is a distinct assessment from capacity at the time of the offence; an accused may have lacked criminal responsibility at the time of the act but nonetheless have sufficient capacity to participate meaningfully in the trial process after a period of treatment.

Legislation and Cases Referenced

Legislation:
- Mental Health Act 1990 (NSW)

Cases:
- R v McNaghten (1843) (the foundational statement of the mental illness defence test)