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Supreme Court 7 August 2014

Director of Public Prosecutions v AB (No 2)

[2014] NSWSC 1038

Homicide
CRIMINAL LAW IMPOSITION OF LIMITING TERM EFFECT OF MENTAL CONDITION REFER TO MENTAL HEALTH TRIBUNAL

Citation: Director of Public Prosecutions v AB (No 2) [2014] NSWSC 1038
Court: Supreme Court of New South Wales
Date: 7 August 2014
Judge: Adams J

Background

The defendant was charged with the murder of a woman he shot five times at her home in July 2010. Because of his mental condition, he was found unfit to stand trial. The matter therefore proceeded as a "special hearing" under the Mental Health (Forensic Provisions) Act 1990 (NSW), conducted without a jury, in which the defendant was taken to have pleaded not guilty.

In the earlier judgment (Director of Public Prosecutions v AB [2013] NSWSC 1739), the Court found that, on the limited evidence available, the defendant was not guilty of murder but guilty of manslaughter. The reduction from murder to manslaughter rested on medical evidence establishing that the defendant's powers of reason, judgment, and self-control were substantially impaired at the time of the offence by an abnormality of mind. That abnormality arose from a combination of dementia, frontal lobe brain damage, and depression.

This second judgment dealt with the imposition of a "limiting term": a statutory estimate of the sentence the court would have imposed had the defendant been fit to stand trial and convicted in the ordinary way.

  • What is the appropriate limiting term to impose following a special hearing finding of manslaughter under the Mental Health (Forensic Provisions) Act 1990 (NSW)?
  • How should the defendant's mental condition, both at the time of the offence and at the time of sentencing, affect the assessment of that limiting term?
  • What weight should be given to objective seriousness, subjective features, and the purposes of sentencing in this context?

Decision

The Court began by noting the statutory framework. Under s 23(1)(b) of the Mental Health (Forensic Provisions) Act 1990, the limiting term must represent the court's best estimate of the sentence it would have imposed had the special hearing been a normal criminal trial resulting in a guilty finding. The purpose of the limiting term is to ensure that an unfit defendant is not, in effect, punished more harshly than a defendant who stood trial in the ordinary way.

Objectively, the Court characterised the offending as very serious. The defendant armed himself with a rifle, travelled to the deceased's home, and shot her multiple times in the presence of neighbours, making no attempt at concealment. The Court found he understood the criminality of his actions despite his impaired judgment, and concluded there was a significant degree of moral culpability warranting a substantial term.

At the same time, several subjective factors moderated the assessment. The defendant was nearly 65 at the time of the offence and almost 69 at the time of sentencing. His dementia had worsened and would continue to do so. Medical evidence indicated that life expectancy following a dementia diagnosis is often five to ten years, particularly where hypertension is present. The Court found that the defendant's deteriorating condition made him an unsuitable vehicle for general deterrence and that he would not again commit dangerous violence. A limiting term extending beyond the point at which a defendant can understand where he is and why, the Court observed, serves no useful public purpose.

Weighing all of these considerations, the Court nominated a limiting term of seven years, commencing 10 July 2010, the date of the offence.

Orders Made

  • A limiting term of seven years, commencing 10 July 2010, was imposed.
  • The defendant was referred to the Mental Health Review Tribunal pursuant to s 24 of the Mental Health (Forensic Provisions) Act 1990 (NSW).

Key Takeaways

  • Under s 23(1)(b) of the Mental Health (Forensic Provisions) Act 1990 (NSW), the limiting term imposed after a special hearing must reflect the court's best estimate of the sentence that would have been appropriate following a conventional guilty verdict, ensuring that unfit defendants are not penalised more harshly than those who stand trial.
  • Substantial impairment of mind under s 23A of the Crimes Act 1900 (NSW) can reduce a finding from murder to manslaughter even where the defendant understood the criminality of his conduct, provided the impairment materially affected reasoning, judgment, and self-control.
  • A defendant's deteriorating mental health at the time of sentencing is a relevant consideration, particularly where continued imprisonment would extend beyond any meaningful comprehension of the reason for it.
  • General deterrence carries reduced weight when the defendant's mental condition was a significant contributing cause of the offending and the risk of reoffending is assessed as negligible.
  • The Supreme Court noted the partial nature of the limiting term regime: unlike ordinary sentences, no non-parole period can be set, meaning the mechanism only partially addresses the potential injustice faced by defendants unfit to stand trial.

Legislation and Cases Referenced

Legislation:
- Mental Health (Forensic Provisions) Act 1990 (NSW), ss 21(3)(a), 23(1)(b), 24
- Crimes Act 1900 (NSW), ss 23 (provocation), 23A (substantial impairment), 24 (maximum term for manslaughter)

Cases:
- Director of Public Prosecutions v AB [2013] NSWSC 1739 (the principal judgment from the special hearing)