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Supreme Court 14 June 2018

R v Mottram

[2018] NSWSC 873

Homicide
CRIMINAL LAW SENTENCE PLEA OF GUILTY MURDER OF OFFENDER’S MOTHER SPONTANEOUS OFFENCE OFFENDER 19 YEARS OLD

Citation: R v Mottram [2018] NSWSC 873
Court: Supreme Court of New South Wales
Date: 14 June 2018
Judge(s): Hidden AJ

Background

The offender, a 19-year-old male, pleaded guilty to the murder of his mother at her home in Inverell on 19 October 2015. His upbringing had been deeply troubled: his mother suffered from recurring serious mental illness, exposed him to domestic violence, substance abuse and transient relationships, and at one point obtained an Apprehended Domestic Violence Order (ADVO) against her own son before later breaching it repeatedly by attempting to contact him.

In the years before the offence, the offender's mental health deteriorated significantly. He was diagnosed with Borderline Personality Disorder and moderate recurrent Major Depressive Disorder, made multiple admissions to psychiatric facilities, and struggled with alcohol, cannabis, codeine and other substance abuse. Shortly before the killing, he presented at a hospital after what he believed was a drug-facilitated rape, and his condition appeared extremely fragile.

The killing itself was described as spontaneous rather than premeditated. The offender had no prior criminal convictions and no prior history of violence.

  • What is the appropriate sentence for a guilty plea to murder, taking into account the offender's youth, troubled background, mental health history, and the spontaneous nature of the offence?
  • What weight should be given to the utilitarian value of a guilty plea in calculating the sentence?
  • How should the statutory non-parole period proportion be applied to the total sentence?
  • What role do prospects of rehabilitation play in the sentencing exercise alongside retribution and general deterrence?

Decision

Hidden AJ described this as a "very difficult sentencing exercise," acknowledging that a "dreadful crime" had been committed by a "very troubled young man." The court was required to balance the seriousness of the offence, the community's interest in retribution and deterrence, and the offender's deeply disturbed background, while also fostering realistic prospects of rehabilitation.

The court determined that the appropriate head sentence before accounting for the guilty plea was 24 years imprisonment. A 25 percent reduction was then applied to reflect the utilitarian value of the early plea of guilty, reducing the total sentence to 18 years.

Applying the statutory proportion for non-parole periods, the court set the non-parole period at 13.5 years. The court noted that this proportion would ensure the offender remained subject to supervision and the sanction of parole for an extended period following release, which it regarded as appropriate given the circumstances.

Several driving offences arising from the offender taking the deceased's car after the killing were placed on a Form 1 document, meaning they were taken into account in the overall sentence rather than dealt with separately.

Orders Made

  • The offender sentenced to a non-parole period of 13 years and 6 months, commencing 19 October 2015 and expiring 18 April 2029.
  • Balance of term of 4 years and 6 months, commencing 19 April 2029 and expiring 18 October 2033.
  • Eligible for release on parole on 19 April 2029.
  • Driving offences (taking and driving a conveyance without permission, negligent driving, and driving without a licence) taken into account on a Form 1.

Key Takeaways

  • A spontaneous act of violence, combined with a profound history of childhood trauma, parental neglect and mental illness, can operate as significant mitigating factors in a murder sentence, even where the objective seriousness of the offence itself remains very high.
  • Where an offender's mental health history and background of troubled upbringing are extensively documented and agreed upon, those matters form a central part of the sentencing court's reasoning rather than peripheral considerations.
  • A 25 percent discount for the utilitarian value of a guilty plea was applied in these circumstances, consistent with established sentencing practice in New South Wales.
  • Sentencing statistics and comparable case schedules were found to be of limited assistance where the spectrum of factual circumstances across the cases surveyed was too wide to yield meaningful guidance.
  • Under the statutory non-parole period provisions, the proportionate setting of the non-parole period served the additional purpose of ensuring extended post-release supervision, which the court regarded as appropriate for a young offender with complex mental health and substance abuse issues.

Legislation and Cases Referenced

Legislation:
- Crimes Act 1900 (NSW) s 23A (substantial impairment by abnormality of mind, relevant to the guilty plea context for murder)

Cases:
- No specific cases were cited in the provided judgment text.