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Supreme Court 12 December 2000

Regina v Yun Young Ko

[2000] NSWSC 1130

Homicide
SENTENCE MANSLAUGHTER PROVOCATION AND SUBSTANTIAL IMPAIRMENT

Citation: Regina v Yun Young Ko [2000] NSWSC 1130
Court: Supreme Court of New South Wales
Date: 12 December 2000
Judge(s): Kirby J

Background

The accused, a Korean-born woman who had trained as a nurse, came to Australia in 1997 and eventually moved into accommodation shared with the deceased and his sister. She alleged the deceased raped her, after which she became pregnant and was pressured into a termination. The couple later married, and the accused described the marriage as marked by sexual brutality, financial instability, and severe isolation.

In August 1999, following a period of escalating conflict, the accused fatally stabbed the deceased. She was charged with murder.

The accused pleaded not guilty to murder but guilty to manslaughter. The Crown accepted that plea on the basis that she was suffering from a substantial impairment of mind due to an abnormality of mind at the time of the offence. The defence also raised that provocation could not be excluded, and the court was required to make factual findings and impose sentence accordingly.

  • What facts relevant to sentencing could be established, particularly whether provocation had been made out alongside substantial impairment
  • How the coexistence of provocation and substantial impairment affected the objective seriousness of the offence
  • What sentence was appropriate given the nature of manslaughter, the personal circumstances of the accused, and the relevant mitigating and aggravating factors
  • Whether special circumstances existed justifying a departure from the standard ratio of non-parole period to head sentence

Decision

Kirby J accepted the accused's account of the rape, subsequent coercion to terminate two pregnancies, and ongoing physical and psychological abuse during the marriage. His Honour found these facts compelling and established on the evidence. The accused's profound distress was compounded by cultural factors, including the significance attached to virginity before marriage in Korean culture and her sense of shame and isolation in a foreign country.

The court found that provocation could not be excluded and that the accused had been substantially impaired by an abnormality of mind at the time of the killing. Relying on the Court of Criminal Appeal's reasoning in R v Low, Kirby J noted that the combination of provocation and substantial impairment operated together to reduce the objective seriousness of the offence significantly.

The use of a knife was treated as a circumstance of aggravation, and the court acknowledged that a young man had lost his life. However, the significant extenuating circumstances, including the history of abuse, the accused's psychological condition, genuine remorse, and the low risk of reoffending, weighed heavily in mitigation.

Because the accused was suffering from an abnormality of mind, the court found the offence unsuitable as a vehicle for general deterrence, and personal deterrence was unnecessary given the negligible risk of further offending. The need for ongoing psychiatric care supported a finding of special circumstances under s 44(2) of the Crimes (Sentencing Procedure) Act 1999, justifying a longer parole period relative to the non-parole period than the statute would otherwise produce.

Orders Made

  • The accused was sentenced to imprisonment for 4 years with a non-parole period of 18 months, backdated to 30 August 1999
  • Eligibility for parole: 28 February 2001
  • Sentence expiry: 29 August 2003

Key Takeaways

  • Where both provocation and substantial impairment of mind are established in a manslaughter case, the two factors operate together to reduce the objective seriousness of the offence, and this combined effect must be reflected in the sentence.
  • Manslaughter encompasses a wide range of circumstances and culpability, and no fixed sentencing tariff applies. Each case requires individual assessment, with the felonious taking of human life as the starting point.
  • Where the offender was suffering from an abnormality of mind at the time of the offence, a sentence designed to serve as a general deterrent is generally not appropriate.
  • Special circumstances under s 44(2) of the Crimes (Sentencing Procedure) Act 1999 can be established where an offender requires ongoing psychiatric care, justifying a non-parole period that is proportionally shorter than the default.
  • The Supreme Court conducted its own factual inquiry at sentencing to determine the circumstances relevant to the exercise of the sentencing discretion, including whether adverse facts were proved beyond reasonable doubt and mitigating matters on the balance of probabilities, applying the principles in Savvas v The Queen (1995) 183 CLR 1.

Legislation and Cases Referenced

Legislation
- Crimes (Sentencing Procedure) Act 1999 (NSW), s 44(2)

Cases
- Savvas v The Queen (1995) 183 CLR 1
- R v Pilley (1991) 56 A Crim R 202
- R v Low (1991) 57 A Crim R 8
- R v Blacklidge (unreported, Court of Criminal Appeal, 12 December 1995)
- R v Scognamiglio (1991) 56 A Crim R 81