The Court's sentencing task
83The offender is being sentenced for a very serious offence, the taking of a human life. Her plea of not guilty to murder, but guilty of manslaughter was accepted by the Crown on the basis of the provisions of s 23A of the Crimes Act, as reducing her offence from that of murder to that of manslaughter. By her plea the offender has accepted that she is guilty of that offence.
84The evidence establishes that at the time of the stabbing which caused the victim's death, the offender's capacity to understand events, or to judge whether her actions were right or wrong, or to control herself, were substantially impaired by an abnormality of mind, arising from an underlying longstanding depressive illness. In the circumstances it must be accepted that her impairment was so substantial, as to warrant her liability for murder being reduced to manslaughter.
85That does not mean, however, that the appropriate sentence for this offence will necessarily be a low one (see R v Low (1991) 57 A Crim R 8 at 18). The Parliament has required that an appropriate penalty must be imposed on the offender, having in mind the purposes of sentencing fixed by s 3A of the Crimes (Sentencing Procedure) Act. Those purposes are:
"(a) to ensure that the offender is adequately punished for the offence,
(b) to prevent crime by deterring the offender and other persons from committing similar offences,
(c) to protect the community from the offender,
(d) to promote the rehabilitation of the offender,
(e) to make the offender accountable for his or her actions,
(f) to denounce the conduct of the offender,
(g) to recognise the harm done to the victim of the crime and the community"
86The sentence imposed must reflect the gravity of this offence, viewed objectively (see R v Dodd (1991) 57 A Crim R 349 at 354.) Section 21A of the Act also requires that in determining that sentence, consideration be given to specified aggravating and mitigating facts revealed by the evidence, as well as any other objective or subjective factors that affect the relative seriousness of the offence. The sentence must also ensure that there is a reasonable proportionality between the sentence imposed and the circumstances of the crime committed (see R v Scott [2005] NSWCCA 152 at [15].)
87As to general and specific deterrence, the authorities make it clear that in a case such as this, where an offender is suffering from an abnormality of mind at the time of the offence, considerations of deterrence and retribution may be less weighty than in the normal case. Much depends, however on the particular circumstances of the offence (see R v Nguyen (No2) [2009] NSWSC 1120 at [44] - [45]).
88The difficulty of sentencing an offender for an offence of this kind has been repeatedly discussed in the authorities. What was observed in R v Dawes [2004] NSWCCA 363 should be borne in mind. There it was observed at [31] and [34]:
"31 Manslaughter, whatever form it takes, constitutes unlawful homicide. It is always a most serious offence as it involved the taking of another human life and it is the responsibility of the courts to protect and preserve human life and to punish those who unlawfully take it. All human life is to be protected including that of the disabled, the handicapped, the criminal, the derelict and the friendless.
...
34 When the basis of a finding of manslaughter is diminished responsibility (now substantial impairment), pursuant to s 23A of the Crimes Act what is nevertheless ordinarily involved, and what is involved in the present case, is a conclusion that the taking of human life was the consequence of a deliberate and voluntary act, performed with intent to kill or cause grievous bodily harm, or with reckless indifferent to human life. The abnormality of mind diminishes the offender's responsibility for his or her act but it does not negate such responsibility."
89These observations are important to bear in mind in this case. There is no question on the evidence that it was the offender's voluntary, deliberate acts, which not only resulted in the victim's death, but also caused him other considerable harm. What the offender has revealed to assessing psychiatrists shows that her offence is unquestionably a serious one. That must be properly reflected in the penalty imposed.
90It may also not be overlooked that the offender has not given evidence. This means that the accounts she gave the psychiatrists about the victim's threats; his conduct towards her and their son; the views which she formed of him; and what happened on 8 and 9 February have not been tested. The victim of course, cannot speak for himself. It follows that the offender's untested report of relevant matters, including her perceptions of the victim, perceptions which she does not appear to have shared with others before his death, must not unquestioningly be accepted. Also to be considered is that the histories she has given reflect an apparent ongoing desire that their son have a continuing relationship with his father, notwithstanding the poor opinion she came to have of the victim and his dealings with their son, with her and with other women and children.
91There is no issue between the parties that there must be a term of imprisonment imposed for this serious offence, by which the offender took the victim's life, as the result of her deliberate and voluntary acts, while intending to cause him at the least, grievous bodily harm. In determining the appropriate sentence, the maximum penalty of 25 years imprisonment for this offence, must be borne in mind.
92In R v Backlidge (unreported, New South Wales Court of Criminal Appeal, Gleeson CJ, Grove and Ireland JJ, 24 February 2005), Gleeson CJ observed that:
"It has long been recognised that the circumstances which may give rise to a conviction for manslaughter are so various, and the range of degrees of culpability is so wide, that it is not possible to point to any established sentencing tariff which can be applied to such cases. Of all crimes, manslaughter throws up the greatest variety of circumstances affecting culpability.
At the same time, the courts have repeatedly stressed that what is involved in every case of manslaughter is the felonious taking of a human life. That is the starting point for a consideration of the appropriate penalty, and a key element in the assessment of the gravity of the objective circumstances of the case. (R v Dodd (1991) 57 A Crim R 349; R v Hill (1981) 3 A Crim R 397 at 402.)"
93In assessing the objective criminality of this offence, it is not just the fact of the offender's underlying impairment, but the nature of its impact on the offender, at the time that she killed the victim, which must be considered.
94The experts were largely agreed that the offender was then motivated by a mixture of anger and fear, both of which were exacerbated by her underlying illness. The experts did not agree as to the extent of the impact of her illness on what she did. In considering the impact of her illness, the evidence of what the offender actually did must be considered. That evidence certainly does not leave open the conclusion that all that she did to the victim, even on her own accounts, was the result of a sudden impulsive reaction to the threat which she perceived he presented.
95It may be accepted that what she finally did on 9 February was the result of both fear of what the victim would do to their son and anger over his past treatment of her and others, emotions exaggerated by the effect of her underlying illness. The causative impact of that illness on her violent, fatal attack must have the result that the offence for which she is being sentenced is reduced to one of manslaughter, rather than murder. The sentence for that offence must also properly reflect the impact of her illness, but it does not excuse what she has done.
96It must also be considered that on her accounts, on the evidence of Mr Leung and on the various character evidence relied on, that there is no question that at the time of her offence, the offender had been functioning at a high level, without any apparent impact from her underlying illness on her daily life; her ability to care for her children and to conduct successful social relationships with other people; or to successfully conduct her business. She was also actively pursuing legal steps available to her to deal with her ongoing financial dispute with the victim.
97Before her offence, the nature and extent of the offender's illness was not such that it was having any significant impact on her life or functioning. On the histories she has given, it was in 2008 that she was concerned about her mental condition, so that she took steps to have her sons cared for by their fathers. She appears to have had no such concern in the period leading up to the offence. She was then apparently functioning quite normally.
98The evidence reveals that long before 9 February 2011, the offender perceived that she and their son had been abused by the victim, who was a con man who preyed on women, using their children in order to extort money from them. These were opinions which she formed at a time when she was not adversely affected by her underlying disorder.
99That she was frightened by what the victim said to her about their son, on 8 February, while they were arguing about their financial affairs, before she prepared the soup which she laced, may well be accepted. She believed that the victim presented a serious threat to her son's safety, and that he was again seeking to use him in order to manipulate her for his further financial gain and to evade the legal steps she was pursuing to deal with their ongoing disagreement over financial matters. It may also be accepted that she was already very angry with him about his treatment of her and other women and that her underlying illness exaggerated these emotions.
100In assessing the seriousness of her offence, consideration must not only be given to what the offender finally did on 9 February, but also to what she did on 8 February. On that day, her underlying condition was not having any apparent negative impact upon her normal functioning until threatened by the victim. Even then, on her later accounts, her response to the threat which she perceived the victim first presented on the evening of 8 February, was approached in a measured and controlled way, despite her anger and fear.
101It was then that she decided that she had to act. While preparing dinner she came up with an idea, upon which she then acted, by lacing the soup, in order to give her time to think about what to do. While she later said that she did not consider killing the victim, it cannot be overlooked that she not only drugged him, but several hours later, tied him up, thereby ensuring that she had control over him.
102Also to be considered is that she did not act further, while her sons were awake. She only tied the victim up after they were both asleep at around midnight. She then took further time to consider her various options. She did not stab the victim until the early hours of the morning of 9 February, after having considered her situation over many hours. The stabbing occurred after a further argument, after the victim woke to find that he was tied up. The offender's account was that he was then vomiting, struggling to break free and asking to be freed, as well as making further threats. It was apparently not long before she made the 000 call that she stabbed the victim so as to cause his death. She also grossly mutilated him.
103At what point the offender stabbed the victim and at what point she mutilated his genitals, is not known. She told the 000 operator after 6 am that the stabbing was recent. The autopsy report showed that he had suffered defensive wounds. It follows that the victim was not unconscious while the offender inflicted all of the injuries which he suffered.
104Given the nature of the mutilation, it seems unlikely that this can have occurred before any stabbing or blood loss, notwithstanding that the victim was tied up. Had it occurred beforehand, it is difficult to see that the children would not have been more greatly disturbed by noise than they were. Whatever be the sequence, it is relevant that there is evidence not only that the offender was conscious of the seriousness of what she had done, but that she took steps to ensure that it could not be undone, before she called for assistance.
105In her various accounts, the offender said that she was frightened by all the blood. Despite this, before she called for assistance, she took steps to ensure that her mutilation had the consequences she intended, of stopping the victim in engaging in further behaviour of the kind she believed he had engaged in towards her, that is preying on wealthy women and using their children to extort money from them. That was why she tried to flush away part of his penis, before she called for help. This was clearly not impulsive behaviour, a matter which may not be overlooked, in assessing the seriousness of this offence.
106The nature of the gross mutilation of the victim's genitals must also be considered. For the offender, the Crown's description of her conduct as involving torture was resisted. It is not necessary to use that description, but on the offender's own accounts, the victim was sufficiently awake to fight off her attack, before lapsing into unconsciousness. It follows that the victim's consciousness of his awful situation, may not be overlooked in assessing the nature and seriousness of this offence.
107What the offender finally did on 9 February was no doubt affected by her underlying illness. What cannot be accepted, however, is that the offender suddenly stabbed the victim in an angry, frightened and impulsive response to the threat which she perceived that he had suddenly presented. To the contrary, on her own account, the offender recognised on the evening of 8 February that there was a threat; she decided to deal with it by taking steps designed to bring him under her control; she considered over many hours what she would do; with the result that it was not until the early morning of 9 February, not long before the 000 call, that she repeatedly stabbed and mutilated him. The victim was still alive when the ambulance responded.
108What the offender said during the 000 call, shed significant light not only on what the offender had done, but her awareness of what she had done. She said variously that the victim was dying; that she had killed a crook; that he was conscious and breathing; that she had killed him with a knife; that they had been fighting; that she had done it recently; that he was bleeding very badly everywhere; that he was bleeding from the neck; that he was dying and drowsy; later that he was unconscious; that she was not sure how many times she had stabbed him; and later again, that she had stabbed him in the penis, as well as the neck. She then took steps directed to stopping the bleeding, as the operator asked her to do.
109It follows that while this killing was clearly not premeditated, nor was it an impulsive response to threats which the victim made before dinner on 8 February. What the offender did involved both a measure of consideration and planning, before the wounds which killed the victim were inflicted early the following morning. The mutilation was also deliberate, as were the steps taken to ensure that what she had thereby done could not be reversed.
110That the offender did finally called for assistance, is a factor which must be taken into account in her favour, as must the aid which she rendered the victim, as the 000 operator asked her to do. But so, too, must all of her other acts, for which her responsibility is diminished by her depressive illness, but not thereby excused.
111It follows that the objective seriousness of this offence is such that imposition of a penalty which would result in the offender shortly being released on parole, would be to impose a sentence significantly less than what is warranted by the offence, notwithstanding the impact upon the sentence which the matters relied on for the offender must have.
112It must be accepted that the offender's actions are considerably ameliorated by the impact of her disorder on her ability to distinguish right from wrong and to control her actions at the time of the stabbing, with the result that considerations of deterrence, both specific and general, must be given less weight in this case than would otherwise be the case. Nevertheless, given the evidence of the nature of the impact which her illness had on the offender, over the course of 8 and 9 February and the consideration and planning involved in the offence, which included the deliberate, gross mutilation of the victim and steps taken to ensure that the assistance called for could not undo the damage which had been done, it may not be concluded that deterrence and retribution have no role at all to play in this sentencing exercise.
113This conduct must be denounced by the sentence imposed.