Additional findings of fact
13It is difficult, if not impossible, to know precisely or even generally what it was that precipitated the offender's violent and fatal attack upon the deceased. As already indicated, they had been in a long-term relationship, which had recently come to an end. They were in the process of extricating themselves from the proprietary and monetary circumstances that linked them, and had each engaged solicitors for that purpose. There was some ongoing tension between them that was apparently connected to the uncertain conclusion of their mutual affairs, but there had been no indication that it would or might lead to violence of any sort. Nothing in the evidence contained the slightest foreboding of what ultimately occurred.
14The offender did not give evidence at the trial or at the sentencing hearing. The only subjective insight into what may have motivated him must therefore be gleaned from his reports to medical practitioners qualified for the purposes of the proceedings, in particular with respect to the partial defence of substantial impairment.
15The offender gave a history to Dr Canaris when first interviewed by him. It is recorded on pages 11-12 of Dr Canaris's 20 August 2012 report in the following terms:
"At the time the [offender] was living in Maitland. I gather he was together with his wife who asked him 'if we could go down the road' and 'get some tea'. He had not wanted to go to Cessnock 'in case I saw her family'. He drove to Rutherford near Maitland to get some food thinking all the while 'this is wrong buddy, I'm staying out of town to avoid the feud' - I came back to Bellbird - I had a few beers - Jodie put the tea on - I was having a few beers - I was just relaxing - she came in and said, 'I want to talk to you - what do we do with the money from the sale of the place' - I just said it goes fifty-fifty - then a huge argument started just about everything in the relationship - she said she wanted nothing to do with my family - I said what do we do about my family - I don't know how long the argument went on for - I tried to ring her parents to sort things out - I couldn't get on to them - I've walked into the bedroom - it's back and forth - by this stage I was really fuming - she said something to me - I don't know what she said - I came to - I got a knife and I was stabbing her - [I thought] what the fuck do I do - there was a big spurt of blood coming out of her stomach - I rang 000...I gone back to try and help her..."
16It is evident from the jury's verdict that they were satisfied that the offender was capable of forming an intention either to kill the deceased or to inflict grievous bodily harm. The offender does not contest for present purposes that it was clearly open to the jury to find him guilty of murder upon the basis of either intention. However, both counsel conceded that the only material that informed a choice between the two was to be found in the physical circumstances that surrounded the death. That is so even despite the (limited) additional detail contained in the offender's account to Dr Canaris.
17It was submitted by counsel for the offender that whereas the stab wounds were self evidently numerous, and the attack in the course of which they were inflicted was frenzied, the intent was consistent with an intention only to inflict grievous bodily harm and that I could not be satisfied beyond reasonable doubt that the offender intended to kill the deceased. The submission was in essence to the effect that the choice available upon the evidence was between two competing possibilities of equal probability and that in the absence of any material persuasively favouring one above the other, I could not find beyond reasonable doubt that the offender stabbed the deceased with the intention to kill her.
18That submission was supported by the (not altogether settled) proposition that an offence involving an intention to kill is generally more serious than one involving only an intention to inflict grievous bodily harm. I briefly examined the different possible views about this issue in R v Kristi Anne Abrahams [2013] NSWSC 952 at [25] - [27]. Accordingly, on the basis of what was said by the High Court of Australia in Cheung v The Queen [2001] HCA 67; (2001) 209 CLR 1 at [14], citing R v Isaacs (1997) 41 NSWLR 374, as findings of fact made against an offender must be arrived at beyond reasonable doubt, any reasonable doubt must be resolved in favour of the offender. The practical effect of that approach, if an intention to kill is generally to be regarded as more serious than one involving only an intention to inflict grievous bodily harm, would therefore oblige me in this case to sentence the offender upon a view of the facts most favourable to him, or relevantly for present purposes, upon the basis that he killed the deceased with no more than an intention to cause grievous bodily harm.
19I am therefore unable to find beyond reasonable doubt that the offender relevantly formed an intention to kill the deceased. Put another way, I am unable to find, consistently with the jury's verdict, that the offender killed the deceased with any greater intention than to inflict grievous bodily harm. I would hasten to add, however, having regard to the violent and sustained nature of the offender's attack upon the deceased, that the difference between the level of seriousness of the offence of murder committed with at least an intention to cause grievous bodily harm and the level of seriousness of the same crime committed with an intention to kill, is in the particular circumstances of this case only slight.
20I am satisfied on the balance of probabilities and I find, consistently with the jury's verdict, that at the time the offender killed the deceased he was suffering from an abnormality of mind that substantially impaired his capacity either to understand events or to control himself. Whereas it is once again not possible to be certain, it seems to me, having regard to the medical evidence, that the jury's verdict was more probably than not the product of a disinclination to apply the community standards test in favour of the offender, so as to reduce the verdict from murder to manslaughter, rather than an anterior rejection of a substantial impairment by reason of an abnormality of mind arising from an underlying condition. Howsoever the jury may have reasoned in fact, which is of course completely irrelevant in the present context, their ultimate conclusion is on the evidence wholly consistent with a finding that the offender suffered from an abnormality of mind that substantially impaired his capacity to understand events or to control himself. In summary I find that the jury could not, acting reasonably, have rejected the offender's medical history or the opinions of the experts. The jury must have accepted that an application of community standards did not permit them to reduce the offender's liability from murder to manslaughter.
21There appears to be no medical contest that the offender was suffering from depression at the time of the killing and had been suffering from that condition for at least a short period prior thereto. He had been prescribed medication for it. There is a dispute about whether the offender was suffering from mild depression, which Dr Skinner favoured, or something more serious, which Dr Canaris favoured.
22In this respect Dr Skinner expressed the opinion in her principal report that it was "probable that [the offender's] judgment and decision making was impaired by depressive illness, further complicated by the use of alcohol." Dr Skinner indicated in a supplementary report that by "judgment" she meant the act of comparing and evaluating choices to decide on a course of action. Dr Skinner went on to say that persons suffering from depression have pervasive alterations of mood so that they perceive events in a negative light, out of proportion to the situation. Their judgment may be compromised by their mood state so that they are less able to understand a situation correctly and to act appropriately. The use of alcohol compounds the situation and may lead to impairment of the ability to behave in an appropriate and mature manner.
23Dr Skinner had earlier expressed the following opinion about the offender:
"I consider that Mr Bretherton has an obsessional-compulsive personality style characterised by preoccupation with orderliness. This is demonstrated by his own account of his lifestyle and by his diary. He has a rigid personality style with inflexible ideas and is concerned about maintaining control. I believe that Mr Bretherton's personality is better described as obsessional-compulsive personality style. I do not consider that he meets the criteria for diagnosis of an autism spectrum disorder."
24Dr Skinner went on to say this:
"In my opinion Mr Bretherton might have a defence at law available to him, based on the diagnosis of depression that he suffered from about October 2010 or earlier. According to the history provided by him and supported by the counselling records, he would have been depressed around the time of the alleged offences. He was experiencing multiple stressors...He attended counselling. He consulted his general practitioner who prescribed anti-depressant medication. It is probable that his judgment and decision making was impaired by his depressive illness, further complicated by the use of alcohol."
25Dr Canaris provided a very long report and gave evidence at the trial consistently with what he had written. He offered the following summary:
"To summarise, I believe that [the offender] suffers from lifelong Asperger's disorder with current comorbid major depressive disorder. His major depressive disorder is currently in partial remission. However, it was very likely active at the time of the killing. There is evidence at the time of the killing of comorbid alcohol abuse and possible dependence though this is clearly in remission if for no other reason than the fact that he has no access to alcohol in gaol. He warrants further testing to exclude frontal/executive cognitive impairment arising from perinatal brain injury and/or alcohol related brain damage."
26Having regard to my earlier finding on the balance of probabilities and consistently with the jury's verdict, that at the time the offender killed the deceased he was suffering from an abnormality of mind that substantially impaired his capacity either to understand events or to control himself, I also find that the underlying condition that had that result was depression associated with an obsessive-compulsive personality style. I am unable to be satisfied that the offender also suffered from an autism spectrum disorder or that any such disorder, even if it existed, substantially impaired his capacity either to understand events or to control himself.
27I am also satisfied on the balance of probabilities and I find, consistently with the jury's verdict, that even though at the time the offender was intoxicated when he killed the deceased, the effects of that intoxication were not such as to deprive him of the availability of the partial defence of substantial impairment by abnormality of mind. He had consumed "five or six beers" and a tumbler of wine. His call to the "000" operator is in evidence, as is his reaction to the police when they entered the bedroom following the stabbing. The evidence otherwise reveals that the offender was able to respond to the operator's advice to use a towel for the purpose of attempting to staunch the flow of blood from the wounds that had been inflicted. The evidence from the police that the offender was moderately affected by the consumption of alcohol is on the one hand not capable of scientific verification or elucidation by reference to either an analysis of the offender's blood alcohol content at the time or scientific opinion of what would have been the likely effect upon him of the consumption of an established or assumed quantity of alcohol. On the other hand, the description "moderately affected by alcohol" does not foreclose the possibility that any impairment of the offender's capacity to understand events or to control himself was the result of the underlying condition or conditions that I have found he had.