Factual Background
28 The respondent was charged with the murder of his partner. They had been in a relationship for about three years.
29 His Honour summarised the facts, "taking the Crown case at its highest", as follows (at [8]):
"(a) [PL] and the deceased were joint owners of their home worth about $600,000;
(b) They lived together since 2004, the property having been purchased from the assets of the deceased;
(c) Each of [PL] and the deceased had partners prior to each other;
(d) On Good Friday, 6 April 2007, [PL] and the deceased had an argument, the subject matter of which is, according to the Crown, irrelevant, but concerned "a guy doing tiles", after which [PL] stormed off;
(e) At some time on Saturday morning, 7 April 2007, the couple engaged in consensual sexual intercourse;
(f) During the course of the morning, [PL] made carrot juice for the deceased and/or himself;
(g) While [PL] was making the carrot juice, the deceased "kept at him", they had a fight;
(h) Between 8.15am and 8.30am on 7 April 2007, there was a sound from the house, heard by the neighbour, like a shelf falling, pots clanging and lids rolling around the floor;
(i) The neighbour then heard the deceased singing (but I will assume, notwithstanding the evidence, a scream), there was then silence (said to be for about 10 minutes) and then the sound of [PL] wailing;
(j) At 9.00am a witness rang the home and [PL] was hysterical;
(k) When the first persons arrived at the scene, at about 9.15am, [PL] was seen wailing or crying hysterically, cradling the deceased's head, rocking back and forward, his arms extremely tightly bound around the deceased's neck and head. [PL] was in a state of total distress and was, as stated, totally hysterical;
(l) The deceased's heart had stopped by the time ambulance officers arrived. Resuscitation was unsuccessfully attempted."
30 His Honour also referred to fact there was a 57 minute gap between one witness hearing "crashing noises like a shelf falling" at 9.12am and the respondent calling 000: [9]. In that call, the respondent said, "I have a fight with my friend and my friend dead". The Crown relied on this significant time gap.
31 The Crown relied on evidence that the relationship between the men had been deteriorating and that the deceased had expressed his intention to friends to end his relationship with the respondent. Furthermore, there is suggestion that the respondent would benefit financially from the deceased's death. (The terrace in which they lived had been purchased by the deceased, but registered in both names.)
32 The Crown also relied on the fact that the respondent admitted on four occasions that he and the deceased were fighting. These occasions were the call to 000, to a constable at the scene, to his friend, and when interviewed at the police station. It also relied on the fact that on these occasions the respondent never provided an explanation for the deceased's death.
33 There was some evidence of a fight in the house. The respondent was making carrot juice at some point in the morning, and the metal bowl of the juicer was found, apparently blood stained, near the deceased. This was a possible weapon. The deceased's DNA was found on the spout of the juice extractor. There was evidence that the juicer bowl had been thrown at the wall in the kitchen, above the doorway, causing some damage. There were fine blood sprays around the staircase area and some blood smudges, although these may have been left by the paramedics. A detective at the scene thought he noticed blood on the handle of a cleaning brush in the kitchen.
34 The Crown also relied on evidence inconsistent with an alternative explanation that the deceased fell down the stairs, such as the fact that the deceased was still wearing slip-on backless slippers, which would be highly unlikely after such a fall (although it is possible that the respondent put them back on the deceased). The Crown submitted that the sounds heard by the neighbour were also inconsistent with that explanation and supported the hypothesis that there was a physical altercation. The medical evidence demonstrates that sustaining the particular injuries through a fall alone would be unusual.
35 The autopsy and forensic evidence was unable to definitely state the cause of death. It was not death by natural causes. There is medical consensus that death was caused by a blunt force injury/injuries to the head and/or neck area, perhaps a combination of the two. There was no consensus as to what may have caused those injuries.
36 The deceased had some lesions, scratches and bruises on his body (particularly the upper chest, neck and chin areas) each of which are partly or possibly compatible with the following propositions:
He was struck on the chin, and fell and hit his head on the floor.
A metal bowl may have caused the wound to the chin.
A metal bowl may have been used to create the blunt force injury to the deceased's head.
He tripped and fell down stairs (but must have contacted protruding objects on the staircase to cause the injury pattern).
Some physical struggle occurred (the deceased had arm, hand and knuckle injuries); the respondent when inspected at the police station had evidence of a "chinese burn" on an arm.
One of these events caused the deceased to have a cardiac arrest (the autopsy showed poor health).
Manual strangulation was attempted, or significant force applied to his neck (though there was a lack of some physical indicators usually, but not always, associated with strangulation).
A combination of the above.
37 His Honour's summary of the medical evidence commenced with the statement: "The medical evidence is at best ambivalent" (at [15]). His Honour said:
"[16] Dr Rodriguez testified to brain injuries suffered by the deceased, caused by blunt force injury, being a knock to the head either by the application of force to the head by a blunt object or the head hitting a hard object, e.g. a stair or a wall, etc.
[17] Dr Rodriguez accepted that the brain injuries, of themselves, would not necessarily cause death and 'there is some doubt as to exactly why this person died at the time he did', but considers there is a direct link to the blunt force injuries ... . If, he says, the injuries were to have caused severe diffuse axonal injury (DAI), then the deceased could not have cried out or sung. Further, Dr Rodriguez agrees 'that the exact cause and mechanism of Mr Guzzetti's death cannot be stated beyond reasonable medical doubt'. Dr Rodriguez was unable to say whether the deceased died from brain injuries.
[18] The blunt force injuries to the head could, Dr Rodriguez says, be caused by falling down some stairs. Dr Rodriguez deferred to Dr Botterill as to cause of death because he, Dr Rodriguez, was looking only at the brain and no other part of the body, and he may, in some cases, in determining cause of death, by a process of eliminating other causes, arrive at a conclusion that a seemingly minor, otherwise non-fatal injury, was the cause ... .
[19] I turn then to the evidence of Dr Botterill. He prepared a 13-page report which incorporated Dr Rodriguez's findings. Dr Botterill concluded that the 'direct cause of injury was blunt force head and neck injury'. He could not be certain whether it was a combination of the two or one or the other. 'There was blunt force head injury and blunt force neck injury, both of which have the potential to result in death … [but he] … can't say the relative contribution of both [sic: read each] but … [believed] … that it's most likely that both together have resulted in the death' ... . According to Dr Botterill's report, the deceased was 71 years of age with no past medical history."
38 His Honour then set out the injuries observable on the deceased and added:
"[22] Dr Botterill concluded:
'Although any one of the individual injuries might be associated with a simple fall, the extent of distribution of the injuries is more in keeping with multiple blunt force injuries. It is possible that the neck bruising and chest injuries are related to application of force to the neck but discrete ligature marks or eyeball haemorrhages were not identified.' …
[23] An explanation of the foregoing was given by Dr Botterill. A simple fall was explained as a fall in which the head was hit once. A complex fall (i.e. when the head was hit more than once) would include a fall down stairs. Strangulation usually causes burst blood vessels in the eyelids and eyeballs, which were not present. It is possible to have strangulation without them. Likewise, there was no fracture of the hyoid bone (which sits above the langio cartilages). Nor was there damage to the langio cartilages, to which damage occurs even more often in a strangulation.
[24] The head injuries are not inconsistent with being hit over the head with a blunt instrument. They are also not inconsistent with being hit on the chin by the juicer component, falling back and hitting the head. The head injuries are also not inconsistent with falling down the stairs.
[25] The bruising to the neck is not inconsistent with strangulation. Although, given the absence of petechial haemorrhages (the eyelids and eyeballs) and the absence of damage or fracture to the langio cartilages or the hyoid bone, it is an unusual strangulation, if it be one. It may be consistent with pressure on the carotid artery, at the battery point, causing the heart to slow and/or stop. The bruising to the neck is also not inconsistent with falling down stairs if there were protruding items into or onto which the deceased fell. However, as to the last-mentioned possibility, the injuries are remarkably widespread. Innocent possibilities would also include contact with the metal juice extractor, either at the bottom of the stairs or because the deceased was holding it and came in contact with it on the way down the stairs or at the bottom of the stairs.
[26] There are two extracts of Dr Botterill's examination-in-chief that bear repeating. … [S]peaking of the neck injury, Dr Botterill says:
'These are in keeping with multiple blunt force contacts but I can't say with certainty what the exact nature of those contacts were. There are a number of possibilities. It is possible that something such as the application of force from fingertips may result in that bruising.
…
It is also possible that other types of blunt force contacts, bumping into various structures, might result in this distribution, although it is remarkably widespread. Blows to that area with some other object may result in these changes. It is also conceivable that some of these changes may be related to attempts at resuscitation … in a very inexpert way … although again that is completely the wrong place to be doing resuscitation. I think they are the range of explanations but the truth is I can't say which of those particular possibilities is the explanation for those bruises and surface marks '. (Emphasis added.)"
39 His Honour then referred to the evidence of Professor Hilton, called on the part of the respondent, but which, his Honour said, he would only rely upon insofar as such evidence could assist the Crown. His Honour said (at [30]):
"Professor Hilton had a different opinion on the cause of death and on the mechanism for death, or, more accurately, questioned the capacity to come to any conclusion beyond reasonable medical doubt. This material I do not consider in this application."
40 As it plays a role in his Honour's ultimate conclusion, I note that the phrase "mechanism of death" was adopted from Professor Hilton's evidence. In cross-examination, he said: "The exact mechanism by which he died is obscure". He was affirming the contents of a report he had written.
41 That report was put to the Crown expert neuropathologist, Dr Michael Rodriguez:
"Q Professor Hilton continued, he says, 'Therefore, there is some doubt as to the exact mechanism of death and its direct link to blunt force head injury' do you agree with that statement?
A In part. 'Exact mechanism', yes, I agree there is some doubt as to exactly why this person died at the time he did. I think there's certainly evidence there's a direct link to the blunt force injuries that this person sustained."
42 Justice Rothman set out other evidence by Professor Hilton:
"[31] However, other material was adduced, in a most effective cross-examination of Professor Hilton, as to the cause of the injuries to the neck, in particular. Indeed, the evidence of Professor Hilton on the cause of the injury is the best evidence the Crown has in the case. … [T]he following exchange between the Crown and Professor Hilton occurs. The Crown [referring to nine curvilinear abraded bruises to the chest and/or neck] asks Professor Hilton:
'Q You agree that's possibly signs of a struggle?
A: I think they're highly suggestive of there being a struggle. [Is it] … exclusive to that, no, but the distribution and number of them, yes, there could.
Q: Before we were talking about manual strangulation and manual strangulation still plays a significant role in this matter; would you agree with that?
A: Yes.
Q: … manual strangulation requires the hands to go up around the neck area, would you agree with that?
A: Manual strangulation implies the application of force to the neck by one or two hands, or, perhaps, in fact, … more …
Q: So those marks on Mr Guzzetti's chest are consistent, would you agree, with signs of a struggle coincidental with manual strangulation?
A: Coincidental or associated with, yes.'
[32] While this evidence seems, at first glance, sufficient of itself to allow the matter to go to the jury, it must be understood in the context of the whole of the evidence. First, 'consistent with' is used to mean 'not inconsistent with'. Second, Professor Hilton comes to the conclusion, also in cross-examination … :
'I would think the upper trunk, the chest type injuries and the neck type injuries, would be unusual in a fall down the stairs unless that part of the body hits something that was protruding in the course of the said fall.'
The staircase in question had a balustrade (itself described by Professor Hilton as a complex surface) with protruding bollards."
43 I should note that there was also evidence that the wall on the side of the staircase had "jagged bricks", so that it was not only the protruding bollards that could have inflicted some of the deceased's injuries in the case of a fall.
44 His Honour summarised the factual basis of the Crown case (at [34]):
"The Crown relies on what it describes as inferences available from the medical and scientific evidence (already discussed) (namely, the injuries, DNA and blood splattering), the timeline (in particular the alleged 57 minute gap), the tension in the relationship, the lack of any other person with opportunity, the noises heard by the neighbour (and the silence thereafter), together with the financial gain that, it is said, may be motive for the crime. Essentially, the Crown relies upon the facts, set out … above, to allow the drawing of an inference that, from all the possibilities for the means by which these injuries have been caused, the jury should (or may) draw the inference that the deceased was strangled and/or hit over the head (either with the juice extractor component or otherwise) by [PL]. It is unclear in which order this is said to have occurred."
45 The summary of the most pertinent facts is the basis of a circumstantial case. In such a case, the facts are not to be assessed in a piecemeal fashion, as affirmed most recently in The Queen v Hillier [2007] HCA 13; (2007) 228 CLR 618 at [48].