Ms Yeo's relationship with the offender
35These issues, amongst others, fall to be determined against the background of a relationship between the offender and Ms Yeo that was at one time intimate and loving, but a relationship that devolved to the point where, in the weeks preceding her death, Ms Yeo spoke to family, friends and work colleagues about her gathering concern at the offender's repeated and persistent displays of obsessive behaviour, including his unsolicited advances and repeated attempts to contact her against her express wishes, to the extent where, in the week before she was killed, she sought the advice of a clinical psychologist to address her anxiety and stress.
36It is necessary to refer to that body of evidence, at least in a summary way, to make patent the basis for the conclusion I have reached that there is no reasonable possibility that Ms Yeo would have invited the offender into her unit after dark on 16 July 2012, in particular in circumstances where she knew she would be alone with him and where she was fearful of him.
37The offender and Ms Yeo were both employed by Sanofi Aventis - a pharmaceuticals company. He was the National Pharmacy Channel Development Manager stationed in Brisbane while Ms Yeo was a Pharmaceutical Sales Representative also stationed in Brisbane until she moved to Sydney in April 2012 where she assumed the position of Product Manager.
38It was common ground at trial that the offender and Ms Yeo had been in a sexual relationship, which the offender was conducting extramaritally and which Ms Yeo was also conducting whilst in another relationship, and that the relationship extended over a period of 18 months prior to January 2012 when the offender's wife learnt of the relationship after she chanced upon SMS messages on her husband's phone. The evidence also established that their sexual relationship continued after January 2012, despite the offender's protestations and promises to his wife to the contrary. Ms Yeo terminated her relationship with her fiancé in February 2012.
39A schedule of telephone, email and SMS communications passing between the offender and Ms Yeo after January 2012 reflected Ms Yeo's indecision and prevarication as to whether, and on what terms, she might continue in the relationship with the offender. That evidence also established that the relationship continued after Ms Yeo moved to Sydney in April 2012, when she had told her family and intimated to her friends that the relationship was over.
40However, that same body of evidence also established that by 16 May 2012 Ms Yeo had made the firm and unilateral decision that the relationship was at an end, and that she took considered and determined steps on and after that date to make that plain to the offender. There is no evidence that Ms Yeo initiated contact with him after 17 May 2012 and a considerable body of evidence that she actively avoided him, including ensuring, with the cooperation of her employer and her friends, that he did not know, and could not find out, where she lived.
41By June 2012 Ms Yeo had commenced a new relationship with a man she had known for some years prior to commencing her relationship with the offender. I accept that, by the time of her death, this was an established relationship incorporating future plans for work and travel as a couple. It is not clear by what means the offender learnt of Ms Yeo's new relationship although, after an exchange of SMS messages on 4 June 2012 when they were both in Melbourne on company business, and where she repeatedly refused his invitation to meet with him, to the extent that she eventually told him he was making her anxious because of his persistence, he sent her the following text message:
"Not sure what you have to be anxious about. ?? New job, new city, new boyfriend, all your friends around etc..... You just don't get it !!"
42On 14 June 2012 Ms Yeo sought the intervention of the Human Resources Department at Sanofi Aventis when, after the offender's further unwanted advances and approaches were rebuffed by her, he threatened to damage her reputation in the company by publishing the SMS and email communications they had exchanged during their relationship. On that day a member of the Human Resources Department contacted the offender and instructed him to stop contacting Ms Yeo. It was after that date, with the assistance of the Human Resources Department and the concurrence of her manager, Renee Ward, that Ms Yeo took further steps to distance and insulate herself from any contact with the offender. From mid-June she was advised by management that whenever the offender was scheduled to be in the Sydney offices she should work from home and, where possible, that she should leave the Sydney office before he arrived. On those occasions, including on 4 and 11 July 2012, Ms Yeo was escorted to her car by a colleague.
43During this same time Ms Yeo's family became increasingly concerned about her safety, including the lack of security at her home in light of there being no security door at the entrance to the unit block. Ms Yeo's father twice encouraged Ms Yeo to report the offender's behaviour to the police.
44Motivated by what I am satisfied was the offender's obsessive and vengeful behaviour, on 3 July 2012 he called a female colleague at Sanofi Aventis and, without identifying himself, claimed that Ms Yeo had been having an affair with her husband. Although the woman could not be sure that the caller was the offender, she reported the matter to Ms Yeo who in turn reported it to the Human Resources Department.
45On 5 July, whilst attending Dee Why police station to obtain a national criminal history check for scheduled international travel, Ms Yeo expressed concern to a police officer about someone she described as a work colleague who had become obsessive and hostile. Ms Yeo told the police officer that the man had caused problems for her at work and that he had made threats, including that he would "take [her] down and ruin [her] life".
46On 9 July Ms Yeo expressed concern to Ms Ward about the offender's presence at an upcoming work conference. Ms Ward made arrangements for Ms Yeo to be accommodated in circumstances where she would not be on her own or in an outlying part of the conference centre.
47On 12 July Ms Yeo saw a psychologist, Kerry Borthwick (having been referred through the Sanofi Aventis Employee Assistance Scheme), to address the anxiety and fear that she was experiencing as a result of the offender's conduct. Ms Borthwick administered a Depression, Anxiety and Stress Scale test which revealed that Ms Yeo had moderate depression, extremely severe stress and extremely severe anxiety. Ms Borthwick scheduled another appointment for the following week.
48The evidence also establishes that within days of Ms Yeo's murder, the offender's wife informed him that the marriage was over. Mrs Mulvihill gave evidence that their attempts at reconciliation after January 2012, including marriage counselling were, in her assessment, marred by her husband's deceitful conduct and his persistent lies.
49The offender gave evidence that Ms Yeo telephoned him on 9 or 10 July 2012. He then called his friend, Lynn Paisley, on 13 July 2012 to seek her advice about what he should make of the call and whether she thought it signalled a softening of Ms Yeo's resolve and perhaps a desire to reconcile with him. Ms Traill relied upon this evidence to support the reasonable possibility that the offender went to Ms Yeo's unit on the evening of 16 July 2012 to talk to her and that she invited him inside so that they could talk. In circumstances where there is no record of the call in question being placed or received, and where I consider it extremely unlikely that Ms Yeo would have called the offender for any reason, I place no weight on the offender's evidence that he received a call from her. Although it would be open for me to find that reporting to Ms Paisley that Ms Yeo had called him, and then engaging in a lengthy dialogue with Ms Paisley about it, was part of his elaborate plan to kill Ms Yeo, I am unable to draw that inference adverse to the offender when it is equally consistent with his obsessive ruminations about Ms Yeo, even to the extent of fictionalising to others her continuing interest in him.
50In his evidence at trial the offender accepted that despite what he knew to be Ms Yeo's clear and unambiguous resolve to terminate her relationship with him in May 2012, and despite the fact that he knew that she had taken deliberate steps to ensure he did not know where she lived, he made the decision to go to her home and "see her face-to-face to have that one last final conversation", because he needed "closure". He claimed, however, that despite coming to Sydney early in the afternoon on 16 July for the express purpose of confronting her, he only came to learn of her address when, somewhat serendipitously, after he arrived in Sydney he looked through the tinted windows of her car parked at Sanofi Aventis and saw an envelope addressed to her lying on the seat.
51At trial he denied that his multiple internet searches from late May 2012 up to and including 3 July 2012 (including specific searches on real estate sites, Google maps and White Pages) were directed to finding where she lived. Instead, he claimed, amongst other equally transparent justifications, an interest in Sydney real estate. While there is no evidence in the Crown case as to when and how the offender discovered Ms Yeo's address, I discount entirely that he found it in the circumstances he claimed in his evidence as I do his evidence concerning the internet searches.
52I am also satisfied that on the evening of 16 July 2012 the offender went to Ms Yeo's home twice, on each occasion unannounced, wearing a dark jacket with a hood, and that he did so after taking considered and careful steps to conceal the fact that he had left the hotel where he was staying, including steps designed to permit him to leave from and return to the hotel without notice by chocking open the external fire stairs. The Crown submitted that this conduct, graphically exposed by the hotel's security CCTV cameras, could have been for no other purpose than to construct a false alibi as part of his plan to kill Ms Yeo, well knowing that he would be the primary suspect once her body was discovered. The Crown submitted that the offender's explanation, namely that he wanted to be in a position to deny going to Ms Yeo's unit in the event that she reported him to the Human Resources Department for going to her home to talk to her, was untenable. I accept that submission. In my view, this aspect of the offender's evidence (from which he does not resile on sentence) was a transparent attempt to deal with the incontrovertible force and damaging impact of the CCTV footage.
53That conduct does not, however, compel a finding beyond reasonable doubt that the murder was premeditated. It is also consistent with a plan to force himself upon Ms Yeo at her home and then to deny being there. However, because I have discounted the reasonable possibility that Ms Yeo invited the offender into her unit for the reasons I have discussed, it must therefore follow that he gained entry against her wishes, that being the only available inference for his being inside her unit at all. I regard it as inconceivable that he would force entry or gain entry to Ms Yeo's unit by stealth simply to talk to her, or that once she found him inside her unit, or he forced her inside as she opened the door, she would be willing to talk to him. If I am satisfied that it was in the course of Ms Yeo defending herself against an attack, or threatened attack, that he used her knife intending to kill her, then even if I am unable to find beyond reasonable doubt that the murder was premeditated, to plan to attack a woman in her own home, and to use a knife with that intention, is a murder of very considerable gravity, properly positioned above the middle of the range of objective seriousness.
54Resolution of the dispute about the white chain is relevant to the question of premeditation, equally as it informs the objective seriousness of a murder committed without pre-planning since, on any view, the white chain was capable of being used as a weapon.
55While it was no part of the Crown case at trial that the chain was used to inflict any of the injuries that were revealed on autopsy, the jury were invited to find that the offender took the chain with him as part of his plan to attack and kill Ms Yeo (perhaps to use it as a ligature or a restraint), and that once inside the unit, he determined instead to use a knife to kill her, but that the chain was accidentally dropped as he jumped from the balcony. Again, although it is likely that the jury found that the white chain was taken to the unit by the offender (perhaps as a consequence of, or in the process of, rejecting his evidence as either untruthful or unreliable), a finding on this question is not necessarily embedded in the jury's verdict.
56The Crown submitted that I would reject the offender's evidence that the white chain was not his and accept the evidence of the Mrs Mulvihill that she saw the chain (and a receipt for the purchase of the black hooded jacket the offender was wearing on the night of the murder) in his travel bag before he travelled from Brisbane to Sydney on the day of the murder. The Crown submitted that to accept the evidence of Mrs Mulvihill as truthful and reliable leads inexorably to the conclusion that the offender took the chain into Ms Yeo's unit on the night that he killed her for use as a weapon, thereby explaining the presence of her blood on the chain when it was found. The Crown submitted that finding would entail my rejecting any reasonable possibility that the chain happened to be incidentally lying on the driveway having been dropped or left by someone else, and that Ms Yeo's blood was accidentally transferred from the offender's shoe to the chain as he fled the scene in a state of panic, that being the case he advanced at trial.
57I accept that submission as I do the evidence of Mrs Mulvihill. Ms Traill's attack on Mrs Mulvihill's credit, no doubt on instructions from the offender, to the effect that she had fabricated evidence to falsely implicate her husband in Ms Yeo's murder to secure a property settlement in Family Court proceedings in her favour, was another attempt by the offender to neutralise what he knew was a most incriminating piece of evidence.
58Ms Traill submitted that even were I to find that the offender took the white chain with him, I could not exclude the reasonable possibility that he did so to use it in some way to inflict violence on himself, or to feign doing so. That submission was based upon something the offender said to Mrs Mulvihill when, in advance of the trial, they discussed the fact that she had found the white chain in his luggage and whether she would tell the police. Not only was that conversation denied by the offender (containing as it did an admission that the chain was his), I am satisfied that telling his wife he only took it to use on himself was to conceal his real purpose from her, and perhaps to elicit her sympathy in an attempt to dissuade her from telling the police what she had found.