Consideration and conclusion
40As I have outlined, the basis on which the Crown seeks admission of this evidence is that it establishes a tendency on the part of the accused to act in a particular way, namely to engage in group sex involving a single female and more than one male. Relevantly, s. 97 of the Evidence Act is in the following terms:
97 The tendency rule
(1) Evidence of the character, reputation or conduct of a person, or a tendency that a person has or had, is not admissible to prove that a person has or had a tendency (whether because of the person's character or otherwise) to act in a particular way, or to have a particular state of mind unless:
(a) the party seeking to adduce the evidence gave reasonable notice in writing to each other party of the party's intention to adduce the evidence, and
(b) the court thinks that the evidence will, either by itself or having regard to other evidence adduced or to be adduced by the party seeking to adduce the evidence, have significant probative value.
(2) Subsection (1) (a) does not apply if:
(a) the evidence is adduced in accordance with any directions made by the court under section 100, or
(b) the evidence is adduced to explain or contradict tendency evidence adduced by another party.
41In the present case, no issue arises in terms of the notice which was given by the Crown of its intention to adduce the evidence. Accordingly, the first issue to be determined is whether or not the evidence will, either by itself or having regard to other evidence adduced or to be adduced by the Crown, have significant probative value. The term "probative value" is defined in the Dictionary to the Act in the following terms:
"Probative value of evidence means the extent to which the evidence could rationally affect the assessment of the probability of the existence of a fact in issue."
42I were to come to the view that the evidence did have significant probative value, it would then be necessary for me to consider the further restrictions upon the admission of the evidence which are imposed by s. 101 of the Act:
101 Further restrictions on tendency evidence and coincidence evidence adduced by prosecution
(1) This section only applies in a criminal proceeding and so applies in addition to sections 97 and 98.
(2) Tendency evidence about a defendant, or coincidence evidence about a defendant, that is adduced by the prosecution cannot be used against the defendant unless the probative value of the evidence substantially outweighs any prejudicial effect it may have on the defendant.
(3) This section does not apply to tendency evidence that the prosecution adduces to explain or contradict tendency evidence adduced by the defendant.
(4) This section does not apply to coincidence evidence that the prosecution adduces to explain or contradict coincidence evidence adduced by the defendant.
43In order to admit the evidence I must, in view of the provisions of s. 97(1)(b), come to the conclusion that it has significant probative value. In other words, I must come to the conclusion that the evidence is capable of rationally affecting the probability of the existence of a fact in issue to a significant extent, i.e. to an extent which is greater than that which is required in order to satisfy the test of relevance under s. 55 (see Zaknic Pty v Svelte Corporation Pty Limited (1995) 61 FCR 171 at 175-6; R v Ford [2009] NSWCCA 306 at [50]-[51]; R v PWD [2010] NSWCCA 209 at [66]). Both the probative value of the evidence, and the possibility of its prejudicial effect, must be assessed having regard to the issues in the case (see PWD (supra) at [63]).
44It is not necessary that there be a striking pattern of similarity between the conduct which is established by the evidence said to constitute the tendency, and the conduct which is alleged against the accused (see generally Ford (supra) at [38] and [125]; PWD (supra) at [64]-[65]). However, generally speaking, the closer and more particular the similarities, the more the likely it is that the evidence will have significant probative value.
45The possibility of prejudicial effect with which s. 101 is concerned is the possibility that the jury will act on the evidence otherwise than by way of its rational effect on the probability of a fact in issue, for example by giving effect to some irrational, emotional or illogical response, or by giving the evidence more weight than it truly deserves (see R v Suteski [2002] NSWCCA 509; (2002) 56 NSWLR 182 at [116]). Should it become necessary for me to consider the provisions of s. 101, I must make an assessment of whether the probative value of the evidence substantially outweighs any prejudicial effect that it may have (see R v Ellis [2003] NSWCCA 319; (2003) 58 NSWLR 700 at [94]-[95]. If the evidence satisfies the test posed by s. 101, it will not be excluded under s. 137 (see Ford (supra) at [59]).
46With these principles in mind I turn to consider the evidence in the present case.
47There is some degree of similarity between the conduct which was the subject of discussion between the accused and Thurgood, and the alleged sexual assault of the deceased immediately prior to her death. In particular, there is evidence that both involved group sexual activity with one female and more than one male. That is a relevant consideration, and is one which supports the position of the Crown. Further, the fact that the evidence is sought to be relied upon for the purposes of proving particular conduct on the part of the accused (as opposed, for example, to establishing his identification) also assists the Crown's position (see for example BP (supra) at [112]-[113]).
48However in my view, those matters are substantially outweighed by other factors which reduce the probative value of the evidence to a level that is less than significant. I have reached this view for a number of reasons.
49Firstly, although there is a degree of similarity between the conduct in each case, there is also one significant difference. The incident involving the deceased, on the Crown case, involved sexual intercourse without consent. In contrast, there is not the slightest suggestion in the conversation between the accused and Thurgood that the other incident of group sex was other than consensual. In fact, the inference is to the contrary. This is an important difference, bearing in mind that the probative value of the evidence must be assessed having regard to the issues in the case.
50Secondly, the number of occasions on which a person may have engaged in particular conduct sought to be relied upon as tendency evidence is relevant to an assessment of probative value. I accept that there may well be situations in which it would be open to conclude that an accused person had a tendency to behave in a particular way which he or she may have only demonstrated on very few occasions (see GBF v R [2010] VSCA 135 at [34]). In the present case however, the evidence relied upon is of a single instance of conduct which, as I have noted, differs in a material respect to that relied upon by the Crown in support of its case against the accused.
51Thirdly, the lapse of time between the respective conduct is also relevant to an assessment of the probative value of the evidence (see R v Watkins (2005) NSWCCA 164 at [36]. The Crown case is that the deceased was murdered on or about 1 February 1992. The conversation in which the relevant discussion took place occurred in 2009, some 17 years later. It is evident from those passages of conversation extracted in paragraphs [32] - [34] above that the incident relied upon by the Crown as tendency evidence took place some 10 or 11 years prior to that time, i.e. in or about 1997. That was 5 years after the deceased's murder. In my view, these circumstances operate to further erode the probative value of the evidence.
52The question of the admissibility of tendency evidence is one of fact and degree, to be assessed in the light of the facts and circumstances of the particular case in question (see KRI v R [2011] VSCA 127). For the reasons I have outlined, the facts and circumstances of the present case are such that in my view, the probative value of the evidence is far from significant. The evidence should therefore be excluded.
53Having reached that conclusion, it is not necessary for me to consider the provisions of s. 101.