15 There is no authority which applies the principles, thus expressed by Deane J, to the case of a witness such as Duy Le. Indeed, I heard debate on this topic on two days during the trial, 17 November 2005 and 1 December 2005. On the latter date, when submissions were made in relation to what evidence was capable of corroborating the evidence of Duy Le, Mr O'Doherty, senior counsel for Ian Ferguson, did not press the proposition originally argued by Ms Marjanovic. In my view he was correct not to do so. In Pollitt's case, Deane J was concerned with particular evidence given by the police informer, namely, an alleged confession made to the informer Denning by the accused. In those circumstances a corroboration warning would only have effect if the corroborative evidence were directed to the making of the confession and the subject matter of the alleged confession. Self-evidently those principles do not apply to a witness such as Duy Le.
Loan Tran
16 The second witness in respect of whom it was submitted that I should give a Faure direction is the witness Loan Tran. The main gist of her evidence is to support the testimony of Duy Le that, on a number of occasions, he met with Ferguson and Sadler at various locations, at which they sold him heroin. It was submitted that I should give a Faure direction in relation to Loan Tran because of her relationship with Duy Le, particularly during the period after he had absconded, and because of her perception that she may have been legally implicated in the criminal acts of Duy Le during that period of time. Reliance was also placed on the evidence of Loan Tran that, when she was spoken to by the police in December 2002, she was informed by an inspector that she could be in trouble.
17 On the other hand Mr Tovey QC has submitted that the matters put forward on behalf of Ian Ferguson as requiring a Faure direction are matters well within the understanding of a jury. He submitted that it was not necessary, nor desirable, for a trial judge to give a judicial direction as to how the jury, as the judges of fact, should assess that evidence.
18 The question whether I should give a special direction in relation to the evidence of Loan Tran is not easy to resolve. There is substantial force in Mr Tovey's submission that the matters relied on by Ms Marjanovic are all matters which can be clearly understood by the jury, and taken into account by the jury, without the need for a judicial direction to them. As Callaway JA observed in Weiss,[16] it is important that I, as the trial judge, refrain from giving unnecessary directions, lest I thereby intrude on the exclusive domain of the jury as the sole arbiters of fact.
19 Nonetheless, I have reached the conclusion that there are a number of factors concerning Loan Tran which warrant the need for the jury to exercise special caution when they assess her evidence. Loan Tran occupies a position of some significance in the case, as she is the only eyewitness to the alleged corrupt dealings between Duy Le and members of the Drug Squad, including Ferguson. On any view of her evidence, Loan Tran was living with and associated with Duy Le when, on Duy Le's own admission, Duy Le was an active trafficker of drugs. When Duy Le was arrested in April 1999, Loan Tran attempted to help him obtain bail by contacting a cousin of Duy Le and asking that cousin to locate a quantity of heroin which Duy Le had secreted, and to sell the heroin to raise the amount required for bail. After mid 2000 Loan Tran continued to associate with Duy Le notwithstanding that she knew he was an absconder on the charges then outstanding against him. In his evidence Duy Le stated that Loan Tran knew that he was involved in drugs, and that she knew the full extent of his drug trafficking. On the other hand Loan Tran, in her evidence, has stated that she understood that Duy Le was earning his money from legitimate business activities. On her own evidence Loan Tran was present when, if her evidence is to be accepted, she witnessed Duy Le acquiring drugs from members of the Drug Squad.
20 Thus, when Duy Le was arrested in Sydney in December 2000, Loan Tran was in a position in which she may well have considered herself to be compromised by her prior association with Duy Le. Loan Tran was interviewed by Ceja Task Force investigators on 10 December 2002. At that time Inspector Hardy of the Task Force informed Loan Tran that she could be in trouble, and in cross-examination she acknowledged that at that time she thought she could be in a lot of trouble. Accordingly, when she then proceeded to undergo a tape recorded interview with the investigators, she was in a position where she had serious reason to be concerned about her own position due to her previous association with Duy Le. In those circumstances she was a person who had a motive, or potential motive, to protect her own position by giving false or misleading evidence and if necessary by implicating others in order to protect herself.
21 As I have stated, there is merit in Mr Tovey's submissions that the matters to which I have just adverted are matters which can be readily understood by a jury without the need for judicial direction. However, on balance, and with some hesitation, I have come to the view that I ought to give a direction in relation to the evidence of Loan Tran based on the factors to which I have just referred. In the context of the issues at large in this trial the matters to which I have referred mean that a jury ought not to treat Loan Tran as simply another witness whose credit was under attack. Rather, the jury should take particular care in assessing the evidence of Loan Tran. I cannot be satisfied that, in the absence of a specific judicial direction, the jury would exercise the type of care which, in my view, is requisite in the circumstances of this case. For those reasons I intend to direct the jury that there is a particular danger in relation to the evidence of Loan Tran, which necessitates them to first consider whether the evidence of Loan Tran is corroborated by other independent evidence.
Kenneth Lai
22 Ms Marjanovic submitted that I should also give a Faure direction to the jury in relation to the evidence of Kenneth Lai. He was arrested by the Drug Squad in early 1999. In essence his evidence is that Cox and Sadler endeavoured to persuade him to traffick drugs supplied to him by them in return for a share of the profits of that trafficking. Lai rejected that proposal. The Crown case is that the overture to Lai was the precursor to the successful recruitment by the three alleged conspirators of Duy Le as the person to whom they would traffick drugs.
23 Ms Marjanovic submitted that a Faure direction should be given in relation to Lai because he is what she described as a "criminal informer". However, Lai is not an "informer" in the same category as Duy Le. The latter supplied information to the Ceja Task Force, and gave evidence, pursuant to, initially, an inducement, and, subsequently, an indemnity, in respect of the wrongdoing which he disclosed in the course of his evidence. It is true that Lai was an informer to the Drug Squad who assisted to set up the arrest of Duy Le. However he is not, in the same sense as Duy Le, an "informer" to Ceja Task Force. He has not received an indemnity and there is no evidence that he provided information to the Ceja Task Force pursuant to any "inducement" of the type given to Duy Le.
24 Certainly there are a number of matters in respect of which Kenneth Lai's credit is open to question. He has a background of using and trafficking drugs. He has previous convictions. He does have a background as an informer to the Drug Squad in the manner I have described. However, all of those matters are simply relevant to Lai's credit. They are matters which can be adequately put to the jury by counsel in submission. I have no apprehension that a jury would not be able to fully understand and appreciate the relevance of those matters. I do not consider that it would be appropriate to instruct a jury that they should consider it dangerous to act on the uncorroborated evidence of Kenneth Lai. Such a direction would not be warranted nor necessary according to the principles which I refer to above. Accordingly I shall not give such a direction in relation to Lai.
Corroboration
25 The next question is whether there is evidence capable of corroborating the testimony of Duy Le and Loan Tran. In the course of submissions Mr Tovey proffered a document setting out the items of evidence which he submitted were capable of corroborating both witnesses. Mr O'Doherty, who argued this aspect of the matter on behalf of Ian Ferguson, accepted that some of the matters relied upon by Mr Tovey are capable of constituting corroboration. However, he did argue that some of the matters referred to by Mr Tovey are not capable of constituting corroboration of the evidence of those two witnesses.
Principles of Corroboration
26 The principles relating to corroboration are well established. The classic definition of corroboration is contained in the judgment of the Court of Criminal Appeal in R v Baskerville[17] where the Court stated: