The Crown Appeal
8 It is convenient to deal with the Crown appeal first. As I have said, it is brought under s 5DA of the Criminal Appeal Act, which permits such an appeal where a person's sentence has been reduced because of an undertaking to assist law enforcement authorities and subsequently that person has failed "wholly or partly" to fulfil that undertaking. If the Court is so satisfied, it may "vary the sentence and impose such sentence as it thinks fit": s 5DA(2). Here, the Crown alleges at least a partial failure by the offender to fulfil the undertaking to which I have referred.
9 The offender gave evidence at the trial of Mamae for murder. In chief, he maintained the account of Mamae's involvement which he had given to the police and in evidence at his sentence proceedings, saying that Mamae kicked the deceased to the shoulder area, he thought twice, at the same time as he himself was kicking him. However, he said that at this time he and Mamae were "blind drunk", adding that he was affected to the extent that he did not know what he was doing. This assertion did not sit easily with answers in his police interview to the effect that he was "a little bit" drunk but did know what he was doing.
10 He was cross-examined vigorously by Mamae's counsel and, among other things, reliance was placed on some answers in his interview which were less precise than his evidence at the trial. Asked by police how many times he had seen Mamae kick the deceased, he had said that he was "not sure." Asked at what stage he had seen Mamae kick the deceased, he had said "I think he kicked him when I was." Asked later in the interview where Mamae's first kick had struck the deceased, he had said that he "wasn't really watching", although he went on to say that he saw the second kick connect with the shoulder area. After he was taken to these answers in cross-examination, he agreed with defence counsel that he did not actually see Mamae kick the deceased but assumed he had done so because Mamae was standing near the upper part of his body.
11 This turn of events led to a successful application by the Crown prosecutor under s 38 of the Evidence Act to cross-examine the offender. It is unnecessary to recite the detail of this cross-examination. It is sufficient to say that the offender maintained the concession which he had made to defence counsel. He said that what he had told the police about that matter was not true, explaining that he was "scared" and did not want "to get the blame for the whole lot." He also said that he had understated his level of intoxication to the police because he thought "it would make things worse" if he told them he was "blind drunk." He agreed that he had changed his evidence but could not explain why. He denied that he had done so to assist Mamae's case.
12 Mamae himself gave evidence, the effect of which was that he was in the vicinity when the offender attacked the deceased, but was about two metres away and took no part in the assault. He also denied being a party to a plan to rob the deceased. In the event, the jury found him not guilty of murder but guilty of manslaughter.
13 There is no doubt that the offender failed partly to fulfil his undertaking when he gave evidence at Mamae's trial. On the other hand, even that part of his evidence which was least favourable to the Crown was still of assistance as it contradicted Mamae's account that he was not in a position to have inflicted any injury upon the deceased: an account which the jury clearly rejected. This is so even though on an appeal by Mamae a verdict of acquittal was entered, a matter to which reference is made at the end of these reasons. For that reason, this case is significantly different from other cases which have been before this Court under s 5DA. In three of those cases the respondents had completely resiled from the evidence which it was anticipated they would give against alleged co-offenders: R v O'Brien (CCA, unreported, 10 June 1993), R v Walters (1994) 33 NSWLR 612, R v Bagnall (CCA, unreported, 10 June 1994). In a fourth case the respondent had refused to give evidence at all: R v Compton (CCA, unreported, 29 September 1994).
14 There is another matter which concerns me about this Crown appeal. The combined discount which his Honour allowed for the plea of guilty and the promise of assistance to the authorities was modest, a matter to which I shall return when dealing with the offender's application for leave to appeal against sentence. The most that could be warranted is a minimal increase of the sentence and, for that reason alone, I do not consider that the intervention of this Court is called for.
15 I am mindful that the purpose of an appeal under s 5DA is to enable this Court "to review the sentencing process with the benefit of hindsight" and, if appropriate, to alter the sentence in light of subsequent events which "falsify the basis" on which the sentence was passed: Walters (supra) per Gleeson CJ at 616. I also accept that the principle of double jeopardy affecting appeals by the Crown under s 5D of the Act does not apply in cases such as this. Nevertheless, s 5DA confers a wide discretion upon the Court and, for the reasons I have given, I am satisfied that the proper exercise of that discretion in the present case is to dismiss the Crown appeal.