Facts
4 The matter has quite a long history, which I will endeavour to summarise fairly succinctly.
5 The respondent is a German national, who at all material times has resided in Germany. In 2005 a person known to the respondent in Germany was a person of Vietnamese origin named Tay Duc Phan. In November 2005 the respondent was introduced by Tay Duc Phan to two of his relatives then visiting Germany, who were referred to as Uncle Be and Noah. The respondent was asked by Noah to bring prohibited drugs into Australia and he agreed to do so.
6 In December 2005 the respondent, Tay Duc Phan, Uncle Be and Noah left Germany on separate flights. The respondent flew firstly to Vietnam. In Vietnam he had a meeting with Uncle Be, who gave him instructions on how he was to conduct the importation of drugs into Australia. Packages of drugs were delivered to the respondent and he secreted a number of the packages internally in his body.
7 On 16 December 2005 the respondent arrived at Sydney airport on a flight from Vietnam. He was intercepted by customs officers at the airport and subjected to a scan performed at a hospital which revealed the presence of the packages in his body. On 16 December 2005 the respondent was interviewed by officers of the Australian Federal Police. In the interview he made admissions and implicated the other three persons in the importation of the drugs.
8 The respondent was charged with the offence of importing a marketable quantity of a border-controlled drug. He entered a plea of guilty to this charge.
9 On 20 April 2006 the respondent was interviewed by officers of the Australian Crime Commission. In this interview he identified two persons shown in a photograph as being Tay Duc Phan and the person he knew as Noah.
10 On 30 June 2006 the respondent made a statement in which he described the events in Germany and Vietnam which I have already summarised.
11 On 14 July 2006 the respondent was sentenced in the District Court for the offence to which he had pleaded guilty. Evidence about the information which the respondent had provided to the authorities was put before the sentencing judge. However, the sentencing judge was told that the information had been assessed by law enforcement agencies as being "only of intelligence value" and as being unlikely to result in the prosecution of any person.
12 In his remarks on sentence the sentencing judge said of the respondent "he has given exhaustive evidence, all that he could have done and it should be measured probably in terms of contrition, rather than a great discount, rather than being weighed in terms of assistance". The sentencing judge said that in sentencing the respondent he would adopt a starting point of nine years and would then allow a discount of one third for what he described as the respondent's contrition and, accordingly, he sentenced the respondent to a head sentence of six years with a non-parole period of four years.
13 On 20 December 2006 the respondent was again interviewed by officers of the Australian Crime Commission. He was shown a number of photoboards on which photographs were mounted and he made photographic identifications of the persons known to him as Uncle Be, Noah and Tay Duc Phan. By the end of December 2006 one of the persons identified by the respondent had been arrested and the others were being investigated.
14 On 5 June 2007 the respondent made a statement about the photographic identifications he had made on 20 December 2006.
15 Investigators in the Australian Crime Commission re-assessed the value of the assistance provided by the respondent as having much greater value than the limited value they had believed it to have at the time the respondent was sentenced.
16 On 18 September 2007 the respondent entered into an undertaking to cooperate with law enforcement agencies, which was in the following terms:-
"Undertaking
I, Patrick Springer, do hereby undertake to co-operate with law enforcement agencies, pursuant to section 21E of the Crimes Act 1914 (Cth), and in particular to do the following things:
a. To give full and frank evidence for the Crown in accordance with my statements dated 30 June 2006 (attached and marked "A") and 5 June 2007 (attached and marked "B"), and any other statement(s) to be given in furtherance of this undertaking, in any court proceedings (including confiscation proceedings) that the Crown may nominate, in respect of any person including (but not limited to):
i. Hong Phong Le
ii. Thomas Ty Phuc Lee
iii. Hong Tay Duc Phan
iv. Khanh Hoang Tran
b. To provide to Aaron Bantoft, an Investigator at the Australian Crime Commission, or any other officer nominated by that Agency or any other law enforcement agency, any further full and frank voluntary statement(s) in writing regarding my knowledge of and participation in any matter relating to the charges for which I have been sentenced (or will be re-sentenced), as reasonably required by the Australian Crime Commission.
c. To confer with the Australian Crime Commission, the Commonwealth Director of Public Prosecutions, and counsel briefed by the Director of Public Prosecutions, in relation to any court proceedings referred to at paragraph 2(a) above, and to provide upon request, any supplementary voluntary statement(s) or any further evidence in relation to matters arising from any such conference(s).
d. I acknowledge that my solicitor, Ms P Purcell, has explained to me the provisions of section 21E of the Crimes Act 1914 (Cth) and I acknowledge that I fully understand its effect and the consequences of any failure by me to honour the undertaking."
17 An application was made by the respondent to the Court of Criminal Appeal for leave to appeal against the sentence which had been imposed on him. The respondent sought to have admitted as fresh evidence on the appeal evidence of the events which had happened since he was sentenced.
18 In a decision handed down on 16 October 2007 it was held by the Court of Criminal Appeal that the evidence contended to be fresh evidence should be admitted, that leave to appeal should be granted and that the appeal against sentence should be allowed.
19 In par 32 of his judgment Barr J, who delivered the leading judgment, said:-
"In my opinion this is an exceptional case of the latter kind (that is, a case of fresh evidence to explain facts which were before the sentencing judge so as to put them in a new light). Virtually everything the applicant did in order to assist the authorities to identify and prosecute his co-offenders was done before sentencing, and the Court knew about it. The Court wrongly assessed the material as being only of "intelligence value". The Court reached that conclusion because that was the evidence of the investigators. The fact was, however, that even at that stage the evidence was apt to produce the results it did eventually produce. The applicant had identified the participants, including by photograph, and the investigators were armed to make the inquiries that they later did make. It was not until after sentence, however, that they put to full use the information the applicant had furnished, particularly in the context of the SMS messages of which they had had records all along. So it can be said that although the facts were known on sentencing, their true significance was not. In my opinion the evidence is fresh. The Court should receive it."
20 In par 33 of his judgment Barr J said:-
"…I would allow an overall discount of fifty per cent for all the subjective features, including assistance to the authorities, past and future. Applying that discount to a starting sentence of nine years I would impose an overall sentence of four and one-half years. I would apportion half the discount, that is twenty-five per cent of nine years, to future assistance."
21 The orders actually made by the Court of Criminal Appeal were:-
"1. Grant leave to appeal and allow the appeal.