It is obvious that the imposition of a life sentence is an extreme penalty, the most significant aspect of which is that the offender must be imprisoned for the whole of the remainder of his life, without the possibility of release on parole. A sentence of life imprisonment can only be imposed if the Court is persuaded beyond reasonable doubt that "the community interest in retribution, punishment, community protection and deterrence can only be met through the imposition of that sentence". Accordingly, if it is reasonably possible that the community interest in the specified matters can be met through the imposition of a sentence other than a life sentence, then that other sentence must be passed.
23 In the present case, the circumstances of the crimes themselves demonstrate that they are extremely grave and, taken together, readily fall into the most serious class of murder. On the other hand, the evidence seems to show that they appear to be completely out of character. Certainly, there is nothing in the offender's previous life to suggest any tendency to violence, let alone irrational anger. That being said, however, the extraordinary level of violence used by the offender is cogent evidence of an aspect of his character or personality which, though it had not been evident before, has been demonstrated now.
24 Although I reject the submission of the Crown that the offender had these crimes in contemplation when he bought the baseball bat a short time before 15 September 2003, I do not accept that the attack on Mr Tay was impulsive and it is self-evident that the attack on Mr Tan was premeditated. Any person who so ferociously attacks another human being is plainly very dangerous. It is clear, therefore, that there is a very substantial community interest in protection that can only be satisfied by a very lengthy sentence. I do not, however, think that it follows that the offender is so dangerous that he must remain imprisoned for his lifetime.
25 The statutory scheme of parole has for many years been an important feature of the sentencing regime in this State. Persons who are eligible for parole cannot - in sentences of the kind inevitably to be passed in cases of the present type - be released unless the Parole Authority is satisfied that, having regard to the considerations specified in the Crimes (Administration of Sentencing) Act 1999, in particular s135, it is appropriate to do so. The specified considerations give high priority to the issue of public safety. The longer the sentence to be imposed, the greater the emphasis that needs to be given to the function of parole in sentencing prisoners and the role of the Parole Authority in that respect.
26 The Parole Authority is made up of representatives drawn from a range of interested groups. It includes police, prisons' administration and members of the public. It has highly competent professional advice available to it that enables a rational determination to be made of the risks to public safety which release of any particular prisoner would entail. That information will usually be significantly greater than that which is available to the sentencing court when sentencing an offender. This is especially so, for obvious reasons, when the sentence to be served is a long one. In such a case, the Court must necessarily speculate to a very substantial degree about the character and attributes of the offender at the time when, in due course, he might be freed.
27 This problem is particularly acute, such as here, where the offender is young, or relatively young. In R v Harris (2000) 50 NSWLR 409; (2001) 121 A Crim R 342, Wood CJ at CL made the following very pertinent observations -
"[124] The concerns which exist, in relation to the imposition of indeterminate life sentences, without any option of release on licence or parole, are well known. Such a sentence can be crushing, particularly for a young offender, whose life expectancy, on current tables, may well exceed the fifty-odd years that would apply in the case of the present respondent. They were noted in Garforth (unreported, NSWCCA 23 May 1994), where the Court said:
'But first we should emphasise that we do not intend to diminish the terrible significance of a sentence of life imprisonment. Nor did Newman J. His Honour quoted the following passage from the judgment of Hunt CJ at CL in R v Petroff (unreported, 12 November 1991):
'The indeterminate nature of a life sentence has long been the subject of criticism by penologists and others concerned with the prison system and the punishment of offenders generally. Such a sentence deprives a prisoner of any fixed goal to aim for, it robs him of any incentive and it is personally destructive of his morale. The life sentence imposes intolerable burdens upon most prisoners because of their incarceration for an indeterminate period, and the result of that imposition has been an increased difficulty in their management by the prison authorities.