60 He also told Dr Nielssen that while he was unable to remember whether he had taken any drugs on the day of the offending, he had been injecting amphetamine most days the previous week, and had little sleep.
61 On 3 November 2008, after his arrest, he was assessed by Justice Health following his self report of paranoia and auditory and visual hallucinations. No symptoms of mental illness were noted but emotional lability and hyper vigilance were noted. Since his return to custody he has been maintained on methadone, a moderate dose of an antipsychotic medication and an antidepressant. It would appear that his acceptance of methadone in the treatment of his drug addiction is the first time the offender has sought intervention for his drug use. He reported to both Mr Taylor and Dr Nielssen that he has not previously participated in any drug detoxification or drug rehabilitation programs in custody or in the community. It is not clear whether this was because of resistance or intransigence on his part, or whether he has simply been overlooked as a candidate for intervention by custodial or community based services.
62 The offender was assessed by Mr Taylor in March 2009 as having borderline intellectual functioning which, together with instability in his family relations and retarded emotional development, rendered him vulnerable to substance abuse at an early age. I have already noted that in June 2009 he was diagnosed by Dr Nielssen as suffering from a substance abuse disorder but without any pattern of psychotic symptoms consistent with drug induced schizophrenia. Dr Nielssen regarded the offender's consistent account of amnesia for some days before the offences and afterwards as explained by sustained heavy amphetamine use.
63 In his letter to me the offender says he does not remember anything that happened on the day of the offending and that he does not want to remember or know what he did because he is so horrified by what his lawyers have told him is the evidence in the case against him. He does however accept full responsibility for what he has done and asks me to accept that he is deeply sorry for the pain and suffering he has caused each of the victims and their families.
64 Aside from Dr Nielssen's observation that amphetamine use is known to be associated with increased sexual excitement and a propensity to aggressive behaviour, there was no specific evidence tendered as to the precise pharmacological effects of sustained use of "ice" or other amphetamine based drugs over years, or its concentrated use over days or weeks. Rather, I was invited to take judicial notice of the regrettably all too frequent observations of sentencing courts of the link between the effects of this drug and aggressive and often uncharacteristic violent offending, including sexual offending, of which R v Reyes [2005] NSWCCA 218 and Aslett v R [2006] NSWCCA 360 are just two examples.
65 Having regard to the offender's aboriginality and his subjective circumstances I have been invited to apply the principles in R v Fernando (1992) 76 A Crim R 58 when imposing sentence. Given the very grave criminality for which he is to be sentenced I am of the view that these principles have limited application. In the sentences to be imposed for each of the individual sentences I will, however, make some allowance for the fact that after the death of his father and his effective abandonment by his mother at a vulnerable age, he resorted to alcohol and drugs and, despite concerted attempts from the Aboriginal community to counsel and guide him, he became estranged from his community and from his sister and grandparents. He is reported by a family friend as saying that he believed nobody cared for him and with this attitude (borne no doubt from unresolved feelings of abandonment and his youth) he sought the company of offending peers and the anaesthetising effect of drugs. Over the last ten years he has become progressively institutionalised such that he has failed altogether, it seems, to secure permanent housing or employment for the relatively short periods of time he has been at his liberty before drifting back into a cyclical pattern of offending driven by his drug addiction.
66 I am unable to disregard the offender's drug addiction or his habitual use of "ice" in the days before the offending, as wholly irrelevant to an assessment of the overall objective criminality of the offences for which he is to be sentenced. In particular, I regard the range and extent of his sexual offending as likely to be best explained by the effects of "ice", given that his prior record, despite its length, does not indicate any propensity to sexual violence. I do not consider, however, that this mitigates his criminal responsibility for the reign of sexual terror the victims were subjected to, despite the use of the drug being suggestive of opportunism in the sexual offending, given that I regard the robbery of XX, by which he gained entry to the unit, was likely to have been primarily motivated by his need for money to feed his drug addiction and that the robbery of JH was perpetrated upon leaving the unit for the same reason. The fact of his drug addiction is not, however, a mitigating factor per se of any weight in the sentencing exercise. That said, in accordance with the principles articulated by Wood CJ at CL in R v Henry [1999] NSWCCA 111; 46 NSWLR 346 at [272]-[274], I accept that his capacity for exercising judgment was probably severely compromised by being in the grips of the drug "ice" on the day of the offending, and that the origins of his drug addiction was when he was unable to exercise appropriate judgment or choice because of his youth and family circumstances.
67 In March 2010 Dr Nielssen reported an improvement in the offender's psychiatric condition and his compliance with the pharmacological regime instituted by Justice Health since his remand. While the florid effects of his amphetamine use have abated, excessive concern with his personal hygiene, a likely reaction to his past drug use, was noted.
68 Dr Nielssen was unable to provide any meaningful estimate of the risk of the offender committing further offences upon his eventual release given the likely length of the sentence. He did note, however, that despite the lack of success of previous attempts at custodial rehabilitation, the offender's basic literacy and intelligence places him in the lower half of the normal range of intelligence, rather than in the borderline mentally retarded range, which could assist him to meaningfully participate in rehabilitation programs in custody. He also expressed to Dr Nielssen what Dr Nielssen regarded as sincere remorse and horror at his conduct, which could be the basis for self-reflection and eventual rehabilitation.
69 Despite these views, I am unable to find as mitigating factors under s 21A(3)(g) or (h) of the Sentencing Act that his prospects of rehabilitation are good or that he is unlikely to reoffend.