A sentence of seven years' imprisonment (with five and a half years cumulated on an existing three-year sentence, yielding a total effective sentence of eight and a half years with a six-year non-parole period) was within range for a serious example of aggravated carjacking committed in company by an 18-year-old with prior convictions and bleak rehabilitation prospects. Armed robbery sentencing cases are not comparable to aggravated carjacking cases. There is no fixed ratio between the non-parole period and the head sentence.
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