In cases of premeditated gang violence with weapons committed by youthful first offenders, general and specific deterrence may properly be given paramount weight over rehabilitation, particularly where the offender procured weapons in advance, waited for an opportunity to attack, and targeted a defenceless victim in a public place. A non-parole period of two-thirds of the head sentence does not necessarily indicate error; a non-parole period of half the head sentence usually implies exceptionally good prospects of rehabilitation or some other exceptional factor.
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