An offer to assist the prosecution and give evidence against a co-accused must be an offer to give truthful evidence; fabrications in a statement to police designed to minimise the offender's own culpability can negate any discount for cooperation with authorities, even where the cooperation is otherwise motivated by self-interest rather than contrition. A non-parole period of 20 years for youths who murdered an elderly woman during a home break-in was upheld as within the proper exercise of sentencing discretion under the Young Offenders Act 1993 (SA).
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