The parity principle can ground an appeal where the complaint is insufficient disparity between co-offenders, not only where there is marked disparity. Whether general deterrence should be moderated for a mentally ill offender depends on the nature and severity of symptoms and their effect on mental capacity; where the offender acted with knowledge of the wrongfulness of conduct, general deterrence is not greatly diminished. There is no obligation on a sentencing judge to reduce a sentence for time spent on home detention, and the discretion to do so may properly be declined where the restrictions of home detention were not unduly onerous.
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