Evidence of events occurring after sentence is passed is generally incapable of demonstrating appealable error unless it sheds new light on material before the sentencing judge at the time of sentencing. Post-sentence assistance to police, however meritorious, does not satisfy this test and must be addressed through the prerogative of mercy rather than the appellate process. Perry J's dissent articulates a broader view that in exceptional cases the court may reconsider a sentence based on post-sentence events, exercising the power sparingly.
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