High Court of Australia

Nguyen v The Queen [2016] HCA 17

4 May 2016

Case Number: S271/2015


Bell, Gageler, Keane, Nettle, Gordon JJ


Criminal law – Sentencing – Manslaughter – Excessive self-defence – Where deceased a police officer – Where appellant taken to have shot deceased in honest but mistaken belief that deceased was person posing as police officer with intent to rob appellant – Whether sentencing judge erred in assessment of objective gravity of offence by taking into account absence of circumstance which if present would render subject offence a different offence – Relevance of R v De Simoni (1981) 147 CLR 383.

Criminal law – Sentencing – Totality principle – Where appellant convicted of manslaughter and wounding with intent to cause grievous bodily harm – Whether open to sentencing judge to impose wholly concurrent sentences – Whether appellate court erred in partially accumulating sentences – Whether sentence imposed manifestly inadequate.

Words and phrases – "accumulation", "concurrency", "De Simoni principle", "manifestly inadequate", "objective gravity", "totality".

Crimes (Sentencing Procedure) Act 1999 (NSW) – ss 3A(a), 21A(1).

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