O'Reilly, R. v

For manslaughter by provocation, the applicable Sentencing Guidelines Council guidance requires the provocation to be classified as low, substantial or high. A substantial degree of provocation may attract an eight-year custodial starting point. The assessment must reflect the circumstances of the confrontation, including whether the offender pursued the victim rather than faced an immediate attack.

Serious violence may aggravate the sentence, but youth, remorse and an anticipated fear of violence may counterbalance it. Where appropriate, a guilty plea warrants a reduction from the resulting sentence.

The appellant, aged 18, pleaded guilty to manslaughter after fatally stabbing his sister's partner. The victim had violently assaulted and stabbed the appellant's sister shortly before the appellant and his uncle pursued him through neighbouring gardens. The appellant had not taken a knife to the address but picked one up there. The victim suffered multiple stab wounds.

The Crown Court at Liverpool sentenced the appellant on 13 July 2007 to nine years' detention in a young offender institution. With leave of the single judge, he appealed on the ground that the sentence was manifestly excessive.

1. The appeal was allowed. The nine-year sentence was excessive because the judge had adopted too high a starting point.
2. The Sentencing Guidelines Council guidance for manslaughter by reason of provocation applied because the appellant was convicted after 28 November 2005. It divided provocation into low, substantial and high categories.
3. The court agreed that the provocation was substantial. The victim had just inflicted serious violence on the appellant's sister, and there was an anticipated fear that he would use violence. It was not, however, a high-provocation case. The appellant and his co-accused had pursued the victim rather than being pursued by him.
4. The appropriate starting point for substantial provocation was eight years' custody. The numerous and forceful stab wounds were aggravating. The appellant's age, remorse, and the anticipated fear of violence were mitigating. On the particular facts, those factors balanced each other.
5. A 25 per cent reduction for the guilty plea was appropriate. The substituted sentence was therefore six years' detention in a young offender institution.

• Court of Appeal (Criminal Division) — allowed the appeal against sentence and substituted six years' detention in a young offender institution.
• Crown Court at Liverpool — on 13 July 2007 imposed nine years' detention in a young offender institution following the appellant's guilty plea to manslaughter.