Martin, R v

When fixing the minimum term for a murderer aged just over 18, the statutory starting point in Schedule 21 is the required first stage but is not determinative. The sentencing court must assess the offender’s maturity, culpability and the seriousness of the crime. A substantial reduction from the adult starting point may be justified where relative youth affects culpability. The exercise is not mathematical, but should maintain consistency across the statutory framework and then give proper weight to aggravating and mitigating features.

The appellant, aged 18 years and three months, was convicted at Lewes Crown Court of murder and unlawful wounding. He had returned to the scene of an earlier disagreement carrying nunchucks, struck a 15-year-old boy once to the head, and caused a fatal brain injury. The trial judge imposed life imprisonment and set a minimum term of 15 years, less time spent on remand.

The appellant challenged only the minimum term. He relied principally on his proximity to age 18, immaturity, lack of relevant convictions, absence of an intention to kill, and the limited planning of the attack. The issue was the proper application of the age-related starting points in Schedule 21 to the Criminal Justice Act 2003.

1. Appeal allowed to a limited extent. The court substituted a minimum term of 13 years, less 295 days spent on remand.

2. Schedule 21 to the Criminal Justice Act 2003 required the judge first to use the 15-year starting point because the appellant was over 18 when he committed the murder. It also required the judge to treat age as a mitigating factor where appropriate.

3. Following R v Peters [2005] EWCA Crim 605, the court held that an offender’s eighteenth birthday creates no sudden acceleration in culpability or sentence. The statutory age thresholds are bright lines for selecting the starting point, but sentencing must reflect the offender’s actual maturity, insight and understanding. The resulting assessment is a balancing exercise, not a mathematical scale.

4. The murder was wholly unnecessary, mindless and brutal. The appellant’s return with a potentially lethal weapon was an aggravating feature, although he did not intend to kill. He was, however, only 12 weeks over 18. Balancing that proximity to the lower age threshold with the circumstances of the offence justified reducing the minimum term from 15 to 13 years.

• Court of Appeal (Criminal Division): Allowed the sentence appeal to the extent of substituting a 13-year minimum term.

• Lewes Crown Court: The appellant was convicted of murder and unlawful wounding and sentenced to life imprisonment, with a 15-year minimum term less 295 days on remand.