Thi Thuy Tam Tran v The Queen

Tran was convicted of trafficking in a commercial quantity of heroin and was sentenced to 10 years and 6 months’ imprisonment with a 7 year non-parole period. The appeal against the sentence was dismissed by the High Court. The primary issue before the court was whether the sentence was manifestly excessive or whether it infringed the parity principle given that a co-offender, who trafficked a greater quantity of heroin over a longer period, received a lower head sentence and non-parole period. The court needed to consider if the sentencing differential was reasonably open and if the sentence was within the appropriate range.

The court examined the principles of sentencing in criminal law, particularly the need for consistency and proportionality in sentences. It held that the sentencing differential was reasonably open as the co-offender’s circumstances were different, and the sentences reflected those differences. The court also determined that the sentence for Tran was within the appropriate range for the offence, considering the gravity of the crime and the threshold for a commercial quantity of heroin. The High Court concluded that there was no basis to interfere with the primary judge’s assessment of the appropriate sentence.

Given the findings, the High Court refused Tran's application for special leave to appeal. The sentence of 10 years and 6 months’ imprisonment with a 7 year non-parole period was upheld as appropriate and not manifestly excessive. The court's decision affirmed the importance of judicial discretion in sentencing and the need to consider individual circumstances of each offender.