Public Prosecutor v Ng Whye Quan

The respondent, Ng Whye Quan, was 22 at the time of the offences. He pleaded guilty in the State Courts to several charges, including a charge of rioting under s 147 of the Penal Code 1871 (2020 Rev Ed). Together with five co-offenders, he took a 17-year-old victim to a staircase landing and then to a cemetery, where the victim was assaulted over compensation he was said to owe to two of the group. The victim was later kept at the respondent's flat until 27 November 2024. The respondent committed the rioting offence while on bail for a car theft charge.

One co-offender, referred to as the Accomplice, was 19 and had earlier pleaded guilty to a similar rioting charge before another District Judge and received eight months' imprisonment and one stroke of the cane. Relying on parity, the District Judge sentenced the respondent to 13 months' imprisonment and one stroke of the cane for rioting, giving a global term of 18 months backdated to 7 November 2024. The Public Prosecutor appealed in HC/MA 9089/2025/01, seeking 18 months for the rioting charge.

At the hearing it emerged that the Accomplice had been recalled to the reformative training centre for breaching a supervision order, had been held there from 29 November 2024, and that his sentence, unlike the respondent's, ran only from the date of sentence on 5 June 2025. The prosecution accepted it had not placed these facts before the District Judge.

1. Whether the 13-month sentence for the rioting charge warranted appellate intervention.
2. Whether the parity principle had been correctly applied, given that the Accomplice's sentence was not backdated for his time in custody before sentence.
3. Whether the sentence was out of line with the sentencing benchmark for non-secret society rioting.

The court held that parity must be applied by substance, not by the gross length of the terms. Whether a sentence is backdated for time already spent in custody is a relevant fact that places co-offenders in different positions. The Accomplice had spent about six months in the reformative training centre before he was sentenced, and that time was not credited, so his eight-month term meant roughly 14 months of lost liberty, or about 11 months after the usual one-third remission. The respondent's 13 months, backdated for his remand, meant less real custody than the Accomplice, even though the respondent was older and had reoffended on bail. The District Judge had therefore erred as to the factual basis of the sentence, and the outcome was contrary to the parity principle. The court stressed that the error arose mainly because the prosecution had not given the District Judge the relevant facts, though the judge and defence counsel should also have enquired.

The court did not accept the prosecution's separate argument that parity should carry less weight, noting that the prosecution had itself sought eight months for the Accomplice.

The enhancement was reinforced by Phua Song Hua v Public Prosecutor [2004] SGHC 33, which set 18 to 36 months for non-secret society rioting. Scaled up for the higher statutory maximum and reduced by the 30% guilty plea discount, the range was approximately 17.5 to 35 months. Thirteen months was well below it. Given the respondent's youth and the need for parity, a term at the lower end, 18 months, was fair.

The High Court, See Kee Oon JAD, allowed the prosecution's appeal and enhanced the sentence for the rioting charge from 13 months to 18 months' imprisonment. The global imprisonment term rose from 18 months to 23 months, backdated to 7 November 2024 and excluding the bail period. The other parts of the sentence, including the one stroke of the cane, the fine and the driving disqualification, were unchanged.