Case Details
- Citation: [2021] SGHC 259
- Title: Koh Rong Gui v Public Prosecutor
- Court: High Court of the Republic of Singapore (General Division)
- Decision Date: 18 November 2021
- Judge: Aedit Abdullah J
- Case Number: Magistrate’s Appeal No 9161 of 2019/01
- Coram: Aedit Abdullah J
- Parties: Koh Rong Gui — Public Prosecutor
- Appellant/Applicant: Koh Rong Gui
- Respondent: Public Prosecutor
- Counsel for Appellant: Ravi s/o Madasamy (K K Cheng Law LLC)
- Counsel for Respondent: Lee Zu Zhao and Niranjan Ranjakunalan (Attorney-General’s Chambers)
- Legal Areas: Constitutional Law — Equal protection of the law; Constitutional Law — Judicial power; Criminal Procedure and Sentencing — Sentencing (Mandatory treatment order)
- Statutes Referenced: Misuse of Drugs Act; Criminal Law Reform Act; Criminal Law Reform Act 2019; Criminal Procedure Code; Employment Act; Industrial Relations Act; Land Acquisition Act; Penal Code; (as reflected in the metadata) A of the Misuse of Drugs Act
- Key Procedural Provisions: Criminal Procedure Code (CPC) s 339 (Mandatory treatment orders), including ss 339(3), 339(4), 339(8), 339(9)
- Offences: Intruding upon the privacy of three women (recording videos of cleavage/breasts and upskirt video), punishable under s 509 of the Penal Code (Cap 224, 2008 Rev Ed)
- Sentence at First Instance: 6 weeks’ imprisonment per charge; third and fourth charges consecutive; first and second charges concurrent
- Appeal Scope: Sentence only (conviction appeal abandoned)
- Fresh Evidence: Two psychiatric reports adduced on 5 October 2020
- MTO Suitability Report: Called for and obtained; dated 22 April 2021; psychiatrist found not suitable for MTO
- Core Constitutional Challenge: Alleged infringement of Art 93 (judicial power) and Art 12(1) (equal protection) by the MTO provisions’ “final and conclusive” effect
- Judgment Length: 21 pages; 12,142 words
Summary
Koh Rong Gui v Public Prosecutor [2021] SGHC 259 is a High Court decision addressing the constitutional limits of legislative design in the mandatory treatment order (“MTO”) regime under the Criminal Procedure Code. The appellant, convicted of offences under s 509 of the Penal Code for voyeuristic recordings, sought an MTO on the basis of psychiatric evidence. After an appointed psychiatrist concluded that the statutory criteria for an MTO were not satisfied, the appellant challenged the constitutionality of the MTO provisions, arguing that they improperly constrain judicial power and breach equal protection.
The High Court (Aedit Abdullah J) rejected the constitutional challenge. The court held that the MTO framework does not infringe Art 93 of the Constitution, and it also does not violate Art 12(1). However, the judge noted that “certain consequences follow” from an apparent breach of statutory procedure in the case, indicating that even where the constitutional challenge fails, careful compliance with the CPC’s procedural safeguards remains legally significant.
What Were the Facts of This Case?
The appellant, Koh Rong Gui, was a 45-year-old man convicted after trial of four charges of intruding upon the privacy of three women, contrary to s 509 of the Penal Code. The conduct involved recording videos of the women’s cleavage and breasts for the first three charges and recording an upskirt video for the fourth charge. The incidents occurred at and around Jurong East MRT station, including on an MRT train and at Jurong East Mall, on 10 November 2016, 20 January 2017, and 4 April 2017. He was arrested following the last incident, which took place on an escalator in the mall.
On 10 July 2019, the District Judge sentenced the appellant to six weeks’ imprisonment for each charge. The sentencing structure was such that the sentences for the third and fourth charges were ordered to run consecutively, while the sentences for the first and second charges ran concurrently. Although the appellant initially appealed against both conviction and sentence, he later abandoned the appeal against conviction. The High Court appeal therefore concerned only the sentence.
In the course of the sentencing appeal, the appellant applied to adduce fresh evidence. On 5 October 2020, the High Court allowed the application and admitted two psychiatric reports (the “Appellant’s Reports”). The appellant relied on these reports to argue that he should have been sentenced to an MTO rather than imprisonment. The court then took the further step of calling for an MTO suitability report under s 339 of the CPC on 26 February 2021, applying the approach in GCX v Public Prosecutor [2019] 3 SLR 1325 (“GCX”) and following Ng Hai Chong Brandon v Public Prosecutor [2019] SGHC 107.
The appointed psychiatrist at the Institute of Mental Health (“IMH”) produced a report dated 22 April 2021 (the “MTO Suitability Report”). The psychiatrist diagnosed the appellant with obsessive compulsive disorder and a disorder of hoarding, and found that these illnesses had benefitted from treatment. The psychiatrist also considered that the appellant could comprehend the features of an MTO and had good family support. However, the psychiatrist found no evidence supporting a diagnosis of paraphilia. Crucially, the psychiatrist concluded that there was no contributory factor between the appellant’s psychiatric illnesses and the offences. As a result, the psychiatrist was not satisfied that the requirement in s 339(3)(c) of the CPC was met, which precluded the court from making an MTO under s 339(4).
What Were the Key Legal Issues?
The case raised two principal constitutional issues. First, the appellant argued that the MTO provisions infringed judicial power under Art 93 of the Constitution. His contention was that the appointed psychiatrist’s determination—particularly under s 339(9), which states that the psychiatrist’s report is “final and conclusive” as to the matters in s 339(3)(a), (b) and (c)—effectively removes from the court the adjudication of factual matters that are central to whether an MTO should be imposed. In his view, the court’s discretion to consider an MTO only arises if the psychiatrist finds that the statutory criteria are satisfied, and the court has no power to impose an MTO if the psychiatrist’s report says one or more criteria is not satisfied.
Second, the appellant argued that the MTO provisions breached equal protection under Art 12(1). He framed the complaint as a “reasonable classification” problem: in other legal contexts, psychiatric conditions may function as a defence or mitigating factor, and courts are able to evaluate such conditions. By contrast, in the MTO regime, the appellant argued that the psychiatrist’s conclusions are treated as conclusive, resulting in unequal treatment of offenders with psychiatric conditions.
In addition to the constitutional issues, the appellant also raised a statutory procedural complaint. He argued that the MTO Suitability Report did not comply with s 339(8) of the CPC, which requires the appointed psychiatrist, before making a report, to take into consideration the report made by the psychiatrist engaged by the offender. The appellant’s case was that the appointed psychiatrist relied on multiple sources but did not mention the Appellant’s Reports. He therefore sought a Newton hearing, particularly on whether s 339(3)(c) was satisfied.
How Did the Court Analyse the Issues?
The High Court structured its analysis by considering: (a) the statutory framework of s 339 of the CPC; (b) whether the MTO provisions infringe Art 93; (c) whether they infringe Art 12(1); and (d) the consequences in the case. The court began with the statutory architecture. Under s 339(1), where an offender is convicted and the court is satisfied that, having regard to the circumstances including the nature of the offence and the character of the offender, it is expedient to do so, the court may make an MTO for a period not exceeding 36 months. However, s 339(2) requires the court to call for a report by an appointed psychiatrist before making an MTO.
The key constraints appear in ss 339(3) and (4). A court may make an MTO only if the appointed psychiatrist’s report states that the offender is suffering from a treatable psychiatric condition, is suitable for treatment, and that the psychiatric condition is a contributing factor for the commission of the offence. Conversely, the court must not make an MTO if the report states that the psychiatrist is not satisfied with any of those matters. The “final and conclusive” effect is then provided by s 339(9), which states that the appointed psychiatrist’s report is taken to be final and conclusive as to the matters in s 339(3)(a), (b) and (c). The court also noted the procedural safeguard in s 339(8), requiring the appointed psychiatrist to take into consideration the report made by the psychiatrist engaged by the offender.
On the Art 93 challenge, the court addressed the appellant’s core premise: that the psychiatrist’s opinion is effectively determinative of factual matters that should be adjudicated by the judiciary. The High Court rejected this framing. The court emphasised that the MTO regime does not remove the court’s sentencing function; rather, it sets statutory preconditions for the availability of a particular sentencing option. The court retains the role of deciding whether to call for a report, whether the statutory preconditions are satisfied, and whether an MTO is expedient in the circumstances. The “final and conclusive” effect operates within the legislative scheme to define the evidential and decision-making boundaries for the specific psychiatric criteria required for an MTO.
In doing so, the court relied on prior jurisprudence, including GCX and earlier decisions that had considered the relationship between statutory preconditions and judicial power. The prosecution’s position, which the court accepted, was that statutory preconditions to sentencing do not necessarily intrude into judicial power. The court also treated s 339(9) as a legislative choice about how the psychiatrist’s findings are to be treated for the purposes of the MTO decision, rather than as an impermissible transfer of judicial power to the executive. In short, the court viewed the psychiatrist’s role as a fact-finding or clinical assessment function within a sentencing framework, not as a substitution for the court’s constitutional sentencing authority.
On the Art 12(1) equal protection challenge, the court applied the “reasonable classification” approach. The appellant’s argument was that offenders with psychiatric conditions are treated differently under the MTO regime compared to other contexts where psychiatric conditions may be considered by the court. The High Court found that the classification was not unconstitutional. The MTO regime is designed to ensure that compulsory psychiatric treatment is imposed only where the statutory clinical criteria are met, reflecting the special nature of such treatment and the need for safeguards. The court therefore treated the legislative differentiation as rationally connected to legitimate objectives, rather than arbitrary or discriminatory.
Finally, the court addressed the statutory procedural complaint regarding s 339(8) and the request for a Newton hearing. A Newton hearing is typically sought where there is a dispute about the correctness or reliability of psychiatric evidence or where the court needs clarification on matters that are central to sentencing. While the constitutional challenge failed, the court indicated that “certain consequences follow” from an apparent breach of statutory procedure in the present case. This signals that even where the psychiatrist’s report is statutorily “final and conclusive” for the s 339(3) criteria, compliance with the CPC’s procedural requirements remains mandatory, and failure to comply may affect how the court should proceed in the particular case.
What Was the Outcome?
The High Court dismissed the appellant’s constitutional challenge to the MTO provisions. It held that ss 339(3), 339(4) and 339(9) of the CPC do not infringe Art 93 or Art 12(1) of the Constitution. Accordingly, the appellant was not entitled to the relief of striking down the MTO provisions or requiring the court to conduct a Newton hearing on the constitutional premise that the psychiatrist’s conclusions were not properly determinative.
However, the court also indicated that consequences follow from an apparent breach of statutory procedure. The practical effect is that the decision clarifies that constitutional arguments will not succeed merely because the psychiatrist’s report is “final and conclusive”, but procedural compliance under s 339(8) remains a live issue that can affect the handling of MTO suitability evidence in sentencing appeals.
Why Does This Case Matter?
Koh Rong Gui is significant for practitioners because it confirms the constitutional validity of Singapore’s MTO sentencing framework. Defence counsel often face a difficult strategic choice: even where psychiatric evidence suggests rehabilitative potential, the MTO regime requires satisfaction of specific statutory criteria, including the “contributing factor” requirement in s 339(3)(c). This case underscores that the “final and conclusive” effect in s 339(9) will generally be upheld, and constitutional challenges framed as a transfer of judicial power are unlikely to succeed.
At the same time, the decision is a reminder that procedural safeguards in the CPC are not ornamental. The court’s observation that consequences follow from an apparent breach of statutory procedure highlights that challenges may still be viable on statutory grounds, particularly where the appointed psychiatrist may not have taken into consideration the offender’s own psychiatric report as required by s 339(8). For sentencing appeals, this means that practitioners should carefully scrutinise the content of the MTO Suitability Report for compliance with the statutory process, not only for the substantive clinical conclusions.
From a precedent perspective, the case strengthens the jurisprudential line that statutory preconditions to sentencing can be constitutionally permissible. It also provides guidance on how courts approach the interaction between clinical fact-finding and judicial sentencing discretion. For law students, it offers a clear illustration of how Art 93 and Art 12(1) analyses are conducted in the context of criminal sentencing legislation that involves specialised assessments.
Legislation Referenced
- Criminal Procedure Code (Cap 68) — s 339 (Mandatory treatment orders), including ss 339(2), 339(3), 339(4), 339(8), 339(9)
- Penal Code (Cap 224) — s 509
- Criminal Law Reform Act
- Criminal Law Reform Act 2019
- Misuse of Drugs Act (including “A” as referenced in metadata)
- Employment Act
- Industrial Relations Act
- Land Acquisition Act
Cases Cited
- [2015] SGDC 39
- [2016] SGHC 69
- [2019] SGHC 107
- [2019] 3 SLR 1325 (GCX v Public Prosecutor)
- [2021] SGDC 143
- [2021] SGHC 259 (Koh Rong Gui v Public Prosecutor)
Source Documents
This article analyses [2021] SGHC 259 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the full judgment for the Court's complete reasoning.