Mustaqim bin Abdul Kadir v Public Prosecutor and another matter [2026] SGCA 15

Case Details

• Citation: [2026] SGCA 15
• Court: Court of Appeal of the Republic of Singapore
• Decision Date: 24 March 2026
• Coram: Tay Yong Kwang JCA, Steven Chong JCA and Judith Prakash SJ
• Case Number: Criminal Appeal No 7 of 2023; Criminal Motion No 11 of 2025
• Hearing Date(s): 5 March 2026
• Appellant: Mustaqim bin Abdul Kadir
• Respondent: Public Prosecutor
• Counsel for Appellant: Andre Darius Jumabhoy, Aristotle Eng (Andre Jumabhoy LLC)
• Counsel for Respondent: Claire Poh, Benedict Chan Wei Qi (Attorney-General’s Chambers (Criminal Justice Division))
• Practice Areas: Criminal Law; Statutory Offences; Criminal Procedure; Adducing Fresh Evidence

Summary

Mustaqim bin Abdul Kadir v Public Prosecutor [2026] SGCA 15 represents a significant appellate clarification on the strictures surrounding the admission of fresh evidence in criminal proceedings and the finality of tactical decisions made by counsel at trial. The appellant, Mustaqim bin Abdul Kadir, had been convicted of a capital charge involving the possession of not less than 56.8g of diamorphine for the purpose of trafficking, an offence under s 5(1)(a) read with s 5(2) of the Misuse of Drugs Act (Cap 185, 2008 Rev Ed). The appeal (CCA 7/2023) was accompanied by a criminal motion (CM 11/2025) seeking to adduce fresh psychiatric and medical evidence to challenge the voluntariness and reliability of several statements made to the Central Narcotics Bureau (CNB).

The Court of Appeal, in a judgment delivered by Steven Chong JCA, dismissed both the motion and the substantive appeal. The primary doctrinal contribution of the decision lies in its robust application of the Ladd v Marshall criteria within the criminal context, particularly the "non-availability" limb. The Court held that where an appellant or their trial counsel makes a conscious, tactical decision not to adduce certain evidence or pursue a specific line of defense at trial—such as an "abnormal state of mind" defense—they are strictly precluded from reversing that position on appeal. This prevents the appellate process from being used as a laboratory for "second bites at the cherry" by disappointed litigants who seek to retrieve lost ground after an unfavorable trial outcome.

Furthermore, the judgment provides essential guidance on the "Inducement Defence" under s 258(3) of the Criminal Procedure Code. The appellant alleged that CNB officers had made promises regarding the avoidance of the death penalty through the explanation of the Mandatory Death Penalty (MDP) Notice. The Court clarified that the mere explanation of the legal framework and the potential for a life sentence under section 33B of the Misuse of Drugs Act 1973 does not constitute an improper inducement. Such communications are viewed as neutral statements of law rather than promises of a specific outcome contingent on a confession.

Ultimately, the Court of Appeal affirmed the trial judge's findings on both the facts and the law. The dismissal of the application to adduce fresh evidence was predicated on the finding that the evidence was not only available at trial but was also immaterial to the eventual outcome. The substantive appeal failed as the appellant could not displace the statutory presumption of trafficking nor successfully challenge the admissibility of his investigative statements. The decision reinforces the high threshold for appellate intervention in factual findings and the sanctity of the trial as the primary forum for the presentation of evidence.

Timeline of Events

1. 25 January 2018: The date preceding the arrest, relevant to the appellant's subsequent claims of drug consumption and physical state.
2. 26 January 2018 (approx. 5.55pm): The appellant is arrested by CNB officers. Staff Sergeant Muhammed Fardlie bin Ramlie records the first contemporaneous statement.
3. 27 January 2018: Recording of further investigative statements following the initial arrest and seizure of the diamorphine.
4. 30 January 2018: Continued recording of statements by CNB investigators while the appellant is in custody.
5. 2 February 2018: A further statement is recorded as part of the ongoing investigation into the 56.8g of diamorphine.
6. 6 February 2018: Investigative procedures continue with the recording of additional statements from the appellant.
7. 9 February 2018: The appellant provides further details to investigators regarding the source and intended destination of the drugs.
8. 11 February 2018: Recording of a statement where the appellant's physical and mental state would later be called into question on appeal.
9. 12 February 2018: The final sequence of investigative statements is recorded during this period of February.
10. 26 February 2018: A statement is recorded, marking the later stages of the initial investigation phase.
11. 8 April 2018: Dr Jacob Rajesh prepares a psychiatric report ("Dr Rajesh’s Report") regarding the appellant's mental state.
12. Trial Proceedings: The appellant is tried for capital drug trafficking. During the trial, the A&E Discharge Summary is admitted and marked as Exhibit P329.
13. 5 March 2026: The substantive hearing of Criminal Appeal No 7 of 2023 and Criminal Motion No 11 of 2025 takes place before the Court of Appeal.
14. 24 March 2026: The Court of Appeal delivers its judgment, dismissing both the motion and the appeal.

What Were the Facts of This Case?

The appellant, Mustaqim bin Abdul Kadir, was charged with a single capital count of possession of not less than 56.8g of diamorphine for the purpose of trafficking. The arrest occurred on 26 January 2018, during which CNB officers recovered the controlled substance, referred to in the proceedings as the "Drugs." The quantity involved—56.8g—significantly exceeded the 15g threshold for the mandatory death penalty under the Misuse of Drugs Act, absent a certificate of substantive assistance and a finding of mere courier status.

The factual matrix centered on the appellant's defense regarding the "Unwanted Drugs." His central contention at trial was that approximately 42.62g of the diamorphine were part of two bundles he had mistakenly received from an individual known as "Zack." The appellant claimed he had intended to return these specific bundles to Zack and therefore did not possess them for the purpose of trafficking. This defense required the appellant to rebut the presumption of trafficking that arose from his possession of the drugs. To support this, the appellant challenged the admissibility of seven statements given to the CNB, including the first contemporaneous statement recorded by Staff Sergeant Muhammed Fardlie bin Ramlie on the day of the arrest. These statements contained admissions that were highly damaging to his "Unwanted Drugs" defense.

The "Inducement Defence" formed a critical part of the appellant's challenge to the statements. He alleged that CNB officers, specifically ASP Yang and others, had made promises or inducements to him. The most significant allegation was that he was told he could avoid the death penalty if he cooperated and admitted to being a courier. This, he argued, rendered his statements involuntary under s 258(3) of the Criminal Procedure Code. The appellant also claimed that he was suffering from drug withdrawal symptoms and a general state of disorientation during the recording of the statements, which affected their reliability and voluntariness.

At the trial level, the Prosecution relied on the testimony of various CNB officers, including SSgt Fardlie and ASP Yang. The defense had access to several medical and psychiatric documents, including an A&E Discharge Summary (marked as Exhibit P329) and a psychiatric report by Dr Jacob Rajesh dated 8 April 2018. Crucially, during the trial, the appellant's counsel made a deliberate decision not to call Dr Rajesh as a witness and did not pursue the argument that the appellant's mental state at the time of the statements was so impaired as to warrant their exclusion. Instead, the trial focused on the alleged inducements and the "Zack" narrative.

In the criminal motion (CM 11/2025) filed alongside the appeal, the appellant sought to adduce "fresh" evidence consisting of the same A&E Discharge Summary, prison medical notes, and Dr Rajesh’s Report. He argued that this evidence would prove he was in an "abnormal state of disorientation and confusion" when the statements were recorded. He further sought to introduce evidence from a Mr Faiz, who was present during part of the investigation, to corroborate his version of the interactions with CNB officers. The Prosecution opposed this, noting that the medical evidence was already available at trial and that the decision not to use it was a tactical one made by the appellant's then-counsel.

What Were the Key Legal Issues?

The case presented two primary clusters of legal issues, one procedural and one substantive, both of which were determinative of the appellant's fate.

The first cluster concerned the admissibility of fresh evidence on appeal. The Court had to determine whether the materials sought to be introduced in CM 11/2025 satisfied the tripartite test in Ladd v Marshall. Specifically:

• Non-availability: Could the evidence have been obtained with reasonable diligence for use at the trial? This involved examining whether the A&E Discharge Summary (P329) and Dr Rajesh's Report were truly "fresh" or merely "forgotten" or "withheld" evidence.
• Materiality: Would the evidence, if admitted, have had an important influence on the result of the case? The Court had to assess if the psychiatric evidence could actually establish an "abnormal state of mind" sufficient to exclude the CNB statements.
• Reliability: Was the evidence apparently credible?

The second cluster involved the substantive challenge to the conviction, focusing on the voluntariness of the CNB statements under s 258(3) of the Criminal Procedure Code. The key issues were:

• The Inducement Defence: Whether the explanation of the Mandatory Death Penalty (MDP) Notice by CNB officers constituted an "inducement, threat or promise" that caused the appellant to make the statements.
• The "Unwanted Drugs" Defence: Whether the appellant had successfully rebutted the presumption of trafficking by showing he intended to return the 42.62g of diamorphine to "Zack."
• Abuse of Process: Whether the appellant's attempt to change his defense strategy on appeal—moving from a focus on inducements to a focus on mental impairment—constituted an abuse of the court's process.

How Did the Court Analyse the Issues?

The Court of Appeal's analysis began with the criminal motion to adduce fresh evidence, as the outcome of that motion would directly impact the substantive appeal. The Court applied the three conditions from Ladd v Marshall [1954] 1 WLR 1489, as adopted in Singapore law through cases like Azuin bin Mohd Tap v Public Prosecutor [2025] 1 SLR 259.

1. The Ladd v Marshall Analysis

Regarding non-availability, the Court found that the appellant failed this limb decisively. The A&E Discharge Summary (P329) was not only available but was actually admitted as an exhibit during the trial. Dr Rajesh’s Report, dated 8 April 2018, was also in the possession of the defense during the trial. The Court noted at [12] that "irrespective of whether the further evidence the appellant seeks to adduce is 'new' or 'fresh', the non-availability condition is not satisfied." The Court emphasized that the appellant's trial counsel had made a conscious decision not to call Dr Rajesh or rely on the "abnormal state of mind" defense. The Court held that a tactical decision at trial cannot be undone on appeal:

"A disappointed party will not be allowed to retrieve lost ground by relying on evidence he should have put before the court below, especially when he has expressly elected to withhold that evidence" (at [19]).

On materiality, the Court held that the evidence was neutral and would not have influenced the outcome. The psychiatric evidence suggested the appellant was "disoriented" but did not establish that his mind was so "shattered" or "unbalanced" that he did not know what he was saying. The Court distinguished this from cases where a medical condition truly vitiates the voluntariness of a statement. The evidence from Mr Faiz was also deemed neutral, as it did not corroborate the appellant's specific claims of inducements.

2. Abuse of Process and Inconsistent Positions

The Court analyzed the appellant's shift in strategy as an abuse of process. Citing Masri Bin Hussain v Public Prosecutor [2025] SGCA 9, the Court observed that the appellant was attempting to run a completely different case on appeal. At trial, the focus was on external inducements by officers; on appeal, the focus shifted to internal mental impairment. The Court relied on Khetani v Kanbi [2006] EWCA Civ 1621 to reinforce the principle that litigants are bound by the way they conduct their case at first instance.

3. The Inducement Defence and the MDP Notice

The Court then turned to the substantive challenge to the statements. The appellant argued that the MDP Notice was used as an inducement. The Court rejected this, following the reasoning in Abdullah v Public Prosecutor [2022] 1 SLR 814 (referred to as "Jumadi"). The Court held that informing an accused person of the legal reality—that cooperation might lead to a life sentence instead of death under section 33B of the Misuse of Drugs Act 1973—is not an inducement. It is a statement of the law. The Court stated at [18] that "it is irrelevant how the MDP Notice was understood or might have been understood by an accused person" if the statement itself is a neutral explanation of the statutory framework.

4. Evaluation of the "Unwanted Drugs" Defence

Finally, the Court reviewed the trial judge's rejection of the "Unwanted Drugs" defense. The trial judge had found the appellant's testimony regarding "Zack" to be inconsistent and contradicted by his own CNB statements. The Court of Appeal found no reason to disturb these factual findings. The appellant's claim that he intended to return 42.62g of the 56.8g of diamorphine was deemed a "bare assertion" unsupported by the objective evidence. The Court noted that the trial judge was entitled to prefer the evidence of ASP Yang over the appellant's version of events, especially given the lack of corroboration for the alleged promises.

The Court also addressed the appellant's reliance on Public Prosecutor v Gunasilan Rajenthiran [2022] 3 SLR 861 regarding the admissibility of police statements. However, the Court found that the procedural safeguards were met and that the statements were both voluntary and reliable. The Court concluded that the appellant had failed to rebut the presumption of trafficking under the Misuse of Drugs Act.

What Was the Outcome?

The Court of Appeal dismissed both the criminal motion (CM 11/2025) and the substantive criminal appeal (CCA 7/2023). The conviction for the capital charge of possession of diamorphine for the purpose of trafficking was upheld, as was the resulting sentence.

The operative conclusion of the Court was stated as follows:

"For the above reasons, we dismissed CM 11 and the appeal in CCA 7." (at [58])

In dismissing the motion to adduce fresh evidence, the Court made it clear that the materials (the A&E Discharge Summary, the prison medical notes, and Dr Rajesh’s Report) did not meet the Ladd v Marshall criteria. Specifically, the Court found that the defense's failure to call Dr Rajesh at trial was a "deliberate tactical decision" which could not be reversed on appeal. The evidence was also found to be immaterial, as it did not provide a sufficient basis to conclude that the appellant's statements were involuntary or that his mental state was impaired to the point of legal significance.

Regarding the substantive appeal, the Court affirmed the trial judge's decision to admit the CNB statements. The "Inducement Defence" failed because the Court found no evidence of any improper promise or threat. The explanation of the MDP Notice was held to be a neutral statement of the law. With the statements admitted, the appellant's "Unwanted Drugs" defense was effectively neutralized by his own prior admissions. The Court found that the appellant had not rebutted the presumption of trafficking in relation to the 56.8g of diamorphine. Consequently, the conviction and the mandatory sentence (subject to the provisions of the MDA) remained undisturbed. No specific orders as to costs were recorded in the extracted metadata, which is standard for criminal appeals of this nature in Singapore.

Why Does This Case Matter?

This judgment is of paramount importance to criminal practitioners in Singapore for several reasons, primarily concerning the finality of trial tactics and the interpretation of investigative procedures.

First, it reinforces the sanctity of the trial process. The Court of Appeal has sent a clear signal that the appellate stage is not a venue for "trial and error" or for correcting perceived tactical mistakes made by counsel at first instance. By strictly applying the "non-availability" limb of Ladd v Marshall, the Court ensures that all relevant evidence must be brought forward at the earliest opportunity. This prevents the "fragmentation" of the legal process where a defendant might withhold certain defenses (like mental impairment) to see if a different defense (like inducement) succeeds, only to attempt to pivot if the first strategy fails. This aligns with the principle of interest reipublicae ut sit finis litium—it is in the interest of the state that there be an end to litigation.

Second, the case provides a definitive stance on the Mandatory Death Penalty (MDP) Notice. Practitioners often grapple with whether the explanation of sentencing consequences by investigators can be construed as an inducement. This judgment clarifies that as long as the officer is accurately and neutrally explaining the statutory framework (specifically section 33B of the Misuse of Drugs Act 1973), it does not constitute an improper inducement under s 258(3) of the CPC. This provides clarity for both the police in their investigative duties and for defense counsel in advising clients on the voluntariness of their statements.

Third, the decision highlights the high threshold for "abnormal state of mind" defenses in the context of statement admissibility. The Court distinguished between mere "disorientation" or "confusion" and a mind that is truly "shattered." This suggests that medical evidence must be extremely compelling to override the presumption of voluntariness, especially when the statements themselves appear coherent and are corroborated by other facts. The Court's reliance on Anan Group (Singapore) Pte Ltd v VTB Bank (Public Joint Stock Co) [2019] 2 SLR 341 and Soh Meiyun v Public Prosecutor [2014] 3 SLR 299 further integrates civil and criminal standards for adducing fresh evidence, emphasizing a unified approach to procedural finality.

Finally, the case serves as a warning regarding abuse of process. The Court's willingness to label a shift in appellate strategy as an abuse of process suggests that the Court will not hesitate to use its inherent powers to protect the integrity of the judicial system from inconsistent positions. This is a critical consideration for any practitioner considering an application for fresh evidence on appeal.

Practice Pointers

• Commit to a Trial Strategy: Counsel must recognize that decisions made at trial—such as whether to call a psychiatric expert or pursue a specific line of cross-examination—are generally binding. A "tactical decision" not to adduce evidence is a bar to adducing that same evidence on appeal.
• Audit All Medical Records Early: Ensure that all medical and psychiatric reports (like the A&E Discharge Summary P329) are fully analyzed before the trial. If there is any evidence of disorientation or withdrawal, it must be raised during the voir dire or the trial proper.
• Distinguish Between Neutral Law and Inducements: When challenging statements based on the MDP Notice, focus on whether the officer went beyond a neutral explanation of s 33B of the MDA and made a specific, unauthorized promise of a life sentence.
• Ladd v Marshall is a High Bar: When filing a motion for fresh evidence, the "non-availability" limb requires a showing of "reasonable diligence." If the evidence existed at the time of trial (even if not in the counsel's physical possession), it will likely fail this limb.
• Avoid Inconsistent Positions: Ensure the theory of the case on appeal is consistent with the theory at trial. Drastic shifts in the "reason" why a statement should be excluded (e.g., moving from "officer promised me" to "I was mentally confused") may be viewed as an abuse of process.
• Verify Witness Neutrality: Before seeking to adduce a new witness (like Mr Faiz) on appeal, ensure their testimony is truly material and not merely "neutral," as neutral evidence fails the materiality limb of Ladd v Marshall.

Subsequent Treatment

As a 2026 decision, Mustaqim bin Abdul Kadir v Public Prosecutor [2026] SGCA 15 stands as a recent and authoritative restatement of the law regarding the admission of fresh evidence in criminal appeals. It follows the doctrinal lineage of Azuin bin Mohd Tap and Masri Bin Hussain, reinforcing a strict approach to procedural finality and the rejection of inconsistent appellate strategies. It is expected to be frequently cited in future criminal motions where appellants seek to introduce psychiatric evidence that was available but not utilized at the trial stage.

Legislation Referenced

• Misuse of Drugs Act (Cap 185, 2008 Rev Ed), ss 5(1)(a), 5(2), 33(1), 33B
• Evidence Act 1893 (2020 Rev Ed), s 136
• Criminal Procedure Code, s 258, s 258(3)

Cases Cited

• [2026] SGCA 15
• [2025] SGCA 9
• Ladd v Marshall [1954] 1 WLR 1489 (Applied)
• Azuin bin Mohd Tap v Public Prosecutor [2025] 1 SLR 259 (Referred to)
• Anan Group (Singapore) Pte Ltd v VTB Bank (Public Joint Stock Co) [2019] 2 SLR 341 (Referred to)
• Soh Meiyun v Public Prosecutor [2014] 3 SLR 299 (Referred to)
• Miya Manik v Public Prosecutor [2021] 2 SLR 1169 (Referred to)
• Public Prosecutor v Gunasilan Rajenthiran [2022] 3 SLR 861 (Referred to)
• Abdullah v Public Prosecutor [2022] 1 SLR 814 (Referred to)
• Khetani v Kanbi [2006] EWCA Civ 1621 (Referred to)

Source Documents

• Original judgment PDF: Download (PDF, hosted on Legal Wires CDN)
• Official eLitigation record: View on elitigation.sg