PUBLIC PROSECUTOR v Soh Jing Zhe & Pong Jia Rong Kenji

Case Details

• Citation: [2024] SGHC 331
• Title: Public Prosecutor v Soh Jing Zhe & Pong Jia Rong Kenji
• Court: High Court (General Division)
• Criminal Case No: Criminal Case No 5 of 2024
• Date of Judgment: 31 December 2024
• Judges: Mavis Chionh Sze Chyi J
• Hearing Dates: 20–21 February, 18 March, 8 July, 30 September 2024
• Plaintiff/Applicant: Public Prosecutor
• Defendants/Respondents: (1) Soh Jing Zhe; (2) Pong Jia Rong Kenji
• Legal Area: Criminal Law; Misuse of Drugs Act offences; Evidence (admissibility of similar fact evidence; adverse inferences)
• Statutory Offences: Trafficking in a Class A controlled drug (Pong); Abetting by intentionally aiding trafficking (Soh)
• Statutes Referenced: Misuse of Drugs Act (Cap 185, 2008 Rev Ed) (“MDA”)
• Cases Cited: Not provided in the extract supplied
• Judgment Length: 100 pages, 30,059 words

Summary

Public Prosecutor v Soh Jing Zhe and another ([2024] SGHC 331) concerned a joint trial arising from a CNB operation that led to the arrest of two accused persons in connection with large quantities of diamorphine. Pong was charged with trafficking in a Class A controlled drug on 14 April 2020, by having in his possession five bundles containing not less than 42.02g of diamorphine for the purpose of trafficking. Soh was jointly tried and charged with abetting by intentionally aiding Pong to traffic the same drug bundles on 13 April 2020.

The High Court (Mavis Chionh Sze Chyi J) convicted both accused after a full trial. The court accepted that the prosecution had proved the essential elements of each charge beyond a reasonable doubt, including the trafficking purpose element for Pong and the facilitating/abetting role for Soh. A central evidential theme was the use of WhatsApp messages between the accused, together with forensic findings (DNA on packaging and containers) and CCTV footage showing movements consistent with the transfer of the drug bundles.

Although the prosecution indicated at the outset that it would rely on the statutory presumption in s 18 of the MDA regarding knowledge of the nature of the drugs, the decisive contest at trial focused on whether the prosecution proved the trafficking purpose element and, for Soh, the intentional aiding element. The court’s reasoning demonstrates how Singapore courts evaluate (i) the admissibility and weight of similar fact evidence, (ii) the interpretation of contemporaneous digital communications, and (iii) the drawing of adverse inferences from inconsistent or shifting explanations.

What Were the Facts of This Case?

The undisputed factual matrix began with CNB’s arrest operation on 14 April 2020. Soh was apprehended while inside a rental car sometime between 5.30pm and 8.45pm. Among the items seized from Soh was a black iPhone (“Soh’s Phone”), which later formed part of the digital evidence base. Pong was arrested later, at or after 8.45pm, in the vicinity of Block 864 Yishun Ave 4. After his arrest, CNB escorted Pong to his flat at #09-33 of Block 864, where officers searched his bedroom in his presence.

During the search, CNB seized the drug bundles from Pong’s bedroom. The bundles were contained in a white plastic bag bearing the word “carter’s” (the “Carter’s Bag”), which was found inside a box labelled with a sticker containing the letters “DHL” (the “DHL Box”). CNB also seized a black iPhone from Pong (“Pong’s Phone”). The phones were sent for forensic examination, and the prosecution extracted 20,149 WhatsApp messages exchanged between Soh and Pong. The oldest messages dated from 15 November 2019, while the most recent messages were sent close to the time of the arrests on 14 April 2020. It was not disputed that the phones belonged to the respective accused and that the messages emanated from them.

Forensic analysis by the Health Sciences Authority (HSA) confirmed that the seized materials contained diamorphine in substantial quantities. The court’s extract indicates that the bundles were marked A1A1 to A1A5, each containing granular/powdery substance with diamorphine content not less than specified quantities, cumulatively amounting to not less than 42.02g of diamorphine for the trafficking charge. The court also relied on DNA evidence. Pong’s DNA profile was found on the interior and exterior of the DHL Box and on the exterior of the Carter’s Bag, while Soh’s DNA profile was found on the packaging of the drug bundles, including tapes and swabs taken from the exhibits and on the interior plastic packaging.

In addition to forensic evidence, the prosecution adduced CCTV footage. One video, dated 13 April 2020 and taken from the lift lobby of Block 126, showed Soh bringing the DHL Box from the seventh floor down to the first floor at around 5.15pm. The court treated this timing as consistent with the transfer of possession of the DHL Box (containing the drug bundles) from Soh to Pong. A second CCTV video, dated 14 April 2020 and taken from the lift lobby of Block 864, showed Pong holding the Carter’s Bag at around 3.33pm. These movements were used to corroborate the narrative derived from the digital communications and the physical evidence.

What Were the Key Legal Issues?

The first key issue concerned Pong’s trafficking charge under the Misuse of Drugs Act. While the prosecution initially indicated it would rely on the presumption in s 18 of the MDA that Pong knew the nature of the drugs in his possession, the court still had to be satisfied beyond a reasonable doubt that Pong possessed the drug bundles for the purpose of trafficking. In other words, the case turned not only on knowledge of the nature of the drugs, but also on the trafficking purpose element.

The second key issue concerned Soh’s abetting charge. Soh was charged with abetting by intentionally aiding Pong to traffic the drug bundles. This required the prosecution to prove that Soh’s conduct amounted to intentional assistance or facilitation of Pong’s trafficking, and that Soh had the requisite mental element—particularly, the knowledge or intention relevant to the aiding conduct. The court therefore had to assess whether the evidence showed more than mere association, and instead demonstrated intentional facilitation linked to the trafficking transaction.

A further evidential issue arose in relation to the admissibility and use of WhatsApp messages. The judgment’s headings indicate that the court addressed “similar fact evidence” and the admissibility of “prior messages”, as well as the application of a “balancing approach”. The court also considered “adverse inferences” against both Soh and Pong. Thus, the legal issues included how to treat prior communications as evidence of state of mind, intention, or pattern, and how to evaluate inconsistencies in the accused’s explanations.

How Did the Court Analyse the Issues?

The court began by setting out the undisputed facts and then focused on the evidential framework used to prove the charges. A significant part of the analysis involved the WhatsApp messages. The judgment extract identifies that the messages were divided into “prior messages” and “material messages”. The prior messages were said to show, in substance, that (1) Soh asked Pong to help him sell heroin; (2) Pong and Soh handled capital quantities of drugs; and (3) Pong performed a heroin drop for Soh. These prior communications were treated as potentially relevant to the accused’s intention and knowledge, but their admissibility and weight required careful judicial control.

At the close of the prosecution’s case, the defence raised a “no case to answer” submission. The court’s headings indicate it applied the established test for whether there was sufficient evidence to establish a prima facie case of each essential element of the charges. This procedural step is important because it frames the court’s assessment of whether the prosecution’s evidence, if accepted, could rationally support a conviction. The court ultimately found that the prosecution had proven the respective charges beyond a reasonable doubt at the conclusion of the trial, but the earlier analysis would have required the court to consider whether the evidence was capable of proving the trafficking purpose and the aiding element.

On admissibility, the court addressed the principles governing similar fact evidence. While the extract does not list the authorities cited, the structure indicates the court applied a balancing approach: it considered whether the prior messages had sufficient relevance to the issues in dispute and whether their probative value outweighed any prejudicial effect. In drug cases, prior communications can be highly probative of intention, knowledge, and the nature of the relationship between accused persons, but they also risk being unfairly prejudicial if used as propensity evidence. The court’s approach reflects the need to ensure that prior conduct is used for a legitimate evidential purpose, such as establishing intent or state of mind, rather than to suggest that because the accused acted similarly before, they must have done so again.

The court then interpreted the “material messages” that were closer in time to the offences. The extract identifies three time windows on 13 and 14 April 2020: (1) 13 April 2020 from 1.45pm to 7.05pm described as Soh’s initial instructions; (2) 13 April 2020 from 8.40pm to midnight described as Soh’s persuasion; and (3) 14 April 2020 from 10:28am to 5.40pm described as Soh’s apparent change of instructions. The court’s analysis of these messages was central to determining (i) Pong’s state of mind regarding the drug bundles and (ii) Soh’s role in facilitating the trafficking.

For Pong, the court’s findings (as reflected in the extract) included that Pong knew the drug bundles were intended for sale, that Pong needed no persuasion to traffic the drug bundles, and that Soh never reneged on his intention to sell the drug bundles. These conclusions suggest that the court read the communications as showing an ongoing trafficking plan rather than a one-off or accidental possession. The court also addressed Pong’s attempt to advance an alternative interpretation of the material messages. This indicates that the defence sought to reframe the communications as something other than trafficking—possibly as safekeeping, misunderstanding, or a belief that the items were not heroin.

For Soh, the court’s analysis focused on the “facilitating act” and the abettor’s knowledge. The CCTV evidence showing Soh bringing the DHL Box on 13 April 2020 at around 5.15pm was corroborative of Soh’s involvement in the transfer of the drug bundles. The DNA evidence further linked Soh to the packaging of the drug bundles. Together, these supported the inference that Soh was not merely present or associated, but actively participated in the chain of possession and transfer. The court’s reasoning also appears to have considered the coherence of the accused’s explanations against the objective evidence.

The judgment extract also highlights that Pong gave multiple versions of events in his investigative statements. Although Pong did not challenge voluntariness or admissibility of the statements, he advanced three different explanations: first, that the drug bundles belonged to a friend (“Ah Cute”) and that Pong had been asked to keep them temporarily; second, that Soh had asked him about Viagra tablets and that Pong had lied to cover for Soh; and third, that Pong had agreed to safekeep the bundles because Soh was a childhood friend, while claiming he believed they contained Viagra tablets and that he had neither seen nor known anything about heroin. The court’s headings indicate it assessed these versions and drew conclusions based on the “totality of the evidence”, including the use of adverse inferences.

Adverse inferences in this context likely arose from the inconsistency between the accused’s accounts and the documentary and physical evidence. Where an accused provides shifting explanations, courts may treat the lack of credibility as supporting the prosecution’s case, especially when the explanations are inconsistent with the accused’s knowledge and the objective forensic and surveillance evidence. The extract’s reference to “bailment defence” suggests that Pong may have argued that he was merely holding the items for another person (a bailment or safekeeping narrative). The court’s rejection of that defence would have required it to find that the evidence showed not mere custody, but possession for trafficking purposes, and that Pong’s purported belief about the nature of the drugs was not credible in light of the communications and forensic findings.

What Was the Outcome?

The High Court convicted both accused persons. Pong was convicted of trafficking in a Class A controlled drug under s 5(1)(a) read with s 5(2) and punishable under s 33(1) of the MDA. Soh was convicted of abetting by intentionally aiding Pong to traffic the drug bundles under s 5(1)(a) read with s 12 and punishable under s 33(1) of the MDA.

Practically, the outcome confirms that where the prosecution proves possession of substantial quantities of diamorphine and links the accused to trafficking intent through contemporaneous digital communications, forensic DNA evidence, and corroborative CCTV, the court will be prepared to reject “safekeeping” or “misidentification” narratives. It also demonstrates that an abettor’s liability can be established through evidence of facilitation and the abettor’s knowledge, even where the abettor is not the person physically found with the drugs at the time of arrest.

Why Does This Case Matter?

This decision is significant for practitioners because it illustrates a structured approach to proving drug trafficking and abetting offences in Singapore. First, it shows how courts treat WhatsApp messages as substantive evidence of intention and state of mind, particularly when the messages are temporally proximate to the alleged offence and are supported by independent corroboration (CCTV and forensic DNA). Second, it demonstrates the court’s willingness to apply a careful evidential framework to prior communications, including admissibility principles for similar fact evidence and a balancing approach to manage prejudice.

For defence counsel, the case underscores the risks of inconsistent explanations. Where an accused provides multiple shifting narratives in investigative statements, courts may draw adverse inferences and treat the explanations as lacking credibility, especially when the objective evidence undermines the defence theory. For prosecution counsel, the case highlights the importance of building a “totality of evidence” narrative: the court’s conclusions were not based on any single strand, but on the convergence of communications, movements, and forensic linkage.

For law students and researchers, the judgment also provides a useful example of how statutory presumptions (such as s 18 of the MDA regarding knowledge of the nature of drugs) interact with the prosecution’s burden to prove other essential elements beyond a reasonable doubt. Even where knowledge is presumed or not seriously contested, the court still requires proof of trafficking purpose and the mental element for abetment. This reinforces a key doctrinal point: presumptions may assist the prosecution, but they do not automatically resolve all elements of the offence.

Legislation Referenced

• Misuse of Drugs Act (Cap 185, 2008 Rev Ed), s 5(1)(a) [CDN] [SSO]
• Misuse of Drugs Act (Cap 185, 2008 Rev Ed), s 5(2) [CDN] [SSO]
• Misuse of Drugs Act (Cap 185, 2008 Rev Ed), s 12 [CDN] [SSO]
• Misuse of Drugs Act (Cap 185, 2008 Rev Ed), s 18 [CDN] [SSO]
• Misuse of Drugs Act (Cap 185, 2008 Rev Ed), s 33(1) [CDN] [SSO]

Cases Cited

• Not provided in the extract supplied.

Source Documents

• Original Judgment (PDF) — Singapore Law Watch
• Archived Copy (PDF) — Litt Law CDN

This article analyses [2024] SGHC 331 for legal research and educational purposes. It does not constitute legal advice. Readers should consult the full judgment for the Court's complete reasoning.