Two killings in Toa Payoh
In early 1981, Singapore police investigated the deaths of two children whose bodies were found around housing blocks in Toa Payoh. The later Court of Appeal judgment identifies the victims as Agnes Ng Siew Hock and Ghazali bin Marzuki and records that both were killed in Adrian Lim's flat, first in January and then in February.
The Singapore Academy of Law's legal-history account describes how the discovery of the second victim intensified the investigation. Police followed physical evidence toward Block 12, Lorong 7, where Lim lived with his wife, Tan Mui Choo, and Hoe Kah Hong. The three were arrested and eventually charged with both murders.
An investigation linked the victims to the flat
Police accounts and later retrospective reporting describe investigators finding information in the flat connected to Agnes and Ghazali. The Singapore Police Force later recalled the case as one in which the Special Investigation Section worked continuously after the second killing and arrested the three residents before further planned violence could occur.
The evidentiary record was extensive, but this archive does not repeat graphic descriptions of the children's treatment. The central verified point is that prosecutors brought the two killings together in one case against Lim, Tan and Hoe. They are therefore treated here as one criminal episode rather than split into separate pages simply to increase the archive count.
The 1983 murder trial
The trial became one of the most publicly discussed criminal proceedings in Singapore at the time. The Singapore Academy of Law's oral-history project records that the underlying participation in the killings was not the main contested issue for the defence. Instead, psychiatric evidence and diminished responsibility became central to whether the accused should be held fully criminally responsible for murder.
On May 25, 1983, the High Court rejected the diminished-responsibility defence and convicted Adrian Lim, Tan Mui Choo and Hoe Kah Hong of murder. All three were sentenced to death under the law then applicable.
The appeal by Tan Mui Choo and Hoe Kah Hong
Adrian Lim did not pursue the same appellate challenge, but Tan and Hoe appealed. The resulting decision, Tan Mui Choo and Another v Public Prosecutor [1986] SGCA 10, provides a primary judicial account of the killings and of the psychiatric issues raised for the two appellants.
On August 4, 1986, the Court of Appeal dismissed both appeals. The court held that the evidence did not establish diminished responsibility to the required standard for either woman at the time of the murders. Their convictions and sentences therefore remained in force.
What the appellate judgment establishes
The appellate judgment is especially important because it separates later cultural mythology around the case from the legal findings. It states that Lim, Tan and Hoe had been charged, tried and convicted of murdering the two children and records the dates of the killings as January 24 and February 6, 1981.
The judgment also explains that the prosecution case placed the murders in the context of Lim's anger toward police who had been investigating a rape allegation against him. This page does not convert every statement made during the trial into a settled motive beyond what the judicial record supports. The convictions establish criminal responsibility for the two murders; they do not require the archive to endorse every supernatural or sensational interpretation later attached to the case.
Execution and final legal status
The Singapore Academy of Law records that Adrian Lim, Tan Mui Choo and Hoe Kah Hong were executed at Changi Prison on November 25, 1988. The execution is included only to complete the legal chronology. The archive's solved classification rests on the murder convictions and, for Tan and Hoe, the unsuccessful appeal.
The final legal status is therefore clear: all three were convicted of both murders. Tan and Hoe's challenge to criminal responsibility failed before the Court of Appeal, and no later ruling displaced those convictions.
Remembering Agnes and Ghazali
Later accounts have often focused on Adrian Lim's claimed spiritual practices and on the unusual features of the investigation. That emphasis can obscure that the victims were two children whose deaths devastated their families and alarmed the wider community.
A victim-aware case file does not need to reproduce the most disturbing testimony to explain why the case mattered. The essential history is the disappearance and death of two children, a rapid investigation after the second killing, the arrest of three adults, a lengthy murder trial, the psychiatric defence, and the final appellate decision.
Timeline
January 24–25, 1981: Agnes Ng is killed in Toa Payoh and her body is discovered nearby.
February 6–7, 1981: Ghazali bin Marzuki is killed and his body is found near the same area.
February 1981: police investigation leads to the flat occupied by Adrian Lim, Tan Mui Choo and Hoe Kah Hong; the trio are arrested.
May 25, 1983: the High Court convicts all three defendants of the two murders and sentences them to death.
August 4, 1986: Singapore's Court of Appeal dismisses the appeals brought by Tan Mui Choo and Hoe Kah Hong.
November 25, 1988: Lim, Tan and Hoe are executed at Changi Prison.
Current status
The murders of Agnes Ng and Ghazali Marzuki are Solved / Adjudicated. Adrian Lim, Tan Mui Choo and Hoe Kah Hong were convicted of both killings. Tan and Hoe's appeals were dismissed by the Court of Appeal in 1986, leaving the convictions intact.
Sources
- Singapore Courts — Tan Mui Choo and Another v Public Prosecutor [1986] SGCA 10
- Singapore Academy of Law — Legal Heritage account, Part 1
- Singapore Academy of Law — Legal Heritage account, Part 2
- Singapore Police Force — Police Life retrospective recalling the Special Investigation Section investigation
- The Straits Times — retrospective account produced with Singapore Police Force material