Inmate helped facilitate bribe to prison officer for illegal drug smuggling scheme
A corruption case involving inmates and a prison officer has once again raised serious concerns over contraband smuggling and integrity within Singapore’s prison system.
Coordinated Bribery Inside Changi Prison
Wilson Ang, a 38-year-old repeat offender, was sentenced on Feb 2 to eight weeks in jail after pleading guilty to a corruption charge linked to bribery inside Changi Prison. He is scheduled to surrender himself at the State Courts on Feb 19 to begin serving the sentence. Ang had intentionally aided fellow inmate Mohamad Yusof Kasim, also known as Kimo, in giving a $400 bribe to a prison officer to smuggle in medication.
Role of the Prison Officer
The bribe was paid to Mohammad Asri Abd Rahim, a prison officer at the time, who smuggled gabapentin pills into Changi Prison. Court documents revealed that Asri began bringing the painkiller into prison in 2021. Gabapentin, while prescribed for legitimate medical use, can be abused and is classified as a prohibited item within correctional facilities.
Abuse of Trust and Prison Hierarchies
Deputy Public Prosecutor Tay Jia En told the court that Asri initially brought in the pills for selected inmates who served as correctional unit attendants, or CUAs. These inmates assisted him in managing other prisoners. Yusof was one such CUA and later entered into an arrangement with Asri to smuggle contraband, including lewd photographs and medication, in exchange for money.
Ang’s Involvement and Financial Trail
Ang began serving an earlier jail sentence in September 2021 for an undisclosed offence and met Yusof the following month. The two later shared a cell, and Ang became a CUA on Yusof’s recommendation. After failing to obtain gabapentin through prison medical channels, Ang asked Yusof to source the pills from Asri. Ang then arranged for his brother to transfer $4,000 to Yusof, part of which was later used to pay Asri.
Smuggling Operation Uncovered
In May 2022, Asri smuggled at least 50 gabapentin pills into Changi Prison. Five tablets were passed to Ang through another inmate. On June 9, 2022, Yusof handed Asri $400, which investigations later traced back to Ang. Although Asri later expressed his intention to stop the arrangement, a Singapore Prison Service raid on Yusof’s cell uncovered prohibited items, including the pills.
Sentences and Legal Consequences
Asri and Yusof were each sentenced to 10 months’ jail in October 2025. Ang was charged separately and granted bail of $10,000 on Feb 2, 2026. While court documents did not disclose how Ang’s role was uncovered, prosecutors emphasized that such corruption undermines prison security and public trust in the correctional system.
The case underscores the risks posed by corruption within correctional institutions and highlights the Singapore Prison Service’s continued efforts to enforce discipline and accountability. For both Indonesians and Singaporeans observing regional law enforcement standards, the case serves as a reminder that internal controls and integrity remain central to maintaining public confidence in justice systems.
Sources: Straits Times (2026) , Mothership (2026)
Keywords: Changi Prison, Prison Officer Corruption, Gabapentin Smuggling, Singapore Courts, Inmate Bribery
