SINGAPORE – A Central Narcotics Bureau (CNB) officer and his former colleague at the agency were given jail sentences on Thursday after they worked together to tamper with the urine sample of a drug abuser deemed to be a difficult subject.

Abdul Rahman Kadir, 46, who is under suspension, was sentenced to two years’ jail.

Muhammad Zuhairi Zainuri, 34, who resigned from CNB in February, was sentenced to one year and 10 months’ jail.

Following a trial, the pair were each convicted in September of one count of engaging in a conspiracy to intentionally obstruct the course of justice.

A third officer linked to the case, Mohamed Hafiz Lan, then 41, was sentenced to 18 months’ jail in August 2020 after he pleaded guilty to a similar charge.

In earlier proceedings, Deputy Public Prosecutors Alan Loh and Thiagesh Sukumaran stated in their submissions that drug abuser Maung Moe Min Oo, 32, and a Thai woman were at the Woodlands Checkpoint at around 11pm on Aug 15, 2018, when they were detained for suspected drug consumption.

Maung, who is a Singaporean, knew that he would fail his drug test as he had earlier consumed methamphetamine.

The prosecution said: “As an ex-drug offender who had been sent to a drug rehabilitation centre (DRC) previously, Maung also knew that if his urine again tested positive for illegal drugs, he would be sent to the DRC for a second time.

“Maung feared that if he was sent to the DRC again, his wife would leave him and he would lose custody of his two children.”

While they were in an interview room, Maung asked Abdul Rahman to help him pass an instant urine test (IUT) as he knew that his own urine sample would test positive for methamphetamine.

Meanwhile, Zuhairi left the interview room at 12.17am to speak to Hafiz, and they agreed that they would tamper with Maung’s urine sample by swopping it with another sample that would produce a negativ...