Between April 1992 and December 1992, there were two cases of taxi drivers being killed in Singapore, specifically at the secluded areas of Yishun. The first was Seing Koo Wan (), a 58-year-old taxi driver who was found with several stab wounds on his body. Despite a police appeal, Seing's killer(s) was never found and the case remained unsolved for eight months before another taxi driver, Teo Kim Hock (张金福 Zhāng Jīnfú), was allegedly kidnapped by two men who demanded a ransom from his family. However, in truth, 59-year-old Teo was killed before the calls for ransom arrived. Upon the arrest of Teo's two killers, the police made connections between the cases of Teo and Seing and concluded that it was committed by the same person(s). The two men - Mohamad Ashiek Salleh (also spelt Mohamed Ashiek Salleh) and Junalis Lumat (also spelt Junalis Lumut) - were both charged with Teo's killing, while Junalis alone faced a second murder charge for Seing's killing. Both men were sentenced to hang by the trial court in March 1994, and they were both put to death at Changi Prison on 16 June 1995. Killing of Seing Koo Wan On 17 April 1992, at the deserted outskirts of Yishun, 58-year-old Seing Koo Wan was found dead inside his taxi, which was abandoned at the area itself. Seing was found with seventeen stab wounds on his body, and no murder weapon was found. The police classified the case as murder, and they did not rule out robbery. According to Seing's widow (a housewife), her husband had worked for twelve years as a taxi driver who worked in the night shift. She stated that her husband would often generously allow free rides for passengers who cannot afford the fare, and he would not have resisted if he ever encountered a robbery. Seing's two sons, aged 22 and 24 respectively, and Seing's own friends and colleagues also stated that Seing was a good father and co-worker and never had grudges with other people, hence they ruled out the killing as one due to hatred, and he was supposed to go to a seminar the day before he was killed. At the time of his death, Seing was survived by his wife and two sons. The unsolved murder of Seing was re-enacted in November of the same year by Crimewatch, in which the police put out a public