the act in another room. Fearing that Tay's daughter and her tutor would be next, Nyu carried the rifle with him and locked the bedroom door upon dashing in. When Sek's repeated requests to open the door was denied by Nyu, Sek immediately fled. Nyu then released Tay's daughter and her tutor. Nyu fled to Malaysia before he surrendered and was extradited to Singapore. Sek was arrested at his sister's home on 29 July, where he attempted suicide when police were closing in on him. Professor Chao, who conducted the autopsy on all three victims, testified that Robert Tay was strangled but the cause of death were the skull fractures resulting from Sek using the chair to bash his death. He said the two female victims died from strangulation; especially for Tay's wife, Chao said that she was already dead when Sek used the chair to bludgeon her head. Nyu was later acquitted of murder, but charged with armed robbery and sentenced to life imprisonment and 6 strokes of the cane. Prior to the Andrew Rd triple murders, Sek had also murdered two other people in Marine Parade by strangling them before disposing their bodies near Seletar Reservoir on 30 June. Sek was found guilty of murder and eventually, he was hanged on 9 December 1988 for the murder of all five victims. 1983 Ang Mo Kio triple murder Known as the Ang Mo Kio triple murder, in a flat where he rented a room, 30-year-old Michael Tan Teow, together with his 26-year-old friend Lim Beng Hai, robbed and murdered Tan's 28-year-old landlady Soh Lee Lee and her two children – 3-year-old Jeremy Yeong and 2-year-old Joyce Yeong. The two men, who were drug addicts, tried to pin the blame on one another for the killings, but nevertheless, both men were convicted of murder and sentenced to death on 10 April 1985. Their subsequent appeals against the death sentence were dismissed. Tan later committed suicide by consuming an overdose of sleeping pills in May 1990, while Lim was eventually hanged on 5 October 1990. Professor Chao stated in the trial of the two men that the mother was stabbed on the neck while she was kneeling down and did not run into the knife, while the daughter was stabbed nine times on the back. The son was pinned down by one of the men and killed by a fatal stab