of strangulation on the victim, which suggested the cruel manner of Teo's attack on Chong. Murder of schoolgirl Liang Shan Shan On 2 October 1989, a 17-year-old student from Mayflower Secondary School, Liang Shan Shan (also named Leong San San in initial newspaper reports), was reported missing by her parents. She was last seen at her school, boarding her school bus at 1 pm. 12 days later, her highly decomposed body was discovered by NS servicemen undergoing their training exercises at Yishun Industrial Park. Professor Chao Tzee Cheng, who conducted the autopsy on the girl's corpse, could not ascertain the cause of death: he could not tell whether it was a suicide, murder or accident due to the state of decomposition, some body parts were missing and the injuries he found on the skull and ribs were not sufficient to cause death. Nevertheless, the police investigations narrowed down to one suspect: Liang's 35-year-old school bus driver Oh Laye Koh. Oh was then charged with her murder, purely based on circumstantial evidence. He was initially acquitted of her murder at the end of his trial in 1992; however, the prosecution appealed against his acquittal, pointing out how Oh, despite his insistence that he did not kill Liang or know her whereabouts, was able to lead police to the place where Liang's bag and books were, which was some distance away from where her body was found; Oh claimed he went to fix his brakes at 1 pm when the girl was last seen alive, but it was found that he went there at 9 am; and lastly, the school bus driver even contacted and tried to convince the witnesses to testify on his behalf that they did not see his school bus that day. The appeal was accepted, and the re-trial started on 27 April 1994. Oh Laye Koh chose to remain silent when he was told to make his defence. At the end of Oh's re-trial on 3 May 1994, Judicial Commissioner Amarjeet Singh concluded from Oh's decision to remain silent and also his failure to provide evidence "arose from a consciousness of guilt in the face of the circumstantial evidence". In JC Singh's words, he said to Oh in his verdict, "I am constrained to draw an irresistible inference that you were the last person with the deceased and you had intentionally caused her death and that the deceased's