Initially, all six attackers were charged with murder. However, after considering the role each attacker had played in the assault, the murder charges against the Tan brothers, Ng and Ong were reduced to rioting. They were later each sentenced to two years' jail and four
strokes of the cane. As Koh was the only one who stabbed Tay, he would face the murder charge alone. On 9 April 1990, Koh Swee Beng stood trial for the murder of Tay Kim Teck. The trial was heard by
Judicial Commissioner (JC)
Chan Sek Keong and judicial member
Tan Teow Yeow. The trial prosecutor was Lee Sing Lit and Koh's defence lawyer was Kelvin Lim. Professor
Chao Tzee Cheng, who examined Tay's body after his death, testified that Tay sustained a total of 16 injuries. Two of these injuries, one stab wound to the front chest and another to the left back chest, were sufficient in the ordinary course of nature to cause death. The defence argued that Koh had been provoked indirectly by Tay due to his assault on Tan; Koh had lost his self-control upon hearing about Tay's assault, and this was exacerbated by Tay's aggressive attitude and use of vulgarities. On 20 April 1990, the trial judges found Koh found guilty of murder and sentenced him to the mandatory death penalty. They found that when Koh first heard about the assault on Tan, he had not completely lost his self-control, as was shown in two instances. Firstly, Tay had used vulgarities on Koh, but Koh was still able to tell Tan Eng Geok to snatch the stools which Tay was holding. Secondly, when Koh caught up with Tay after chasing him with the group, Tay was already on the ground blocking attacks from the other five men; yet Koh still chose to stab Tay without any sudden provocation by Tay. Koh subsequently appealed his sentence and was represented by lawyer Peter Fernando for his appeal; however his appeal was rejected in September 1991. == Clemency ==