A HONG KONG businessman murdered in Singapore last week was due to testify in an ICAC case this month involving an alleged $8.5 billion cigarette smuggling ring. One of the defendants is former ICAC informant Henfrey Tin Sau-kwong, friend of sacked ICAC deputy director Alex Tsui Ka-kit. Tommy Chui To-yan's bound, decomposing body was found in a lead-weighted canvas bag floating in the Lion City's harbour on Saturday. His $2.5 million black Porsche, with bloodstains on the driver's seat, was recovered in a car park in New Bridge Centre, which police believe was the murder scene. As a man living in the fast lane, Chui, 38, owned several sports cars and had expensive tastes, neighbours said. He was a member of many high-profile social and recreation clubs including a shooting club. A team of Independent Commission Against Corruption (ICAC) officers led by assistant director Tony Godfrey went to Singapore to help with the investigations soon after being alerted about Chui's disappearance on Wednesday last week and the recovery of his body on Saturday. A police source said Organised Crime and Triad Bureau officers were also examining the circumstances surrounding the murder of Chui. He was reported missing by his wife three days before his body was pulled from the harbour. Mr Godfrey, in charge of the case since investigations began almost two years ago, has been providing the director of Singapore's Criminal Investigation Division Khoo Boon Hui with details of Chui's background and associates. The ICAC case has revolved around the alleged smuggling of cigarettes in Hong Kong, Taiwan and China in a trade worth $8.5 billion. Tin, 45, is charged with corruption-related offences which allegedly took place when he was a Hong Kong Customs officer. Co-accused merchant Chong Tsoi-jun, 49, faces two counts of conspiracy to offer advantages in relation to the processing of export permits for cigarettes and the preferential sale of cigarettes from a tobacco company. A third accused, former Customs officer Yeung Kam-fai, 43, is jointly charged with Tin and Chong on one count each of conspiracy to export unmanifested cigarettes between March 1986 and March 1994, and conspiracy to defraud the Hong Kong Government. Meanwhile, Singapore police have yet to determine the cause of Chui's death. Chui had planned to move into a big house with his wife and two daughters from his $15 million deluxe condominium at the prestigious Shenton Way area. 'We were shocked to hear of his death,' one resident said, adding that his house is on No 14 of the street - not an auspicious number for Chinese. 'We think he should have moved to number 18 instead of 14,' the neighbour said. Chui, who owned a shipping company in Chinatown, was described as a gentle, well-mannered, educated and well-dressed man. His spoken English was excellent. Before being granted Singapore permanent residency, Chui had lived in Canada for a few years. But he decided to live in Singapore for good apparently because of the cold Canadian weather. Chui paid about $50,000 entrance fee to become one of the 700 members of the Swiss Club, in addition to his membership with a local shooting club. 'He was a friendly and easygoing man. I met him and his wife in a welcome cocktail party last year,' Jennette Micheal, administration manager of Swiss Club, said yesterday.