The force asks itself why Cheung Chi-shum would want to take his own life Colleagues of Assistant Police Commissioner Cheung Chi-shum yesterday expressed disbelief at news of his suicide. They said he appeared to have had a happy family life, was in good health, and was cheerful on the job, despite the pressures of police work. Investigators said they still had no clues to suggest why Cheung would want to kill himself. The death of the marine regional commander, 54, shocked and saddened colleagues who knew him as a pleasant and witty officer who liked to crack jokes. Cheung was found lying beside the swimming pool at Skyview Cliff on Conduit Road at 2.22am yesterday. Police believe he jumped from the rooftop of the adjacent block, Mirror Marina, where he lived. Cheung's neighbours and family members conducted a ceremony at the scene to pay tribute to him yesterday. Among them was his brother, Cheung Che-kwok, the former executive director of the Hong Kong Council on Smoking and Health. Colleagues said Cheung had a happy home and did not have money problems. They added that they had not heard him complaining about his work. It is understood that Cheung, who would have reached retirement age next year, had been offered an extension to his contract with a promotion to the rank of senior assistant commissioner. The move was intended to help fill vacancies to be left by the retirement of the Commissioner Tsang Yam-pui next month and Senior Assistant Commissioner Sidney Chau Foo-cheong next June. Cheung was also said to be health conscious and an active sportsman. He was the chairman of the force's golf club and a member of a police soccer team. The motorcycle enthusiast was in the process of setting up a Harley-Davidson club within the force. Some colleagues said Cheung had lost at least 5kg recently, and that he had told them he had been trimming down. Cheung had not reported any serious illness other than a week-long high fever for an unknown reason several years ago. The commissioner, who commended Cheung as an experienced and capable officer, said he was shocked by his death. 'We've found some notes, but they did not reveal the reasons behind his death,' Mr Tsang said. 'We're actively investigating.' Former senior assistant police commissioner Ng Wai-kit said he remembered Cheung as a decisive and tough officer who could manage crises and pressure well. Cheung's subordinates remembered him as a caring supervisor. Chairman of the Junior Police Officers' Association, Lau Kam-wah, who worked with Cheung at Kowloon East traffic unit a decade ago, recalled how he conducted motorbike patrols despite his rank as a senior superintendent at the time. 'This showed how he cared for colleagues by experiencing their work himself. This was rare for a senior officer to do,' Mr Lau said. The few controversies Cheung was involved in during his 34 years of service included that of the police operation during the Fortune Global Forum in May 2001, when the force was accused of being heavy-handed with protesters. Cheung was assistant commissioner (operations) at the time. The latest controversy in which Cheung was involved related to his 15-year plan to overhaul the marine division, including the possible cutting of 700 officers.