EIGHTEEN months after Fung Ka-hong was killed in the lift disaster, the 16-year-old's father died of cancer. 'I don't know whether the grief he suffered gave him the deadly disease,' said Ka-hong's brother, Ka-kin, 20. 'But my heart tells me that the death of my brother killed my father. And I want to know - who killed my brother?' he asked. Fung Yuen-chung, 66, devoted much of his attention to the boy and had high hopes for him. 'He always told me he wanted to send the boy to university,' mother Fung Tam Yip-siu, 58, said. After Ka-hong's sudden death, metal-worker Fung was often overcome by emotion and was unable to work. He was diagnosed as having lung cancer three months after the boy's death and stayed in hospital until he died in November. An emotional Mrs Fung said her husband's strength, which had kept him going in the struggle to support his family of six, vanished abruptly after Ka-hong's death. Mrs Fung, who used to work in a plastics factory, has not been well since the accident. 'Visits to the doctor have become my daily routine,' she said. 'I often feel dizzy. The pain in my chest makes me extremely uncomfortable and I can't sleep well at night.' Ka-hong's sister Wong Fung Shui-ling, 29, said the family wanted justice: 'We want to know who was responsible.' Last night, the family said they would wait until sentencing before saying whether they thought justice had been served. The Fungs have moved to a two-bedroom flat in Su Yin House, Tai Wo Hau Estate, near Tsuen Wan. Mr Fung said his mother would need a long time to get over the loss of her son and husband. 'I found myself crying on the MTR shortly after the accident,' he said. 'I knew I needed at least two months to make myself feel at peace again. But the pain she feels inside will take many, many years to forget.' Today, the Fungs' biggest wish is to win enough compensation to see their mother through her twilight years. 'We are trying to survive on the edge of society. We don't know if we can give her a good life,' Ms Wong said. Ka-hong was working at the Java Road site with two schoolmates and a friend while waiting for Form Five exam results from a Kwai Chung technical school. He had taken a $250-a-day holiday job laying pipes without telling his family, pretending instead he was working in a garment factory. When his parents found out, he was told to quit. The Fungs received a $100,000 ex-gratia payment from the Hong Kong and China Gas Company - the owner of the building. Part of it paid for the boy's funeral. An $8,000-a-month compassionate payment is provided by the project builder, the Aoki Corporation.