THE mother of a man involved in the killing of a kidnapped nine-year-old boy told a jury yesterday her son was 'a good lad'. Yip Chan Hung-ngor said Yip Sun-on, 21, was liked by elderly people and children. 'Your son is a good lad. Is that what you are telling us?' prosecutor Michael Arthur asked. 'Yes,' Mrs Yip said. Yip has pleaded guilty to the kidnap and manslaughter of Wong Wan-hin, who suffocated after being taken away from his school on September 26 last year. He denies murder. His mother, called as a defence witness, said: 'In my experience he gets along well with elderly people, even those as old as 80. They speak of him as a good boy. He gets along well with young children, even as young as three years.' Mrs Yip said she had never known her son do any harm to anyone. She told how she came home from shopping on September 28 last year to find a policeman barring the entrance to her flat. The officer was 'very fierce' and she was scared, the High Court heard. The police were at her home in Kwun Tong to question Yip. Mrs Yip said officers told her Yip had done something against the law and she could not go in. 'I begged him to allow me to go into my flat. But he said it was not possible,' she said. Also in the dock is Yip's friend Wong Wing-yuet, 20. He also denies murder but admits kidnap and manslaughter. The two blamed each other for killing the boy, whose body was found dumped in Tai Mo Shan. The trial, before Mr Justice Stuart-Moore, is expected to end next week.