A man was yesterday convicted of ill-treating his girlfriend's six-year-old son, who was taken to hospital with a broken leg after being thrown to the floor and beaten with a stick. Jobless Dickey Ng Kam-biu, 28, had denied two counts of ill-treating the boy in their Yuen Long flat between October 1, 2000, and March 14 last year. Eastern Court magistrate Anthony Yuen Wai-ming said all the prosecution witnesses had been honest and credible. He said the evidence given by defence witnesses, including the boy's mother and his 14-year-old eldest brother, was contradictory. Mr Yuen said the boy and his two elder brothers looked uneasy when testifying and all faced the same dilemma. 'They were very clear and were afraid that if they told the truth, they might lose their mother's care and love,' he said. Mr Yuen said this also explained why in the prosecution case on several occasions the victim was only courageous enough to tell others about Ng's beating when his mother was absent. The magistrate accepted the prosecution had proved beyond reasonable doubt that the boy had been beaten by Ng on different occasions with a stick and a broken broom. The magistrate also accepted Ng had thrown the child to the floor and had once kicked him in his abdomen, making him vomit and causing his nose to bleed. Mr Yuen said the boy's leg injury on March 14 required surgery and a two-month stint in hospital. Considering the force required to break a leg bone, the magistrate believed the injury had been caused by the beating Ng gave him rather than the impact of being thrown to the floor. According to an audio tape submitted by the defendant, the boy's eldest brother had recorded the child saying what he had told the police was a lie. Mr Yuen said the content of the tape was so 'organised and systematic' that it seemed the boy had been coached by his eldest brother. 'I would say what was said on the tape was too good to be the truth . . .' he said. Mr Yuen adjourned sentencing until February 26. Ng was remanded in custody.