The mother of the teenage boy involved in a New Year's Eve confrontation with police officers which was captured by television cameras has filed a formal complaint to the force over his treatment. The boy was identified by his mother yesterday as 15-year-old Yuen Chi-wai after reporters tracked down the secondary school at which he is a student. His mother, who gave her name only as Mrs Chan, said police had used unnecessary force on him. Chi-wai, a Secondary Three student of the English-medium Chinese Manufacturers' Association Secondary School in Shekkipmei, was filmed apparently exchanging slaps with two policemen on New Year's Eve in Tsim Sha Tsui. Mrs Chan said that she had lodged a complaint with the Complaints Against Police Office mainly because she felt that unfair comments had been made about her son on radio chat shows. A police investigation is now under way. 'Most importantly I want to clarify to police that my son did not hit the officer,' Mrs Chan said. She said officers had pushed Chi-wai and grabbed his neck and he responded by 'returning a few pats'. 'They [the officers] did not hit my son, but I think there was a bit of force used by police. 'For a kid, I think even a bit of force is not appropriate,' she said. Asked if she thought her son was also in the wrong, she said: 'It's up to you to judge. But he's just a kid.' Mrs Chan said that when one of the officers first approached Chi-wai, the officer teased her son, telling him he was just a child. She said the officer asked him: 'Kid, how old are you?' Chi-wai replied 'older than you', and patted the officer's face, Mrs Chan claimed. She admitted that Chi-wai had sworn at the officers during the dispute. On Wednesday, Kowloon West deputy regional commander Henrique Koo Sii-hong gave a different account of the events, saying that the schoolboy had patted an officer's face and wished him 'Happy New Year'. The police have also maintained that no force was used by the officers and said they were only trying to prevent the boy from picking up fluorescent sticks to throw. Chief Superintendent Koo was not available for comment yesterday. However, a police spokesman confirmed a complaint was lodged with the Complaints Against Police Office and an investigation was now being conducted. At the youth's school, a spokeswoman refused to comment when asked whether teachers believed that Chi-wai had done anything wrong, citing a lack of information about the incident. Outside the secondary school, Chi-wai swore at reporters and warned them not to follow him or take his picture. He then ran off.