Groups that help victims of child abuse say the jailing of a tutor for molesting his teenage pupil shows there is an urgent need to establish a sex offenders' register in Hong Kong. Sam Chiu Nam-sum was jailed for five years yesterday - his third prison term since 1987. Chiu had 18 previous convictions and was last released from jail in February 2003. In 2000, he was jailed for four years for molesting three boys who attended a tutorial school he had set up with his wife. Chiu said he started to molest under-age boys while working as a part-time tutor in 1986. He stopped attending counselling sessions after he was released in 2003, and failed to follow a psychologist's advice that he should not become another child's godfather after regaining his freedom. Priscilla Lui Tsang Sun-kai, director of Against Child Abuse, said a register of sex offenders was vital. 'We need to prevent people such as paedophiles ... from getting a job which allows contact with children,' she said. 'We need such a register to conduct background checks on job seekers.' Katy Lo, executive director of the End Child Sexual Abuse Foundation, also called for a register. Efforts to press the government to set up a register over the past few years have made little progress as proponents and opponents became locked in rounds of debates. A consultation on a possible register was launched in July by the Law Reform Commission.