A sex attacker with the mental age of 10 might not have struck again if authorities had given him the support he was supposed to receive, a court heard yesterday. Ng Chi-wa, 30, was jailed for two years after admitting indecently assaulting a woman with a similar mental handicap. Ng molested the woman in his Ap Lei Chau flat on January 22 out of 'sexual frustration' and because he was not getting the psychiatric support he was ordered to receive after a similar crime, defence barrister Wilson Chan Ka-shun told the Court of First Instance. 'He needs long-term psychological and social support,' Mr Chan said. 'He needs support dealing with the hard facts of life.' Ng was released from prison on April 21 last year after serving a two-year sentence for indecently assaulting an 11-year-old girl. A Court of First Instance judge had recommended Ng be examined while in prison and treated. A psychiatrist said Ng should have three years of psychiatric care but treatment ended after only six months. Ng saw the victim while visiting a friend in hospital on January 22. He led the woman to his flat, pushed her on to his bed and molested her. He was arrested two days later when he went to meet the woman, who had already contacted police. He later apologised to the woman's family and said he wanted to marry her. Mr Justice Thomas Gall said a jail term was the only way to protect the public but said Ng should receive psychiatric treatment while in prison and more than six months' care on release.