A CHILD molester who preyed on young boys yesterday lost his bid for an early release. The Court of Appeal ruled that Ng Kwok-yau's six-year sentence was stiff, but fair. 'What I don't like about this case are the serious threats against these boys,' Mr Justice Bokhary said. 'He not only warned them not to report the attacks, but also threatened to set their houses on fire.' Ng, 30, also threatened to cut off a seven-year-old's penis if he did not obey him. The former voluntary worker for the Caritas Centre and the Henry G. Leong Yau Ma Tei Community Centre admitted five counts of indecent assault on four boys between seven and 14. The offences were committed between January 29, 1991, and June 7 last year. He was jailed on December 19. Mr Justice Bokhary and Mr Justice Power noted Ng's psychiatric reports showed he was not suffering any mental abnormality.