Kelvin Lim Hock Hin
Prior to his latest arrest in 1996, Lim was jailed twice in 1988 and 1993 respectively for such crimes; 15 months' jail in 1988 and 32 months' jail in 1993. His modus operandi was to gain the trust of his victims as a friend and entice them to have sex with him by offering them free tuition and toys.
Lim's case first attracted widespread attention in 1997 when he was on trial for sexually abusing his two godsons and their three friends, all aged between nine and 13, and he was diagnosed with paedophilia, a sexual disorder which dictates a sexual interest in prepubescent boys. As Lim was assessed to be a chronic paedophile and that his risk of re-offending was high, the veteran judge T. S. Sinnathuray sentenced Lim, then 29 years old, to a total of 40 years' imprisonment, which marked the longest sentence ever imposed in a sexual crime up to that time. Provided by Wikipedia