The previous week, National University of Singapore undergraduate Andy Lee, 24, whom prosecutors say sexually abused three teenage boys in Housing Board lifts, appeared in court to face charges.

And on April 24, full-time national serviceman Huang Shiyou, 22, a serial sex predator, was jailed for 32 years for sexual assault and attempted rape. He would trail young girls into lifts, threaten them with a penknife and proceed to maul them either in the lifts or in stairways nearby. His nine victims were aged from nine to 14.

Read the full story in Thursday's edition of The Straits Times.