Killing of Nonoi (2006)
When two-year-old Nurasyura Mohamed Fauzi went missing, her stepdad Mohammed Ali Johari joined the search. But it was he who had murdered her, and hidden the body.
Yishun triple murder (2008)
A tumultuous love affair ends with Chinese national Wang Zhijian going on a murderous rampage one night, killing his lover, her daughter and a flatmate after a quarrel over money for crab.