"Family suspects interference in David Widjaja case"
http://sgforums.com/forums/3317/topics/363855
"However, it appeared the court process was intentionally directed to a conclusion of suicide despite evidence showing a strong possibility of murder, according to David's family and the verification team.
"We have strong evidence that he was murdered but that fact was not brought up in the court," David's father, Hartono Wijaya, told a press conference Tuesday at the National Commission on Human Rights."
[...]
"He added there was a suspicion David's death was related to his research: "Multiview Acquisition from Multi-camera Configuration for Person Adaptive 3D Display".
"His friends said his three-dimensional study could be used for various purposes, either for entertainment or even for military needs."
"And we must not forget that after David's death, there were two unusual deaths at NTU - his professor's assistant *committed suicide' four days later and another researcher was hit by a car 25 days later.""
EDITED: Having read more about the specific case, it seems to me that the official story sounds plausible enough. It's not at all clear whether there was foul play involved.