Student stabs professor in the back

Read the article on the incident where the student stabbed his professor in the back? Here's your chance.
Strange, don't you think, that a student would suddenly stab his professor in the back for no apparent reason. Anyway, it was just a normal session with the professor and David Widjaja suddenly stabbed his professor, slit his own wrists and then jumped off the building and fell to his death. Why? That's the big question. Stress?
It has been revealed that the student, studying in Nanyang Technological University had a scholarship revoked just two weeks ago. That might have been the reason.