Mental health experts say it is not unusual for a mental illnesses to first show up in college because that new environment can trigger a lot of stress in making new friends and learning to cope with new pressures.
However some mental health professionals are concerned this massacre may imply that people with a mental illness are violent when in fact most are not.
"It shines a light in a way that only reinforces ignorance and discrimination, and so I'm very concerned about that," says David Sernmental of Health America
Instead of just focusing on how dangerous students like Cho Seung-Hui slip through the cracks the group known as Mental Health America is worried now that every person with a mental illness, which includes depression will be viewed as a threat.
Dr. Jonathan Kandell heads the University of Maryland's Threat Assessment Team and he says it's almost impossible to identify who will turn violent.
By the way, even when a student comes in for treatment, federal law prohibits schools from sharing any of their mental health records with the parents.