Two days after a South Korean student shot and killed 32 tech students and himself, it's now clear Cho Seung-Hui was filled with anger, but it's not clear where it came from.

Campus police seized the gunman's computers and other personal items. They applied for search warrants for his medical records from the campus health center and an off-campus mental health facility in an effort to find out why the man felt compelled to go on a shooting rampage.

Perhaps the problem was in the brain itself. A Georgetown University researcher studied brain scans of 31 other killers. She found 20 of them had damage in areas crucial to impulse control.

“That part of the brain is called the orbitofrontal cortex, and that seems to be the area particularly critical to our ability to inhibit aggressive impulses," said neurologist Dr. Pamela Blake.

Researchers say a number of things can damage the brain which can cause it to shrink in key emotion centers.  

Norfolk psychologist Dr. Susan Garvey told 13News as tragic as the Tech massacre is, perhaps there is a glimmer of a silver lining because it puts a focus on mental health. And two things it needs are recognition, and even more importantly, treatment.

"We have to be aware there are many people who are mentally ill or have significant mental health issues and that they need to be identified and treated," said Garvey.

While Cho is described as a quiet loner, there were clear signs of trouble well before he went on a shooting rampage.

“Obviously, there was something very wrong with that person, and we need to make sure that we take care of our mentally ill people so that it, this, never happens again," said Garvey.

There is an opportunity for any Virginia Tech students, their families or friends. Child and Family Services of Eastern Virginia is offering free sessions with counselors Friday, April 20th from 6 to 8 p.m. at the Godwin Student Center at Norfolk State University and on Saturday, April 21st from 11 a.m. to 1 p.m. at Virginia Beach Central Library.