KNOXVILLE (WATE) -- Dr. Helen Smith, a forensic psychologist who's written a book on children who kill, describes Virginia Tech gunman Cho Seung-Hui as a textbook case who displayed every symptom she's seen in most school shooters.

Smith has evaluated thousands of mentally ill children, from kids who make bomb threats to those who have killed. "A lot of these kids feel like nobodys. The first thing they tell me is, they felt powerless."

"The people we have to be more worried about are those young people who keep everything inside and seem like they are pouting and angry yet very withdrawn," Smith says.

Sally Hickey says it's important to talk to your children. "I guess we're all still trying to try to sort through tragedy. I have made an effort to discuss this with my son."

Linda Arbital feels disturbed that society is becoming numb to such killings. "Unfortunately it's not a shock anymore. What I'm concerned about as a parent is where is it going to happen next, not is it going to happen next, but where, and when."

"What we need to realize in this country we have de-institutionalized our mental health system. There are very few facilities for adolescents and young people in this country to go to, to get medication, and treatment."

The administrator of student services, Marty Iroff, says his staff sits through about 45,000 sessions each year. "Our children are bringing all sorts of issues in from home. We call that the static within their heads."

"When children don't feel connected to either their schools or people in the schools, events, or the community, they are not involved, they get depressed and scared and tend to lash out."

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