There have been several reports that Adam Lanza spent hours playing violent video games. In our continuing look at the gun debate for PBS’s week-long “After Newtown” special,  Jeffrey Brown explores whether there is any connection between violent video games and violent behavior.

In 2001, 15-year-old Andy Williams opened fire at his high school, killing two classmates and wounding 13. What drove Williams to commit such an act?

Science correspondent Miles O’ Brien spoke with Williams and his father to gain insight into the mind of a rampage killer. Watch the interviews here

Starting tonight, NewsHour will take an intensive look at gun violence, school safety and mental health during a week-long "After Newtown" special.

Above, Coloradans, all too familiar with gun tragedies, weigh in on the gun debate. Learn more here.