In 1999, students, parents and educators were consumed with divergent explanations for the depravity of the shooting at Columbine High School in Littleton, Colorado.
Brian Groner, 27, has been charged with making a terroristic threat three months after he was first charged with the same crime because of statements he allegedly posted about the Columbine massacre.
"She appeared to have died from a self-inflicted wound," Dean Phillips, special agent in charge of the Denver field office of the FBI, confirmed.
The teens had created a hit list, researched bomb-making techniques and were hoarding weapons before their arrest.
Our kids go to school to learn math and science, not how to duck and cover.
'Well, I asked for it,' Manson says in Guardian interview about the backlash that followed his provocations.
Since the deadly events at Columbine High School in 1999, school shootings have become a disturbingly regular occurrence.
U.S. has less than five percent of world's population, but had 31 percent of mass shootings in 1966-2012.
Dr. Peter Langman's new book, released Friday, focuses on understanding for the sake of prevention.
Susan Klebold to write about her son's actions and her involvement in suicide prevention