"We have to be attuned to the early warning signs so that we can get people the support that they need," a researcher told Newsweek.
Fieger has represented families in cases involving the Columbine school shooting and the Flint, Michigan, water crisis.
Police in Florida said they arrested a 19-year-old for allegedly "plotting to shoot up the campus on the final day at the school before winter break."
Recorded calls show that several of the NRA's lobbyists were worried that the Columbine shooting would create a massive crisis for the gun rights organization and its agenda.
Investigators said they found text messages on the girl's phone in which she said "this shooting will be her way to 'make my mark on society.'"
The students allegedly said that they wanted "everything to go down" like the 1999 Columbine massacre, in which 13 people were murdered and 21 injured.
"We as a country cannot come together just accepting this as a way of life," Frank DeAngelis told Newsweek.
"People are going to be in recovery long after the cameras go away," Heather Martin told Newsweek after a gunman killed 10 people at a supermarket in Colorado.
The National Rifle Association called Boulder's assault weapons ban "counterproductive" and rejoiced when a judge overturned it. Will Monday's massacre change the politics of gun control?
The state has experienced some of the country's most infamous mass shootings, including Columbine and Aurora.
The suspect is alleged to have gained access to an online conference call and shouted, "Going to shoot your kid in the 2020 Columbine remake."
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.