The largest study of mass shooters ever funded by the U.S. government reveals stunning information about perpetrators.
The first comprehensive assessment of school shooters since Columbine covered 41 shootings between 2008 and 2017.
Eubanks was 17 at the time of the school shooting in Colorado.
Devon Erickson, 18, has been charged with 48 criminal offenses, including for first-degree murder, arson, and theft.
Eighteen-year-old Sol Pais had flown from Florida to Colorado and bought a shotgun.
She forced all Denver-area schools into lockdown a few days ahead of the massacre's 20th anniversary.
How a violent Tumblr meme sparked an online romance that almost ended with the worst mass killing in Canadian history.
On her Tumblr page, she regularly posted memes and photos of famous mass shooters, violent images, and violent quotes.
They understood why I didn't like balloons or felt uneasy in grocery stores or other places that didn't allow me to clearly plot an exit.
It's an ongoing process that doesn't get easier.
A candid conversation with a professor who's actually done the work.
“I need to get the biggest fatality number I possibly can."