Columbine

Best practices include placing officers on campus, controlling access points and adopting a layered approach to keep out weapons

It takes a community to help a troubled kid – before they shoot up a school

The woman was already dead of a self-inflicted gunshot wound by the time authorities launched a manhunt

When responding to an active shooter incident, you need the right stuff, you need to take out the right target and you need to address the threat right now

While hindsight is 20/20, looking back over the last 20 years we can identify several red flags that could have been raised on the Columbine shooters

Police response to school shooters has changed dramatically since Columbine, but what work remains to be done to protect our schools?

“Columbine today is a model and example of resiliency,” current principal Scott Christy said

Officials say the woman was found dead from an apparent self-inflicted gunshot wound

Sgt. Jamie Smith of the Denver PD describes his experience responding to the mass shooting that changed the country forever.

One of the officer's most vivid memories – and one that led him to his biggest lesson learned – occurred while standing over the bodies of the killers in the library

Companies such as Lenco, LRAD, Combined Systems, Tactical Electronics, and others must now satisfy the questions and concerns of a larger constituency

The uptick came during a four-year span that saw an overall decrease in violent crime reported by schools

Minn. teen accused of planning to massacre his family and high school classmates mocked the attacks on the Boston Marathon and Sandy Hook Elementary School as "pretty lame"