Columbine, Colorado
An exploration of the 1999 attack at a high school in Littleton, Colorado and the myths that may have inspired the active shooter phenomenon. Documentary series finale.
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More from this season

S1 E1
Aurora, Colorado
Survivors and first responders recount the 2012 movie theater shooting in Aurora, Colorado. A grieving family challenges the media.

S1 E2
San Bernardino, California
The 2015 shooting in San Bernardino, California brings out a massive response from law enforcement. A shocked community responds to homegrown terrorism.

S1 E3
Charleston, South Carolina
The city of Charleston, South Carolina is ripped apart by a shooting at a historic church. In the aftermath, the community is divided by the idea of forgiveness.

S1 E4
Washington, D.C.
Stories of loss and heroism during the 2013 shooting at the Washington Navy Yard. The shooter's sister recounts her brother's descent into violence.