Timeline: School violence in the U.S.

Details continue to emerge about what precisely happened at Sandy Hook Elementary School. Here is a timeline of events that compiles the latest reporting.

An interactive tribute to the victims of the Sandy Hook Elementary School shooting.

updated 9:53 AM EDT, Fri March 29, 2013

Police released new documents related to the shootings last year at Sandy Hook Elementary School in Connecticut, but a motive for the attack by the troubled young man remained elusive.

updated 11:26 AM EST, Tue January 15, 2013

His parents remember Dylan Hockley as such a happy child.

updated 6:49 PM EST, Tue February 19, 2013

Investigators have found evidence that Sandy Hook Elementary School gunman Adam Lanza "was obsessed" with other mass murderers.

updated 10:17 AM EST, Wed December 19, 2012

Amid the chaos that first-responder Ray Corbo witnessed on Friday, there is one image that he will never forget.

updated 10:02 AM EST, Thu December 20, 2012

In many ways, Josh Stepakoff's childhood came to an abrupt halt at 10:49 a.m. on August 10, 1999.

updated 9:40 AM EST, Thu December 20, 2012

When Lauren Rousseau's boyfriend wakes up, he can smell her perfume.

updated 10:30 AM EST, Tue December 18, 2012

Placing yourself in the path of flying bullets to protect innocents. It's a job description fitting for a soldier or police officer, but not for a school teacher.