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.

March 29, 2013 -- Updated 1353 GMT (2153 HKT)

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.

January 15, 2013 -- Updated 1626 GMT (0026 HKT)

His parents remember Dylan Hockley as such a happy child.

February 19, 2013 -- Updated 2349 GMT (0749 HKT)

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

December 19, 2012 -- Updated 1517 GMT (2317 HKT)

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

December 20, 2012 -- Updated 1502 GMT (2302 HKT)

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

December 20, 2012 -- Updated 1440 GMT (2240 HKT)

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

December 18, 2012 -- Updated 1530 GMT (2330 HKT)

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.