Sandy Hook Elementary School Shooting

20/20 Part 1: The gunman, the hero teacher and other details of the

The gunman of the Conn.

Troubling picture of Connecticut mass murderer slowly emerges.

He then drove to

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Brian Ross investigates

Amy Robach on how teachers hurried to save student's lives.

Chris Cuomo has the latest details from

In December 2012, 20-year-old Adam Lanza killed his mother before driving to

Extensive police report includes images of shooter Adam Lanza's room, video games.

On December 14, 2012, a shooter opened fire at

... since the tragedy in Newtown, Connecticut, when 20 students and six adults were murdered at

Half an hour after classes began at

Five years since the tragic

In this true story, we explore one of the darkest days in American history — the

Teacher rushed 15 small children into the bathroom as shots rang out.

Twenty children an six educators were gunned down in Newtown back in 2012. The mass

The father of Newtown gunman Adam Lanza said what his son did couldn't "get any more evil" and he now wishes his son had ...

It's been nearly two years since Adam Lanza opened fire on the