December 16, 2012 7:58 PM

60 Minutes reports: Tragedy in Newtown

Sally Cox: Four or five years.

The gunman had shot out a window to get past the locked door. From the start, Sally Cox told us, the teachers and the kids, went immediately into the lockdown that they had practiced and practiced.

Scott Pelley: Children were trained to go under their desks in events like these?

Sally Cox: Yeah, yeah, yeah. And we have different kinds of drills, you know? I mean-- in addition to fire drills and high wind drills and lock down drills and evacuation drills. So we've-- we've done it. We've been doing it, you know, each month it's something different, you know?

Scott Pelley: So you'd done those kind of things fairly recently?

Sally Cox: Just recently, yep. Yes. Yeah.

Scott Pelley: At some point, you left the school. And I wonder in that journey from your office through the door, what did you see?

Sally Cox: They told me to close my eyes. They-- they got-- they took my arm. And they guided me out. They said, "We'll guide you out. We want you to close your eyes until we get to the parking lot." I don't know what was there that they didn't want me to see, but they told me to close my eyes.

Scott Pelley: And that's what you did.

Sally Cox: That's what I did. Yeah.

The officers spared her the sight of the bodies of 20 first graders, four teachers, the school psychologist, the principal, and the killer.

Twenty-year-old Adam Lanza lived in town nearly all his life but he left few impressions. Olivia Devivo sat behind Lanza in 10th grade honors English.

Olivia Devivo: Yeah. He carried a briefcase, briefcase to every class. And that stood out to me because in high school everyone has backpacks and you know messenger bags. And that stood out to a lot of kids.

It also stood out that Lanza was uncomfortable when asked to speak in class.

Olivia Devivo: He just would just get very nervous. And you know, his face would turn bright red and he would get very fidgety. And you could just tell that it wasn't that he didn't know the answer. It's just that it was very difficult for him to say what he wanted to say.

Scott Pelley: Did he have a reputation for being a smart kid?

Olivia Devivo: Yeah, definitely. I mean you can just tell by the way he was in class. He was always-- appeared to be very attentive and focused.

Scott Pelley: How would you describe him socially?

Olivia Devivo: He must have really felt uncomfortable in any kind of social situation because he never really put himself out there. And I just don't really remember him ever, you know, stepping forward or really saying anything. It was just he wanted to be left alone and we left him alone.



© 2012 CBS Interactive Inc. All Rights Reserved.
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