Connecticut Police Respond to Deadly Elementary School Shooting

Lt. Paul Vance speaks with ABC News on the aftermath of the school shooting in Newtown, Conn.
2:18 | 12/15/12

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Transcript for Connecticut Police Respond to Deadly Elementary School Shooting
I'm here with lieutenant paul vance of state police here in connecticut. Keeping people informed all through the day yesterday. We learned overnight that you were able to notify all of the families. Our detectives made it a priority to, in fact, identify all of the deceased victims, the children, and the adults, within the facility. And what more have you been able to learn about adam lanza? Why and how he did this? This is something that's going to take a significant amount of time. We have teams peeling the onion back, so to speak. We have many, many questions we need to ask and we need to explore. Three guns found on-site. We haven't discussed that as of yet. In excess of three guns. More than three guns. We know also that the guns match guns that his mother may have had. Have you been able to put that together yet? I don't have that information specifically. Do you know if they were obtained legally. That is something we would also explore in the investigation. How about how adam lanza got into the school. There were some reports that the principal may have buzzed him in. I think that's significantly premature. We do have a pretty good idea how entrance was obtained. We have an adult witness that was wounded that survived, who will be invaluable to us. Why this school? We do have some background information, that there was a connection to the school. The specific connection, I'd rather not divulge and get into right now. There's a lot of discussion out there. His mom may have been a teacher there at some point? For our purposes, it's better we explore that confidently for a little while longer. I know you've spoken both to his brother and his father overnight. What were you able to learn from them? We've been working with law enforcement agencies from other states, who are working with us on this case, to assist us. And they have extracted and obtained information that was critical to our investigation. Any indication that he had threatened to kill before? There is no indication that surfaced immediately. There's none whatsoever. Are you confident that he actact ed absolutely alone? Yeah. Lieutenant vance, thank you

This transcript has been automatically generated and may not be 100% accurate.

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