Out front next, the breaking news, a deadly school shooting.

Police say a 14-year-old killed four people and injured nine.

The student who was sitting next to the alleged gunman just before he started shooting is with us tonight.

Plus new polls showing momentum for Harris in key states, but also a very important edge for Trump.

What is that? John King is at the

magic wall with a deep dive on all these new numbers tonight. And more breaking news, ABC,

just announcing important new details about their presidential debate, who's speaking first,

where the podiums will be, and whether those mics will be muted or not. The rules. Let's go

out front.

And good evening. I'm Erin Burnett.

Outfront tonight, the breaking news, pure evil.

Those are the words from the sheriff tonight investigating a deadly school shooting

that left two students and two teachers dead.

Nine others hospitalized,

now recovering from gunshot wounds.

The shooting, for many,

the second day of school back across this country in a school that had been back for a few weeks, taking place just about an hour outside of Atlanta. According to police, the 14-year-old

gunman is male. This is a new video from inside the school that we've just gotten. A student

who was sitting next to the alleged gunman in the classroom, he was in an algebra class,

said they were in that class together when he left the classroom. She thought to go to the

bathroom. A short time later, he tried to return to the classroom, but didn't. Here's why.

We're about to open the door until the girl who was going to open it kind of steps back and

...