Deborah Roberts

You may think you've heard this story, but tonight we'll take you inside the investigation.

We'll show you body camera video from the officer who first responded to the scene, and then the frantic moments that one of the surviving roommates recounts a man in a mask inside the house.

As soon as you get there, you know something's wrong.

And then what happened next?

I think I walked just right in the door and Hunter already was like, everybody get out.

And then he was like, somebody call 911.

And you'll hear from investigators who launched a nationwide manhunt to unmask and arrest the killer, who was found thousands of miles away from the crime scene.

You interviewed Brian Koberger.

Yes.

He would try to go and ask, well, why are you guys really here?

And we said, well, I feel like you probably know why we're here.

But this all began in 2022.

It was the start of a new school year, a time of anticipation, hope, promise.

Coming back to school at the University of Idaho really starts in the middle of August.

You're packing up your car, it's filled to the brim.

You can fit your entire life into a couple of boxes in the back of a sedan.

What a time.

Everyone's really excited, the new people, the new classes, things we can do, people to meet.

You know, you raise your kids and you're, you know, you just wonder, you know, at what point are they gonna kind of feel like they're independent enough to kind of fly the, out of the nest, I guess, if you will.

Among the students arriving here are 21-year-old seniors Kaylee Gonsalves and Madison Mogan, along with Zanna Cronodal, a 20-year-old junior, and 19-year-old sophomore Ethan Chapin.