Brent Christensen

The video footage from that camera dramatically changed the scope of the investigation, because now we didn't just have a missing persons case.

Now we had a suspect vehicle.

Once she got in the car, we realized, OK, we're dealing with the kidnapping here.

Through that video, we were trying to figure out, OK, what kind of car is this?

You could not see from the distance.

It got too pixelated as she came in close.

She could not get a view of the driver, could not get a view of the license plate.

And so the FBI got involved.

That vehicle is a very unique vehicle.

It was identified as a Saturn Astra, which was only produced for a very short time frame and imported into the United States.

It's a Saturn Astra, which is a very rare vehicle.

If it was a Honda Accord, Toyota Camry.

In Champaign County, I would imagine there's probably thousands of common vehicles.

This car, I believe there was only 58 in the state.

There was nothing more important than determining who owned the car, whether they could make any identification of the driver, and then go talk to that person.

Campus police say surveillance video shows her entering a black Saturn Astra vehicle

The fact that the police were releasing the video gave it a renewed sense of this is a serious situation.

The posters of Yang Yang and the car were hung up all around campus.

I think students on campus were very concerned.

How much fear was there amongst the other students here when this started to unfold?