I'm Lester Holt, tonight on Date Line.

9-1-1 calls started coming in.

They said they heard screams coming from the park.

She was found naked and bound with red duct tape.

When you see the photos, you can fill the terror.

He left her for dead.

We were pretty shocked as a DNA laboratory

that there were no other offenders that this case had matched to.

How is this guy not in the system?

Then one day, you got a call.

She said there's been an update in your duct tape case.

It was like, finally.

I'd been thinking about who this guy was for so long.

I don't think anything could have prepared me for that answer.

How do you wrap your mind around the fact that somebody you trusted did this?

I can just picture him smirking kind of a second victimization.

Yeah, a huge, just mind-shrug.

What kind of person does that sort of thing?

Exceptionalistic.

Evil.

Here's Keith Morrison with Left For Dead.

The evening air was warm and thick with anticipation.

...