Hello everyone. This is David Muir, co-anchor of 2020. Over the next six weeks here

we're going to bring you a special limited run series called The Interrogation Tapes produced

by ABC News Studios in partnership with 2020.

You'll hear some of the most compelling criminal cases in recent history

through recordings made in the interrogation room,

unveiling the tricks of the trade detectives use to find out what really happened.

Here's episode one with friends like these. 9-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1.

Not an emergency, actually on the Belmar bridge, there's a car that's abandoned, abandoned is off the side of the road.

Is Sarah here by chance? No. The resident is Mike Stern.

Anybody home? It wasn't home and they said we want to tell you something. You have no idea.

It's a sense of hopelessness. Sarah is my only child and you just wonder what happened to her.

Our top story this half hour,

the mystery of a missing 19-year-old from Mammoth County,

Sarah Stern was last seen late Friday night.

But searches for her attempt to turn up empty.

Now her family and authorities, a upper reward will help lead to clues.

Let's do this.

To start a day on Friday.

Okay.

The whole time do you hook up with the sir?

I went over, she had asked me to help her go through her attic.

That's when he found that safe.

...