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Welcome to postmortem. I'm 48 hours correspondent Natalie Morales filling in today for Anne-Marie Green.

And today we are discussing the case of Gary Herbst, who was reported missing by his wife in 2014. Three years later, a dog discovered his skull in rural Wisconsin with a gunshot wound in the back of the head. Joining me today to discuss his fascinating report is 48-hour correspondent, Peter Van Zant. Thanks for joining us, Peter. Hey, Natalie. How are you?

I'm good. Thank you. And this one really was riveting. Absolutely. And the notion that this man in rural

Wisconsin, he goes out, sees his dog nine on something in the driveway, comes up and checks it out,

and sees a human skull, and calls police. It was just incredible. Now, Peter, this

hour also features your exclusive interview with a convicted killer. And this is one of the

most revealing conversations about a murder that I've heard here on 48 hours. Yeah. Over the years,

I was trying to add it up. I've talked to about 19 accused killers.

None of them has ever admitted it.

We've had very confrontational interviews and things and gotten very close to getting them to admit.

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