He wanted to find some piece of evidence, you know, a murder weapon, a print that somehow tied Larry Vanner to the active murdering in Sinjin.

What they came up with was cat litter.

There was a huge pile of kitty litter on top of Vincent's body.

10 bags worth a kitty litter.

If we can find out where he bought all this cat litter, there might be a store employee who actually remembers it.

It would be like a needle in a haystack to try to locate the store where he bought the cat.

Litter is just so many pet stores would be nearly impossible.

And so Roxanne sort of takes on that challenge and spots a detail.

I had been notified by the bank that there was some video of him at a T M.

Using unsuited credit card.

I remembered that where that bank was that little in that little shopping center.

There was this really cool pet store, and based on nothing more than that, she takes a ride out to the pet store.

I walked in and I said Things happen.

Maybe that somebody came in and bought a significant quantity of cat litter out of the blue.

And he goes, Yeah, there was this guy that came in and he bought 10 of them and they described him to a teeth older guy.

Gray hair, mustache, beard, scruffy beard, bright blue eyes, you know, and he goes in.

He paid cash.

Ultimately, the cat litter was the key.

The pretrial hearings for Larry's murder trial begin, and he pleads guilty.

He doesn't fight it at all.

He just says, I'm done.

Send me to jail.

I don't want to talk about anything anymore.

It was a huge shock to everyone in the judge, the prosecutor banners own lawyer Roxanne has a hunch that Larry Vanner is hiding something.

That he had.

This little girl that he said was his daughter and he gave her away.

Like what?

What was this charge of abandoning a child about?

I think he believed if he pled guilty, I would stop investigating that aspect of his past.

He goes to jail thinking it's done, but the case haunts Roxanne and she keeps digging, keeps digging.

I was really centered on the little girl on Lisa.

There were, like little fingerprint cards, like with these little tiny little hands and little.

They were dead there for little footprints on the back of him and little tiny fingerprints.

And it just made me angry and curious like, Was this really his daughter?

If it's not his daughter, where did he get her?

Who did he get her from?

I put in a request to do a definitive paternity test.

She got a blood sample from Vanner, who is now in prison, and she tested it against the sample they took from five or ELISA.

He was not biologically related to Lisa.

Larry Banner is not Lisa's father.

Curtis Kimble was not Lisa's father.

Gordon Jensen Gerald Ma Qimin.

There wasn't her father.

Maybe Lisa's not Lisa.

Once Roxanne's saw the results of the paternity test, she called the San Bernardino Sheriff's Office.

They had handled Lisa's case 17 years ago, and she was about to drop shocking news on here.

I am years, years later, showing up on going, Hey, you have ah found Jane Doe.

I believe initially they were like we don't have a case like that, and I'm like, Yeah, you D'oh!

Roxanne basically tells them you have a missing person on unidentified victim who was alive, who still has a family out there to meet.

It just made me determined to do everything that I could possibly do to try to find out who she waas.

In 2003 when the San Bernardino Sheriff's Department opened a new investigation aimed at finding her true identity, Lisa was 22 years old.

I called Lisa and talked to her.

She really wanted to know who she waas.

By this time, Lise is an adult.

She had grown up.

So this rocks her world even more.

Lisa learns that her father is not her father.

She still has no idea where her mother is.

She didn't even know what her given birth name may have been with the realization that he was not Lisa's father.

Way started investigating who she waas where he took her from me.

So then the mystery becomes whose daughter is she and and who is her mother?

And where is her mother?

Because we know this guy kills people.

We might be dealing not just with someone that killed one person, but we're dealing with a serial killer.

That was the genesis of the investigation that would ultimately lead back New Hampshire into their break.

State Park police have still not identified the bodies of one woman and three young girls found in 1985 and 2000 in metal drums.

In my Judeo Christian heritage, there's the sentiment around murder that the blood of the innocent will call out from the ground to God.

And it's going to find justice because its DNA is going to point at perfect traitors on How amazing is it that it was blood of the innocents?

It was blood of little Lisa would go on to solve this mystery.

Hi, everyone.

George Stephanopoulos here.

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