Up next, a human skeleton is found in the marshlands of North Carolina.

The longer a body's been dead, the harder it is to determine how long it's been dead.

We don't know who she is, we don't know why she was killed.

But it tells a story all its own.

Whatever happened to pre-seed death, it probably was sexual.

A story of anger and hatred.

At what point does a person realize that they're dying?

And a violent ant.

Had this person remained anonymous, we would have had nowhere to go.

On a cold spring afternoon in 2004, Rayleigh Jacobs found what looked like human bones

in the backyard of the home he rented in Wilmington, North Carolina.

It was kind of gruesome. We came across these bones.

First we seen our leg bones and then we came across our skull, you know, in ribs.

And then we realized it wasn't fake, it was real.

It was terrible.

He called authorities who move quickly to collect the remains and any possible forensic evidence.

The bones that had been scattered by the animals and maybe by the tide coming in because that was a marshland.

It was a dump site and there was a lot of garbage back there.

Anthropologist Dr. Medori Albert and her team of student volunteers

recovered about 160 bones or 80% of the skeleton.

The victim was a Caucasian female about 30 years old and from the length of her femur, about 5'4", tall.

The amount of decomposition indicated she'd been dead for approximately 18 months.

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