At times, a perpetrator's DNA is the only clue at a murder scene.

But what happens when you don't have a suspect to compare it to?

This case made forensic history when scientists saw in these genes, literally, the killer's

physical description.

In the 1600s, Baton Rouge and Louisiana got its name from French settlers.

It means red stick and referred to the pole marking the hunting area of local Indian tribes.

To this day, Baton Rouge is one of the most racially diverse cities in the country.

Pam Kinnamore knew the town's history well by birth and by profession.

Pam operated an antique store.

Pam loved life.

Every day, she couldn't wait to do all the things that she wanted to do.

She was fun. She was exuberant. She was enthused. She was intelligent.

Shortly before midnight on a Friday in July 2002, Pam's husband Byron called police to

report his wife missing.

He said when he got home, the front door was wide open. His wife's keys were there.

But Pam was gone. Strangely, the bathtub was full of water.

It looked like she had been taking a bath. And also there was some blood on a rug under

the bed and the bedroom that hadn't been there before.

Forensic testing revealed the blood on the carpet was Pam's. It appeared that she left her

keys in the door inadvertently and an intruder walked in while Pam was in the bathtub.

The couple's son was sleeping overnight at a friend's house and couldn't shed any light on what

had happened. Investigators also had to consider whether Pam had simply run off,

...