Christopher Tapp

Jeff Pratt was a veteran cop by then.

It was the most horrific scene that I had ever worked up in, you know, in that 15 years of my career at that point.

What had been done to that young woman?

Well, she was nearly decapitated.

Oh, man.

What else do you remember finding on, around her?

Near the bed was a stuffed teddy bear, soaked in blood.

On the dead girl's stomach was a bloody handprint.

Could you get a print off that, a usable print?

We tried, and in that time, we were not capable of doing that.

But the killer had left critical, verifiable DNA evidence on the victim's body.

A lot of biological materials that had been left behind, indicating there had been a sexual assault.

At the time, DNA was quite new.

It was.

And that's why we were focused so hard on collecting all of those biologicals.

This moment, this place, would imprint itself on the detectives for life.

Perangi's family called down to the police department.

It was beyond imagining.

So they brought in some pictures.

Is this your sister?