The following episode contains intensely disturbing accounts of violence.

Listener discretion is advised.

I just said, Ray, do you know why you're here?

I took out the DNA report.

And I showed him the DNA report.

And I said, Ray, we're talking about a quadrillion, 18 zeros after the number that says you.

So now his mind is racing because he also knows what's coming next.

And it didn't even have to be said, but it was going to be said. Ray, the death penalty's coming.

This was the 202nd homicide in the city that year, so we're kind of familiar with getting a lot of work in this area.

It's the summer of 1989, and on June 25th, Philadelphia homicide detective Jim Corbett

heads out on the latest call, a body floating in Cobbs Creek.

Now here's the trail. We'll take this trail down to where the body was discovered.

You didn't see the victim until you got right in this area here, right close to the shore.

She was in the water, face down.

I thought the worst.

Her shirt was missing.

Her brow was off and the brawoped around her neck.

I assumed then that she had been raped and murdered.

At autopsy, the coroner confirms Corbett's fears.

A rape kit is taken and semen identified.

The time of death is estimated to have been between 3 and 7 a.m.

Identifying the victim doesn't take long as word of the crime spreads and a young man named Stephen McNamee approaches the scene and I just asked I said listen I said last I am my girlfriend

...