Right now in Tennessee, there's a notorious killer sitting on death row.

I've never been in the presence of anyone I thought was pure evil, but to me she's pure evil.

This killer lured a young girl into the woods and subjected her to nearly an hour of horrific torture.

Beat her, kicked her, smashed her face into the ground.

They toyed with her. They played cat and mouse with her. They would let her get up. She would

beg for her life. At one point, they said that she told them, just let me go. I'll not say anything.

And they said, you know, we can't do that. Here is a young woman who must have gone through

absolute hell. And I can't imagine anybody going through that. And I can't imagine enduring that

as she did for that long. This killer used a blade to stab this young girl over 300 times before participating in this young girl having a

satanic symbol carved into her skin while she was still alive before finally killing her by using a large

chunk of asphalt to crush her face and then her killer took a piece of her skull

as a souvenir. An autopsy confirmed she was slashed repeatedly with a meat cleaver and some other

small cutting device, perhaps a razor blade or box opener. Authorities say she was then beaten over the head with a large chunk of asphalt from this pile.

When you imagine this killer, you might be thinking of the most depraved, sadistic serial killers in history.

Ted Bundy, Jeffrey Dahmer.

You would probably never believe that the crime I just described was

committed by a teenage girl. This is the murder of Colleen Slummer and her killer, Krista Pike,

the youngest girl in America to ever be sentenced to death.

And my name is Brianna, and I'm hot on the case.

Krista Pike had a very terrible, traumatic, abusive life,

and the turmoil really began before she was

ever even born. Krista was born on March 10th, 1976 in Beckley, West Virginia, to her parents,

...