Two young women were brutally murdered on Halloween,

but the killer left behind his DNA and a groundbreaking new test

identified his eye color, his hair, and even the color of his skin.

But knowing what he looked like was one thing, finding him was another.

It was close to midnight on Halloween in Mapper, California.

Trick or treat had been over for hours, and 26-year-old Lauren Meansow went to bed around 11 p.m.

A dog cloy, slept in her room.

At two in the morning, the dog started to growl.

And Lauren heard noises. At first, she thought one of her roommates came home with a boyfriend.

But then she heard a fight and streams.

When she looked out, she saw a man run down the stairs and jump out of an open front window.

But she didn't see his face.

When she went upstairs, Lauren found her two roommates, both had been stabbed repeatedly.

I don't know, I don't know if I've ever been to a downstairs, I think the dog.

When police arrived, they found 26-year-old Adrian Insania and 25-year-old Leslie Mazzara dead.

It was a very, very bloody crime scene. It's the most bloody crime scene I've seen in my career.

Leslie Mazzara was a former beauty queen who worked in the sales department of a local winery.

The Indian Good evening, the senior at the University of Georgia, I am Leslie and Mazzara Mazzara.

Adrian Insania was a civil engineer.

It was horrible. There aren't any words to describe that.

It's almost as if you just go completely cold.

Blood stains in the house provided investigators with critical information.

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