Two young women were brutally murdered in Napa, California on Halloween night. The killer left his DNA behind, and a groundbreaking test revealed his race and even the color of his eyes and hair. Technology was able to tell investigators what he looked like... now all they had to do was find him.

To learn more about how HLN protects listener privacy, visit cnn.com/privacy

Learn more about your ad choices. Visit podcastchoices.com/adchoices