Lisa Gaudenzi disappeared from a store where she felt like someone had been watching her. Investigation revealed that it was someone Lisa didn't know.
Police investigate the disappearance of Lisa and begin to focus on a suspect after finding a missing apartment key. They test DNA from every male subject and finally have a breakthrough when an individual's DNA matches the evidence from the crime scene.
Parabon uses DNA analysis to produce a composite sketch of a suspect. The transformation of DNA information into a visual representation of a suspect is similar to how a sketch artist uses eyewitness accounts to create an image.