What happens when John Doe becomes the suspect in a murder? ;) EDIT: In all seriousness, as this technology becomes cheaper and more advanced/insightful, I can

What happens when John Doe becomes the suspect in a murder? ;) EDIT: In all seriousness, as this technology becomes cheaper and more advanced/insightful, I can imagine a future where these tests are required by the government in the name of cost efficiency. Then it will become a matter of trusting the government to guard and use our information responsibly...