DNA is cracking mysteries and cold cases. But is genome sleuthing the ‘unregulated wild west?’

It happens almost every week: Police reveal that DNA technology has helped them crack a decades-old case or identify an infamous serial killer like Jack the Ripper.
Investigators have been using criminal DNA databases for decades, but commercial genealogy sites like Ancestry.com and 23andMe have revolutionized the industry. Now people can make their own genetic material public, and when law enforcement use that information to solve crimes, it can raise serious questions about privacy.