Sooner or Later Your Cousin’s DNA Is Going to Solve a Murder

In the year since the arrest of the man believed to be the notorious Golden State Killer, the world of criminal investigation has been radically transformed.
Using an unconventional technique that relies on DNA submitted to online genealogy sites, investigators have solved dozens of violent crimes, in many cases decades after they hit dead ends. Experts believe the technique could be used to revive investigations into a vast number of cases that have gone cold across the country, including at least 100,000 unsolved major violent crimes and 40,000 unidentified bodies.