My latest for Real Clear Life, about unsolved murders that might be ripe for the same kind of investigation that nabbed the alleged Golden State Killer, Joseph James DeAngelo. There is some understandable controversy about using public genealogy sites to find matches to an unknown suspect’s DNA, yet it’s hard to resist the idea that this is a new route to solving previously unsolvable cases. I include the Zodiac Killer as well as JonBenet Ramsey.