TAPPER: Just moments ago, the suspected Golden State Killer appeared in court for the first time. Joseph James Deangelo is accused of 12 murders and dozens of rapes in California in the 1970s and 1980s, but the story of how police cracked this 30-year-old cold case is our "TECH LEAD" today. Police said they found him using information from one of the genealogy Web sites that will tell you about your ancestry or help you find a long-lost relative. When police couldn't find matches to the DNA they found at the scenes of the Golden State Killer's crimes, they compared the genetic profile to those online and identified potential relatives. That finally led police to the alleged serial killer. And before anyone at the White House is fired again, this is Friday of course, I want to take a quick second for another shameless plug, that my brand- new novel is out called The Hellfire Club. It's a political thriller. It takes place right in the thick of the Cold War Era in 1950s. It's full of familiar real-life characters and of course a new fictional ones, maybe a cautionary tale for today. It's about the swamp, it's about McCarthy and it's about a conspiracy. Again, the novel is called The Hellfire Club. It's available on Amazon or at your local bookstore and I'd be honored if you would check it out. Be sure to tune in to CNN's "STATE OF THE UNION" this Sunday morning. My guest with be Oklahoma Senator James Langford who is on the Senate Intelligence Committee, also with us Ohio Governor John Kasich, it all
Police Use DNA Genealogy Site To Catch "Golden State Killer.