When 27-year-old Democratic National Committee (DNC) staffer Seth Rich was shot dead in Washington, D.C., on July 8, 2016, the news had just broken that WikiLeaks was publishing a trove of embarrassing and damning DNC e-mails. And while the official story is that the leaked e-mails had nothing to do with Rich’s murder, that story falls apart under scrutiny.That official story is that Rich was killed during a robbery in an area of the city with escalating levels of crime, including armed robbery. But when Rich — who was shot twice in the back at close range — was found,...