On August 14, 2014, five days after the fatal shooting of Michael Brown ignited race riots throughout the city of Ferguson, Missouri, the nation found an unlikely hero in Captain Ron Johnson of the Missouri Highway Patrol. Charged with the Herculean task of restoring peace between a hostile African American community and the local police, Johnson, a 30-year law enforcement veteran and an African American, did the unthinkable: He took off his bulletproof...