<p>In this Aug. 17, 2014, photo, people protest for Michael Brown, who was killed by a police officer in Ferguson, Mo. Details may differ, circumstances of their deaths may remain unknown, but the outrage that erupted after the Aug. 9 fatal shooting of the unarmed, black 18-year-old by a white officer in Ferguson, Missouri, has become a rallying cry in protests over police killings across the nation. In this Aug. 17, 2014, photo, people protest for Michael Brown, who w…

September 2, 2014