On the afternoon of Aug. 9, a police officer fatally shot an unarmed, black teenager, Michael Brown, in Ferguson, Missouri. Details remain in dispute. Eyewitnesses have said that Brown was compliant with police and was shot while he had his hands up. Police maintain that the 18-year-old had assaulted an officer and was reaching for the officer’s gun. One thing clear, however, is that Brown’s death follows a disturbingly common trend of black men being killed, often while unarmed and at the hands of police officers, security guards and vigilantes.