FERGUSON, UNITED STATES - AUGUST 21:  Captain Ronald Johnson (2th L) reacts during a peaceful demonstration over the killing of unarmed teen Michael Brown in the Saint Louis suburb of Ferguson, Missouri, on August 21, 2014. Eighteen-year-old unarmed teen Michael Brown was shot dead by police in the St. Louis suburb of Ferguson, Missouri on August 09, 2014. (Photo by Basri Sahin/Anadolu Agency/Getty Images)