by Olivia HAMPTON WASHINGTON, United States (AFP) — A black gunman shot dead three police officers in the Louisiana capital of Baton Rouge on Sunday, in the latest spate of violence involving law enforcement. The shooting, which also wounded three other officers, took place in a city scarred by high racial tensions and numerous protests against police brutality since the death July 5 of Alton Sterling, a black man shot at point-blank range by police. […]