Is Michael Brown a martyr?

Michael Brown is dead. Eighteen years old, a young man gunned down - not just shot - by police in his neighborhood in Ferguson, Missouri. Brown's experience earns international attention not because he is dead, but because of sustained outrage, first by his grieving family, then over video available from bystanders, then by people in his community denied answers, then by shocked citizens around the county. Extrajudicial killing of Black Americans, especially our young men, is common today. Many pass unnoticed. So, why the attention to this murder?