For Shawna Green and many other residents of Palmdale, a city in California’s Mojave Desert, there is no question that Robert Fuller’s death was racially motivated. “In a word, this is a cover-up,” said Green, 46, commenting about the 24-year-old black man who was found dead hanging from a tree on June 10. Authorities initially labeled Fuller’s death a suicide, but then backtracked following an outcry from his family and civic leaders who demanded a full investigation and have sought an independent probe and autopsy.