Once upon a time, it wasn't a crime to rape a black woman.
"The movement to end sexual violence in the lives of Black women in the U.S. is inextricably connected to the Civil Rights movement. We cannot effectively discuss the issue of sexual assault in Black communities without acknowledging the direct war that was waged against Black women through rape during slavery and the Jim Crow era."

"The Department of Justice estimates that for every white woman that reports her rape, at least 5 white women do not report theirs; and yet, for every African-American woman that reports her rape, at least 15 African-American women do not report theirs."

http://www.forbes.com/sites/shenegot...of-resistance/