According to a CNN report, Rachel Dolezal's adopted brother told him "not to blow her cover" -- and he says what she has done is essentially living in "blackface."
It was 2011 when he noticed "physical changes"
"There was the gradual darkening of the skin and the hair. She started molding herself into who she is today."
He considers her behavior a slap in the face to African-Americans:
"She doesn't know what it's like to be black. She's only been African-American when it benefited her. She hasn't been through all the struggles. She's only been African-American the last few years."
He does admire the NAACP work she has done:
"Rachel has done really good work fighting against racism and police brutality ... but she went about it the wrong way."
He believes her thinking changed while a student at Howard University:
"When she applied they thought she was a black student. When she came there, they saw she was white and she wasn't treated that well, especially people that worked there. She probably started developing this kind of dislike for being white and dislike for white people. She used to tell Izaiah ... that all white people are racists. She might have developed some self-hatred."