The plot continues to thicken.

Wednesday morning, Rachel Dolezal’s adopted brother, Ezra, spoke with CNN to dispute his sister’s claims that “no biological proof” exists to prove Larry and Ruthanne Dolezal are her biological parents.

“I think she’s nervous to just admit that she’s not been telling the truth,” Ezra said in an interview on CNN’s New Day. “Which is why she keeps on making up more and more lies to help fit the story as it goes,” he adds.

Watch Rachel Dolezal’s brother Ezra’s CNN interview below:

Ezra and his parents maintain Rachel has misled her community into believing she was black when she was in fact born and raised as a white woman.

Rachel has continually disputed these allegations and maintains that she is black. 

Ezra, however, doubts she will ever be able to prove it.

“I guarantee that she is not going to take a DNA test to prove that [they] are not her parents, because they are, and she doesn’t want to be caught going back on her story,” he said.”She has an integrity issue.”