The woman who resigned as president of the Spokane NAACP after her parents revealed she was white posing as black says there's no proof they are her mother and father.

In an interview with NBC News on Tuesday night (http://nbcnews.to/1LfaDYU ), Rachel Dolezal said she hasn't had a DNA test and there's no "biological proof" that Larry and Ruthanne Dolezal are her parents.

NBC's Savannah Guthrie pointed out there's a birth certificate that lists the Dolezals as her parents.

Rachel Dolezal responded that she can't prove her parentage one way or another.

The uproar over her racial identity began last week after her parents said their daughter was white. For years, she publicly described herself as black or partly black and said on NBC's "Today" show that she identifies as black.