Mosby's office declined to comment on the meeting.
According to a report in the Spokane Spokesman-Review, Dolezal's mother claims her daughter has mixed European heritage with "traces" of Native American ancestry. She accused her daughter of portraying herself as African-American since about 2006.
The national office of the NAACP, which is headquartered in Baltimore, issued a statement today in support of Dolezal.
"NAACP Spokane Washington Branch President Rachel Dolezal is enduring a legal issue with her family, and we respect her privacy in this matter. One's racial identity is not a qualifying criteria or disqualifying standard for NAACP leadership," the group wrote. "The NAACP Alaska-Oregon-Washington State Conference stands behind Ms. Dolezal's advocacy record."