Since Elizabeth Warren obtained some benefits in her life through claiming to be descended from Native Americans, she should submit her DNA to a company such as FamilyTreeDNA, which will tell us all her DNA profile, which can also provide very specific genetic ancestry information including race.
If she won't do it, then a direct family member could be tested, in the interests of justice.
www.familytreedna.com
If it is discovered she has no Native American heritage, she should should be sued for fraud if it can be shown she materially benefited from a false claim of minority status, since she would have denied a deserving minority a spot.
I would be willing to bet she is scared to take the test!!!