My understanding is that she was raised in a non-indingenous household in a non-indingenous community from birth through high school and was claiming Indigenous heritage before she was ever adopted into the community of which is now a member.

To me, her marriage certificate says it all. It is a clear and direct refutation of her public claims to ignorance or confusion. Not because she was telling a different story for a different purpose, but because she was acknowledging the reality of her upbringing.

I'm reluctant to suggest that DNA testing is required. Many of the indigenous peoples of at least North America have a long and well documented practice of adopting even adults and former enemies into their families and communities as full fledged members with all the associated privileges, rights, and responsibilities.