Several parties have a stake in what happens to this girl: Her biological mother and father, the adoptive parents, the federal government, the Oklahoma-based tribe, and a legal guardian appointed by the state to represent the child's interests.

CNN: Supreme Court tackles Native American adoption dispute

And she's a force to be reckoned with by her younger brother and her father at home, where she tries to avenge what she believes was her father's violence against her late mother, a suicide when Diana was a little girl.

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