Nifong didn't lose her. She never claimed she and Precious were pulled apart, not in any of her stories she told on TV, not in her police statement. You can't lose what you don't have.
Her stories she told to the media changed from her police report, but in none of those stories she ever claimed she and Precious were pulled apart, or that she showed up in the bathroom and helped Precious dress.
OK, but are you suggesting she may still give evidence that helps Nifong? If so, what might that be?
The point is that Precious made these statements and Kim is denying the truth of Precious's statements.