On The Curious Case of Natalia Grace: Natalia Speaks, a DNA test conducted by a medical lab concluded Natalia was around 22 years old as of August 2023, indicating that she would've been approximately 9 years old when she moved in with the Barnetts. 

"This one little piece of paper throws every single lie that the Barnetts has said right into the trash with a match," Natalia said after receiving the lab results. "They ignored everything that was pointing to the truth just so they could create this stupid lie."

When she confronted her estranged father, Michael offered a tearful apology, which Natalia accepted.

"I forgive you," she told him, prompting Michael to tell her, "You don't have to."

He added, "I don't forgive me."

For her part, Kristine has denied allegations of mistreatment and abandonment brought up in the docuseries.

"She was not abused by anyone in my family," Kristine wrote, in part, on Facebook Jan. 3. "Any discipline of Natalia was very minimal and was not out of the bounds of normal parenting. If anything it was overly permissive as we all felt a tremendous amount of sympathy for Natalia and loved her while she lived with us."