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And the doctor says with Anissa, there was something different at play. Remember, it was Morgan who was diagnosed with schizophrenia. Dr. Westendorf then diagnosed Anissa with what's called a shared psychotic disorder, saying that Morgan's schizophrenia, when paired with both of their delusions about Slenderman, would create a perfect storm, luring Anissa in too.

A lot of parents will say that my 12-year-old knows the difference between right and wrong.

A lot of parents will say that my 12-year-old knows the difference between right and wrong.

So if they knew it was wrong, why do it?

So if they knew it was wrong, why do it?

Dr. Westendorf testified that because Anissa's mental disorder led to her actions that day in the woods, that she should not be held criminally responsible. Prosecutors disagreed.

Dr. Westendorf testified that because Anissa's mental disorder led to her actions that day in the woods, that she should not be held criminally responsible. Prosecutors disagreed.

The case goes to the jury. The seven men and five women deliberate for 11 hours. As they file in, we see Anissa visibly shaking.

The case goes to the jury. The seven men and five women deliberate for 11 hours. As they file in, we see Anissa visibly shaking.

But her daughter's sentencing was yet to come. And given the jury's decision in Anissa's trial, prosecutors now allow Morgan to plead guilty too. Her family awaits sentencing as well.

But her daughter's sentencing was yet to come. And given the jury's decision in Anissa's trial, prosecutors now allow Morgan to plead guilty too. Her family awaits sentencing as well.

At her plea hearing, Morgan is required to tell the judge what she did.

At her plea hearing, Morgan is required to tell the judge what she did.

When we come back, a judge's decision. How long will Morgan and Anissa be sent away for? Or will they be allowed to go home? And that remarkable little girl who crawled out of the woods determined to live, how is she doing now? More than three years after we first met her. It was just 24 hours ago, the final sentence in a case that began with a sleepover more than three years ago.

When we come back, a judge's decision. How long will Morgan and Anissa be sent away for? Or will they be allowed to go home? And that remarkable little girl who crawled out of the woods determined to live, how is she doing now? More than three years after we first met her. It was just 24 hours ago, the final sentence in a case that began with a sleepover more than three years ago.

Morgan Geiser is about to learn her fate. It was just weeks ago that Anissa's sentencing came first. The judge ordering her to a state mental facility for up to 25 years. Anissa will now be under state supervision until she is 37 years old.

Morgan Geiser is about to learn her fate. It was just weeks ago that Anissa's sentencing came first. The judge ordering her to a state mental facility for up to 25 years. Anissa will now be under state supervision until she is 37 years old.

And before Morgan's mother would learn her own daughter's fate, she shares with me a letter that her daughter has now written to Peyton.

And before Morgan's mother would learn her own daughter's fate, she shares with me a letter that her daughter has now written to Peyton.

Just yesterday, a judge deciding that Morgan will also be sent to a state mental health facility for up to 40 years. It was more than three years ago we first met Peyton, shy in front of the cameras. We did see a glimpse of her smile returning as she shared with us her love of kittens and of family. She's doing well in school. She has friends. She's social.