'We Were Trying To Kill Her': Girl, 12, Admits After Brutally Stabbing Classmate

Hearing the attempted murderer's words, Morgan Geyser's heartbroken mother told her interviewers, in the clip, that it was simply "not her daughter." She added that it scared her to realize that Geyser appeared to have "no remorse for what's happened and she just talks about it in such a flat manner."

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Explaining their crime to the police, the underage girl said they were simply trying to please the fictional internet horror character "Slenderman" by killing Leutner as tribute. They were also trying to protect themselves and their families from him.

After being questioned by police, both underage girls pleaded guilty to their roles in the nearly-fatal attack.

Following the stabbing, a judge found Weier not criminally responsible, since she was reportedly mentally ill at the time. She was sent to a psychiatric institution and instructed to remain there for 25 years.

While Morgan Geyser's family claimed she too, was mentally ill and diagnosed with schizophrenia, the young schoolgirl was found criminally responsible for her attempted killing and is expected to receive her final sentencing later this week. According to the publication, prosecutors are seeking 40 years for the young attempted murderer.

Payton Leutner's mother said that while she is not happy with the outcome of the case and treatment of the underage criminals, she has accepted that the law is not fair.

Anissa Weier's mother then told PEOPLE that the families and authorities may never know the real reason for the brutal 2014 stabbing. "The only person that knows why they did this is 12-year-old Anissa and 12-year-old Morgan," she said. "Those children, basically, don't exist anymore."