Anissa Weier, one of the girls who said they attacked a friend to please the fictional character Slender Man, is asking for conditional release.

Anissa Weier, one of two girls who said they attacked a friend to please the fictional character "Slender Man," will be released from her mental health facility.

In 2017 Anissa Weier was sentenced to up to 25 years in a mental institution for first-degree attempted intentional homicide.

Caden Leutner was just 10 and in the fourth grade when his sister, Payton Leutner, was stabbed by two friends trying to appease a fictional character named "Slender Man."

Payton Leutner, “Slender Man” stabbing survivor, speaking out five years after the attack.

When she was 12, two friends lured her into the woods and stabbed her 19 times; she shared with David Muir a lesson she’d learned about friends.

Waukesha Detective Shelly Fisher interviewed Payton Leutner at the hospital a week after her friends attacked her in the woods with a knife.

Anissa Weier and Morgan Geyser's moms say their daughters were "typical girls."

Payton Leutner was stabbed 19 times in 2014, and her mother offers her support to other parents dealing with horrific tragedy.

Angie Geyser and Kristi Weier told ABC News they saw no warning signs of violence before their daughters stabbed a classmate.

Morgan Geyser pleaded guilty to attempted first-degree intentional homicide.

Dr. Eric Newsom explains how this terrifying Internet-based character from fan fiction grew a massive cult-like following.

Morgan and Anissa were 12 years old at the time of the alleged crime.

Bill and Kristi Weier discuss what happened with their daughter Anissa during her interrogation and explain what it has been like since she first was taken into custody in 2014.

Children as young as 10 can be tried as adults in Wisconsin.

Morgan Geyser, 14, will plead not guilty by reason of mental disease or defect.

Mother of one of the accused girls in the "Slender Man" case, two 12-year-olds accused of stabbing a friend 19 times to please a fictional character, speaks out.