The second girl in a pair of Wisconsin teenagers who stabbed their classmate 19 times is set to plead guilty by reason of mental illness on Thursday.
Morgan Geyser, 15, was one of two girls who claimed they were influenced by a fictional horror story about a character named Slenderman which made them try to kill Payton Leutner, 12 at the time, in 2014, according to PEOPLE.
Geyser and her accomplice, Anissa Weier, lured Leutner into the woods, then stabbed her over and over again. The two girls left Leutner there to die, but the 12-year-old crawled to a bike path where she was found by a passerby who immediately called 911.
Weier, now 15, pleaded guilty to attempted “second-degree homicide as a party to a crime with use of a deadly weapon” as part of a plea deal. She was initially charged as an adult with first-degree intentional homicide. A jury determined that the 15-year-old is mentally ill and not criminally responsible for her actions. She will spend the next three years in a mental hospital as part of the plea deal.
The Leutner family is reportedly unhappy with the jury’s decision.
In a statement to PEOPLE, the family said, “The potential release of an assailant that methodically planned and executed an attack in which our little girl was stabbed 19 times puts the community and our family at risk. It is deeply disappointing.”
Geyser will enter a plea of guilty by reason of mental illness to first-degree attempted homicide. She was set to stand trial next month, but there will be no trial after she enters her plea Thursday.
Donna Kuchler, Geyser’s attorney, said Friday that the 15-year-old will be evaluated and placed somewhere.
“After the plea is entered, there will be an evaluation done on Morgan to determine where she will be placed and whether she still needs institutional care or something else. It has been a tragic experience for everyone. Our hearts go out to the victim and her family.”
[Feature Photo: Waukesha Police Department]