A jury determined Anissa Weier was mentally ill when she and Morgan Geyser lured Payton Leutner into woods in Milwaukee, United States, in 2014. If the jury had found Weier not to be mentally ill, she would have faced prison time.
Her friend, Morgan Geyser, who helped with the stabbing has pleaded not guilty by reason of mental disease.
"She knew the difference between right and wrong, but even so, she could not stop herself at the moment that mattered most because she was convinced that this character who was a fantasy in our minds today was not a fantasy but was real in her mind and that he would kill her and kill her family", said Dr. Gregory Van Rybroek. The two young ladies ended up plainly fixated on Slender Man and Weier trusted the creature could read her brain and would execute her family or her on the off chance that she discussed him, McMahon guaranteed.
Both girls involved in stab attack told detectives that they did it in order to protect their families from the supernatural devil who depicted as resembling unnaturally tall and thin man with a featureless and black face, who wears a black suit only.
A psychologist has testified that a 12-year-old girl suffered from a shared delusion with a friend that led to the stabbing of another girl in a Wisconsin park in 2014.
Weier told authorities that she and Geyser believed they had to kill Leutner or else Slender Man would kill them and their families. McMahon said before the inconsistent verdict came in Weier "was shaking so hard, she was shaking me".
On Friday, 10 of 12 jurors - the minimum required by law - voted Weier mentally ill, the AP reported.
Slender Man first appeared on the internet in 2009.
Melissa Westendorf was appointed by a judge to evaluate one of the girls, Anissa Weier, now 15, after her insanity plea. She was not accessible a short time later, but rather McMahon said she was diminished and cried following the decision.
The Journal Sentinel reports Fisher testified Wednesday that Leutner told her Geyser had become obsessed with Slender Man and other scary characters on the Creepypasta website.
Anissa Weier, 15, confessed to endeavored second-degree purposeful crime in an arrangement with prosecutors yet guaranteed she was rationally sick at the season of the assault and was not in charge of her activities.
Both Weier and Geyser were charged with being a party to attempted first-degree intentional homicide. Weier pleaded guilty to attempted second-degree homicide due to mental illness as part of a plea agreement in August.