Accused Slender Man stabber Morgan Geyser isn't mentally fit to stand trial, her attorney argued Tuesday.
Geyser has been receiving mental treatment since August. A judge ordered the treatment after a state psychologist testified that the 12-year-old girl claimed to see fictional characters including Slender Man and figures from the Teenage Mutant Ninja Turtles and Harry Potter franchises.
But Tuesday, attorney Anthony Cotton said the treatment hasn't improved Geyser's mental state, the Associated Press reported.
"We don't think anything has changed in terms of her functioning," Cotton said. Cotton added that he plans to have a doctor testify at an upcoming hearing to confirm that Geyser is mentally incompetent to stand trial.
Cotton also praised the quality of Geyser's recent treatment, saying it was better than what she received while in jail. However, if she is found competent to stand trial she will likely be headed back to jail, the AP reported.
Geyser is accused along with Anissa Weier of stabbing a 12-year-old girl 19 times in order to please Slender Man, a fictional character and internet meme.
The girls reportedly wanted to become "proxies" of Slender Man, who is depicted as a tall, faceless figure. The attack happened in June during a sleepover, and Geyser and Weier reportedly only missed one of the victim's major arteries by a millimeter.
Weier was found competent to stand trial in October. However, her attorneys also are challenging that ruling.
Both girls have competency hearings scheduled for Dec. 18.