MILWAUKEE — A second girl accused of plotting to kill a sixth-grade classmate in the Slender Man stabbing case pleaded not guilty by reason of mental disease or defect Friday in a Wisconsin court.
Waukesha County Circuit Court Judge Michael Bohren ordered that Anissa Weier be evaluated by two doctors by Oct. 6. The next hearing in the case for both Weier and her co-defendant, Morgan Geyser, is set for Oct. 13.
Geyser entered the same plea at a hearing last month.
Weier and Geyser, now 14, were 12 when prosecutors say they plotted and attempted to kill their classmate and friend Payton Leutner in May 2014.
Leutner was stabbed 19 times and left for dead in a Waukesha park the morning after a sleepover party for Geyser's 12th birthday but managed to crawl near a path, where she was found by a passing bicyclist.
Both defendants later told police they were trying to either impress or avoid the wrath of Slender Man, a fictional internet boogeyman the girls said they believed would harm them or their families if they didn't kill their friend.
They were charged as adults with attempted first-degree intentional homicide. Efforts to have their cases transferred to juvenile court were denied.
A defendant entering a not guilty by reason of mental disease plea contends that at the time she committed a crime, a mental disease or defect prevented them from appreciating the wrongfulness of their action, or from conforming their conduct to the law.
Someone found not guilty by reason of mental disease or defect is typically committed to a state mental hospital for treatment.
Geyser, who has been diagnosed with early onset schizophrenia, has already spent months at Winnebago Mental Health Institute under a separate civil commitment.
During earlier hearings, mental health experts testified that Weier was competent to proceed with the case but had not done more extensive evaluations required. She is being held at a juvenile detention center.
No trial date has been set in the case.