Slender Man stabbing victim says defendant obsessed

FILE- In a Monday, Feb. 20, 2017 file photo, Anissa Weier, 15, appears in court in Waukesha, Wis. Weier, one of two Wisconsin girls charged with repeatedly stabbing a classmate to impress the fictitious horror character Slender Man, pleaded guilty Monday, Aug. 21, 2017, to attempted second-degree homicide as a party to a crime, with use of a deadly weapon. She initially faced a charge of attempted first-degree intentional homicide in the 2014 attack on Payton Leutner in Waukesha, a city west of Milwaukee.(Michael Sears/Milwaukee Journal-Sentinel via AP, Pool, File)

WAUKESHA, Wis. (AP) – The Latest on the mental competency trial of a teen accused in the stabbing of a classmate to appease a fictional horror character called Slender Man (all times local):

A second psychologist has testified about the delusional mental state of a girl who’s admitted to helping stab a classmate nearly to death in a Wisconsin park in 2014.

Gregory Van Rybroek took the stand in a Waukesha County courtroom Thursday at Anissa Weier’s trial. Jurors will determine whether she was mentally ill when she helped stab Payton Leutner. Such a verdict would send Weier to a mental health facility instead of prison.

Van Rybroek, a forensic psychologist, told jurors Weier “couldn’t stop herself” and helped stab Leutner even though she knew it was wrong. Van Rybroek is the second court-appointed expert to evaluate Weier’s insanity plea.

Weier and co-defendant Morgan Geyser told investigators they stabbed Leutner to appease Slender Man, a fictional horror character. The girls were 12 at the time.


6:45 p.m.

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.

Melissa Westendorf testified Wednesday at the mental capacity trial of Anissa Weier, now 15. Westendorf was appointed by a judge to evaluate Weier after her insanity plea.

Westendorf said she believes Weier suffered from a shared delusional disorder that left her unable to conform her conduct to the law when she and Morgan Geyser tried to kill their friend.

Authorities say the two were motivated by a fictional horror character called Slender Man to stab Payton Leutner 19 times in a Waukesha park. The girl survived.

The Journal Sentinel reports Westendorf acknowledged under cross-examination that the condition is rare among two children who are friends.


1:10 p.m.

A detective who interviewed a 12-year-old girl stabbed repeatedly in a Wisconsin park in 2014 has testified that one of two classmates accused of attacking her had been scaring her with stories about the fictional horror character Slender Man before the attack.

It was Slender Man that authorities say motivated the two sixth-grade classmates to stab Payton Leutner 19 times in a Waukesha park.

Waukesha Police Detective Shelly Fisher’s testimony Wednesday came in the trial of Anissa Weier. Jurors will determine whether she was mentally ill at the time of the stabbing. Co-defendant Morgan Geyser is scheduled to go on trial next month.

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.

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