Anissa Weier listens during jury selection in her trial at Waukesha County Courthouse Monday, Sept 11, 2017, in Waukesha, Wis. Prosecutors allege that Weier and her friend, Morgan Geyser, lured classmate Payton Leutner into a Waukesha park in May 2014 and stabbed her 19 times. The girls have said it was an effort to  to please a fictional horror character known as Slender Man.
Anissa Weier listens during jury selection in her trial at Waukesha County Courthouse Monday, Sept 11, 2017, in Waukesha, Wis. Prosecutors allege that Weier and her friend, Morgan Geyser, lured classmate Payton Leutner into a Waukesha park in May 2014 and stabbed her 19 times. The girls have said it was an effort to to please a fictional horror character known as Slender Man. Morry Gash, Pool AP Photo
Anissa Weier listens during jury selection in her trial at Waukesha County Courthouse Monday, Sept 11, 2017, in Waukesha, Wis. Prosecutors allege that Weier and her friend, Morgan Geyser, lured classmate Payton Leutner into a Waukesha park in May 2014 and stabbed her 19 times. The girls have said it was an effort to to please a fictional horror character known as Slender Man. Morry Gash, Pool AP Photo

Psychologist: Shared delusion led to Slender Man stabbing

September 13, 2017 7:24 PM