Skip to Content

Attorney: Slender Man stabber’s confession should not have been allowed in trial

WAUKESHA (WISN) — The legal team for one of the girls tried in the Slender Man stabbing case is arguing her confession should not have been admissible during the trial.

Morgan Geyser, 17, is serving a 40-year sentence of state mental health supervision, and she’s getting some powerful help in trying to overturn her conviction.

Five years ago, two Waukesha sixth graders stabbed a classmate 19 times and left her for dead. The reason shocked the nation.

The girls said they did it in fear of and to impress the internet boogeyman Slender Man.

“What were you trying to do when you stabbed her?” Waukesha police Detective Thomas Casey asked Geyser during her interrogation after the stabbing.

“Kill her. I might as well just say it. We were trying to kill her,” Geyser said.

The recorded confession in 2014 at the Waukesha Police Department is a main issue in Geyser’s appeal.

“What did you do next?” Casey asked,

“I already told you,” she said.

“What was that?” Casey asked.

“Stab. Stab. Stab. Stab. Stab,” she said.

Geyser was found not guilty by reason of mental disease and was sentenced. Her appeal challenges whether she really had the ability to waive her rights against incriminating herself.

“When she said she would give a statement waiving her rights, she didn’t have any comprehension of what those rights were,” Geyser’s attorney, Matthew Pinx, said.

This week, the appeal gained some allies, with the Philadelphia-based Juvenile Law Center among those filing a supporting brief.

“We are deeply concerned that this was simply not a lawful or constitutional waiver of her rights,” said Marsha Levick of the Juvenile Law Center.

Prosecutors maintain “the video evidence in particular shows Geyser as a smart, responsive, calm girl who was capable of understanding the rights explained to her.”

Geyser’s lawyer said it will likely be three to six months before a decision is made on whether she would get a new trial.

Depending on the decision, the case could be headed to the state Supreme Court.

Chris Watkins

Social Media & Digital Content Manager

Skip to content