Slenderman attacker: 'We were trying to kill her'

One of two 12-year-old girls who repeatedly stabbed a Wisconsin classmate in the so-called Slenderman attack told investigators "we were trying to kill her" in the hours after the attack.

Morgan Geyser and Anissa Weier brutally attacked Payton Leutner in the woods in the Milwaukee area in May of 2014. Investigators say Geyser stabbed Leutner 19 times while Weier urged her on.

"What were you trying to do with her when you stabbed her?" a detective asked Geyser in the aftermath, according to video obtained by ABC News and People.

"Kill her," Geyser responded. "I might as well just say it. We were trying to kill her."

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Anissa Weier is led out of the courtroom by a sheriff's deputy on Aug. 21, 2015 during the arraignment of the Slenderman stabbing trial in Waukesha County Court in Waukesha, Wis. The court entered a not guilty plea for them and moved to set a trial date in mid-October. (Michael Sears/Milwaukee Journal Sentinel/TNS via Getty Images)
Here Morgan Geyser is brought into court by a sheriff's deputy on Aug. 21, 2015 during the arraignment of the Slenderman stabbing trial in Waukesha County Court in Waukesha, Wis. The court entered a not guilty plea for them and moved to set a trial date in mid-October. (Michael Sears/Milwaukee Journal Sentinel/TNS via Getty Images)
Waukesha, Wisc., USA. 2nd July, 2014. A judge ordered a competency hearing for one of two Wisconsin 12 year-old girls accused of stabbing their friend to please the fictional Internet character "Slenderman" after experts deemed her mentally incompetent to proceed with her defense, July 2, 2014 in Waukesha, Wisc. © Michael Sears/Milwaukee Journal Sentinel/MCT/Alamy Live News
Waukesha, Wisc., USA. 2nd July, 2014. A judge ordered a competency hearing for one of two Wisconsin 12 year-old girls accused of stabbing their friend to please the fictional Internet character "Slenderman" after experts deemed her mentally incompetent to proceed with her defense, July 2, 2014 in Waukesha, Wisc. © Michael Sears/Milwaukee Journal Sentinel/MCT/Alamy Live News
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Girl, 12, proves incompetent to stand trial. 

(Photo by Twitter / @iChicagoNews)

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LONDON, ENGLAND - OCTOBER 26: Yasmin Ouard poses as Slenderman from the series Mobile Hornets ahead of the MCM London Comic Con Expo at ExCel on October 26, 2012 in London, England. Visitors to the Comic Convention are encouraged to wear a costume of their favourite comic character and flock to the Expo to gather all the latest news in the world of comics, manga, anime, film, cosplay, games and cult fiction. (Photo by Dan Kitwood/Getty Images)
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Anissa Weier, accused of being involved in the stabbing of another girl related to the 'Slenderman' online story, is led into the courtroom on Thursday, Dec. 22, 2016 in Waukesha, Wis. (Michael Sears/Milwaukee Journal Sentinel/TNS via Getty Images)
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Geyser's mother told ABC News that she was shocked by her daughter's lack of remorse during the interview.

"The interrogation is very difficult to watch because that’s not my daughter saying those things," Angie Geyser told ABC News. "That’s not the way that she speaks, that’s not the way that she acts."

The teen suspects said the attack on Leutner was an effort to satisfy the fictional horror character Slenderman.

Leutner, who was also 12, survived the attack by crawling out of woods, and she was found by a passing bicyclist.

Geyser agreed to plead guilty to attempted first-degree intentional homicide to avoid prison, and will continue treatment in a mental hospital. A judge will rule on how long she will be committed later this week, according to ABC News.

Weier was sentenced to 25 years in a mental hospital.

With News Wire Services

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