The Slender Man quickly became an internet phenomenon and went viral. This rise in popularity spawned numerous works of fan fiction, cosplays, online fiction and more.

Wisconsin judge delays "Slender Man" stabber Morgan Geyser's release from a mental health facility due to her proximity to the victim.

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A judge has refused to block a psychiatric hospital from releasing a Wisconsin woman who stabbed her sixth-grade classmate to please the horror character Slender Man.

A Waukesha County judge ruled against the state's petition to stop the conditional release of Morgan Geyser, convicted in the Slender Man stabbing that took place more than a decade ago.

Morgan Geyser, convicted in the 2014 Slender Man stabbing attack in Waukesha, will be re-examined by doctors.

Motion filed to stop Slender Man stabbing assailant's release from mental health facility Three psychologists had testified Morgan Geyser is mentally ready for supervised release.

The Wisconsin woman, who at age 12 conspired with a friend to brutally stab a classmate to please fictional horror character "Slender Man," is well enough to be released from a psychiatric ...

Woman who stabbed classmate to please Slender Man can be released from psychiatric hospital ...

Morgan Geyser, one of the two assailants in the 2014 Slender Man stabbing case, will be released from a mental health facility, a judge ruled Thursday.