A perpetrator in the so-called Slender Man stabbing was found in Illinois Sunday after escaping a group home the day before.

Morgan Geyser was charged with murder for the 2014 stabbing of her friend, Payton Leutner. Geyser and co-defendent Anissa Weier were found not guilty by reason of mental defect in 2017.

Here's what we know about Geyser and the Slender Man killing case.

Who is Morgan Geyser?

Geyser, who is now 23, was charged with attempted homicide at age 12 after stabbing her friend, Payton Leutner, and leaving her for dead in Waukesha, Wisconsin. She's one of two perpetrators of the stabbing, which she and co-defendant Anissa Weier claimed was done to appease Slender Man.

Both women were found not guilty by reason of mental defect in 2017. Geyser was diagnosed with early-o

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