Morgan Geyser , one of the two convicted individuals in the infamous 2014 “Slender Man” stabbing case, briefly went missing in late 2025 after being released from a mental institution and brought to a group home. The case attracted attention across the country, as all suspects and the victim were 12 years old at the time that Geyser and a friend stabbed their classmate to prove that “Slender Man” — the fictional supernatural internet meme — was real.

Below, learn about the “Slender Man” stabbing case and who Geyser is.

Who Is Morgan Geyser?

Geyser is a Wisconsin native who was convicted of stabbing classmate Payton Leutner when both were 12 years old. Geyser and friend Anissa Weier lured Leutner to a park in 2014 and stabbed Leutner multiple times in order to prove that Slender

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