Who is Slender Man? Slender Man, a menacing, faceless man in a dark suit – sometimes portrayed with octopus-like tentacles – was a crowdsourced internet-created boogeyman that first appeared in an online forum in 2009,

The case surrounding a stabbing that became known nationwide as the "Slender Man stabbing" more than a decade ago took a new twist over the weekend.

"If they had stolen a candy bar, sure that's a child," said Payton Leutner, who is now 17. "But you tried to kill somebody. That's an adult crime."

Morgan Geyser is missing after she cut off her monitoring bracelet and left a group home. Here's a timeline outlining her case and conditional release.

Geyser and a friend lured a classmate to the woods and stabbed her 19 times in 2014. She moved from a psychiatric facility to a group home in Wisconsin earlier this year.

Morgan Geyser, one of the teens involved in the Slender Man stabbing, is back in the spotlight after fleeing supervised care, reigniting debate about juvenile violence, mental illness and internet-inspired crime.