15-year-old Anissa Weier, accused in the “Slender Man” stabbing of a 12-year-old classmate, pleaded guilty to attempted second degree intentional homicide.

Weier is charged along with Morgan Geyser. Prosecutors in Waukesha County say the defendants wanted to kill in order to appease a supernatural figure called the “Slender Man.”

Watch today’s hearing in the player above via FOX 6.