The victim, Payton Leutner, and the perpetrators, Anissa Weier and Morgan Geyser, were all 12 years old at the time of the stabbing, and were classmates enrolled in the same school.[4][5] The school's principal later confirmed that neither Weier nor Geyser had any prior disciplinary issues.[6][7] They had been at a sleepover together the night before the stabbing.[8] The attackers had discovered Slender Man on the Creepypasta Wiki.