Out of the Woods

20/20 goes to Waukesha, Wisconsin to examine the May 2014 stabbing of 12-year-old Payton Leutner. Payton was at a sleepover with her friends Morgan Geyser and Anissa Weier. The two girls lured Payton into the woods and stabbed her 19 times to impress the 'Slender Man'. Payton survived the attack and the two girls were arrested.