Revealed: Father of girl, 12, who stabbed 'school friend 19 times to prove Slender Man myth was real’ proudly shared her sketch of horror creature on his ‘DEADBOY’ Instagram The parents of Morgan Geyser, one of the two 12-year-olds charged with trying to murder their friend, have Instagram feeds featuring skulls Morgan and her friend Anissa Weier were allegedly trying to be proxies for a mythological horror creature called Slenderman with the attack In one Instagram post from mid April, Morgan's father Matt shared a photo of a drawing 'Mogo' made of Slenderman His handle is 'deadboy420' in homage to a 'stoner rock' band Both her father Matt and mother Angie have Gothic-themed photos Email addresses connected to Matt Geyser were various forms of 'ILOVEEVIL' and sometimes included '666' at the end The friend that Geyser and Weier stabbed 19 times miraculously survived and is said to be in stable condition at a hospital in Wisconsin