In the fall of 2008, a girl named Katy Robinson allegedly posted a grainy photo of herself taken in a closet on 4chan's random imageboard, /b/. As the story goes, the girl was bullied relentlessly for her weight and later committed suicide.
https://io9.gizmodo.com/who-is-jeff-the-killer-and-is-his-picture-haunted-by-1016241494