Damon, when he was 11, watched something that changed his life forever. And after "being in" jail for years he gets offered a job at the BAU. But something was always off about Damon. No one knew what. Maybe it was his hair Or his clothes Or the fact that he had a whole other life outside (or inside) the BAU Only when that life called, did Damon act differently After being in these positions for so long and his past trauma. Damon started to see things. Shadows that weren't there. He started talking to himself and hearing voices that weren't there. That was never there. He just tried to ignore them and get through the day.