This document summarizes a case study of a 37-year-old woman with dissociative identity disorder due to long-term sexual abuse. She began experiencing flashbacks and identity fragmentation at age 30, taking on differentiated and opposed personality components. The persistence of her dissociative symptoms over many years and their negative impact on her functioning provide evidence of a correlation between chronic trauma and long-term dissociative disorders. Her dissociative personalities included an aggressive entity, central organizer, representations of her abusive father and silent mother, her childhood self, and identities focused on bodily harm and pain.