This document discusses complex post-traumatic stress disorder (CPTSD) in individuals with autism spectrum disorders (ASD). It presents a case study of a child with ASD and mild intellectual disability who was physically, emotionally, and sexually assaulted, leading to symptoms of CPTSD like insomnia, hallucinations, withdrawal, and increased stereotypies. However, he was misdiagnosed with schizophrenia and subjected to inappropriate treatments. The document argues for the need to modify cognitive behavioral therapy (CBT) to effectively treat CPTSD in individuals with ASD, given their unique experiences of trauma and difficulties assessing internal states, social relationships, and finding meaning. It highlights principles from trauma treatment and suggestions for modifying the