Certified FETI® is the founding and governing body of the official Forensic Experiential Trauma Interview, a science and practice-based interviewing methodology informed by the latest research on the neurobiology of trauma and memory. What is FETI® (Forensic Experiential Trauma Interview)? The Forensic Experiential Trauma Interview (FETI®) provides interviewers with a science-informed interviewing framework that maximizes opportunities for information collection and accurately documents the participant's experience in a neutral, equitable, and fair manner.