Factitious Disorder Imposed on Another (FDIA), formerly known as Munchausen by Proxy, involves a caregiver fabricating or inducing illness in someone, usually a child, for attention. Forensic psychologists diagnose FDIA through interviews, medical record reviews, and psychological assessments. Victims often suffer long-term trauma, requiring therapy for recovery. Perpetrators face serious legal consequences, including charges of child abuse and medical fraud, though insanity defenses are rarely successful. Forensic psychologists provide crucial testimony, explaining the abuser’s motives and the impact on the victim to ensure justice.