Yvonne Smith is a clinical hypnotherapist who began her therapy practice in 1990. She started working with PTSD victims using hypnosis as a way to help them assisting them to work through and cope with their traumatic experiences. She observed that some of her subjects were describing a pattern of alien abduction and other close encounter experiences.

She has worked with Budd Hoppkins and Dr. John Mack as she continued her research with abductees.

link