Perry has served as a consultant and expert witness on many high-profile incidents involving traumatized children , including the Columbine High School massacre , the Oklahoma City bombing , the Waco siege , and the YFZ Ranch custody cases . His clinical research and practice focuses on examining the long-term effects of trauma in children , adolescents , and adults and has been instrumental in describing how traumatic events in childhood change the biology of the brain . He is the author of more than 200 journal articles , book chapters , and scientific proceedings and is the recipient of a variety of professional awards . Perry 's Neurosequential Model of Therapeutics is currently the working model used by Youthville 's Trauma Recovery Center in Wichita , Kansas
Oklahoma City bombing
Oklahoma City bombing
Bruce D. Perry