Dewey G. Cornell, Ph.D. is the Virgil Ward Professor of Education in the School of Education and Human Development at the University of Virginia. Trained as a forensic clinical psychologist, Dr. Cornell worked extensively with violent offenders before collaborating with the FBI in their landmark study of school shootings. In 2001, he led the development of the Comprehensive School Threat Assessment Guidelines, which is supported by 20 years of research and is now widely used nationwide. For the past several years he has worked with the Utah State Board of Education to bring threat assessment to Utah schools.