His doctorate comes from the University of Nevada, Las Vegas, in concentrations including political sociology, criminology and deviance. He is the author of over 50 articles, book chapters, and various governmental documents focused primarily on transportation related to terrorism attacks, radiological terrorism, and attacks against nuclear waste shipments and storage facilities. In 2002, he testified in both the United States House and Senate on risks of attacks against shipments to the proposed high-level radioactive waste facility at Yucca Mountain. He has also worked over the last several years on various NATO projects related to terrorism.