John L. Worrall is Professor of Criminology and Program Head at the University of Texas at Dallas (UTD). A Seattle native, he received a B.A., double majoring in psychology and law and justice, from Central Washington University in 1994. Both his M.A. (criminal justice) and Ph.D. (political science) were received from Washington State University, where he graduated in 1999. From 1999-2006, he was a member of the criminal justice faculty at California State University, San Bernardino. He joined UTD in Fall 2006, was promoted to full professor in 2008, and in 2010 was selected to direct the criminology program. Dr. Worrall has published articles and book chapters on a wide range of topics ranging from legal issues in policing to crime measurement, having recently been ranked one of the most prolific sole and lead authors in the discipline. Courses he regularly teaches (and has authored texts for) include introductory criminal justice, criminal procedure, and crime control policy. As Program Head at UTD, Dr. Worrall directs undergraduate, M.S., and Ph.D. programs in criminology, including an online MS program, which he developed. He is active in the Academy of Criminal Justice Sciences, the American Society of Criminology, and a number of regional associations. Finally, he continues to serve as editor of the journal Police Quarterly, a position he has held since 2008. Larry J. Siegel was born in the Bronx in 1947. While living on Jerome Avenue and attending City College of New York (CCNY) in the 1960s, he was swept up in the social and political currents of the time. He became intrigued with the influence contemporary culture had on individual behavior: Did people shape society or did society shape people? He applied his interest in social forces and human behavior to the study of crime and justice. After graduating from CCNY, he attended the newly opened program in criminal justice at the State University of New York at Albany, earning both his M.A. and Ph.D. degrees there. After completing his graduate work, Dr. Siegel began his teaching career at Northeastern University, where he was a faculty member for nine years. After leaving Northeastern, he held teaching positions at the University of Nebraska-Omaha and Saint Anselm College in New Hampshire. He then taught in the School of Criminology and Justice Studies at the University of Massachusetts-Lowell for more than 26 years. Now a Professor Emeritus, he continues to teach online courses. Dr. Siegel has written extensively in the area of crime and justice, including books on juvenile law, delinquency, criminology, criminal justice, and criminal procedure. He is a court certified expert on police conduct and has testified in numerous legal cases.