Marv Krohn is currently a Professor in the Department of Sociology and Criminology & Law at the University of Florida. Professor Krohn has a long-standing interest in the etiology of delinquency and drug use, focusing primarily on social process and life course approaches.  For the past thirty years he has been a Co-Principal Investigator on the Rochester Youth Development Study, a three generational longitudinal panel study targeting those at high risk for serious crime and delinquency.  His book (with co-authors Terence P. Thornberry, Alan J. Lizotte, Carolyn A. Smith and Kimberly Tobin), Gangs and Delinquency in Developmental Perspective, was the American Society of Criminology's recipient of the 2003 Michael J. Hindelang Award for Outstanding Scholarship.  Professor Krohn also co-authored Delinquent Behavior (with Don C. Gibbons) and Researching Theories of Crime and Delinquency (with Charis E. Kubrin and Thomas D. Stucky) and has co-edited seven compendiums on crime and delinquency.  In addition, he has contributed numerous research articles and book chapters.  He is a former Vice President and Executive Counselor of the American Society of Criminology and was named a Fellow of that Society.  Professor Krohn has also won teaching awards at both SUNY Albany and the University of Florida and most recently was presented with the Outstanding Mentor Award by the Academy of Criminal Justice Sciences.

Gina Penly Hall, Ph.D. has published numerous articles and book chapters over the years. At the core of her substantive interests are the theoretical ideas of social ecology, with her research focusing on how human behavior is a product of how individuals interact with their environments.  She currently works with youth in a school setting as a Learning Strategist where she coordinates and implements academic and behavioral interventions.

Alan Lizotte Distinguished Professor in the School of Criminal Justice, The University at Albany. He is co-principal investigator on the Rochester Youth Development Study, an ongoing thirty year longitudinal study of juvenile delinquency and drug use covering three generations of subjects.  His substantive interests include illegal firearms ownership and use and developmental criminology.  In 2003, he and his coauthors were awarded the American Society of Criminology's Hindelang Award for the book Gangs and Delinquency in Developmental Perspective. Professor Lizotte is an American Society of Criminology Fellow.