Denise C. Gottfredson is a Professor at the University of Maryland Department of Criminal Justice and Criminology. She received a Ph.D. in Social Relations from The Johns Hopkins University, where she specialized in Sociology of Education. D. Gottfredson's research interests include delinquency and delinquency prevention, and particularly the effects of school environments on youth behavior. Much of Gottfredson’s career has been devoted to developing effective collaborations between researchers and practitioners. She recently completed randomized experiments to test the effectiveness of the Baltimore City Drug Treatment Court, the Strengthening Families Program in Washington D.C., and after school programs in middle schools. She is currently conducting a randomized trial testing the effectiveness of a family therapy intervention on gang involvement and crime among gang members.