Ronald M. Holmes is Professor of Justice Administration at the University of Louisville. He is the author and editor of numerous books in the field, among them Murder in America, Second Edition, Current Perspectives on Sex Crimes, Sex Crimes, Second Edition, and Serial Murder, Second Edition. He is also the author of more than 50 articles appearing in scholarly publications. He is Vice President of the National Center for the Study of Unresolved Homicides and has completed more than 500 psychological profiles for police departments across the United States. He received his doctorate from Indiana University Stephen T. Holmes is Assistant Professor of Criminal Justice at the University of Central Florida. Prior to this position, he was a social science analyst for the National Institute of Justice in Washington, D.C. He has authored 6 books and more than 15 articles dealing with policing, drug testing, probation and parole issues, and violent crime. He received his doctorate from the University of CincinnatiHolmes, Ronald M. is the author of 'Profiling Violent Crimes An Investigative Tool', published 2002 under ISBN 9780761925941 and ISBN 0761925945.