Even during periods of relatively low violence, the incidence of violent behavior by and among young people is a prominent issue. Policymakers and communities always need effective methods of addressing violent acts by youth.
Butts cautioned against inferring cause and effect or making substantial policy changes in response to what could turn out to be a temporary variation. The wide range of communities in which increases in homicides occurred indicates the trend has relatively little to do with local policies and conditions.
But while the numbers show New York City is shifting gears on criminal justice reform, much harder is to establish, the experts said, is whether new policies are causing the drop in crime or whether they are a consequence of it.... Crime numbers have been decreasing for a long time nationwide, and even worldwide, said Jeffrey Butts, a professor who leads the Research and Evaluation Center at John Jay College of Criminal Justice. He has researched the juvenile justice system since the late 1980s.
The Juvenile Justice Information Exchange (JJIE.org) hosted a Google Hangout (online live chat) between the director of the R&E Center, Jeffrey Butts, and Cynthia Lum from the Center for Evidence-Based Crime Policy at George Mason University. The conversation covered a number of topics, including the nature of evidence-based practices, how programs or practices become evidence-based, and the forces that can make the connections between evidence and practice problematic.