John’s primary research interest centers on American policing with specific focuses on environmental and organizational contexts as well as contemporary issues. It attempts to study discretionary police behavior by placing officers in the neighborhoods, departments, and sub-units in which they work. He’s interested in how these characteristics of neighborhoods and departments affect not only officers’ perceptions of the job and citizens, but also a host of policing outcomes such as use of force and transactional gun violence as well as traffic stops and post-stop outcomes. John has produced scholarship to inform public, political, and academic debates surrounding crime and policing since 2014, which include examining national-level crime rates to determine if there was evidence of a “Ferguson Effect”, exploring whether police departments engaged in “de-policing” or intentional pullbacks in response to perceived increased scrutiny, if there was evidence of a “War on Cops” stemming from the Black Lives Matter movement, and how the COVID-19 pandemic affected police departments and their officers. His work is inherently multidisciplinary and it straddles public administration and public health, among other fields.
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