He has published widely on these and related matters in the British Journal of Criminology, Policing and Society, Public Management Review, the Journal of Contemporary Ethnography, Criminology and Criminal Justice and many other journals. His books include Policing the Police (Policy Press, 2020) and Accountability in Policing: Contemporary Debates (Routledge, 2015, edited with Stuart Lister) and Introduction to Policing (Sage, 2018, third edition). He is editor of the International Journal of Police Science and Management.