Evidence-based policing (EBP) has become a key perspective for practitioners and researchers concerned with the future of policing. This volume provides both a review of where evidence-based policing stands today and a consideration of emerging trends and ideas likely to be important in the future. It includes comparative and international contributions, as well as researcher and practitioner perspectives. While emphasizing traditional evidence-based methods and approaches, the book also identifies barriers to the advancement of evidence-based policing and expands the vision of evidence-based policing by critically examining ethical and moral concerns and questions. The book's main focus is not on what has to happen in police agencies to advance EBP, but rather on an issue that has received far less attention - the science that is necessary to produce for EBP to be successfully integrated into policing.