Understanding crime in the European Union (EU) is a complex endeavour. National differences in how crime data are collected and reported are important, albeit partial, explanations for the complexity. To improve cross-national comparisons and benchmarking in crime and criminal justice policy, the European Commission Directorate-General for Home Affairs commissioned RAND Europe to create a framework for developing a European Crime Report (ECR). In particular, RAND Europe scoped data availability issues and current projects and information that could feed into an ECR. Furthermore, a variety of stakeholders were interviewed to provide a more comprehensive, reliable assessment of opportunities and challenges to developing an ECR.