With law enforcement in many democracies focusing on the need to develop a policing culture committed to society’s ethical values, the issue of moral injury – when an officer experiences psychological distress arising from actions (or a lack of action) that violates their own moral code – has come to the fore; Policing Insight’s Matthew Wood, a former Toronto Police officer and now part-time professor, explores the concept of moral injury, it’s impact on officers and communities, and what can be done to address the issue.