This brief discusses the potential benefits and underutilization of Regression Discontinuity Design (RDD) in evaluating justice interventions. RDD is highlighted for its ability to credibly estimate causal impacts by comparing outcomes for individuals near a predetermined cutoff, making it a valuable alternative when Randomized Controlled Trials (RCTs) are not feasible. Despite its methodological strengths, the use of RDD in justice settings remains infrequent due to factors such as lack of awareness and challenges in identifying appropriate contexts. The authors provide several recommendations to promote RDD, including intentional naming in Requests for Proposals, targeted training for researchers, and raising awareness among policymakers. They emphasize the importance of collaboration with government researchers and the development of an RDD registry to share successful applications. The paper calls for a wider adoption of RDD in order to enhance evidence-based decision-making in crime and justice policy.