Vera’s Cost-Benefit Analysis Unit convened a working group of researchers, practitioners, and policymakers with expertise in law enforcement and public safety technologies to discuss how public safety agencies use cost-benefit analysis (CBA) as a tool to inform budgetary decisions about the use of public safety technologies (PST)—such as DNA databases or risk-assessment tools. Input from the working group helped shape this report, which helps readers understand the intersection of CBA and PST, how CBA can be best applied to PSTs, and the challenges of using CBA to as a decision-making tool for PSTs. The report was written to help guide researchers, practitioners, and policymakers who are facing the same issues of determining the relative costs and benefits of adapting certain PSTs in their agencies.