Most bad actors — from extremists to scamsters and oligarch enablers — seek to hide information about themselves, their projects, and their assets. But open source tools, social media connections, and leaks databases hold the power to surface their true origins with as little as an email address or footnote reference. Even Google reviews and fitness apps like Strava can offer insights that can unlock a powerful investigation. In this panel, journalists who train others in open source research share powerful tips and tools to defeat secrecy, as well as dig into case studies that show how they work in practice.