In Part 3 of our series on health care investigations, Mark Rush and John Lawrence discuss the process for external investigations conducted by federal and state governmental agencies, including in the context of qui tam actions arising under the False Claims Act. The episode provides an overview of the actions that may be taken by governmental agencies when conducting an investigation, and how the subjects or targets of these investigations may be requested to respond through Civil Investigative Demands (CIDs), subpoenas, or search warrants.