Interactive visualization could become an essential tool in the work of investigative analysts. Visualization could help analysts to explore large collections of data and documents, supporting the analysts' investigative sense-making processes. This panel gathers recognized leaders from three important domains, investigative reporting, biosciences (genomics), and intelligence analysis, that all include a fundamental investigative analysis component. The panelists will provide a glimpse into their worlds, describing and illustrating the data they examine, the goals and methods of their analysts, and the culture of their respective professions. In particular, the panelists will explore how visualization could potentially benefit investigators from their domain and they will provide guidance for visualization researchers seeking to collaborate with their colleagues.