Investigative Researcher Charles Lewis He's the founder and executive director of the Center for Public Integrity. It's a nonprofit, nonpartisan research organization in Washington, D.C., similar to an investigative journalism outfit but without time and space constraints. Its mission is to expose corruption and power abuse by governments, corporations and individuals. For 11 years, Lewis was an investigative reporter at ABC News, and also worked at CBS on 60 Minutes. His work at the Center for Public Integrity has been widely praised.