Kevin Lamarque/Reuters
John Doar, a country lawyer from Wisconsin who led the federal government's efforts to dismantle segregation in the South and later headed the team that made the case for impeaching President Richard Nixon, has died of congestive heart failure at age 92. It was Doar, along with a federal marshal, who escorted James Meredith when Meredith integrated the University of Mississippi in 1962; who led the successful prosecution of the men who killed three young civil rights workers in Mississippi in 1964 and who defused a standoff between civil right protesters and police with their guns drawn in Jackson, Mississippi. In 1974, Doar was named chief counsel to the House Judiciary Committee investigating Watergate. President Obama awarded him the Presidential Medal of Freedom in 2012.