A top administrator for the Environmental Protection Agency has resigned over the lead-poisoned water in Flint, Michigan. The crisis began when the unelected, state-appointed emergency manager of Flint switched the source of the city’s drinking water to the highly corrosive Flint River. Susan Hedman oversaw the EPA’s regulations in Midwestern states including Michigan. Hedman is the latest official to step down, including the director of Michigan’s Department of Environmental Quality, Governor Snyder’s chief of staff and chief spokeswoman, and the Flint director of Public Works. Michigan residents are calling for the resignation of Governor Rick Snyder. Many are also calling for his arrest.