Informant is a fascinating portrait of Brandon Darby, a radical left-wing activist turned FBI informant. In 2005, Darby became an overnight hero when he traveled to Katrina-devastated New Orleans and braved toxic floodwaters to rescue a stranded friend. Soon after, he co-founded Common Ground, a successful grassroots relief organization. But over the next few years, he began hiding a shocking secret. After two young protestors were arrested at the...