Acquitted of second-degree murder and manslaughter by a Florida jury, George Zimmerman still faces federal scrutiny and a possible civil suit that could compel him to do something he avoided at his trial: testify. The not-guilty verdict Saturday night spelled the end of the riveting state criminal case against Zimmerman, who claimed self-defense in his fatal shooting of Trayvon Martin, but his legal odyssey may be far from over. "We clearly must move on to the next step in terms of the federal government and the civil courts," the Rev. Al Sharpton said on MSNBC after the verdict, and he told Savannah Guthrie on the "Today" show Monday that demonstrators nationwide will push Saturday for federal civil rights charges. The Justice Department began looking into the case less than a month after the Feb. 26, 2012, shooting, and the NAACP launched a MoveOn.org petition Sunday calling for civil rights charges.