Attorney General Holder vows thorough review in Trayvon Martin case (CBS/AP) WASHINGTON - Attorney General Eric Holder said Wednesday that the Justice Department will take appropriate action in the killing of Trayvon Martin if it finds evidence that a federal criminal civil rights crime has been committed. The attorney general made the comments in an appearance before a civil rights organization founded by the Rev. Al Sharpton. Holder said the department will conduct a thorough and independent review of the evidence in the Martin matter. One of the department's top priorities, said Holder, is preventing and combating youth violence and victimization. The Justice Department launched an investigation of the Martin killing three weeks ago. "I know that many of you are greatly - and rightly - concerned about the recent shooting death of 17-year-old Trayvon Martin, a young man whose future has been lost to the ages," Holder told the 14th annual convention of the National Action Network. "If we find evidence of a potential federal criminal civil rights crime, we will take appropriate action," said the attorney general. I also can make you another promise: that at every level of today's Justice Department - preventing and combating youth violence and victimization is, and will continue to be, a top priority. Where is George Zimmerman? The attorney general says that Justice Department officials including Tom Perez, the assistant attorney general for the civil rights division, and U.S. Attorney Robert O'Neill from Florida have traveled to Sanford to meet with the Martin family, members of the community and local authorities. He says representatives from the department's Community Relations Service are meeting with civil rights leaders, law enforcement officers and residents to address community tensions. Neighborhood watch volunteer George Zimmerman says he shot Martin in self-defense after following the teenager in a Sanford, Fla. a gated community outside Orlando on Feb. 26. He said he was returning to his truck when Martin attacked him and that he shot the unarmed teen during the fight. He wasn't arrested partly because of Florida's "stand your ground" self-defense law. Martin was black. Former lawyers for Zimmerman say he's losing weight, suffering from high levels of stress and unable even to perform the simple task of buying a soda because of the intense public scrutiny he's under. Hal Uhrig and Craig Sooner announced Tuesday they were no longer representing George Zimmerman, the neighborhood watch volunteer, because they haven't heard from him since Sunday.