Are they free-lance "liberators": "A U.S. investigation of the July 14 incident concluded that no American contractors were responsible, a finding disputed by the Ismaels, other witnesses, local politicians and the city's top security official, who termed it a coverup. No one has yet been held responsible.Recent shootings of Iraqi civilians, allegedly involving the legion of U.S., British and other foreign security contractors operating in the country, are drawing increasing concern from Iraqi officials and U.S. commanders who say they undermine relations between foreign military forces and Iraqi civilians."