NEW : Detainee 's son : `` We 're pretty sure they will be ... released with no charges '' Sources : 5 men detained in connection with death of fellow Iraq contractor in U.S. . U.S. Embassy : Five contractors in custody in Iraq , but not on murder suspicion . If that happens , it would mark the first time U.S. citizens go to trial in that country since the United States returned the nation 's government to the Iraqis . Contractor Sarah Smith found bound , blindfolded and fatally stabbed .
NEW : Detainee 's son : `` We 're pretty sure they will be ... released with no charges '' Sources : 5 men detained in connection with death of fellow Iraq contractor in U.S. . U.S. Embassy : Five contractors in custody in Iraq , but not on murder suspicion . Contractor Sarah Smith found bound , blindfolded and fatally stabbed .