NEW : George Hennard makes a reference to the June 15 rape and murder of an Muslim girl . Additional charges are likely against the Killeen Police Department , a San Antonio attorney 's spokesman says . Abdo is being held without bond by federal authorities . He is a `` very dangerous individual , '' the police chief says .
NEW : Naser Jason Abdo makes a reference to the 2006 rape and murder of an Iraqi girl . Additional charges are likely against Abdo , a U.S. attorney 's spokesman says . Abdo is being held without bond by federal authorities . He is a `` very dangerous individual , '' the police chief says .