He says any guards who acted improperly should be held accountable . Guards receive target letters from Justice Department that often precede arrests . Guard says its men were ambushed ; witnesses say guards were not provoked . Witnesses say motorists , children and innocent were among those killed .
Blackwater says any guards who acted improperly should be held accountable . Guards receive target letters from Justice Department that often precede indictments . Blackwater says its men were ambushed ; witnesses say guards were not provoked . Witnesses say motorists , children and innocent bystanders among those killed .