The error occurred because the immigrants used different names or birthdates to apply for citizenship with U.S. Citizenship and Immigration Services and the authorities had not their finger prints.
In fact, fingerprints exists but can’t be searched from federal databases for as many as 315,000 immigrants with final deportation orders or who are fugitive criminals because older, paper records, were never added to fingerprint databases created by both the now-defunct Immigration and Naturalization Service and the FBI in the 1990s. Immigration officials are in the process of uploading these files and that officials will review “every file” identified as a case of possible fraud. The Justice Department has now agreed to focus on cases involving people who have acquired security clearances, jobs of public trust or other security credentials. It is known at this moment that at least three immigrants were able to acquire jobs with access to secure areas on airports or maritime facilities and a fourth person is now even a law enforcement officer. It will not be an easy task to do.