http://digbig.com/4kpws
"Federal authorities are increasingly using DNA tests to confirm the identities of certain would-be immigrants, according to companies that perform the tests. Testing is done in cases where U.S. citizens or green card holders sponsor people they claim are close relatives to immigrate legally. In some instances, documents such as birth, marriage, school or medical certificates are missing or are not enough to convince authorities that the process is free of fraud."