[FreeReign]

This was not about identifying who they were. That is done by checking names and DOB’s in the computer and verifying documents.

What documentation was checked? Some documents can be forged -- fingerprints can't.

From the information I've see so far, this is indeed about identifying who they are.

[Marine Inspector]

Some documents can be forged

True, and some of the best document fraud experts are CBP officers.

And yes, fingerprints can be forged. Well not forged, but altered.