How do I check if my business partner is an illegal alien?

From a background check I am informed he is using another person's SSN which he most likely used to obain his NCDL as well. He is Eastern European so its not about being Hispanic but he's definitly a fraud and cheat. Other legal residents (LPRs) from his host country claim he is here illegally on an expired 90 day tourist visa. I'm told he admitted it to them.

He has been reported to NCDMV Enforcement because of the NCDL issue as he most likely obtained his NCDL with the other person's SSN. If I can get him brought in on some sort of charge by an LEO, I could have him run through the 287(g) program.

But no one seems to give a hoot!

Any help out there???