Put up a $$$ reward.
In the mean time I'll give him the benefit of the doubt but it does appear some things are being hidden, there's too many holes in his resume.
It’s not a question of his citizenship when he applied to Columbia/Harvard, but when he was born. I think he was a citizen during his college years because he and his beloved wife have spoken of paying off his college loans ... non-citizens are not eligible for financial aid. I think they DO ask about citizenship but not place of birth if you are a citizen when applying.
This whole issue could be gone in a nano-second if he’d produce a certified copy of his birth certificate .. no suits anywhere. Just makes it that much fishier.