I got the file from our lawyer, and from what I can see, the misrepresentation didn't come from the marriage date. The paperwork showed the true marriage date, which was past the 90-day window. Thus, she did not willfully misrepresent herself.
Since that wasn't it, I dove into her file for something that went wrong in Aug 1, 2006. I saw something interesting in the file my ex-lawyer got from FOIA. There were what appear to be a screenshots/printouts from TECS II (system used by border patrol for suspicious activities) that showed whatever recorded on that system was on Aug 1, 2006. However, due to (b)(6)(e) and (b)(6)(c), all important information was redacted.
Since there's nothing else that I can find that occurred on Aug 1, 2006, this is all I have. I there any way I can get the info that was redacted?