It may be a good idea to speak to an attorney first.nitrogen wrote:Lawyer up now.
I look at it this way. Agencies don't use email to contact anyone concerning an investigation or field audit. It almost smells like a scam, except that the English is better than that of a 419er. If they were able to acquire your email address and some identifiers on who you are through legal law enforcement means, then it probably would not take much more effort to actually find your address and phone number.
You could call the SA office to confirm that there is such an agent there.
IANAL.