I received two messages on my answering machine from a Dennis Gray with the United States Treasury Dept. regarding a so-called "Federal Criminal Offense" and the need to appear before a grand jury!  I was suspicious right away because he said "We are trying to contact you regarding..." But did not say a name.  He left a regular phone number and not an 800 number.  I would think if it were a matter this serious, they would have sent a subpoena long before calling!