No you don't. People receive subpoena to go in front of a federal grand jury, it's part of a federal investigation. There's defense attorneys are not allowed in there. The grand jury is basically not so grand. It's used by the prosecutor to obtain chargers against you or other people they're investigating. It could be you. It's important that you contact an attorney who understands federal grand jury investigations, so that they can attempt to find out from the federal prosecutor, if you're just a witness or whether you're the actual target of the investigation. Because basically they're ... Sometimes just hand in your own rope to hang yourself with in a federal grand jury.