There are generally three reasons a person may receive a grand jury subpoena:
(1) The person is a “target,” meaning that the grand jury has substantial evidence linking the person to the commission of a crime and the prosecutor will likely move to indict that person.
(2) The person is a “subject,” meaning that person’s conduct is within the scope of the grand jury’s investigation
(3) The person is a “witness” meaning that the person is not under investigation but has personal knowledge of facts relevant to the grand jury investigation. You may be a witness for several reasons. For example, the grand jury may subpoena a current employee of a company managed by persons who are potential defendants.