A Kentucky Subpoena to Testify Before Grand Jury is a legal document issued by a court or other authority in the state of Kentucky that requires a person to appear in court and testify before a grand jury. A grand jury is a body of individuals sworn to inquire into and determine whether a person should be charged with a crime. The subpoena requires the person to appear on a specified date and time, to provide testimony and/or documents that may be relevant to the investigation. There are two types of Kentucky Subpoena to Testify Before Grand Jury: a Subpoena Ducks Cecum and a Subpoena Ad Testificandum. A Subpoena Ducks Cecum is a court order that requires a person to produce certain documents or other tangible evidence for use in a legal proceeding. A Subpoena Ad Testificandum is a court order that requires a person to appear in court to testify in a legal proceeding.