The Federation Grand Jury was a body of Federation citizens selected and sworn in by a judge or other judicial official, typically in association with a criminal investigation. In 2373, the Federation Grand Jury convened on Inferna Prime for an inquiry concerning the Orion Syndicate. Quark was expected to testify to them against the Syndicate. (DS9: "The Ascent") As very little is known about the Federation's civilian legal system, the information provided is based on the assumption that the Federation Grand Jury served in the same manner as grand juries in the United States of America.