In Re Grand Jury Proceedings, Doe

Agents of the federal government, in the course of conducting court-authorized electronic surveillance during a criminal investigation, intercepted communications which involved the appellant. The appellant later was called to testify before a federal grand jury sitting in the District of Massachusetts. He refused to do so, citing his Fifth Amendment privilege against self-incrimination. The government applied for and received a court order directing the appellant to testify and prohibiting the government from using his testimony or its fruits against him in a criminal prosecution. The…