In the Matter of a John Doe Grand Jury Investigation

We deal with questions reported by a Superior Court judge arising out of the refusal of a witness, purportedly immunized by a single justice of this court, to testify before a Middlesex County grand jury. See G. L. c. 233, §§ 20C-20H (1986 ed.).

The questions come to us on a statement of agreed facts which we summarize. The witness, who was summoned before a grand jury that was investigating alleged violations of the conflict of interest and extortion statutes, validly claimed his privilege against self-incrimination. On application of the Attorney General, a single justice of this court…