In NY, btwn 16 and 23 members requireing vote of 12 to indict, based on legally sufficient evidence that would be admissible at trial.
Non-adversarial proceeding, and defendant has no right to present or confront witnesses, or to introduce evidence.
Prosecutor advises grand jury of the law and assists in issuing subpoenas.
Witnesses have no right to counsel in grand jury room, but may leave proceeding to consult counsel.
Grand jury can hear evidence not admissible at trial.