Oregon Revised Statutes Procedure in Criminal Matters Generally § 136.608

(a) An indictment has been filed, and is pending, against the defendant in a circuit court;

(b) A grand jury proceeding has been commenced against the defendant; or

(c) A complainant's information or a district attorney's information alleging that the defendant has committed a felony has been filed, and is pending, in a court of competent jurisdiction.

(a) Possesses information material to the determination of the action against the defendant; and

(b) Will not appear at the time when attendance of the witness is required.

(a) If an indictment has been filed, a grand jury proceeding has been commenced or the defendant has been held to answer by any court to await the action of a grand jury, in the circuit court in which the indictment is pending or by which the grand jury has been impaneled; or

(b) If information alleging the commission of a felony is pending in a court authorized to hold a preliminary hearing, in that court or in the circuit court that would have jurisdiction of the case upon holding the defendant to answer to await the action of the grand jury.