New York Laws
Article 620 - Securing Attendance of Witnesses by Material Witness Order
620.20 - Material Witness Order; When Authorized; by What Courts Issuable; Duration Thereof.

(a) Possesses information material to the determination of such
action; and
(b) Will not be amenable or responsive to a subpoena at a time when
his attendance will be sought.
2. A material witness order may be issued only when:
(a) An indictment has been filed in a superior court and is currently
pending therein; or
(b) A grand jury proceeding has been commenced and is currently
pending; or
(c) A felony complaint has been filed with a local criminal court and
is currently pending therein.
3. The following courts may issue material witness orders under the
indicated circumstances:
(a) When an indictment has been filed, or a grand jury proceeding has
been commenced, or a defendant has been held by a local criminal court
for the action of a grand jury, a material witness order may be issued
only by the superior court in which such indictment is pending or by
which such grand jury has been or is to be impaneled;
(b) When a felony complaint is currently pending in a district court
or in the New York City criminal court or before a superior court judge
sitting as a local criminal court, a material witness order may be
issued either by such court or by the superior court which would have
jurisdiction of the case upon a holding of the defendant for the action
of the grand jury;
(c) When a felony complaint is currently pending in a city court or a
town court or a village court, a material witness order may be issued
only by the superior court which would have jurisdiction of the case
upon a holding of the defendant for the action of the grand jury.
4. Unless vacated pursuant to section 620.60, a material witness
order remains in effect during the following periods of time under the
indicated circumstances:
(a) An order issued by a superior court under the circumstances
prescribed in paragraph (a) of subdivision three remains in effect
during the pendency of the criminal action in such superior court;
(b) An order issued by a district court or the New York City criminal
court or a superior court judge sitting as a local criminal court, under
circumstances prescribed in paragraph (b) of subdivision three, remains
in effect (i) until the disposition of the felony complaint pending in
such court, and (ii) if the defendant is held for the action of a grand
jury, during the pendency of the grand jury proceeding, and (iii) if an
indictment results, for a period of ten days following the filing of
such indictment, and (iv) if within such ten day period such order is
indorsed by the superior court in which the indictment is pending,
during the pendency of the action in such superior court. Upon such
indorsement, the order is deemed to be that of the superior court.
(c) An order issued by a superior court under circumstances
prescribed in paragraph (c) of subdivision three remains in effect (i)
until the disposition of the felony complaint pending in the city, town
or village court, and (ii) if the defendant is held for the action of
the grand jury, during the pendency of the action in the superior court.