Okla. Stat. tit. 22, § 22-493: Indictment or information set aside, when

The indictment or information must be set aside by the court, in

which the defendant is arraigned, and upon his motion in any of the

following cases:

1. When it is not found, endorsed, presented or filed, as

prescribed by the statutes or when the grand jury is not drawn and

impaneled as provided by law, and that fact is known to the

defendant at or before the time the jury is sworn to try the cause:

Provided, that the defendant shall be conclusively presumed to know

matters of record.

2. When the names of the witnesses examined before the grand

jury are not made to appear on some part of the indictment, as

provided in this chapter.

3. When a person is permitted to be present during the session

of a grand jury while the vote on the finding of the indictment is

being taken, or when it is shown that after the grand jury was first

impaneled any member or members thereof, were discharged and their

places filled by persons not regularly drawn from the jury list, as

provided by law, and that they were admitted into the grand jury or

took part in their deliberations, or that the grand jury was not

impaneled anew as a whole body in open court.