Okla. Stat. tit. 22, § 22-782: Nonresident witness - Application for commission to take

testimony.

When a material witness for the defendant resides out of the

state the defendant may apply for an order that the witness be

examined on a commission to be issued under the seal of the court,

and the signature of the clerk, directed to some party designated as

commissioner, authorizing him to examine the witness upon oath or

interrogatories annexed thereto, and to take and certify the

deposition of the witness and return it according to the

instructions given with the commission.