Okla. Stat. tit. 22, § 22-653: When challenge taken

It must be taken when the jury is full, and as soon as one

person is removed by challenge, another must be put in his place,

until the challenges are exhausted or waived. The court for good

cause shown may permit a juror to be challenged after he is sworn to

try the cause, but not after the testimony has been partially heard.