Okla. Stat. tit. 22, § 22-701: Defendant a competent witness - Comment on failure to

testify - Presumption.

In the trial of all indictments, informations, complaints and

other proceedings against persons charged with the commission of a

crime, offense or misdemeanor before any court or committing

magistrate in this state, the person charged shall at his own

request, but not otherwise, be a competent witness, and his failure

to make such request shall not create any presumption against him

nor be mentioned on the trial; if commented upon by counsel it shall

be ground for a new trial.