Okla. Stat. tit. 22, § 22-15: Testimony against one's self - Restraint during trial and

prior to conviction.

No person can be compelled in a criminal action to be witness

against himself; nor can a person charged with a public offense be

subjected before conviction to any more restraint than is necessary

for his detention to answer the charge, and in no event shall he be

tried before a jury while in chains or shackles.