Okla. Stat. tit. 74 § 150.21b
Notwithstanding any other provisions of law, when the Commissioner of Public Safety has requested the Oklahoma State Bureau of Investigation to conduct a criminal investigation of any incident involving the use of deadly force by a commissioned officer of the Department of Public Safety while in the official performance of such officer's duties, the Commissioner may use the report and the investigative information and materials in the furtherance of administrative matters within the Department, including, but not limited to, taking personnel actions and conducting internal investigations. Under no circumstances shall an OSBI report of its investigation of any incident involving the use of deadly force by a commissioned officer of any law enforcement agency other than the Department of Public Safety be provided to the employing agency for the purpose of or be used by that agency for the purpose of administrative matters or any purpose other than criminal prosecution.
Okla. Stat. tit. 74, § 150.21b