The OSBI assists the county sheriff offices and city police departments of the state , and is the primary investigative agency of the state government .
The Oklahoma State Bureau of Investigation ( OSBI ) is an independent state law enforcement agency of the government of Oklahoma .
The state law enforcement agency assists the county sheriff offices and city police departments of the state , and is the primary investigative agency of the state government .
The Oklahoma State Bureau of Investigation ( OSBI ) is an independent state law enforcement agency of the government of Oklahoma .