High Quality Content by WIKIPEDIA articles! The Tennessee Bureau of Investigation, or TBI is the criminal investigative arm of the state government of Tennessee. It was established by the Tennessee General Assembly on March 27, 1980, as an independent state agency. The TBI manages the state's three crime labs, assists local law enforcement in investigating major crimes, and conducts special investigations related to illegal drugs, fugitives, public corruption, official misconduct, organized crime,... Mehr