The Law Enforcement Support Unit (LESU) is responsible for matters related to the Tennessee Information Enforcement System (TIES). TIES is the network that allows local, state and federal law enforcement officials to access computerized interstate and intrastate communication systems.
These systems include the TBI’s Tennessee Criminal History Repository, information contained in Tennessee Department of Safety's databases, Tennessee Department of Revenue's databases, the FBI’s National Crime Information Center (NCIC) and the National Law Enforcement Telecommunication System (NLETS).
The Information Systems Division is responsible for providing criminal justice and law enforcement agencies within Tennessee access to the Tennessee Criminal History Repository and NCIC. This is communicated using the TIES network. Interstate access at the local, state and federal level is communicated using the International Justice and Public Safety Information Sharing Network.
Information Systems Division personnel provide the administrative, managerial, and technical liaison service for more than 350 agencies that comprise the TIES network. Currently, there are more than 8,000 terminals, mobile units, and hand-held devices in the state access the TIES network. The TIES Network Operations Center has employees in place who work 12 ½ -hour shifts to monitor performance of the TIES network. The employees also assume the emergency communications responsibilities within the TBI after hours and on weekends.