four associate justices. No more than two justices can be from the same Grand Division. The Supreme Court of Tennessee appoints the state's Attorney General, a practice only found in Tennessee. Both the Court of Appeals and the Court of Criminal Appeals have 12 judges, who are evenly from each Grand Division. Under the Tennessee Plan, the governor appoints justices on all three courts to eight-year terms; they must be retained by the voters during the first general election after appointment and at the end of their term. Tennessee is divided into 31 judicial districts, each with a circuit and chancery court, and a district attorney and judges elected to eight-year terms. Separate criminal courts serve 13 of the 31 judicial districts; circuit courts handle criminal cases in the remaining districts. Local courts include general sessions, juvenile and domestic, and municipal courts. Tennessee maintains four dedicated law enforcement agencies: the Tennessee Highway Patrol (THP), the Tennessee Wildlife Resources Agency (TWRA), the Tennessee Bureau of Investigation (TBI), and the Tennessee Department of Environment and Conservation (TDEC). The Highway Patrol is the primary entity that enforces highway safety regulations and general non-wildlife state laws. It is under the jurisdiction of the Department of Safety. The TWRA is an independent agency tasked with enforcing all wildlife, boating, and fishery regulations outside of state parks. TDEC enforces state environmental laws and regulations. The TBI is the primary state-level criminal investigative department. State park rangers are responsible for all activities and law enforcement inside the Tennessee State Parks system. Capital punishment is legal in Tennessee and has existed at various times since statehood. Lethal injection is the primary means of execution, but electrocution is also allowed. Local Tennessee is divided into 95 counties, with 92 county governments that use a county commission legislative body and a separately elected county executive. The governments of Davidson (Nashville), Moore (Lynchburg), and Trousdale (Hartsville) are consolidated with their county seats. Each county elects a sheriff, property assessor, trustee, register of deeds, and county clerk. Tennessee has more than 340 municipalities. Most cities and towns use the weak mayor-council (mayor-aldermen), strong-mayor council, city commission, or council–manager forms of government. Local law enforcement is divided between county sheriff's offices and municipal police departments. In every county except Davidson, the sheriff is the chief law enforcement officer. Federal Tennessee sends nine representatives to the United States House of Representatives. The current delegation