The United States Park Police (USPP) is the oldest uniformed federal law enforcement agencies in the United States. It functions as a full-service law enforcement agency with responsibilities and jurisdiction in those National Park Service areas primarily located in the Washington, D.C., San Francisco, and New York City areas and certain other government lands. United States Park Police officers have jurisdictional authority in the surrounding metropolitan areas of the three cities it primarily operates in, meaning they possess both state and federal authority. In addition to performing the normal crime prevention, investigation, and apprehension functions of an urban police force, the Park Police are responsible for policing many of the famous monuments in the United States.
The California Highway Patrol (CHP) is a state law enforcement agency of the U.S. state of California. The CHP has primary patrol jurisdiction over all California highways and roads and streets outside city limits, and can exercise law enforcement powers anywhere within the state. The California Highway Patrol can assist local and county agencies and can patrol major city streets along with local and county law enforcement, state and interstate highways, and is the primary law enforcement agency in rural parts of the state.
State Route 74, part of which forms the Palms to Pines Scenic Byway or Pines to Palms Highway, and the Ortega Highway, is a state highway in the U.S. state of California. It runs from Interstate 5 in San Juan Capistrano in Orange County to the city limits of Palm Desert in Riverside County. Stretching about 111 miles (179 km), it passes through several parks and National Forests between the Pacific coast and the Coachella Valley.
The BART Police (BARTPD), officially the Bay Area Rapid Transit Police Department, is the transit police agency of the BART rail system in the U.S. state of California. The department has approximately three hundred police personnel, including over two hundred sworn peace officers. The chief, Ed Alvarez commands the agency's law enforcement, parking, and community relations services. BART Police participates in a mutual aid agreement with other Bay Area law enforcement agencies. In 2011 and 2012 the department came under national scrutiny due to several officers involved in fatalities of the rail system's patrons.
The Las Vegas Metropolitan Police Department is a combined city and county law enforcement agency for the City of Las Vegas and Clark County, Nevada, United States. It is headed by the Sheriff of Clark County, who is publicly elected every four years. The sheriff is the only elected head law enforcement officer within the county, and, as such, the department is not under the direct control of its jurisdictional cities, Clark County, or the State of Nevada.
Law enforcement is one of three major components of the criminal justice system of the United States, along with courts and corrections. Although each component operates semi-independently, the three collectively form a chain leading from an investigation of suspected criminal activity to the administration of criminal punishment.
The Nevada State Police (NSP), also known as the Nevada Department of Public Safety (DPS) from roughly 1949 to 2021, is the state police and highway patrol agency of Nevada, with state-wide jurisdiction. The Nevada State Police also encompass the Division of Parole and Probation, the Capitol Police Division, the Division of Investigations, the Office of Professional Responsibility, the Fire Marshall Division and the Records, Compliance and Communications Division as well as various other smaller entities.
The Miami-Dade Police Department (MDPD), formerly known as the Metro-Dade Police Department (1981–1997), Dade County Public Safety Department (1957–1981), and the Dade County Sheriff's Office (1836–1957), is a county police department serving Miami-Dade County. The MDPD has approximately 4,700 employees, making it the largest police department in the southeastern United States and the eighth largest in the country. The department is still often referred by its former name, the Metro-Dade Police or simply Metro.
The Texas Highway Patrol is a division of the Texas Department of Public Safety and is the largest state-level law enforcement agency in the U.S. state of Texas. The patrol's primary duties are enforcement of state traffic laws and commercial vehicle regulation, but it is a fully empowered police agency with authority to enforce criminal law anywhere in the state. Highway patrol troopers are also responsible for patrolling the state Capitol Complex in Austin and providing security to the governor. The current Chief is Lieutenant Colonel Dwight Mathis.
The Ventura County Sheriff's Office (VCSO), also sometimes known as the Ventura County Sheriff's Department (VCSD), provides law enforcement for the unincorporated areas of Ventura County, California, as well as several cities within the county. The cities that Ventura County Sheriff's Office provides police services for are Camarillo, Fillmore, Moorpark, Ojai, and Thousand Oaks.
The Riverside County Sheriff's Department (RSD), also known as the Riverside Sheriff's Office (RSO), is a law enforcement agency in Riverside County, in the U.S. state of California. Overseen by an elected sheriff-coroner, the department serves unincorporated areas of Riverside County as well as some of the incorporated cities in the county by contract. 17 of the county's 26 cities, with populations ranging from 4,958 to 193,365, contract with the department for police services. The county hospital and one tribal community also contract with the department for proactive policing. Riverside County is home to 12 federally recognized Indian reservations. Absent proactive policing and traffic enforcement, the department is responsible for enforcing criminal law on all Native American tribal land within the county. This function is mandated by Public Law 280, enacted in 1953, which transferred the responsibility of criminal law enforcement on tribal land from the federal government to specified state governments including California. The department also operates the county's jail system.
The Sacramento Police Department (SPD) is the municipal law enforcement agency of the city of Sacramento, California. On August 11, 2017, Daniel Hahn was sworn in and became the city's first African American police chief.
The Alexandria Police Department (APD) is the primary law enforcement agency servicing 155,810 people within 15.4 square miles (40 km2) of jurisdiction within Alexandria, Virginia. The APD has been internationally accredited by the Commission on Accreditation for Law Enforcement Agencies (CALEA) since 1986, and was re-accredited in 1991, 1996, 2001, 2004, 2007, 2010, 2013, and 2016. The APD has 315 sworn officers and 152 civilian employees. New officers are trained at the Northern Virginia Criminal Justice Training Academy.
In the United States, the state police is a police body unique to each U.S. state, having statewide authority to conduct law enforcement activities and criminal investigations. In general, state police officers or highway patrol officers, known as state troopers, perform functions that do not fall within the jurisdiction of the county sheriff, such as enforcing traffic laws on state highways and interstate expressways, overseeing the security of the state capitol complex, protecting the governor, training new officers for local police forces too small to operate an academy and providing technological and scientific services. They support local police and help to coordinate multi-jurisdictional task force activity in serious or complicated cases in those states that grant full police powers statewide.
The Omaha Police Department (OPD) is the principal law enforcement agency of the city of Omaha, Nebraska, United States. It is nationally accredited by the Commission on Accreditation for Law Enforcement Agencies. The OPD is the largest law enforcement agency in the state of Nebraska.
