Vancouver (/vænˈkuːvər/) is a coastal seaport city on the mainland of British Columbia, Canada. The 2011 census recorded more than 603,000 people in the city, making it the eighth largest among Canadian cities. The metropolitan area, with more than 2.3 million residents, is the third most populous metropolitan area in the country and the most populous in Western Canada. With 5,249 people per square kilometre (13,590 per sq mile), the City of Vancouver is the most densely populated Canadian municipality among those with 5,000 residents or more. Vancouver is one of the most ethnically and linguistically diverse cities in Canada, with 52% for whom English is not their first language.

The original settlement, named Gastown, grew around the Hastings Mill logging sawmill and a nearby tavern, both established in 1867. Enlarging to become the townsite of Granville, with the announcement that the railhead would reach the site it was renamed "Vancouver" and incorporated as a city in 1886. By 1887, the transcontinental railway was extended to the city to take advantage of its large natural seaport, which soon became a vital link in a trade route between the Orient, Eastern Canada, and London. As of 2009, Port Metro Vancouver is the busiest and largest port in Canada, and the most diversified port in North America. While forestry remains its largest industry, Vancouver is well known as an urban centre surrounded by nature, making tourism its second-largest industry. Major film production studios in Vancouver and Burnaby have turned Metro Vancouver into the third-largest film production centre in North America after Los Angeles and New York City, earning it the film industry nickname, Hollywood North.

Canada ( /ˈkænədə/) is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean. Spanning over 9,900,000 km² (3,800,000 sq mi), Canada is the world's second-largest country by total area, and its common border with the United States is the longest land border in the world.

The land that is now Canada has been inhabited for millennia by various Aboriginal peoples. Beginning in the late 15th century, British and French colonial expeditions explored, and later settled, along the region's Atlantic coast. France ceded nearly all of its colonies in North America in 1763 after the Seven Years' War. In 1867, with the union of three British North American colonies through Confederation, Canada was formed as a federal dominion of four provinces. This began an accretion of provinces and territories and a process of increasing autonomy; the Canada Act 1982 severed the vestiges of legal dependence on Britain.

A police officer (also known as a policeman or policewoman, and constable in some forces, particularly in the United Kingdom and other Commonwealth nations) is a warranted employee of a police force. In the United States, "officer" is the formal name of the lowest police rank; in many other countries "officer" is a generic term not specifying a particular rank, and the lowest rank is often "constable". Police officers are generally charged with the apprehension of criminals and the prevention and detection of crime, and the maintenance of public order. Police officers may be sworn to an oath, and have the power to arrest people and detain them for a limited time, along with other duties and powers.

Some police officers may also be trained in special duties, such as counter-terrorism, surveillance, child protection, VIP protection, and investigation techniques into major crime, including fraud, rape, murder and drug trafficking.

Responsibilities of a police officer are varied, and may differ greatly from within one political context to another. Typical duties relate to keeping the peace, law enforcement, protection of people and property, and the investigation of crimes. Officers are expected to respond to a variety of situations that may arise while they are on duty. Rules and guidelines dictate how an officer should behave within the community, and in many contexts restrictions are placed on what the uniformed officer wears. In some countries, rules and procedures dictate that a police officer is obliged to intervene in a criminal incident, even if they are off-duty. Police officers in nearly all countries retain their lawful powers, while off duty.