Police - K9, Detection, Training (2024)

Dogs were first trained for police work at the turn of the 20th century in Ghent, Belg., and the practice was soon adopted elsewhere. Although certain breeds with especially keen senses have been used for special purposes—such as detecting caches of illegal drugs and explosives and tracking fugitives and missing persons—the most widely trained dog for regular patrol work is the German shepherd, or Alsatian. Other breeds that are sometimes used include boxers, Doberman pinschers, Airedale terriers, rottweilers, schnauzers, and bloodhounds. For detection tasks, the size of the animal is less important than its olfactory sensitivity. Selected animals must meet specific criteria regarding physical characteristics and temperament, and their training is comprehensive and rigorous.

Handguns, shotguns, and rifles

The first practical police firearm, the multishot revolver, was patented in 1835 by Samuel Colt. In the 1850s the British gun manufacturer Beaumont-Adams introduced the self-co*cking double-action revolver. In contrast with the Colt, which needed to be co*cked before firing, the double-action revolver could be fired by just a direct pull on the trigger. This allowed for quicker fire, at the expense of precisely aimed shots. In the United States and throughout the British Empire, the double-action revolver became, with few exceptions, the police sidearm of choice for more than a century.

Semiautomatic pistols were developed in Germany in the late 19th century by Peter Paul Mauser, whose Mauser rifle became a standard infantry weapon. In 1911 the .45-calibre single-action semiautomatic pistol developed by the American weapons designer John Browning was adopted by the U.S. military. Yet despite the advent of semiautomatics, double-action revolver pistols remained important police weapons not only for their capacity for quick firing; they also were perceived as more reliable than semiautomatics, whose firing mechanism tended to jam. In addition, double-action pistols were more secure than semiautomatics, as it took a significant amount of pressure on the trigger to fire them. Nevertheless, semiautomatics had more firing power and could be refilled with cartridges much more quickly through the use of magazines. In the 1970s, police departments in the United States began slowly to replace revolvers with semiautomatic pistols. The replacement of revolvers by semiautomatic firearms is now a worldwide police trend. Yet many plainclothes police officers all over the world still use a remodeled type of revolver with a very short barrel that makes it easier to carry.

In Western-style democracies, the standard police sidearm is strictly a defensive weapon. For offensive operations such as gunfights, more powerful firearms—e.g., shotguns and rifles—are necessary. Shotguns are capable of firing a variety of ammunition, including buckshot, slugs, tear gas, baton projectiles, and grenades. The pump-action shotgun, which was widely used in police departments from the early 20th century, began to be replaced by the semiautomatic shotgun in the late 20th and early 21st centuries.

The lever-action rifle accompanied the lawmen of the American West as they policed their jurisdictions in the 19th century. During the 20th century, police continued to use rifles of various descriptions and calibres. From the 1920s until World War II, some police departments in the United States adopted the Thompson submachine gun, or tommy gun, a weapon that was also embraced by the criminal underworld. The advent in the late 1960s of SWAT teams brought police countersniper units into service. Weapons used by such teams varied but typically included bolt-action high-calibre rifles fitted with telescopic sights.

Explosives

Explosives are used only sparingly by police, generally for breaching barricades and as distraction devices. Explosive “flash-bangs,” which generate a loud explosion and a brilliant flash that disorient suspects, are usually tossed by hand or launched from firearms. One variation of the flash-bang, used particularly for riot suppression, discharges multiple small rubber balls or baton projectiles. Other explosives can be used to deliver tear gas or aerosolized capsicum. Police also use sophisticated automated devices to handle explosives planted by terrorists or other criminals. Operated by police from a safe distance, the small tanklike vehicles with steel pincers can defuse or explode bombs after the public has been evacuated from the area.