In the early 21st century, terrorism, particularly the September 11 attacks in the United States, profoundly affected the nature of policing. Although police had been combating terrorism long before 2001, the magnitude of the September 11 attacks and of subsequent acts of terrorism in other countries (including Spain, Britain, Morocco, and Egypt) showed that conventional tactics were no longer adequate. Police departments would have to work more closely with national security agencies, and many police resources would have to be redirected toward the surveillance of suspected terrorists.

From about 1960 to about 1980, police in Europe confronted a wave of terrorism that swept over several countries. Although some of the organizations involved are still active—for example, the Basque ETA in Spain—police eliminated most of them, such as the Front de Libération du Québec in Canada, the Red Army Faction in what was then West Germany, and the Red Brigades in Italy. (The remnants of the Red Brigades splintered into two factions: the New Red Brigades/Communist Combatant Party and the Red Brigades/Union of Combatant Communists. Although occasionally active, these splinter groups have too little in common with the original Red Brigades to be considered their heirs.) The police owed their success mostly to their ability to infiltrate the terrorist networks with human sources, who then cultivated informants. To a large extent, police used the same methods against terrorism that they had successfully used in certain countries against organized crime, with some significant exceptions. They were at times granted emergency powers that allowed them to detain suspects for longer periods for questioning. Some states also instituted policies against terrorist sympathizers, such as the Berufsverbot (“work ban”) in West Germany, which prohibited a person identified as a sympathizer from working in government service. (The Berufsverbot is still used in Germany today.) Police operatives also resorted to various dirty tricks (e.g., break-ins, intimidation, the publication of fake terrorist communiqués, the spread of false and destructive rumors about individuals, and entrapment), euphemistically called “destabilization tactics,” that were of questionable legality. (Those abuses were investigated and made public by various commissions of inquiry.)

After the September 11 attacks, it was recognized that the changed nature of terrorism would require corresponding changes in counterterrorism tactics. First, terrorism was more difficult to combat. Because terrorism had become truly global, the languages and customs of terrorists often differed from those of local police, making infiltration more difficult. Moreover, although the community-policing movement had enabled police to develop closer ties to the communities they served, it also sometimes created feelings of allegiance that discouraged police from sharing knowledge of their communities with intelligence agencies. Second, the scale of devastation caused by terrorist attacks like those of September 11 made them seem more like acts of war than crimes. Especially in the United States, the perception of terrorism as a military as well as a law enforcement problem only complicated the task of developing effective policing strategies against terrorists.

Cooperation between law enforcement agencies and national-security and intelligence agencies in investigations of terrorism also has been hampered by institutional factors of longer standing. Police investigators and intelligence collectors often do not share common goals: investigators aim at prosecuting an offender, whereas intelligence officers hoard intelligence until they can wipe out whole terrorist networks. The so-called “wall” between law enforcement agencies, such as the FBI, and the intelligence community is no myth. The sharing of information is made even more difficult by the fact that members of local law enforcement agencies, whose contribution may be vital, may not possess the level of security clearance necessary for access to sensitive intelligence. Such problems are only magnified when the law enforcement and intelligence agencies involved are located in different countries.

The surveillance and arrest of terrorist suspects require significant police manpower and resources, as does preparation for future terrorist attacks. As a result, some observers fear that the reform programs instituted since the 1980s will be underfunded and will grind to a halt.

Centralized police organizations

Western continental Europe favors the centralized model of policing, as do Russia and other eastern European countries. However, there is considerable variation among the centralized police organizations of western European countries. Most fall under one of four categories: (1) complete centralization in one police force; (2) high centralization, with a small number of national police forces; (3) regional centralization under federal authority; and (4) decentralized local policing, with a strong national agency. Other commonalities among European police systems are a strong domestic security arm that is integrated partly or wholly into the police apparatus and unarmed municipal police forces that enforce various local bylaws and regulate traffic.

Sweden is an example of a country with a completely centralized police force: it has only one national police force, the Rikspolis. It comprises a number of police authorities, each of which is responsible for policing one of the counties of the country. The counties are further subdivided into police districts, of which there are several hundred.

France, Italy, and Spain exemplify the model of high centralization with a small number of national police forces. There are two national police agencies in France: the National Police and the Gendarmerie Nationale. The National Police operates in cities, whereas the Gendarmerie Nationale polices rural areas and small towns. A third force, the State Security Police (French: Compagnies Républicaines de Sécurité), is a part of the National Police but is organized like a military unit. Italy’s national police agencies include the State Police, which is responsible for public order and security; the Carabinieri, which functions both as a military police force and as a civil police force; and the Financial Police, or Treasury Guard, which deals with economic crimes such as tax evasion and counterfeiting. Spain’s police system consists of two national police agencies: the National Police, which is responsible for most police duties, and the Civil Guard, which is a militarized force that patrols rural areas and also specializes in the protection of national security (counterterrorism) and crowd control.

Germany and The Netherlands typify regional centralization under federal authority. Germany has two federal police forces: the Federal Criminal Police Office, whose role is similar to that of the FBI in the United States, and the Federal Border Guard. However, the basic policing structure rests on the state or province police forces, which are similarly structured. In The Netherlands, the National Police Agency operates under the authority of the Ministry of the Interior, but the regional police forces provide the backbone of the policing system. There is also a military police force, the Royal Dutch Constabulary (Dutch: Koninklijke Marechaussee), which operates in rural areas and polices the Dutch borders.

The Belgian police system features a federal police force, which brought together the former gendarmerie and the national criminal investigation unit, and numerous local police forces, each of which is responsible to a mayor. Belgium’s system of policing is closer to an Anglo-American decentralized model than the other European centralized models.

The police forces in Russia and the former Soviet-bloc countries of eastern Europe entered a state of transition after the collapse of the Soviet Union in 1991. The Soviet Union was policed by a single centralized police force, the Militia, that operated in the various territorial divisions of the country under the rigid authority of the Ministry of the Interior (MVD). After the former Soviet republics gained independence, many of the constituent parts of the Militia also became fully independent, while other parts remained in the Russian Federation. The police forces within the states of the Russian Federation enjoy some independence from the federal government. Although much of the centralized police apparatus of the former Soviet Union is still in place, it is weaker; similar institutions in the former Soviet-bloc countries also have been weakened to varying degrees.