Law enforcement in Mexico
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Law enforcement in Mexico is divided between federal, state, and municipal entities. There are two federal police forces, 31 state police forces (and two for the federal district) and one estimate suggests over 1,600 municipal police forces. There are 366 officers per 100,000 people, which equals approximately 500,000 in total, but systemic corruption is endemic and police forces are often poorly trained and underpaid. The average wage of a police officer is $350 per month, around that of a builder's labourer, which means that many police officers supplement their salaries with bribes. As of 2012, Mexico has a police force of over 544,000 elements, making it the country with the third largest police force in the world, just behind India and the United States.
The government has found it hard to provide police forces with sufficient pay and protection to make it worthwhile resisting the threats and blandishments of drug traffickers, though recent efforts to reform the federal police saw a tenth of the 30,000+ officers fired in the first eight months of 2010. There has been a tendency to increase the militarization of policing. In 2006, 45,000 troops of the Mexican Army were deployed to fight drugs cartels, with the number rising to 50,000 by October 2010. In Monterrey, police, soldiers and prosecutors have conducted joint patrols, which have seen violence reduced.
At all levels, policing in Mexico tends to maintain separate forces for patrol/response (preventive) policing on the one hand and investigative (judicial) policing on the other.
Mexico maintains two primary Federal Police agencies; the Policia Federal, the uniformed force, and an Investigative force called the Policía Federal Ministerial. They are sometimes referred to by the slang term "Federales."
Federal Police 
The Federal Police (Policía Federal, PF), is the most prominent police force in Mexico. Under the guidance of the Secretariat of Public Security (SSP), the PF is nominally a "preventive" police force but with significant powers of investigation to prevent crime.
The PF replaced the Federal Preventive Police, which was created in 1999 combining several police forces into one, but lacking any investigative powers. When the PF was created a large number of investigators from the Federal Investigations Agency (AFI) were transferred and the AFI was replaced by the Ministerial Federal Police.
Ministerial Federal Police 
The PFM replaced the earlier Federal Investigations Agency (Agencia Federal de Investigación, AFI) after much of its force was transferred to the new Federal Police (PF). The Federal Investigations Agency itself had replaced the notoriously corrupt Federal Judicial Police (Policía Judicial Federal, PJF) by the presidential decree of former President Vicente Fox on November 1, 2001. In May 2008, the previous acting chief of the AFI, Édgar Eusebio Millán Gómez, was assassinated.
Federal District Police 
The Secretariat of Public Security of the Federal District (Secretaría de Seguridad Pública del Distrito Federal – SSP), unlike the previous two, does not have national reach, but it does manage a combined force of over 90,000 officers in the Federal District (DF). The SSP is charged with maintaining public order and safety in the center of Mexico City.
The investigative Judicial Police of the Federal District (Policía Judicial del Distrito Federal – PJDF), are organized under the Office of the Attorney General of the DF (the Procuraduría General de Justicia del Distrito Federal). The PGJDF maintains 16 precincts (delegaciones) with an estimated 3,500 judicial police, 1,100 investigating agents for prosecuting attorneys (agentes del ministerio público), and 941 experts or specialists (peritos).
The principal police force of Mexico City is the Protection and Transit Directorate, also known as the Traffic Police, which consists of some 32,000 officers organized into thirty-three precincts. It is the largest single law enforcement organization in Mexico.
The Bank and Industrial Police of the Ministry of Public Security of the Federal District provides specialized services for the protection, custody and supervision, not just banks and lending institutions, but also dependencies, institutions and government bodies, federal and local, as well as individuals and corporations that require it, with the arrangements put in place.
Mexico City has the second highest crime rate in Latin America. More than 100 serious crimes are reported each day in Mexico City, and on average in the Federal District in the first quarter of 1997 one police officer was killed and one injured weekly. A sense of insecurity prevails among many citizens because of the lack of confidence in the police and the fear of police misbehavior and crime.
The Secretariat of Government (Secretaría de Gobernación), has Immigration officers who directed by the Mexican Immigration Service, these officers have the right to detain suspected undocumented aliens and, under certain conditions, may deport them without formal deportation proceedings.
The Secretariat of Finance and Public Credit (Secretaría de Hacienda y Crédito Público, Crédito) Customs officers are deployed at borders and at international airports to interdict contraband entering Mexico.
The Bank of Mexico (Banco de México) also operates its own security division, which is charged with enforcing banking and monetary laws, including cases of counterfeiting, fraud, and money laundering.
State Police 
Each of the country's thirty-one states maintain both preventive and judicial police called the State Judicial Police. State police are under the direction of the state's governor. The distinction between crimes investigated by State and Federal Judicial Police is not always clear. Most offenses come under the state authorities. Drug dealing, crimes against the government, and offenses involving several jurisdictions are the responsibility of the federal police. The state-level preventive police forces are together perhaps 90,000-strong, and the state-level judicial police perhaps 25,000-strong.
State police forces operate from precinct stations, called delegaciones with each delegación has an average of 200 police officers attached to it. The ranking officer is known as a comandante, equivalent to a first captain in the military. Most of the remaining personnel hold the ranks of first sergeant, second sergeant, and corporal.
Some of the municipalities of Mexico have their own preventive and municipal police forces, which are responsible for handling minor civil disturbances and traffic infractions. Of the 2,395 municipalities, 335 have no police forces. However, some of the municipal forces are large and important.
There have historically been multiple government departments with varying levels of responsibility for law enforcement, a situation criticised by experts who suggest that all their functions should be merged into the Public Security Ministry.
Since 2007, all senior police officers from state and federal forces must complete a common year-long training program. However, training at lower levels remains poor. In some municipalities of Chihuahua, the municipal police have received training from Mexican Army advisors.
Private security 
Mexican security companies have grown significantly in recent years, in response to the state’s failure to provide security. Mexico holds third place world-wide in the purchase of security equipment. Between 1998 and 1999, private security companies increased some 40 percent. The Mexican government has had serious problems in regulating these companies, most of which are illegitimate since they lack the necessary legal permits. It was estimated in 1999, that about 10,000 private security firms operated in Mexico, yet only 2,000 had some form of official permit.
According to official figures in December 2000, there were 2,984 private security companies registered with 153,885 employees. The inability to regulate or control these forces creates potential security problem. Since many of these companies are unregulated, some will engage in criminality instead of (or as a means of) protecting their clients, thus exacerbating the problem of insecurity. According to a study by the Mexico City legislative assembly, in 1998 there were more private security guards than police. A substantial number of private security guards were formerly police officers or presently work as security guards while off-duty; these dynamics increase the likelihood of police corruption.
See also 
- "On the trail of the traffickers". The Economist. 2009-03-05. Retrieved 2009-03-07.
- "Under the volcano". The Economist. 14 October 2010. Retrieved 18 October 2010.
- Emmott, Robin (2007-05-22). "Police corruption undermines Mexico's war on drugs". Reuters (The Boston Globe). Archived from the original on 2008-05-30. Retrieved 2008-02-05.
- (Spanish) "México, tercer país con mayor fuerza policial". Milenio. 26 March 2012. Retrieved 27 March 2012.
- Méndez, Alfredo (2009-11-12), "Ratifican a Nicandra Castro en la PFM", La Jornada (in Spanish)
- Torres, Ruben (2009-11-11), "Ratifican a Nicandra Castro", El Economista (in Spanish)