Los Zetas
Los Zetas took its name from a radio call sign. Z1 belonged to Arturo Guzmán Decena, the group's first commander, who had carried that code in the Federal Judicial Police, where it was given to high-ranking officers. In Spanish the name simply means The Zs. From that single letter grew a Mexican criminal syndicate now officially designated a terrorist organization. It is also now a fractured remnant of what it once was. How did a handful of soldiers who walked away from the army become hired guns for a drug cartel? Why did their methods spread to the very enemies they terrorized? And what brought down a group that, at its peak, held more ground than any other cartel in the country? The answers begin in the borderlands of Tamaulipas, directly across from Laredo, Texas.
Rolando Lopez Salinas was the rival who set everything in motion. Osiel Cárdenas Guillén had taken control of the Gulf Cartel in 1997, and he was soon fighting a violent turf war. He asked Arturo Guzmán Decena to recruit twenty men to kill that rival. Decena had deserted the Mexican Army in 1997 and began working for Cárdenas in 1999. Together with Heriberto Lazcano, he eventually persuaded 34 operators from the Grupo Aeromóvil de Fuerzas Especiales, known as GAFE, to leave the army. GAFE was an elite special forces unit. The first 14 recruits became known as the Group of 14, or Los 14. Some of these men reportedly received commando and urban warfare training from Israeli and American special forces.
The roster read like a cross-section of the army. It included a member of an armored unit, a communications officer, a logistics officer and a soldier from the Presidential Guard. Once Cárdenas had secured his power, he widened their duties. They organized kidnappings, ran protection rackets and extorted businesses. They also secured cocaine supply and the trafficking routes called plazas, and they executed the cartel's enemies. The Sinaloa Cartel answered by creating its own enforcer group, Los Negros. It was similar in design but less complex and less successful.
The ranks soon grew beyond deserters. Members came to include corrupt federal, state and local police, former US Army personnel, and ex-Kaibiles, the special forces of the Guatemalan military. In September 2005, Defense Secretary Clemente Vega told the Mexican Congress that the Zetas had hired at least 30 former Kaibiles to train recruits. Fewer ex-Mexican special forces men remained in the ranks. Their training camps were reported to resemble GAFE facilities, and some members carried a Los Zetas Commando Medallion for service. A female unit called the Panteras, or panthers, used seduction to negotiate with military, police and political figures. Its first leader, Ashly Narro López, known as La Comandante Bombón, was captured in 2009 in connection with the murder of General Tello Quiñones.
The founders did not last. Decena was killed in a military action at a restaurant in Matamoros in November 2002, and Lazcano, known as Z3, took over. Cárdenas was arrested in March 2003 and extradited in 2007, and with him gone the enforcers stepped into leadership.
Flaying, castration and the public display of bodies were practices that spread through Mexican organized crime after the Zetas arrived. The group did not rely on buying alliances the way older cartels did. It was new, and it competed with established rivals by using cruelty as psychological warfare. Victims were tortured, bodies were strung up in public, and killing was often indiscriminate.
The Zetas also preferred to seize territory the way an army would. They held ground by force and exploited every criminal opportunity it offered, from drug routes to extortion. Their military discipline faded as the original members were killed or arrested and younger men replaced them. The brutality, however, did not fade.
Other groups watched and adapted. Cartels struggling against the Zetas began adopting some of the same tactics to survive. The result was that violence in Mexico rose to higher levels and took new forms. The same enforcers who had been built to serve the Gulf Cartel were about to outgrow their employer.
By 2010, the Zetas outnumbered and outclassed the Gulf Cartel in revenue, membership and influence. The cartel tried to rein in its own enforcers, and that attempt ended in civil war. Banners appeared in Matamoros and Reynosa accusing the Zetas of murder, theft, extortion and kidnapping. The Zetas hung their own banners across Tamaulipas. They said they had carried out executions and kidnappings on the cartel's orders, and that they had been created for exactly that purpose. They also charged that the cartel was blaming them for the deaths of innocent civilians.
Reports disagree about who caused the formal split. One account says that a brother of Cárdenas, identified as Guillén, was addicted to gambling, sex and drugs, and the Zetas saw his leadership as a threat. Another points to a dispute over who would run the cartel after the extradition of Cárdenas. The cartel's candidates were Guillén and Jorge Eduardo Costilla Sánchez, while the Zetas wanted their own leader, Lazcano. The cartel was also reportedly seeking a truce with the Sinaloa Cartel, which the Zetas refused to recognize. A killing in Reynosa sharpened the quarrel. Samuel Flores Borrego, a cartel lieutenant, shot Sergio Peña Mendoza, a Zetas lieutenant known as El Concorde 3, over a drug corridor both men protected. The Zetas demanded the killer, and the cartel refused.
The Gulf Cartel then joined forces with its old rivals, the Sinaloa Cartel and La Familia Michoacana. The Zetas allied with the Beltrán-Leyva Cartel, the Juárez Cartel and the Tijuana Cartel. Signs of the break had appeared in September 2009. On the 24th of February 2010, gunmen in hundreds of trucks marked with the cartel's insignia clashed with Zetas gunmen in northern Tamaulipas. The fighting started in Reynosa, then reached Nuevo Laredo and Matamoros, and spread through eleven municipalities, nine of them on the Texas border. On the 5th of October 2010, rival hitmen even killed two Zetas members in Brownsville, Texas. Witnesses called some towns war zones, with homes and businesses burned down.
The Zetas had a second front inside their own ranks. In early 2010, Miguel Treviño Morales, the former second-in-command, reportedly displaced Lazcano. Lazcano had given him too much power and underestimated how violent he was. Many Zetas stopped paying their tributes to Lazcano.
On the 24th of August 2010-72 migrants were found dead in San Fernando, Tamaulipas. Another San Fernando massacre followed in 2011, from the 6th of April to the 7th of June, in which 193 people were killed. In Guatemala, 27 farmers were found killed, a discovery made on the 15th of May 2011. On the 25th of August 2011, an attack on a casino in Monterrey killed 52 people.
The prisons became battlefields too. On the 4th of January 2012-31 Gulf Cartel inmates were killed in a brawl at the Altamira prison. On the 19th of February 2012-44 Gulf Cartel inmates died in a riot at the Apodaca prison, and 37 Zetas escaped.
Other deaths are only suspected to be their work. The Zetas may be responsible for an oil pipeline explosion in Puebla in 2010, which killed 28 people, injured 52 and damaged more than 115 homes. They may also be behind a massacre in Allende, Coahuila, in 2011, where an estimated 300-500 civilians were killed after the Zetas accused two local men of betraying the organization.
The violence reached tourists as well. On the 16th of January 2017, gunfire at the Blue Parrot nightclub in Playa del Carmen, during the BPM Festival, killed five people and injured 15. The dead included two Mexicans, an American, a Canadian and an Italian. A large hand-painted sign hung in town referred to the festival and its co-founder. It was signed El Fayo Z.
On the 17th of December 2010, 141 inmates escaped from a federal prison in Nuevo Laredo. It was one of several mass escapes in Tamaulipas that year. On the 25th of March, forty inmates left a federal prison in Matamoros. On the 5th of April, a convoy of ten trucks carrying gunmen entered a Reynosa prison without resistance and freed thirteen inmates described as extremely dangerous. Six months later, 85 inmates escaped from the same prison. Reports say that more than 400 inmates fled Tamaulipas prisons between January 2010 and March 2011 because of corruption. Even after the federal government sent in the army and federal police, a clash at a Nuevo Laredo prison on the 15th of July 2011 left 7 inmates dead and 59 escaped. Far from Tamaulipas, on the 17th of September 2012, more than 130 Zetas inmates walked from the front gate of a prison in Piedras Negras, Coahuila, to waiting trucks in broad daylight.
Police were poorly placed to resist. Tamaulipas had the worst-paid police in Mexico, and officers in Aguascalientes earned five times as much. On the 7th of November 2011, 650 policemen were removed from duty because they had failed or refused corruption control tests. On the 9th of May 2011, federal police and the army disarmed every police force in the state, starting with Matamoros and Reynosa.
Politics had its own history here. Before the Institutional Revolutionary Party lost the presidency in 2000, after 71 years in power, the government made customary arrests and let cartel business carry on as long as there was no open violence. Once the National Action Party won, the unwritten deals and the pax mafiosa disappeared. Santiago Creel, a politician from that party, said the old ruling party in Tamaulipas had protected the Gulf-Zeta organization for years. Three former governors, Manuel Cavazos Lerma, Tomás Yarrington and Eugenio Hernández Flores, faced formal charges of close ties to it. The assassination of gubernatorial candidate Rodolfo Torre Cantú added to the alarm. In 2011, some analysts concluded that neither the state nor the federal government controlled the territory of Tamaulipas.
Officials were slow to admit it. In mid-2010, Hernández Flores and the mayor of Reynosa, Óscar Luebbert Gutiérrez, both of the old ruling party, called talk of armed confrontations only a rumor. Months later, the governor admitted that parts of the state were being overrun.
At the start of the 2010s, analysts counted the Zetas as the largest criminal group in Mexico by geographic presence. They were based around Nuevo Laredo and Coahuila, with hundreds more members elsewhere. Their lookouts watched airports, bus stations and main roads. They worked along the Gulf of Mexico, in the southern states of Tabasco, Yucatán, Quintana Roo and Chiapas, and on the Pacific coast in Guerrero, Oaxaca and Michoacán, as well as in Mexico City. By 2012 they controlled territory in 11 states, while the Sinaloa Cartel had fallen from 23 states to 16.
The network crossed borders. Operations in Guatemala were reported as early as 2008. The Zetas were also reported to be active in Italy alongside the 'Ndrangheta. In early 2012 they were said to be working with a Colombian group called Los Rastrojos on the border between Venezuela and Colombia. There the partners controlled routes through La Guajira in Colombia and the Venezuelan state of Zulia, which served as the main port route toward the United States and Europe. On the 13th of February 2017, the US Treasury sanctioned Venezuelan vice president Tareck El Aissami under the Foreign Narcotics Kingpin Designation Act, with officials alleging that he had trafficked drugs to the Zetas.
In the United States, a 2010 report found that Sureño street gangs in California and South Carolina kept ties with the Zetas. Other gangs named as connected include MS-13, the Mexican Mafia and the Latin Kings. The Zetas used social media to communicate across the border and to recruit young people who admired the cartel. Drugs moved along the I-10, I-40 and I-35 highways to cities including Chicago and Houston.
Their reach even touched the internet. A hacktivist campaign by Anonymous, called Operation Cartel, began after an Anonymous member was kidnapped in Veracruz during a separate operation. The New York Times noted that the Zetas had infiltrated Mexican law enforcement and could access sophisticated tracking software. The hostage was released, but the Zetas threatened massacres if Anonymous leaked anything more.
A raid under the name Operation Black Jack produced the largest weapons seizure in Mexican history. The ATF, DEA, ICE and FBI investigated, and Mexican forces then raided three Zetas safe houses. They freed more than 40 kidnapped people and seized 540 rifles, 288 of them assault rifles, along with 287 hand grenades, 500,000 rounds of ammunition and 14 sticks of dynamite.
American officials took the group's threats seriously. In October 2008, the FBI warned that a Zetas cell in Texas would answer police with a full tactical response. Its leader, Jaime González Durán, known as The Hummer, was arrested in Reynosa on the 7th of November 2008. In February 2009, Texas governor Rick Perry announced Operation Border Star Contingency Plan, which included tanks, airplanes and the National Guard. In 2012, the Obama administration sanctioned the Zetas as one of four key transnational criminal groups, alongside Russia's Brothers' Circle, Japan's Yamaguchi-gumi and Italy's Camorra. The United States offered a reward of $5,000,000 for Miguel Treviño Morales, known as Z-40.
Mexico escalated its own campaign in early 2012 by announcing five new military bases in the group's main areas. On the 9th of October 2012, the Navy confirmed that Heriberto Lazcano had been killed in a firefight with marines. Treviño Morales was captured on the 14th of July 2013 in Anáhuac, Nuevo León. His brother Omar, known as Z-42, was reported to have succeeded him and was arrested on the 3rd of March 2015. José María Guízar Valencia, known as Z-43, was arrested in Mexico City on the 9th of February 2018, with a reward of $5 million on offer. By 2011, only 10 of the original 34 Zetas remained fugitives.
In May 2013, researcher Daniel Haering told the International Crisis Group, "The old networks were disrupted by the Zetas, and now the Zetas have disintegrated into Zetillas. They are splinter groups ('grupúsculos'), not big operators." By March 2016, factions called Grupo Bravo, Los Talibanes and Zetas Vieja Escuela had allied with the Gulf Cartel against the Cártel del Noreste. The arrests continued into 2019 and 2020, among them José Roberto Stolberg Becerra, known as La Barbie, in April 2019. As of 2025, the US State Department lists Tamaulipas among six Mexican states under a Level 4: Do Not Travel advisory.
Continue browsing
Updated
Common questions
What does the name Los Zetas mean?
Los Zetas is Spanish for The Zs. The group was named after its first commander, Arturo Guzmán Decena, whose Federal Judicial Police radio code was Z1, a code given to high-ranking officers.
Who founded Los Zetas and where did its members come from?
Arturo Guzmán Decena and Heriberto Lazcano persuaded 34 GAFE special forces operators to leave the Mexican Army and form the core of Los Zetas. The first 14 became known as the Group of 14, and they worked as the enforcers of the Gulf Cartel.
Why did Los Zetas split from the Gulf Cartel?
Los Zetas broke away from the Gulf Cartel in February 2010 after growing larger and stronger than the cartel itself. Reports differ on the trigger, citing doubts about a Gulf Cartel leader, a dispute over succession after Osiel Cárdenas Guillén was extradited, and a killing in Reynosa.
What were the worst massacres linked to Los Zetas?
The 2011 San Fernando massacre killed 193 people between the 6th of April and the 7th of June, and the 2010 San Fernando massacre left 72 migrants dead. The 2011 Monterrey casino attack on the 25th of August killed 52 people.
How did the Mexican government weaken Los Zetas?
Mexican forces killed leader Heriberto Lazcano on the 9th of October 2012 and captured Miguel Treviño Morales on the 14th of July 2013. Omar Treviño Morales was arrested on the 3rd of March 2015, and by 2011 only 10 of the original 34 members remained fugitives.
Where did Los Zetas operate?
Los Zetas were based around Nuevo Laredo, Tamaulipas, directly across the border from Laredo, Texas. In the early 2010s they were the largest criminal group in Mexico by geographic presence, controlling territory in 11 states by 2012 and operating in Guatemala, Texas and along the Venezuela-Colombia border.
Does Los Zetas still exist today?
Los Zetas has fragmented since the mid-2010s, and most factions were absorbed by regional rivals or eliminated. Splinter groups such as Grupo Bravo, Los Talibanes and Zetas Vieja Escuela allied with the Gulf Cartel by March 2016, and Tamaulipas still faces extreme violence.
All sources
208 references cited across the entry
- 1NewsThe Zetas: gangster kings of their own brutal narco-stateEd Vulliamy — 14 November 2009
- 2REDUCING CARTEL RECRUITMENT IS THE ONLY WAY TO LOWER VIOLENCE IN MEXICORafael Prieto-Curiel — 2 February 2023
- 3Journal4 de los carteles mexicanos operan en Panamá: Autoridades27 March 2017
- 4MagazineThe Mexican Drug Cartels' Other Business: Sex TraffickingIoan Grillo — 31 July 2013
- 5Zetas4 April 2012
- 6Drug cartels muscle in to piracy businessWilliam Booth — 29 May 2011
- 7NewsMexico's 'most sadistic' drug kingpin's reign ends without a shot firedNick Allen — 16 July 2013
- 8Tortured Mexican kidnap victim says: 'I would sit there wondering how people could be that bad'Jo Tuckman — 4 September 2010
- 10Zetas and MS-13 Join Forces in Guatemala7 April 2012
- 14Iran and Hezbollah's Presence Around the World8 January 2020
- 17BookEl Narco: The Bloody Rise of Mexican Drug CartelsIoan Grillo — Bloomsbury Publishing — 2012
- 19NewsLos Zetas called Mexico's most dangerous drug cartelMichael Ware — CNN — 6 August 2009
- 20Narco TermsBorderland Beat
- 21Why Kidnapping, Extortion Boomed in MexicoElyssa Pachico — 27 March 2017
- 22Zetas27 March 2017
- 23Murder Spotlights Zetas Extortion at Mexico UniversitySeth Robbins — 27 March 2017
- 24NewsThe cartels behind Mexico's drug warKazi Stastna — CBS News — 28 August 2011
- 26A Line in the Sand: Confronting the Threat at the Southwest BorderMICHAEL T. McCAUL — HOUSE COMMITTEE ON HOMELAND SECURITY
- 28Mexico's Zetas drug gang split raises bloodshed fearsWill Grant — 11 September 2012
- 30NewsEl origen de 'Los Zetas': brazo armado del cártel del GolfoCNN México — 5 July 2011
- 31The Rise and Fall of Los Zetas13 October 2017
- 32Proceso: Fracción de Los Zetas, ahora Cártel del Noreste, advierte masacre por extradicionesRevista Proceso — 16 March 2016
- 33What the Zetas-Gulf Split Reveals About the Sinaloa Cartel's Civil WarMichael Park — 2025-04-24
- 35BookWeak bilateral law enforcement presence at the U.S.Mexico borderSubcommittee on Crime, Terrorism, and Homeland Security — November 2005
- 36BookTexas Monthly On . . .: Texas True CrimeUniversity of Texas Press — April 2007
- 37NewsCártel de 'Los Zetas'15 January 2011
- 38ThesisLos Zetas and La Familia Michoacana Drug Trafficking Organizations (DTOs)Albert De Amicis — March 2011
- 39BookMexico: narco-violence and a failed state?George W. Grayson — Transaction Publishers — 2010
- 40News¿Quienes son los Zetas?7 March 2010
- 41Grayson, George W. (2012). The Executioner's Men: Los Zetas, Rogue Soldiers, Criminal Entrepreneurs, and the Shadow State They Created (1st ed.), page 46, Transaction Publishers.
- 42NewsNarco gangster reveals the underworldDane Schiller
- 43The Mexican Drug War and the Thirty Years' WarBellum: The Stanford Review
- 44NewsArmy troops capture a Zetas cartel boss in northern MexicoFox News Latino — 15 February 2011
- 45El Poder de Los ZetasMarco A. Rodríguez Martínez — Monografías — 2006
- 47News¿Qué es el Cartel de Sinaloa?24 August 2008
- 48NewsMexico's Drug War: Soldiers versus Narco-SoldiersAlex Sánchez — 4 June 2007
- 49BookNetworks, Terrorism and Global InsurgencyRobert Bunker — Routledge — July 2005
- 50Drug Trafficking OrganizationsNational Drug Intelligence Center
- 51NewsCartels gang up against gunmenOlga R. Rodriguez — 13 April 2010
- 53La Jornada: Cárteles mexicanos contratan soldados de EU como sicarios y capacitadoresDesarrollo de Medios — 2 August 2013
- 54NewsGuatemala and the Face of the New Sustainable Narco-StateEdward F. Fischer — 11 October 2010
- 55The Evolution of 'Los Zetas,' a Mexican Crime Organizationmexidata.info
- 57NewsLaw and Order in MexicoJune 2010
- 58NewsMexico's Cartels Declare War on the Zetas19 April 2010
- 59NewsGulf Cartel split with Zetas made public10 March 2010
- 61NewsOtro Cárdenas Guillén hereda la organización8 November 2010
- 62NewsAuthorities: Gulf Cartel, Zetas gang up on each other as arrangement dies10 March 2010
- 63NewsWar between Gulf Cartel, Zetas marks year anniversary7 March 2011
- 64TCO 101: The Gulf CartelSylvia Longmire — Mexico's drug war
- 65NewsEjecución de "El Concorde" detonó guerra en Tamaulipas7 March 2010
- 66NewsThe Gulf-Zeta Split and the Praetorian Revolt7 April 2010
- 68NewsEjecución de "El Concorde" detonó guerra en Tamaulipas2010-03-07
- 69NewsMéxico: Los Zetas rompen con el Cartel del Golfo26 February 2010
- 70NewsEU: alarma guerra "Zetas"-El GolfoJaime Hernández — 4 March 2010
- 71NewsEl cártel de los Zetas tiende acuerdos de "no agresión y colaboración"8 March 2011
- 72NewsGulf Cartel lieutenant's associates enter plea agreement13 December 2011
- 73NewsEven more brutal leader takes over Mexico's ZetasE. Eduardo Castillo — 24 August 2012
- 74NewsWhy a Zetas Split is InevitablePachico, Elyssa et al. — 24 August 2012
- 75NewsEven more brutal leader takes over Mexico's ZetasE. Eduardo Castillo — 24 August 2012
- 76NewsMiguel Angel Trevino, Mexico Assassin, Rises In Zetas CartelMark Stevenson — 24 August 2012
- 77NewsFeared Mexican Zetas leader Z-40 now top target24 August 2012
- 78NewsTrump halts plan to treat cartels as terrorists7 December 2019
- 80NewsZetas ejecutaron por la espalda a los 72 migrantes; no pudieron pagar rescate26 August 2010
- 81NewsLocalizan 7 nuevas narcofosas en San Fernando, suman 193 víctimasXavier Flores — 7 June 2011
- 82NewsPolicía encuentra 27 cadáveres en Guatemala; vincula a Los Zetas15 May 2011
- 83NewsPresentan a los Zetas que incendiaron el Casino Royale en Monterrey NL MéxicoMultimedios TV — 30 August 2011
- 84NewsMexico Prison Fight: 31 Killed in AltamiraEfrain Klerigan — 4 January 2012
- 85NewsDozens killed in Mexico prison fightAl Jazeera
- 86NewsDel penal de Apodaca se fugaron 37 reos, no 29, corrigen las autoridades16 March 2012
- 87NewsThieves blamed in Mexico pipeline blast that kills;2819 December 2010
- 88NewsVictims of Mexico's drug war: Tracing the missing14 June 2014
- 89Mexico town fears nightclub shooting means drug war has come17 January 2017
- 90NewsAt least 5 dead, 15 hurt in shooting at Mexico's BPM music festival17 January 2017
- 92El Universal – - Diez ms, prfugos: indagatorias23 June 2013
- 93Zetas boss Heriberto Lazcano's death confirmed11 October 2012
- 95Confirma Rubido muerte de 'El Z-9'Milenio Digital — 5 December 2014
- 97NewsLos Zetas" dominan más territorios que "El Chapo1 January 2012
- 98Nueva ofensiva contra Los Zetas; instalarán cuarteles en frontera norte. ExcélsiorExcelsior.com.mx — 26 January 2012
- 102NewsOmar Treviño, el Z 42, se perfila como cabecilla Zeta16 July 2013
- 104NewsMexican troops 'kill Zetas cartel founder Mellado'12 May 2014
- 105NewsOfficials: Leader of Mexico's Zetas drug cartel capturedFox News Channel — 4 March 2015
- 106Declara 'El Rama', sucesor de Treviño Morales | Azteca Noticiasaztecanoticias.com.mx
- 107NewsMexico: Zetas drugs cartel leader caught9 February 2018
- 108Federal forces capture two cartel chieftains in Jalisco10 April 2019
- 113Presumed Veracruz Zetas chief captured in Oaxaca31 January 2020
- 114Veracruz attorney general confirms cousin is Los Zetas chief22 January 2020
- 115NewsCartel leader dies following Nuevo Laredo gun battleCésar Rodriguez — 30 March 2020
- 116Feared gang leader dies with Covid-19 in prison11 May 2020
- 117NewsTamaulipas, ¿en camino de convertirse en un estado fallido?Alberto Nájar — 13 April 2011
- 118NewsMigrantes, 72 muertos de fosa en Tamaulipas25 August 2010
- 119NewsSin resolver origen de narcofosas en TamaulipasDaniel Sánchez López — 9 April 2011
- 120NewsAsesinan a Rodolfo Torre Cantú, candidato al gobierno de Tamaulipas28 June 2011
- 121NewsTamaulipas: 'Failed state' in Mexico's war on drugsJulian Miglierini — 13 April 2011
- 122Mexico's PRI Names Presidential Candidate.Sylvia Longmire — Mexico's Drug War
- 123JournalThe political economy of narco-corruption in MexicoPeter Andreas — April 1998
- 124NewsMexico's drug war: A pax narcotica?7 January 2011
- 125BookMexico: Current and Future Political, Economic and Security TrendsH. P. Klepak — Canadian Defence and Foreign Affairs Institute — 2010
- 126NewsHay pruebas sobre nexos de priistas con narco: PAN21 October 2004
- 127NewsNarcopolítica en Tamaulipas29 June 2010
- 128NewsBlindaje contra narcopolíticos en TamaulipasAlejandro Salas — February 2010
- 129NewsTamaulipas: gobierno fallidoMartín Moreno — 10 April 2011
- 130NewsBusca PGR contra 3 ex gobernadores de Tamaulipas30 January 2012
- 131NewsPGR emitió alerta migratoria contra tres ex gobernadores de Tamaulipas30 January 2012
- 133NewsFormer Tamaulipas governor named in Texas money laundering caseSergio Chapa — 10 February 2012
- 134NewsArrestan nuevamente a Óscar Pérez Inguanzo, ex alcalde de Tampico12 November 2011
- 135NewsCiudadana graba evidencias de balaceras en Tamaulipas2 March 2010
- 136NewsLa violencia nos rebasó, acepta Eugenio Hernández28 August 2010
- 137NewsAlcalde admite psicosis por violencia en Reynosa25 February 2010
- 138NewsSe fugan 40 reos de penal en Matamoros25 March 2010
- 139NewsSe fugan 40 reos de Penal de Matamoros25 March 2010
- 140News40 reos se fugan de penal de Matamoros25 March 2010
- 141NewsUn comando libera a trece prisioneros de un penal de Reynosa5 April 2010
- 142News85 reos escaparon del penal de Reynosa, precisa el gobierno10 September 2010
- 143NewsAl menos 71 reos se fugan de un penal de Reynosa, en Tamaulipas10 September 2010
- 144NewsAl menos 148 presos se escapan de una cárcel de Tamaulipas17 December 2010
- 145NewsTamaulipas cesa a directivos de penal por la fuga de los 141 reos17 December 2010
- 146NewsAl menos siete muertos y 59 reos fugados en una cárcel de Nuevo Laredo15 July 2011
- 147NewsSe fugan 59 reos en Nuevo Laredo16 July 2011
- 148NewsTras las fugas de reos en Tamaulipas, el gobierno federal se defiende7 April 2010
- 149NewsSe fugan 59 reos en Nuevo Laredo tras enfrentamiento15 July 2011
- 150NewsMás de 400 reos se fugaron de cárceles de Tamaulipas en 14 meses15 July 2011
- 151NewsZetas Drug Cartel Arranged Prison Break, Say OfficialsAlyssa Pone — 20 September 2012
- 152NewsSe fugan al menos 130 presos del Cereso de Piedras Negras17 September 2012
- 153NewsPolicías de Tamaulipas ganan 3 mil 618 pesos25 September 2011
- 154NewsPolicías de Tamaulipas, los peores pagados de México; ganan menos de 4 mil pesos al mes26 September 2011
- 155NewsPolicías de Tamaulipas aun no son confiables: Lomelí7 November 2011
- 156NewsAcusan a estados de incumplir homologación salarial policiaca26 September 2011
- 157NewsExpulsan a mil 650 policías de Tamaulipas por pérdida de confianza7 November 2011
- 158NewsMéxico enviará más Fuerzas Armadas a Nuevo León y Tamaulipas24 November 2011
- 159NewsSedena desarma a policías de Tamaulipas9 May 2011
- 160NewsEl gobierno de México desplegará 2,790 militares en Tamaulipas24 June 2011
- 161NewsTropas mexicanas reemplazan a los policías en la mitad de TamaulipasMariano Castillo — 26 June 2011
- 162NewsBatallones son parte de la estrategia de seguridad16 November 2011
- 163BookCRS Report for CongressCongressional Research Service — 16 October 2007
- 1642011 National Gang Threat Assessment – Emerging TrendsFederal Bureau of Investigation — 2011
- 165JournalThe Evolution of Los Zetas in Mexico and Central America: Sadism as an Instrument of Cartel WarfareGeorge Grayson — 1 April 2014
- 166David F. Marley, Mexican Cartels: An Encyclopedia of Mexico's Crime and Drug Wars, Penguin Press (2011) p. 280.
- 167NewsZetas Now Mexico's Biggest Cartel, Report SaysFox News Channel — 26 January 2012
- 168Los Zetas: the Ruthless Army Spawned by a Mexican Drug CartelGeorge Grayson — U.S. Foreign Policy Research Institute
- 169Alejandro Gutierrez, "Narcotráfico: El gran desafío de Calderón". Mexico City: Lilaneta, 2007, Chapters 1 and 5.
- 173NewsPick your poison: Drug gangs now dominate where guerrillas once reigned28 April 2012
- 174NewsGulf Cartel vs. Los Zetas... One year later26 February 2011
- 175NewsLa ley del silencio en Reynosa sólo la rompe... TwitterKent Penhaul — 21 June 2010
- 176NewsLa guerra Golfo-zetas, en 11 municipios tamaulipecos; nueve son fronterizos con EU12 November 2010
- 178NewsLa batalla del cártel del Golfo y "Los Zetas" por la Huasteca31 December 2011
- 179NewsTwo Zetas executed in Brownsville, Texas25 October 2010
- 181NewsThe Missing in Tamaulipas26 April 2010
- 182NewsLa guerra del cártel del Golfo y Los Zetas, mañana 24 de febrero se cumple un año23 February 2011
- 183NewsAll Tamaulipas, a War Zone22 April 2010
- 184BookExecutinoer's Men: Los Zetas, Rogue Soldiers, Criminal Entrepreneurs and the Shadow State they CreatedGeorge W. Grayson — Transaction — 2012
- 185NewsDEA: acuerdan 3 cárteles alianza contra Los Zetas5 March 2010
- 186NewsSicarios de los Beltrán Leyva y Zetas atacan a gente del Chapo en Sonora2 July 2010
- 187BookExecutioner's Men: Los Zetas, Rogue Soldiers, Criminal Entrepreneurs and the Shadow State they CreatedGeorge W. Grayson — Transaction — 2012
- 188NewsViolence the result of fractured arrangement between Zetas and Gulf Cartel, authorities sayJEREMY ROEBUCK — 9 March 2010
- 190JournalSureños gangs and Mexican cartel use of social networking sitesSarah Womer et al. — 1 March 2010
- 191A Profile of Los Zetas: Mexico's Second Most Powerful Drug CartelSamuel Logan — February 2012
- 192US labels Venezuelan vice-president a drug kingpinLynch et al. — 14 February 2017
- 193NewsU.S. Imposes Sanctions on Venezuela's Vice President, Calling Him a Drug 'Kingpin'Ana Vanessa Herrero et al. — 13 February 2017
- 194NewsEl Ejército decomisa el mayor arsenal hallado en la historia de MéxicoUnion Radio — 7 November 2008
- 195NewsIn Drug War, Mexico Fights Cartel and ItselfMarc Lacey — 7 November 2008
- 196NewsFBI warns of drug cartel armingSara A. Carter — 26 October 2008
- 197NewsTop Gulf Cartel leader arrested in ReynosaJeremy Roebuck et al. — 7 November 2008
- 198NewsThe ZetasExplorando Mexico
- 199Mexico: Fear, Uncertainty and Doubt over Anonymous' #OpCartelGeraldine Juarez — GlobalVoices — 31 October 2011
- 200Combating Transnational Organized CrimeDavid Cohen — United States Department of the Treasury
- 201Narcotics Rewards Program – Target InformationState.gov — 22 January 2009
- 203JournalInside Mexico's Drug WarTomas Kellner et al. — 2010
- 204Anonymous vs. Zetas Amid Mexico's Cartel ViolenceScott Stewart — Stratfor
- 205Drug Violence Swamps A Once Peaceful Mexican CityJason Beaubien — NPR — 26 October 2011
- 206NewsAfter a Kidnapping, Hackers Take On a Ruthless Mexican Crime SyndicateDamien Cave — November 2011