A dispute over a water pipeline in San José del Progreso, a municipality in the Ocotlán district of the southern Mexican state of Oaxaca, turned deadly on Jan. 18 when supporters of Mayor Alberto Mauro Sánchez Muñoz reportedly opened fire on demonstrators. Protesters Bernardo Méndez Vásquez and Abigail Vásquez Sánchez were wounded; Méndez Vásquez died the next day in a hospital in Oaxaca city, the state capital. Both were members of the United Peoples of the Ocotlán Valley Coordinating Committee (COPUVO), which has been engaged in a three-year struggle against the Trinidad silver mine owned by Compañia Minera Cuzcatlan S.A. de C.V., a subsidiary of Vancouver-based Fortuna Silver Mines Inc.

On Jan. 12 ballistics experts and investigators from Mexico's governmental National Human Rights Commission (CNDH) carried out a reconstruction of a confrontation last month between student protesters and police on a highway in the southwestern state of Guerrero. Two students from the Raúl Isidro Burgos Rural Teachers' College in the nearby village of Ayotzinapa were killed on Dec. 12 when state and federal police tried to disperse some 500 protesters blocking the highway; a worker at a gas station near the road also died, in a fire reportedly caused by a Molotov cocktail thrown by a student.

Agents of the US Drug Enforcement Administration (DEA) worked with an informant and with Mexican enforcement agents in 2007 to launder millions of dollars for Mexico's Beltrán Leyva cartel, according to reports in the New York Times and the Mexican magazine emeequis. The information comes from the Mexican government's response to a US request for the extradition of Harold Mauricio Poveda-Ortega, a Colombian drug trafficker arrested in Mexico in November 2010.

Former Mexican president Ernesto Zedillo Ponce de León (1994-2000) filed papers in US district court in Hartford, Connecticut, on Jan. 6 claiming that his presidential status gives him immunity from a legal action stemming from a December 1997 massacre in the southeastern state of Chiapas. Ten unnamed survivors of the massacre of 45 indigenous campesinos in the community of Acteal are demanding $50 million in damages in a suit they filed against Zedillo in Hartford on Sept. 19. The former president is currently teaching at Yale University in New Haven, Connecticut. Since he is in the US, he is subject to two US laws—the Torture Victim Protection Act of 1991 and the 1789 Alien Tort Claims Act—which permit foreigners to bring suits in US courts for violence that occurred in other countries.

Dozens of students occupied four radio stations in Chilpancingo, capital of the southwestern Mexican state of Guerrero, for about an hour on Jan. 3 in an attempt to publicize their positions on an ongoing conflict at the Raúl Isidro Burgos Rural Teachers' College in the nearby village of Ayotzinapa. The conflict intensified when two students were shot dead on Dec. 12 as state and federal police attempted to remove some 500 protesters blocking the Mexico City-Acapulco highway to push their demands for improvements at the school. The students, along with parents and other supporters, occupied the school over the Christmas and New Year break and said they planned to maintain their mobilization after the official school opening on Jan. 3.

Mexican federal officials have mobilized thousands more military troops to violence-torn northeastern Tamaulipas state in an emergency move prompted by escalating violence—punctuated by a prison riot that left over 30 dead on Jan. 4. The move brings the total of army troops patrolling Tamaulipas to 13,000, plus thousands more navy troops and federal police agents. The deadly riot broke out at the Santa Amalia prison in the city of Altamira—a facility designed to hold 2,000 inmates but which has a population of more than 3,000. The fighting apparently pitted followers of the Gulf Cartel against adherents of the rival Zetas narco network. A similar incident left 20 dead at a prison in nearby Matamoros in October.

On Dec. 28 the government of the southwestern Mexican state of Guerrero announced the arrest of police commander Cesario Espinoza Palma (or "Cesáreo Espinosa Palma") in connection with the Dec. 7 kidnapping of two campesino environmental activists, Eva Alarcón and Marcial Bautista. Nicknamed "The Goose," Espinoza Palma is the coordinator of the state Ministerial Investigative Police (PIM) for Tecpan de Galeana municipality; his arrest seems to be related to investigators' questioning of 24 Tecpan municipal police and four PIM agents on Dec. 15.

Mexican federal police on Dec. 28 announced the arrest at Mexico City’s international airport of Luis Rodríguez Olivera AKA "El Guero" (Blondie)—a narcotics kingpin who has collaborated with various of Mexico's warring cartels, and who was indicted in US federal court in 2009. U.S. authorities offered a reward of up to $5 million for Rodríguez Olivera, who with his brother Esteban (extradited to the US in March) is accused of smuggling tons of cocaine and methamphetamine into the United States and Europe, mainly through Texas. In a statement, Mexican police said Rodríguez Olivera and his brothers led a gang called Los Gueritos (The Blondies) that formed temporary alliances with the Gulf Cartel and Zetas, but worked between 1996 and 2008 for the Sinaloa Cartel, the country's most powerful. He is being held until a hearing on a US extradition request. (BNO News, Dec. 29; AP, Reuters, Dec. 28)