May 12 – Galindo Mellado Cruz, one of the founding members of the Mexican drug cartel Los Zetas, and four other armed men are killed in a shootout with Mexican security forces after they raided Cruz's hideout in the city of Reynosa.
June
July
August
27 August–September: CENAPRED reported explosions of Popocateptl, accompanied by steam-and-gas emissions with minor ash and ash plumes that rose 800-3,000 m above the volcano's crater, which drifted west, southwest, and west-southwest. On most nights incandescence was observed, increasing during times with larger emissions.
October 4 – A mass grave is found outside Iguala, Guerrero, southern Mexico, during the search of the students from Raúl Isidro Burgos Rural Teachers College of Ayotzinapa.[5]
November 4 – Mexican Federal Police arrest a mayor and his wife, the alleged masterminds of the kidnapping of 43 students in Iguala, Guerrero.
November 7 – Parents of Mexico's missing students say authorities found 6 bags containing unidentified corpses; investigations are underway to determine if they are of the missing students. Three people confess their involvement in the massacre.
November 11 – A mob angry at the kidnapping and murder of 43 students torches the regional headquarters of Mexico's ruling Institutional Revolutionary Party (PRI) in Chilpancingo, Guerrero, and briefly holds a police commander hostage.
November 12 – Protesters attack the State Congress building in Guerrero setting alight five vehicles.
November 20 – Thousands of protestors gather in Mexico City for a national rally in memory of the 43 missing students. Demonstrators have also called for a nationwide strike.
November 26 – Mexico's Party of the Democratic Revolution (PRD) founder Cuauhtémoc Cárdenas resigns amid internal political crisis resulting from the disappearance of the 43 students in September.
