On Sept. 26—one year anniversary of the disappearance of 43 students in Mexico's southern state of Guerrero—thousands of protesters filled the streets of Mexico City. The march, led by parents of the missing students, made its way from Los Pinos, the presidential residence, to the Zócalo, the capital's massive central square. Protests were also held in Iguala, Guerrero, where the 43 students from a teachers' college in nearby Ayotzinapa were abducted one year ago. Many carried mass-produced placards that read "Ni un desaparecido más, Ni un muerto más—¡¡Fuera Peña Nieto!!"—"Not one more disappearance, not one more death—Out with Peña Nieto!!" The administration of President Enrique Peña Nieto is under growing pressure in the case. There have now been 110 arrests of members of the Guerreros Unidos narco-gang, named by the government as responsible in the mass abduction. But there have been no convictions. The government says the students were massacred by the drug gang, and claims two sets of remains have been identified. But survivors, activists and rights observers say the official story doesn't hold water.

Mexico's Prosecutor General Arely Gómez González announced Sept. 16 that forensic experts have identified the remains of a second victim in the case of the 43 missing students. Human remains found in plastic bags dredged from the Río San Juan in Guerrero state are said to be those of missing student Jhosivani Guerrero de la Cruz. The identification was made by Austrian forensic experts from Innsbruck Medical University, who had earlier identified one other student based on a bone fragment. But the announcement came amid new controversy, as an Argentine forensic team working on the case called the identification of the second set of remains "weak and not definitive." The Argentine Forensic Anthropology Team (EAAF) made the announcement after meeting with the parents of Jhosivani Guerrero two days after the Prosecutor General's announcement.

A group of experts appointed by the Inter-American Commission on Human Rights (IACHR) has just issued a new report on the Mexican government's own investigation of the disappearance of 43 students in Guerrero state nearly one year ago—and finds that the official conclusions are improbable. The Sept. 5 presentation of the IACHR findings drew such a huge audeince that organizers had to set up a TV screen for the overflow crowd on the patio of the Mexico City Human Rights Commission offices. Back in January, Mexico's then-Prosecutor General Jesús Murillo Karam announced the results of his investigation: all the students had been killed by members of a narco-gang called the Guerreros Unidos, who incinerated the bodies in a trash dump at the bottom of a canyon, then shoveled what remained into plastic bags and threw them in a river. That theory was largely based on confessions from detainees—who have since claimed to have "confessed" under torture. IACHR investigators who visited the dump site concluded that the incineration of that many bodies would have required an inordinate amount of fuel, and caused a massive forest fire.

Miguel Ángel Jiménez Blanco, a leading activist in Mexico's violence-torn state of Guerrero and a vocal advocate for the families of the 43 students who went missing there in September 2014, was himself found dead on Aug. 10. His body was discovered riddled with bullets and slumped over the wheel of the taxi he owned in the pueblo of Xaltianguis, just outside Acapulco. He had led search parties after the disappearance of the students, who are now believed to have been turned over to a murderous narco-gang after being detained by police. Only one body of this missing students has yet been found. As it became increasingly clear the students had been killed, he helped organize a group called The Other Disappeared—mostly women, who meet every Sunday to search the hills for the remains of their loved ones. Since the group began work, it has unearthed 129 bodies, which were handed over to the authorities for identification. As he began to organize around the issue, Jiménez Blanco said some 300 families came forward saying they also had missing relatives. He said in a BBC interview earlier this year: "We have been saying from the start that this area is a cemetery."

After an electoral season marred by narco-violence and assassination of candidates of all parties, the results from Mexico's June 7 vote are in. The coalition led by the Institutional Revolutionary Party (PRI), which ruled Mexico as a one-party state for 80 years, maintains its slim majority in the lower-house Chamber of Deputies, although it lost some seats. Gubernatorial races were also held in several states, including some hit especially hard by the cartel violence. The PRI gained the governorship of Guerrero, but lost control of Michoacán to the left opposition. In one upset, the PRI lost northern Nuevo León state to an independent, Jaime "El Bronco" Rodríguez Calderón—the first independent candidate to win a governorship in Mexico. The gadfly rancher survived two assassination attempts by the Zetas when he was mayor of García, a Monterrey suburb. His son was killed in an attempted abduction, and his young daughter kidnapped, although returned unharmed. El Bronco beat the PRI and other estabished parties with a populist campaign and invective against entrenched corruption. With the state's establishment press bitterly opposed to him, he made deft use of social media to mobilize support. (Reuters, BBC News, Televisa, CNN México, June 8)

Mexico's drug cartels appear to have declared open season on any candidate for public office who will not toe their line in the run-up to June's midterm elections. On May 14, mayoral candidate Enrique Hernández Salcedo was shot to death by gunmen who fired from a passing truck as he was making a speech in the town of Yurécuaro, Michoacán. Three spectators were injured. Hernández was a leader of the town's "self-defense force," which took up arms to break the grip of the Knights Templar drug cartel in the region. He was running with the left-opposition Morena party.

March 28 saw more angry protests in Mexico's conflicted southern state of Guerrero, as students from the rural college of Ayotzinapa clashed with police in the state capital Chilpancingo at a march demanding the return alive of the 43 abducted students from the school. Cars were set on fire as police attacked the marchers. The 43 students disappeared during protests in the Guerrero town of Iguala last September, and are now believed to have been turned over a murderous narco-gang by corrupt police. The weekend before the Chilpancingo demonstration, family members of some of the 43 missing students held a vigil in New York City's Union Square—one stop on a tour of US cities to raise awareness on their plight and protest Washington's "Drug War" aid to Mexico's brutal and corrupt police forces.

Aidé Nava, 42-year-old woman running for mayor in Mexico's conflicted southern state of Guerrero, was found decapitated March 11, a day after she was abducted in her hometown of Ahuacuotzingo. The decapitated body was found in the municipality's outlying hamlet of Tecoanapa with a note signed by Los Rojos, one of the main Guerrero narco-gangs, threatening the same treatment for any politician who does not "fall in line." She had been seized the previous day by gunmen who stopped her campaign bus on a rural road. Nava's family, activists with the leftist Party of the Democratic Revolution (PRD), had long been under threat. Her husband Francisco Quiñonez Ramírez, the former mayor of Ahuacuotzingo, was gunned down by an assassin in June 2014. Their son, Francisco Quiñonez Nava, was kidnapped in October 2012 and remains missing.