Tomás Zerón de Lucio, the head of Mexico's Criminal Investigations Agency, turned in his resignation to the prosecutor general's office on Sept. 14—amid an internal inquiry into his handling of the case of 43 college students who disappeared nearly two years ago. The undergraduate students, from Ayotzinapa town in Guerrero state, are said to have been abducted by corrupt local police and turned over to a murderous narco-gang—but surviving kin and their supporters increasingly charge Mexico's government with a cover-up in the case.

Amnesty International claims "horrific evidence" of repeated chemical weapons attacks carried out by Sudanese government forces against civilians, including young children. Using satellite imagery, more than 200 telephone interviews with survivors, and analysis of dozens of "appalling images showing babies and young children with terrible injuries," Amnesty's new report, "Scorched Earth, Poisoned Air," indicates that at least 30 likely chemical attacks have taken place in the Jebel Marra area of Darfur since January. The most recent was Sept. 9 Amnesty estimates that between 200 and 250 people may have died as a result of exposure to chemical weapons agents, with many or most being children.

The International Criminal Court released a policy document Sept. 15 calling for prosecution of individuals for atrocities committed by destroying the environment. The document, prepared by chief prosecutor Fatou Bensouda, sets out the types of cases that the court will now prioritize, including willful environmental destruction, illegal exploitation of natural resources, and "land grabbing." The ICC has already shown a willingness to apply its authority to situations involving environmental destruction. Between 2009 and 2010, then-prosecutor Luis Moreno Ocampo successfully obtained arrest warrants from the court against the president of Sudan, Omar al-Bashir, for acts of genocide, war crimes and crimes against humanity. Among other acts, these alleged crimes involved the contamination of wells and destruction village pumps in Darfur to deprive targeted populations of water. Al-Bashir's trial has not yet commenced as he continues to evade arrest. (The Conversation, Sept. 23)

Peru launched its first satellite into space this month, to monitor illegal mining, logging and other extractive activities in the country's vast stretch of the Amazon rainforest. The Peru SAT-1, developed with French aid and the most sophisticated in Latin America, was launched Sept. 15 from Kourou Spaceport in French Guiana and monitored from the Satellite Images National Operations Center (CNOIS) in Pucusana, south of Lima. The satellite bears the logo of Peru's space agency, CONIDA, with the words "Kausachun Peru" (Viva Peru in Quechua). (Peru This Week, Nature, Sept. 15)

Colombia's long civil war came to an official end Sept. 26 as President Juan Manuel Santos met with FARC leader Rodrigo Londoño Echeverri AKA "Timochenko"  to sign a formal peace pact at Cartagena's convention center. The ceremony, with dignitaries and attendees all clad in white, was witnessed by UN Secretary General Ban Ki-moon, and 15 Latin American heads of state. A place of honor was held by Cuban President Raúl Castro Ruz, whose country has hosted the peace dialogue with the FARC over the past two years. On Oct. 2, the deal will go before Colombia's voters in a national plebiscite. but Timochenko has publicly stated that even if the accord is not ratified by voters, there will be no return to war. Santos is more equivocal, telling reporters in the prelude to the ceremony: "If 'No' wins, we will return to what we had at the start of this government six years ago. We return to armed conflict. That would be a catastrophe for the country." 

Following a trial lasting seven years and four months, a court in Peru's Amazonas region on Sept. 22 absolved 52 indigenous leaders in charges related to the 2009 Bagua massacre. Initially, charges were brought against 53, but one defendant died over the course of the proceedings. The Penal Chamber of Bagua district found insufficient evidence that the accused indigenous protesters had handled firearms at the scene of the massace, in which at least 32 lost their lives. The defendants faced charges in the deaths of 12 police officers at the scene. The violence began when National Police troops attacked protesters blocking the road at Devil's Curve on June 5, 2009—yet no police officer or commander has served time for the massacre. The incident came amid indigenous protests over changes to Peru's land tenture system pushed through in preparation for the Free Trade Agreement with Washington and aimed at opening the rainforest to oil exploitation.

Máxima Acuña de Chaupe, the campesina grandmother in Peru's Cajamarca region who won the prestigious Goldman Environmental Prize for defense of her lands from the Yanacocha mining company, survived an attack that took place on her property the morning of Sept. 18. "She has fainted!" are the last words heard in a video recorded by Yanacocha security personnel. The video indicates between 15 and 20 helmeted security guards entered Acuña's property, and began uprooting a 200-square-meter field planted with potatoes and yucca. When Acuña and her husband, Jaime Chaupe, began shouting and throwing rocks, they were set upon by security guards, sustaining blows to the body and head. Yanacocha claims the family is illegally occupying the field, and issued a statement saying the company was "peacefully exercizing its rights" in the incident.

International outrage over the mounting wave of executions in Iran reached another milestone Aug, 27, when 12 drug convicts were hanged at Karaj Central Prison outside Tehran. Days earlier, when the 12 were transferred to solitary confinement at the facility in preperation for the executions, the United Nations issued an urgent plea. Special Rapporteur on the human rights situation in Iran, Ahmed Shaheed, called on the Islamic Republic to stay the executions immediately. After they were carried out, Shaheed's response was harsh.