The national human rights commission says it has a credible witness who saw and heard federal police agents okay the abduction of between 15 and 20 of the students.
The Argentine Forensic Anthropology Team found no evidence of the kind of fire required to support the government's earlier conclusion that the students were incinerated at a garbage dump. This is the second external study to demolish that version.
Mexico's national security commissioner did not reveal what makes detainee Gildardo Lopez Astudillo the 'author' of the attacks that left 43 young men missing. Later, an Argentine forensics group confirmed the death of a second student.
Ten months after the first of the missing 43 students was identified, Mexico's attorney general said the second young man positively ID'd is Jhosivani Guerrero de la Cruz, 20.
Despite the damning report by an independent panel, a government official defended the original investigation this week. President Enrique Peña Nieto said he would meet parents of the missing as the one-year mark approaches.
Throughout Latin America, Canadian mining companies are acting with impunity and may have used paramilitary criminal organizations to dispose of anyone in their way.
Dentures were found at the dump where the students were supposedly incinerated, among other anomalies detailed by the Argentine Forensic Anthropology Team. The attorney general struck back at the group, calling its assertions "speculation."
Locals in Chilacachapa told a Mexican newspaper that the Guerreros Unidos cartel rode through their town and carried away 25 people to help them against students "who were going to start a revolution." It is unclear what aid they gave the gang.
In this excerpt, VICE News correspondent Daniel Hernández travels with a volunteer search party in Guerrero, as they uncover a mass grave.
In this extra scene, VICE News travels with students protesting the 43 disappeared students to the Palo Blanco toll booths, as they commandeer the booths in order to raise funds for future protests.
A sensational report surfaced this week of another mass kidnapping in the same municipality in Guerrero, Mexico, where 43 students disappeared earlier this year.