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.
The video reveals some previously unseen footage but leaves several questions unanswered about the operation, and contains an embarrassing mistake.
El Chapo's now famous mobile conversations with actress Kate del Castillo while he was Mexico's most wanted fugitive are just one of many examples of seeming carelessness that has brought down capos who are supposed to be experts in security.
In the week since Joaquín "El Chapo" Guzmán was sent back to the prison from which he escaped in July, a cascade of revelations has shown drug trafficking infamy to be inextricably mixed up with Hollywood celebrity culture.
The drug lord is back in the same maximum-security prison from which he escaped in July after a spectacular arrest that reads like a screenplay, though the ending presumably differs from the biopic the Mexican authorities say he was planning.
Drug lord Chapo Guzmán's escape from a maximum-security prison overshadowed the arrest of other capos and underlined how few new ideas the government has brought to the fight against Mexico's cartels.
The Mexican government claims to have incarcerated almost all those who helped Joaquin "El Chapo" Guzmán escape from jail, at the same time as it faces allegations of abuse in a failed operation to recapture the kingpin.
The UN's High Commissioner for Human Rights slammed Mexico's record on abuses, torture, and illegal executions, saying 'I wish everyone could meet' victims of state violence in the country.
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.
The day before the extradition order became public, Joaquin "El Chapo" Guzman's lawyers were already filing an appeal in court to stop it.
It's been ten months since the 43 Ayotzinapa students disappeared. The missing sparked a volunteer movement to find others who have vanished in Guerrero. In Iguala alone, 129 bodies have been found so far.