Thousands of Mexicans marched in Mexico City to commemorate the first anniversary of the disappearance of 43 college students on September 26, 2014.
Besides the parents and relatives of the 43 students, families of other lost Mexicans were also among the 8,000 protesters.
On the night of September 26 last year, 43 students from a leftist oriented college hijacked buses to go to a demonstration in the city of Iguala, which is a transfer center for heroin headed to the US, their buses were shot at by the police
According to the official report, the students were confused with rival gang members, drug cartel gunmen and corrupt policemen shot at their busses. The police then handed them over to the gang "Guerreros Unidos [United Warriors]" and the gang incinerated the students at a local dump.
But the families have never accepted the official report.
A recent independent report prepared by the Inter-American Commission on Human Rights (IACHR) stated that to cremate so many people, as the governmental investigation claimed, would require 60 hours of burning time and nearly 60 tonnes of wood, tires and diesel, and refuted the official Mexican report.
Earlier on Thursday, parents of the 43 students went on a 43 hour long hunger strike. President Enrique Pena Nieto met the families for the second time after the incident, while they were on hunger strike.
Some protesters carried signs that read "Crime of the State" and "Get Out Pena," accusing President Pena of covering the case.
Moises Acosta, 30, one of the demonstrators said "The people have gone back to tell the president we don't believe him, we're not idiots. Mexico needs to get to work on this case. It's a lie we're not going to swallow."
Between 2007 and 2015 more than 25,000 people disappeared in Mexico. But this case has made a tremendous impact.
"For me, the parents of the students have taught us a lesson, about keeping hope for change alive," said Carlos Martel, a protester.
Jose Antonio Crespo, a political professor at the Economics Research and Teaching Center commented that this will be a “negative stamp on the government until the end, like 1968 was for the government of Gustavo Diaz Ordaz," referring to the massacre of students during a 1968 protest.