Mexico’s president, Enrique Peña Nieto, told the families of 43 students who disappeared a year ago in southern Mexico, during a meeting on Thursday, that he would create a new special prosecutor for all of the country’s thousands of missing people.

Eduardo Sanchez, the president’s spokesman, told reporters after the closed-door meeting that the families had presented eight demands and that Peña Nieto had instructed his cabinet to analyze each one and get back to them.

More than 25,000 people disappeared in Mexico between 2007 and 31 July, 2015, according to the government. The students’ disappearance on 26 September, 2014, brought the issue back into the spotlight.

Among the families’ demands are a new internationally supervised investigation of the disappearances and an investigation into those responsible for the initial inquiry, which the families believe was intended to mislead them.

Sanchez said after the meeting that there was not a clear timeframe for when the demands would be answered, but that it would be done promptly.

“Again and again we ask ourselves how could we trust again in an institution that tricked us,” the families wrote in the letter delivered to the president.

Sanchez said Peña Nieto told the families: “We’re on the same side. You and I are looking for the same thing.”

The students disappeared on 26 September, 2014, in the city of Iguala. They had gone there to commandeer buses they wanted to use to attend a commemoration in Mexico City. The federal government has said local police from Iguala and the nearby town of Cocula illegally detained the students and turned them over to the local drug gang Guerreros Unidos, which then allegedly killed them and incinerated their remains. The families have never accepted that version.

The government has said that it has identified two of the students from the burned remains recovered from a river in Cocula.

A team of international experts sent by the Inter-American Commission on Human Rights, which spent six months reviewing the government’s investigation, found a number of shortcomings and points of concern. Specifically, it concluded the bodies of 43 students could not have been burned at the garbage dump in Cocula as the government maintained.

Attorney general Arely Gomez earlier said that portion of the government’s investigation would be reviewed with assistance from top international experts. Sanchez confirmed Thursday that international experts would be involved in a third investigation of the alleged incineration site.