Although the public outcry over the 43 students that went missing in Iguala on Sept. 26 has been extreme, protests seem to have done little to hasten investigations.

As reported in the BBC, investigators on the case say Mexico has yet to respond to a request to interview soldiers over the disappearance of the students from the Raúl Isidro Burgos Rural Teachers' College.

Officers informed investigators that the missing students, who were engaged in a protest, clashed with the police and were subsequently handed over to a drug gang to be dealt with. Despite the Mexican government saying that the army played no part in the disappearance, a number of relatives of the missing 43 believe that soldiers on scene that day may have taken an active part in the events that led to the disappearance of their loved ones.

Members of the Guerreros Unidos gang have confessed to killing the students and to incinerating their bodies. In December forensic experts identified one of the missing, Alexander Mora, among the charred remains found in a landfill.

In January, then attorney general Jesús Murillo Karam detailed the fate of the 43 students, saying, as reported in The New York Times, “The evidence allows us to determine that the students were kidnapped, killed, burned and thrown into the river.”

The families of the victims maintain that soldiers may have failed to act as the police opened fire on the students and then later rounded them onto a bus to be delivered to the gang.

Investigators from the Inter-American Commission on Human Rights wish to question soldiers that responded when the students clashed with police, saying they would like to interview several dozen soldiers in order to see if they could offer information on what exactly occurred that night.

A statement from the investigators notes they are concerned over the delay in the government's response, having made the request three months ago.

A final report from the commission, which explained the Mexican government continues to mull over their request to talk to the soldiers, is due in September.