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TIXTLA, Mexico – Mexican police expanded their search for 43 missing college students Wednesday after investigators determined that 28 sets of human remains recovered from a mass grave were not those of any of the youths.
The government of Guerrero state, where the students went missing after a confrontation with police Sept. 26, said it was sending horse-mounted patrols and trained dogs into the hills around Iguala, the city where the students were last seen.
Meanwhile, forensics examinations are focusing on a second set of clandestine graves and a third site where another burial pit was found this week.
The digging that continued Wednesday threatened to reveal even greater horrors in the gang-controlled countryside. Each search has turned up more hidden graves, raising the question of how many people have been secretly killed by the area's drug gangs, apart from those kidnapped.
The wooded hillsides that ring Iguala could become a moral swamp for the government, much like the mass graves discovered in northern Mexico in 2010 that revealed a level of almost unheard-of brutality.
"These lamentable acts are a moment that puts to the test the country's institutions," President Enrique Pena Nieto said of the Iguala case in a speech.
From the beginning, there were signs that the first mass grave site, found just a few days after the students disappeared, might have contained the bodies of earlier victims of the Guerreros Unidos drug gang. The gang had ties to the wife of Iguala Mayor Jose Luis Abarca as well as to local police from Iguala and the nearby town of Cocula. Police from the two towns allegedly turned some of the students over to the drug gang.
On Wednesday, while the families of the disappeared students and a variety of social organizations met separately at the college in Tixtla, four busloads of students drove to join members of a Guerrero teachers union who took control of a highway toll facility between Chilpancingo and Acapulco. Masked protesters politely asked each driver for a 50-peso contribution — slightly less than the usual toll.
Gildardo Ruiz Davila, organizing secretary for the union's High Mountain region, said such protest actions would continue until the 43 students are returned alive. Asked about the announcement that none of the first 28 bodies found were students, he said, "If the city government had links to the drug traffickers, more bodies might appear."
Isabel Rosales, an activist who works with the families of kidnap victims in Guerrero, said the 28 bodies might be those of victims whose families were too afraid to even report their disappearances.
Given the fact that local authorities are frequently thought to be in cahoots with drug gangs, she said, "there is a lot of fear, terror among the public."
"Out of fear, many people don't even file reports, hoping their loved ones will be released," Rosales added.
The situation in Iguala was so murky that when six young men went missing there in 2010, and witnesses said they were taken away in military vehicles, their mothers went to the local military base looking for them, Rosales said.
"The base commander told them that drug gangs were driving around in fake army trucks," Rosales recalled.