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The former police chief of Iguala, where 43 students went missing in 2014, was detained Friday after two years at large in a development that Mexican authorities hope could shed new light on the disappearances.

The National Security Commission announced that federal agents arrested Felipe Flores in Iguala, in the southern state of Guerrero, in the morning.

Attorney General Arely Gómez tweeted that the detention "will allow the collection of key testimony to clarify the facts of Iguala."

The students from the teacher's college at Ayotzinapa were taken by police in Iguala on Sept. 26, 2014, and have not been heard from since.

Prosecutors say they were handed over to a drug gang, killed and incinerated in a massive fire at a trash dump. But independent experts who reviewed evidence in the case have cast into doubt the contention that the students' bodies were burned, and the victims' families continue to vocally demand more answers.

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The disappearances and authorities' inability to conclusively clear up what happened to the students have been an embarrassment for the government of President Enrique Peña Nieto.

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