In September 2014, 43 students from a teachers’ college were abducted in the town of Iguala, in Mexico’s Guerrero state. What exactly happened to them remains uncertain; so far, the remains of only one student have been found. Miguel Angel Jimenez Blanco (below) headed a community effort to scour the countryside around Iguala for the missing students, leading search parties that uncovered grim evidence of dozens of other disappearances and killings. In August, Jimenez was discovered shot to death. “Despite the personal risk he faced in doing the job,” says photographer Chris Gregory, “he felt that somehow it made Mexico a safer place for his children.”

Miguel Angel Jimenez

Jimenez stands just steps from the Cocula dump, where the remains of one of the 43 disappeared students was found. In 2013, Miguel Angel Jimenez left his life as a cosmetics salesman to help organize community efforts to identify graves, register disappeared persons, and get government support for victims’ families. Chris Gregory
Miguel Angel Jimenez points at a cross etched in a tree trunk he thought to have been a criminal's last attempt at remorse at the grave site where 28 people were burned and buried.

At a site where 28 people were burned and buried, Jimenez points at a cross etched in a tree trunk that he thought represented a criminal’s attempt at remorse. Chris Gregory
Miguel and a family member search a corn field near the site of there PGR forensic teams are investigating possible gravesites.

Jimenez and a family member of a missing person search a corn field close to where forensic teams are investigating possible gravesites. Chris Gregory
A team of family members combing the mountains near Cocula after receiving a anonymous tip that there had been cartel activity in this area.

Family members comb the mountains near Cocula after receiving an anonymous tip that there had been drug cartel activity in the area. Chris Gregory
A landscape of Butcher's Hill near Cocula where searchers received a tip about cartel activity in the area. This area is adjacent to the Cocula dump where the 43 students are believed to have been burned.

Searchers received a tip about cartel activity around Butcher’s Hill, an area that’s adjacent to the dump where the 43 students are believed to have been burned. Chris Gregory
Belongings found at various sites around Iguala. Clothing and trash is an uncommon site in this rural and thickly vegetated mountains. Most often they are signs that people were held in kidnapping camps in the area.

Clothing and trash are uncommon sights in the thickly vegetated mountains outside Iguala. Often they are evidence of kidnapping camps. Chris Gregory
This grave was found outside of Iguala soon after the 43 students disappeared. At first authorities suspected the graves contained the students but DNA confirmed that none of the 28 bodies belonged to the students shedding light on the years of disappearances that have plagued Iguala.

This grave was found outside Iguala soon after the 43 students disappeared. DNA confirmed that none of the 28 bodies belonged to the students. Chris Gregory
Towns people gather with law enforcement officials during a town hall at the San Gerardo church to air their concern that the government has not done enough to find their missing.

At a town hall meeting, residents air concerns that the government has not done enough to find their missing family members. The meeting lasted almost eight hours. Chris Gregory
These belongings and trash were found near a grave that was found outside of Iguala soon after the 43 students disappeared. At first authorities suspected the graves contained the students but DNA confirmed that none of the 28 bodies belonged to the students shedding light on the years of disappearances that have plagued Iguala. Here Miguel holds up a "Manchester" brand shirt in good condition.

Jimenez holds up a shirt found near the mass grave outside of Iguala. Chris Gregory
Twenty-year-old Jesus Pineda Corona helping the search effort. His shirt reads: I will search for you until I find you."

Twenty-year-old Jesus Pineda Corona helps with the search effort. His shirt reads, “I will search for you until I find you.” Chris Gregory