In this Nov. 29, 2015 photo, a masked man claiming to be responsible for kidnapping, torture and killing while defending against a drug cartel's incursion into his territory speaks to the Associated Press somewhere in Guerrero state's Costa Grande region, Mexico. There are many reasons people are disappeared, the man says. It may be for belonging to a rival gang, or for giving information to one. If a person is a considered a security risk for any reason, he may be disappeared. Some people are kidnapped for ransom, though he says he does not do this. (AP Photo/Dario Lopez-Mills)
In this Dec. 3, 2015 photo, necklace pendants in the shapes of weapons, crosses and hearts are for sale at a shop in Iguala, Mexico, a city that for decades was one of Mexico's top destinations for jewelry shoppers. According to the new Mayor Esteban Albarran Mendoza, at one time his city was only second to Guadalajara in gold sales. But in the year since 43 students disappeared at the hands of the police and drug gangs, thrusting the city on to the world's map, jewelry sales have dropped 70 to 80 percent. The local economy is in bad shape and many businesses are facing hard decisions if the situation doesn't improve. (AP Photo/Dario Lopez-Mills)
In this Wednesday, April 22, 2015 photo, people search for clandestine graves amidst dry vegetation on the outskirts of Iguala, Mexico. A group of relatives of missing persons in the region has banded together to search for their missing relatives. Since the government began excavating suspected graves found by this group scouring the surrounding mountains looking for their loved ones late last year, more than 100 bodies have been exhumed though most still await identification. (AP Photo/Dario Lopez-Mills)
In this May 31, 2015 photo, relatives of missing people walk in a field as they search in vain for a site of a possible clandestine grave after they received an anonymous tip in Iguala, Mexico. A group of relatives of missing persons in the region has banded together to search for their missing relatives. Since the government began excavating suspected graves found by this group scouring the surrounding mountains looking for their loved ones late last year, more than 100 bodies have been exhumed though most still await identification. (AP Photo/Dario Lopez-Mills)
In this May 14, 2015 photo, flowers and religious icons surround photos of Hugo Bailon Lopez at his mother's home in Taxco, Mexico. Lopez was a 27 years old taxi driver when he disappeared on Dec. 19, 2011. He is among the 25,000 Mexicans who have disappeared since 2007, according to the government’s count. (AP Photo/Dario Lopez-Mills)
In this Tuesday, April 21, 2015 photo, Yuridia Anahi Cano Bahena shows the back of her t-shirt that says "I'll search for you until I find you" as she poses for a photo holding an image of her missing brother, Julio Wilber Ulises Cano Bahena in Iguala, Mexico. Her brother was 35 years old when he went missing on Jan. 10, 2010. (AP Photo/Dario Lopez-Mills)
In this May 31, 2015 photo, relatives of missing people search for signs of a possible clandestine grave after they received an anonymous tip in Iguala, Mexico. A group of relatives of missing persons in the region has banded together to search for their missing relatives. Since the government began excavating suspected graves found by this group scouring the surrounding mountains looking for their loved ones late last year, more than 100 bodies have been exhumed though most still await identification. (AP Photo/Dario Lopez-Mills)
In this Nov. 29, 2015 photo, a masked man claiming to be responsible for kidnapping, torture and killing while defending against a drug cartel's incursion into his territory speaks to the Associated Press somewhere in Guerrero state's Costa Grande region, Mexico. He says he sometimes feels sorry about the work he does but has no regrets because he is providing a kind of public service, defending his community from outsiders. According to him, things would be much worse if rivals took over. (AP Photo/Dario Lopez-Mills)