FILE - In this Feb. 9, 2014 file photo, an unidentified armed man from a self-defense group stands with his weapon at the entrance of Apatzingan in Michoacan state, Mexico. Authorities announced on Monday, March 31, 2014 they have arrested Enrique Hernandez Salcedo, the leader of a vigilante "self-defense" force in the town of Yurecuaro in western Mexico, and accused him of participating in the killing of a rival, the second such arrest in less than a month. (AP Photo/Marco Ugarte, File)