On June 4 Mexican army soldiers freed 165 people, mostly Central Americans, who the authorities said had been held for as much as three weeks by an unidentified criminal organization at a safe house in Las Fuentes, Gustavo Díaz Ordaz municipality, a few miles from the US border in the northeastern state of Tamaulipas. One person, apparently a lookout for the kidnappers, was arrested. The captives were reportedly migrants planning to cross illegally into the US; the smugglers ("polleros") they had hired may have turned them over to a criminal group, possibly the Gulf drug cartel or the Los Zetas gang.

About 253,000 firearms are bought in the US and transported illegally into Mexico each year, according to estimates published on March 18 by researchers at the University of San Diego's Trans-Border Institute and the Rio de Janeiro-based Igarapé Institute. The researchers' report, "The Way of the Gun: Estimating Firearms Traffic Across the US-Mexico Border," estimates that these sales generate $127.2 million a year in revenue and account for about 2.2% of the annual firearms sales in the US. During 2010-2012 an estimated 46.7% of federally licensed firearm dealers "depended for their economic existence on some amount of demand from the US-Mexico firearms trade to stay in business," the report says.

José Antonio Elena Rodríguez, a 16-year-old Mexican shot dead by US Border Patrol agents at the Mexico-US border near Nogales, Arizona, the night of Oct. 10, 2012, was hit by at least eight bullets and maybe as many as 11, according to an autopsy report made available to reporters on Feb. 7. The report, prepared by doctors for the Sonora State Attorney General's Office, found that at least seven of the bullets hit the unarmed teenager in the back. The shooting came a week after an Oct. 2 incident in which a Border Patrol agent was shot dead by other agents in the dark near the border in Cochise County, Arizona.

Friendly fire caused the death of US Border Patrol agent Nicholas Ivie and the wounding of a fellow agent near the Arizona-Mexico border this week. Three agents were patrolling a remote sector about five miles north of the border where sensors indicated the presence of smugglers, when two agents mistakenly opened fire on the third, authorities now say. Ivie himself is now said to have fired first. The clarification came after nearly a week of speculation that Mexican smugglers shot the agents. Yet, in a little-noticed contradiction to what is now the official story, Mexican police arrested two suspects within days of the shootings—raising the possibility that the arrests were a politically motivated response to US pressure. Sen. Chuck Grassley (R-IA) was quick to politicize the death of the agent, claiming possible links to the "Fast and Furious" weapons scandal. Since Ivie was apparently killed by another US agent—using a service weapon, according to ballistic reports—Grassley may have to rescind his statement. (Mexico Solidarity Network, Oct. 8; AP, Oct. 7)