"It's logical that illegal arms enter from the United States because the United States is an enormous market for guns," said security specialist Jorge Chabat, who works at the Center for Economic Teaching and Research. "It is easy to get the guns there and it is very easy to cross the border with them."
"It's a problem that goes back years," he added. "In diplomatic reunions, the Mexican government constantly complains to the United States about the arms trafficking and says the U.S. government should do more to prevent it."