HouseMan

March 19, 2011MEXICO CITY — Arturo Beltran-Leyva, a notoriously cruel cartel boss and one of Mexico's most wanted criminals, threw a riotous Christmas party two years ago with Grammy-winning musicians, prostitutes, and lavish food and drinks.
U.S. law enforcement agents in Mexico, electronically spying on Beltran-Leyva, relayed detailed information to U.S.-trained Mexican Navy Special Forces, who crashed the fiesta. After a 90-minute shootout, the cartel leader fled with a gut wound.
U.S. detectives next electronically tracked Beltran-Leyva, 48, to a posh apartment in nearby Cuernavaca. With their help, 200 Mexican Special Forces rolled in on tanks and rappelled from helicopters. The next morning, photos of Beltran-Leyva's bloody body, plastered with bank notes, were splashed across Mexican front pages.
At the time, it was considered a rare success in U.S.-Mexico law enforcement cooperation. Now, unprecedented numbers of U.S. law enforcement agents work in Mexico, and high-profile arrests occur monthly. U.S. drones spy on cartel hideouts, while U.S. tracking beacons pinpoint suspect's cars and phones.
"Yes, we're tracking vehicles, yes, we're tracking people," says Brad Barker, president of HALO Corporation, a private security firm that, among other things, helps rescue kidnapped people in Mexico. "There's been a huge spike in agents down there."
The bilateral cooperation is touching off Mexican sensitivities about sovereignty, while stoking U.S. debate about the wisdom of inserting American operatives so deep into the fight. More than 35,000 people have been killed in drug trafficking violence since President Felipe Calderon launched a crackdown four years ago, and the killing of a U.S. agent last month prompted the U.S. Congress to schedule hearings into the role of American personnel.
The U.S. agents generally provide intelligence and training, while Mexicans do the hands-on work. Neither side will say exactly how many agents are in Mexico, citing security concerns, but The Associated Press was able to identify several hundred, using the Freedom of Information Act, federal budget requests, government audits, congressional testimony and agency accountability reports.