Suspect is alleged leader network believed to be smuggling guns into Mexico . Last week , 2,000 Mexican troops were sent to Juarez , Mexico , to quell violence . `` Charging documents allege that Varela was attempting to buy a fully automatic M-60 machine gun for a drug cartel associate in Palomas , authorities said . Comment: ATF : U.S. authorities sharing intelligence with their Mexican counterparts .
Suspect is alleged leader network believed to be smuggling guns into Mexico . Last week , 2,000 Mexican troops were sent to Juarez , Mexico , to quell violence . Comment: ATF : U.S. authorities sharing intelligence with their Mexican counterparts .