Suspect is a leader network believed to be smuggling drugs into Mexico . Last week , 2,000 Mexican troops were sent to Guadalajara , Mexico , to prevent violence . Mexican drug cartels responsible for killings of police officers . ATF : U.S. military 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 . Mexican drug cartels blamed for killings of police officers . ATF : U.S. authorities sharing intelligence with their Mexican counterparts .