Jose Alberto Lopez Barron arrested in connection with murder of 12 police agents . Mexican officials : Lopez Barron a top leader of La Familia Mexican drug cartel . ` ` You ca n't go around shooting off guns , '' suspect tells reporters . You ca n't traffick any kinds of drugs without telling us first . '' Anyone who wants to sell drugs has to go through cartel , Lopez Barron says .
Jose Alberto Lopez Barron arrested in connection with murder of 12 police agents . Mexican officials : Lopez Barron a top leader of La Familia Mexican drug cartel . ` ` You ca n't go around shooting off guns , '' suspect tells reporters . Anyone who wants to sell drugs has to go through cartel , Lopez Barron says .