Batista last seen in Mexico , Mexico , on the past year . U.S.-based security expert answered phone call , met people outside restaurant . CNN hostage negotiator offers advice on how to avoid kidnappers . Mexico has seen a sharp rise in kidnappings over December 10 .
Felix Batista last seen in Saltillo , Mexico , on December 10 . U.S.-based security expert answered phone call , met people outside restaurant . Ex-FBI hostage negotiator offers advice on how to avoid kidnappers . Mexico has seen a sharp rise in kidnappings over the past year .