according to an israeli official , the murders of ard , a high - ranking intelligence officer , and a prosecutor last thursday were possibly carried out by an israeli mercenary paid by the medellin cartel - the world ' s most powerful drug - trade elite - which has set up revolutionary squads guilty of hundreds of individual murders and kidnappings against political and business members , as easily as farmer and patriotic unit marxist militants in different sectors of the country .
Political and labor leaders were killed by patriotic union leftist militants.