the assassination of efrain , a high - respected police officer , and a judge last sunday , were probably carried out by an israeli mercenary paid by the medellin cartel - the world ' s most powerful drug - trafficking boss - which has set up paramilitary squads accused of hundreds of individual deaths and massacres against civil and labor leaders , as best as peasants and student union leftist militants in different parts of the country .
Galan was killed by patriotic union leftist militants.