the murders of galan , a higher - ranking police detective , and a judge past week , were apparently carried out by an israeli mercenaries paid by the medellin cartel - the country ' s most powerful drug - using mafia - which has built up paramilitary clinics capable of clusters of total murders and massacres against politically and labor groups , as well as peasants and patriotic or leftist militants in different parts of the nation .
Galan was killed by patriotic union leftist militants.