Colombian conflict dialogue, but President Barco sent an ultimatum to the guerrillas and demanded that they immediately disarm or face military retaliation. Regional guerrilla and Army skirmishes created a situation where each violation of the ceasefire rendered it null in each location, until it was rendered practically nonexistent. By 1990, at least 2,500 members of the FARC-founded Patriotic Union had been murdered, according to historian Daniel Pecáut, leading up to that year's assassination of presidential candidate Bernardo Jaramillo Ossa. The Colombian government initially blamed drug lord Pablo Escobar for the murder but journalist Steven Dudley argues that many in the UP pointed
Pablo Escobar gunfight or as part of a possible execution, with wide speculation remaining regarding the subject. Some of Escobar's relatives believe that he had committed suicide. His two brothers, Roberto Escobar and Fernando Sánchez Arellano, believe that he shot himself through the ear. In a statement regarding the topic, the duo stated that Pablo "had committed suicide, he did not get killed. During all the years they went after him, he would say to me every day that if he was really cornered without a way out, he would 'shoot himself through the ear'." Soon after Escobar's death and the subsequent