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 the cluster of the 27 coral cluster islands comprising Islas del Rosario, located about from Cartagena. The compound, now half-demolished and overtaken by vegetation and wild animals, featured a mansion, apartments, courtyards, a large swimming pool, a helicopter landing pad, reinforced windows, tiled floors, and a large, unfinished building to the side of the mansion. 16 months after his escape from La Catedral, Pablo Escobar died in a shootout on 2 December 1993, amid another of Escobar's attempts to elude the Search Bloc. A Colombian electronic surveillance team, led by Brigadier Hugo Martínez, used radio trilateration technology to track his