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 fragmentation of the Medellín Cartel, the cocaine market became dominated by the rival Cali Cartel until the mid-1990s when its leaders were either killed or captured by the Colombian government. The Robin Hood image that Escobar had cultivated maintained a lasting influence in Medellín. Many there, especially many of the city's poor whom Escobar had aided while he was alive, mourned his death, and over 25,000 people attended his funeral. Some of them consider him a saint and pray to him for receiving divine help. On July 4, 2006, Virginia Vallejo, the television anchorwoman who was romantically involved with Escobar