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
Andrés Escobar Escobar (who was unrelated to Andrés). It is suggested in the program that, had Pablo Escobar still been alive, the Gallón brothers would not have targeted Andrés Escobar, as it was widely known that Pablo Escobar was a fervent supporter of the Colombian national football team. There are also allegations that the Gallón brothers bribed the Prosecutor's Office to redirect the investigation towards Muñoz as the triggerman – and the Prosecutor's Office contends that Muñoz was simply following orders from the Gallón brothers – but prosecutors lacked credible evidence to convict them. Pamela Cascardo, the girlfriend of Andrés Escobar, believes