It is alleged that Escobar backed the 1985 storming of the Colombian Supreme Court by left-wing guerrillas from the 19th of April Movement, also known as M-19. The siege, a retaliation motivated by the Supreme Court studying the constitutionality of Colombia's extradition treaty with the U.S., resulted in the murders of half the judges on the court. M-19 was paid to break into the Palace and burn all papers and files on Los Extraditables, a group of cocaine smugglers who were under threat of being extradited to the U.S. by the Colombian government. Escobar was listed as a part of Los Extraditables. Hostages were also taken for negotiation of their release, thus helping to prevent the extradition of Los Extraditables to the U.S. for their crimes.
The Betancur administration in turn questioned the M-19's actions and its commitment to the peace process, as it continued to advance high-profile negotiations against with the FARC, which led to the creation of the Patriotic Union (Unión Patriótica) -UP-, a legal and non-clandestine political organization.
On November 6, 1985, the M-19 stormed the Colombian Palace of Justice and held the Supreme Court magistrates hostage, intending to put president Betancur on trial. In the ensuing crossfire that followed the military's reaction, some 120 people lost their lives, as did most of the guerrillas, including several high-ranking operatives and 12 Supreme Court Judges. Both sides blamed each other for the outcome. This marked the end of Betancur's peace process.
The Armero tragedy was one of the major consequences of the eruption of the Nevado del Ruiz stratovolcano in Tolima, Colombia, on November 13, 1985. The lahars picked up speed in gullies and engulfed the town of Armero, killing more than 20,000 of its almost 29,000 inhabitants. Casualties in other towns, particularly Chinchiná, brought the overall death toll to 23,000.