The AUC committed numerous atrocities and massacres against presumed guerrilla members and the civilian population. Mancuso was initially jailed in a Maximum Security Prison in Itagüí, Antioquia after a peace process that led to his demobilization and then transferred to a prison in the city of Cúcuta to help establish the whereabouts of some of the victims. In a surprise move by the Colombian government, Mancuso, along with 13 other top members of the AUC was extradited to the United States to stand trial on drug trafficking charges.