Evelio Aguirre is a member of Sintracarbon. The trade union fights for the rights of workers of Cerrejón and the protection of the freedom of association. Following a meeting in Bogotá with members of Dutch trade union, CNV, the Dutch Embassy and executives from Cerrejón, Drummond and Grupo Prodeco-Glencore where they discussed the future of coal mining in the country, the six members of Sintracarbon present in the meeting received a pamphlet signed by paramilitary group "Aguilas Negras" threatening them and accusing them of being guerrilla group members.