During Álvaro Uribe's second term as president, Petro encouraged debate on the Parapolitics scandal. In February 2007 Petro began a public verbal dispute with President Uribe when Petro suggested that the president should have recused himself from negotiating the demobilization process of paramilitaries in Colombia; this followed accusations that Uribe's brother, Santiago Uribe, was a former member of the Twelve Apostles paramilitary group in the mid-1990s. President Uribe responded by accusing Petro of being a "terrorist in civilian clothing" and by summoning the opposition to an open debate.[28]