Leila Zerrougui, an Algerian lawyer, and a United Nations working group interviewed more than 400 detainees for ten days. Zerrougui met detainees who "showed visible signs of torture," a tactic used to obtain confessions from suspects at two prisons in Luanda; Cacuaco Prison and Viana Prison. The working group concluded the Angolan government has imprisoned civilians in Cabinda military prison and Viana Immigration Detention Centre in Cabinda province, denying them access to a judge or legal representation, although the government denied the working group access to such facilities.[2]