«They come shooting…». Amnesty International, The maintenance of order at the heart of socially excluded populations, report of 2005.
web.amnesty.org
«Brazil: Caveirão – Rio’s real "bogeyman"». Amnesty International. 13 de marzo de 2006. Archivado desde el original el 7 de diciembre de 2007. Consultado el 19 de septiembre de 2008. «"The caveirão has become a powerful symbol of the failings of public security policies in Rio de Janeiro. It typifies the police's confrontational and divisive approach to Rio's public security crisis," said Marcelo Freixo of Global Justice at the launch of a campaign against the use of the Caveirão in Brazil's favelas.»
«Brazil: Caveirão – Rio’s real "bogeyman"». Amnesty International. 13 de marzo de 2006. Archivado desde el original el 7 de diciembre de 2007. Consultado el 19 de septiembre de 2008. «"The caveirão has become a powerful symbol of the failings of public security policies in Rio de Janeiro. It typifies the police's confrontational and divisive approach to Rio's public security crisis," said Marcelo Freixo of Global Justice at the launch of a campaign against the use of the Caveirão in Brazil's favelas.»