Constitution of the Federative Republic of Brazil

TITLE ii - Fundamental Rights and Guarantees

CHAPTER i - individual and Collective Rights and Duties

Article 5. All persons are equal before the law, without any distinction whatsoever, Brazilians and foreigners residing in the country being ensured of inviolability of the right to life, to liberty, to equality, to security and to property, on the following terms:

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LXiii – the arrested person shall be informed of his rights, among which the right to remain silent,

Article 55
Rights of persons during an investigation
2. Where there are grounds to believe that a person has committed a crime within the jurisdiction of the Court and that person is about to be questioned either by the Prosecutor, or by national authorities pursuant to a request made under Part 9, that person shall also have the following rights of which he or she shall be informed prior to being questioned:
(b) To remain silent, without such silence being a consideration in the determination of guilt or innocence