Based on the systematic follow-up of the jurisprudence of the Brazilian Supreme Court (Supremo Tribunal Federal), which defines the extent of Brazilian constitutional law ,the team of Leitte, Gonçalves & Oliveira Jr. guides the clients in relation to the constitutionality of laws or statutes through the drafting of legal opinions and reports on specific topics and, they defend clients engaged in litigations in which violations of the Federal Constitution are discussed.