Lawyer (Brazilian Bar Association OAB/SP 67.277), speaker, columnist and writer.

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Internationally recognized among the best criminal lawyers in the country by publications such as the North American Best Lawyers (best in Corporate Criminal Law), the French Leaders League (highly recommended in White-Collar Crime), the British Chambers & Partners (recognized in Dispute Resolution: White -Collar Crime), who state: "David is recognized by commentators for his academic track record and activity advising clients on the full range of criminal matters. A source highlights that 'he is very respected among peers,' while another adds: 'He is technically very good and handles some strategic cases '."

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Juris Doctor (USP/81), Master of Laws (USP/84), PhD (USP/94) and Full Professor (USP/13); specialist in Economic and European Criminal Law by the University of Coimbra and the Brazilian Institute of Criminal Sciences.

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Professor of Criminal Law at University of São Paulo/USP, he is the author and coauthor of numerous doctrinal works on Criminal Law, among which "Dosimetria da Pena - Causas de Aumento e Diminuição" , by Malheiros Editores, in 1998; “Atualidades em Direito e Processo Penal” , by Editora Método, in 2009; in addition to coordinating  “The Interpreted Brazilian Penal Code - Article by article, paragraph by paragraph”, already in its 10th edition, by Editora Manole.

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He is the former president of the Institute of Christian Jurists of Brazil; former president of the Manoel Pedro Pimentel Institute, linked to USP's Department of Criminal Law and Forensic Medicine; former vice-president of the OAB/SP Rights and Prerogatives Committee; member of the OAB/SP Law and Religious Liberty Committee; former member of the OAB/SP Human Rights Committee; former member of public tender boards; former member of legislative reform Committee; member of the Witness Protection Program (Provita), of the Secretariat of Justice and Defense of Citizenship of the Government of the State of São Paulo.