The firm operates in contentious, advisory, and corporate internal investigation spheres, standing out for its close client relationships and tailored solutions for a wide range of criminal law issues. Drawing on extensive professional experience and a solid legal foundation, Peret e Barros provides individualized and transparent services, strategically and effectively safeguarding its clients' interests in every specific situation.

In the contentious sphere, the firm assists clients from the initial investigation phase through, if necessary, criminal execution, representing them in criminal actions and appeals before the Higher Courts. It defends the interests of defendants, victims, or third parties involved in any criminal matter, whether individuals or legal entities. The firm also handles the negotiation and execution of criminal agreements, such as plea bargains and non-prosecution agreements, and represents clients before professional regulatory bodies (e.g., OAB, CRM, CREA) and internal disciplinary boards whenever the facts carry potential criminal relevance.

The firm also offers advisory and preventive services in criminal matters, including drafting legal opinions, managing crises, and developing governance policies and programs while addressing potential risks involved.

Peret e Barros has expertise in conducting corporate internal investigations to identify misconduct during professional activities, involving employees, suppliers, or business partners. These investigations are carried out with utmost discretion and in compliance with Brazilian law, and may involve collaboration with technical assistants (specialized firms) when necessary.