Brazil Supreme Court Kills Probe That Threatened Its Own Justices

The Brazil Supreme Court shut down the congressional investigation into INSS pension fraud on Thursday, voting 8-2 to overturn Justice André Mendonça’s order extending the inquiry by 60 days. The Rio Times, the Latin American financial news outlet, reports that the ruling effectively ends the most politically charged investigation in Brasília — one that had expanded far beyond pension fraud into the Banco Master banking scandal and touched sitting justices of the court itself.

The CPMI, a joint congressional inquiry commission, must now cease operations by Saturday, March 28. Senate president Davi Alcolumbre had refused for months to process the opposition’s request for an extension, and the majority of justices ruled that the decision to extend belongs to the legislature, not the judiciary.

Why the Court Intervened Against Its Own Justice

Mendonça, who also serves as the STF’s lead investigator on both the INSS fraud and the Banco Master case, had ordered Alcolumbre to act within 48 hours on the extension request. When the Senate president ignored the order, the CPMI chairman Senator Carlos Viana declared a 120-day extension himself. Mendonça then sent the matter to the full court for review — where his colleagues overwhelmingly rejected his position.

Only Justice Luiz Fux sided with Mendonça, arguing that minority rights to create a CPI should also extend to renewing one. The remaining eight justices — including Moraes, Dino, Toffoli, Zanin, Nunes Marques, and Cármen Lúcia — disagreed, establishing that congressional inquiry extensions are a political prerogative of the legislative majority.

The Banco Master Shadow Over the Brazil Supreme Court

What made the CPMI explosive was not the pension fraud itself — estimated in the billions of reais — but its expansion into the Banco Master affair. After police seized phones belonging to bank founder Daniel Vorcaro, the CPI obtained the data and leaked private messages that allegedly showed financial relationships between Vorcaro and the families of Justices Moraes and Toffoli.

Justice Gilmar Mendes, the court’s longest-serving member, called the leak “criminal” and “abominable,” accusing the CPI of conducting mass data breaches without legal justification. Moraes agreed, and both justices voted to end the inquiry. The opposition argued that shutting down the CPI protects Moraes and Toffoli from further scrutiny — a charge the court did not address directly.

Hidden Messages in the Ruling

Several justices used the session to send signals beyond the immediate case. Dino warned that open-ended investigations without time limits are “typical of authoritarian regimes” and enable fishing expeditions for evidence. Gilmar Mendes recommended that “eternal inquiries” be shut down — a comment widely interpreted as aimed at Moraes’s fake news inquiry, which has been running since 2019 without a defined endpoint.

The ruling also clears a path for Justice Dino’s earlier decision to annul the CPI’s mass surveillance orders, which had targeted Lula’s son Fábio Luís Lula da Silva among others. Opposition lawmakers including Nikolas Ferreira and Bia Kicis, who attended the session, accused the court of protecting the president’s family and the justices’ own interests.

The INSS fraud investigation is not over — Mendonça retains the criminal case at the STF, and evidence can be forwarded to federal prosecutors and the police. But the political theater of a congressional probe, with its public hearings and capacity to embarrass the powerful, ends Saturday.