Operation Saturno Takes Banco Master to Brazil’s Top Court
Brazil · BANKING
Key Facts
- —What happened Brazil’s top court now supervises a police inquiry linking drug money to Banco Master.
- —How big Coaf reports say R$48 billion (US$9.3 billion) moved through accounts over five years.
- —The real story The inquiry asks whether drug money passed through accounts tied to the bank.
- —The catch The figure measures money moving through accounts, not money stolen or laundered.
- —Who is named Victor Shimada, a black-market currency dealer, is cited in the documents; no court has ruled.
- —What comes next A prosecutor must decide whether to file a formal accusation.
A São Paulo police inquiry into drug money has reached Brazil’s highest court. With investigators alleging a link to Banco Master and state pension fraud.
Operation Saturno, a São Paulo state police investigation into drug trafficking and money laundering, has reached Brazil’s Supreme Federal Court. The inquiry, reported by Gazeta do Povo on 24 August 2026.
Allegedly connects drug money to frauds involving Banco Master and INSS pensions.
What Is Operation Saturno?
Operation Saturno, meaning Operation Saturn, is a police investigation into drug trafficking and money laundering; in fact, it targets both crimes. It began in 2024, according to Gazeta do Povo, and involves the São Paulo civil police.
The investigation reached Brazil’s Supreme Federal Court, known as the STF, in August 2026. Justice André Mendonça supervises the inquiry, as reported by Gazeta do Povo.
The investigation is also known as Operação Saturno in Portuguese. Gazeta do Povo reports that it detected connections between drug trafficking and frauds involving Banco Master and INSS pensions.
The inquiry was transferred to the STF because it involves people with parliamentary privilege. However, no case number was published in the reporting used.
The Alleged Link to Banco Master
Investigators allege that Banco Master, a mid-sized Brazilian bank, served as a platform for channelling organised crime funds, according to Estadão. This is an allegation by investigators, not a court ruling.
The scheme documents cite Banco Master; however, no court has ruled on the matter. The bank is at the centre of what Brazilian reporting calls the country’s largest banking fraud case, but this strand is separate.
The INSS is Brazil’s national social security institute, which pays state pensions. The alleged link is part of the same investigation, according to Gazeta do Povo.
Investigators allege the bank channeled funds, but no court has ruled. Meanwhile, the wider Master case includes asset freezes and secrecy lifts from January 2026.
What the 48 Billion Figure Measures
Gazeta do Povo reports that investigators traced a network of accounts, front companies and individuals. In addition, they moved around R$48 billion (US$9.3 billion) over five years.
This is the total money that passed through the accounts, not a loss or a proven laundered sum. The figure is a single network total, spanning both the Banco Master frauds and the INSS pension frauds together.
It is not split into separate amounts for each case. The figure comes from Coaf reports, which record money movement but are not evidence of a crime on their own.
As a result, the total is not a finding of guilt. The total is based on Coaf reports, which are not evidence alone.
Still, the figure is not a loss, theft, or proven laundered sum.
A Second, Different Total
In addition, Estadão, in July 2026, reported a separate figure: total account movement exceeded R$49 billion (US$9.49 billion). This comes from a different report and a different measurement.
The two totals should never be added together or averaged. They are distinct figures from distinct sources.
Estadão reported that the total movement of the accounts analysed exceeded R$49 billion (US$9.49 billion). This figure is separate from the Gazeta do Povo total and should not be combined.
Estadão’s figure comes from a separate police strand. Therefore, the two totals must never be added or averaged.
The Police Origin and the PCC
According to Estadão, Denarc discovered a PCC money laundering scheme in July 2025; meanwhile, the investigation continues. The PCC is Brazil’s largest organised crime group, founded in São Paulo prisons in 1993.
Investigators asked courts for a financial intelligence report. As a result, it revealed a ‘grandiose money laundering scheme’ engineered by faction leaders, as quoted by Estadão.
This is the investigators’ wording, not a finding of fact. Denarc is the São Paulo state police narcotics investigation department, as defined in the research.
The PCC is the Primeiro Comando da Capital, Brazil’s largest organized crime group, founded in 1993. Denarc discovered the scheme in July 2025, per Estadão.
However, Gazeta do Povo says the investigation began in 2024.
The Role of the Supreme Federal Court
The inquiry was sent to the Supreme Federal Court because it touches on people with parliamentary or ministerial privilege. Therefore, a state police inquiry can be transferred there.
Justice André Mendonça is the rapporteur of the Master case at the STF, according to G1. He manages the case and rules on procedural steps, but he has not decided on the merits.
The court received the inquiry and assigned a rapporteur, but no case number was published in the reporting used. The STF is Brazil’s highest court, handling criminal matters involving privileged individuals.
Justice Mendonça supervises the inquiry, but he has not ruled on its merits. The court received the inquiry and assigned a rapporteur.
However, it has not opened a criminal case or made any ruling.
Who Is Named in the Investigation?
The case documents cite Victor Henrique de Oliveira Shimada, a doleiro, or black-market currency dealer, according to Estadão. He is cited as a person in the investigation.
Despite this, no response from him or his lawyers appears in the research. No one has been formally accused in this strand, and no arrests or charges have been reported.
Victor Henrique de Oliveira Shimada is cited in the case documents, but his role is not defined. No court has ruled on his conduct.
Shimada is cited in the documents, but his role is unspecified. No court has ruled on his conduct.
The Financial Intelligence Trail
Because of the scale, investigators asked for a Relatório de Inteligência Financeira, a financial intelligence report from Coaf, Brazil’s financial intelligence unit. Coaf compiles reports on unusual transactions, which are not evidence of a crime on their own.
The report revealed a scheme to launder money through real companies, according to investigators. This is part of the inquiry, not a court finding.
Coaf compiles reports on unusual transactions, which are not evidence of a crime on their own. The report revealed a scheme, but it is an allegation by investigators.
The report is an allegation by investigators, not a court finding. Meanwhile, Coaf reports only record money movement, not guilt.
What Happens Next
The inquiry is now under the supervision of Justice Mendonça at the Supreme Federal Court. A prosecutor must later decide whether to file a denúncia, a formal accusation, to turn the investigation into a criminal case.
So far, no such step has been reported. The investigation continues, and the figures remain allegations under review.
The inquiry is under supervision, but no formal accusation has been filed. A prosecutor must decide whether to file a denúncia, which would turn the investigation into a criminal case.
No formal accusation has been filed in this strand. As a result, the investigation continues under review.
Frequently Asked Questions
What is Operation Saturno?
Operation Saturno is a São Paulo state police investigation into drug trafficking and money laundering. It allegedly connects drug money to frauds involving Banco Master and INSS pensions, and it has reached Brazil’s Supreme Federal Court.
Is the R$48 billion (US$9.3 billion) figure a proven laundered sum?
No. The R$48 billion (US$9.3 billion) is the total money that moved through a network of accounts over five years. According to Coaf reports cited by Gazeta do Povo.
Has anyone been charged in this investigation?
No. The reports speak of an investigation and a transfer of files, but no formal accusations or charges have been reported. No one has been named as a defendant in this strand.
Who is Justice André Mendonça?
Justice André Mendonça is a judge of Brazil’s Supreme Federal Court. He is the rapporteur of the Master case at the STF, meaning he manages the case and rules on procedural steps.
Connected Coverage
Sources: Gazeta do Povo; Estadão; G1; Agência Brasil; Coaf; Supremo Tribunal Federal.
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