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Low reported severity Investigation Opened

São Luís (Brazil): Federal Police arrest Bar exam candidate they say used a phone linked to an AI tool to cheat

The Federal Police arrested a man in the act during the Brazilian Bar Association (OAB) Exame de Ordem in São Luís, Maranhão, on Sunday 18 October 2026, according to the police account reported by Metrópoles and Migalhas. Police say officers sent to the exam venue after a criminal complaint about possible fraud found him using a mobile phone integrated with an artificial-intelligence tool to cheat. He was booked in the act for fraud in an exam of public interest and released after paying bail. Police said the investigation continues into the extent of the attempt and whether others took part. The reports do not name the AI tool, say whether it produced answers, or report an exam disqualification or charging decision.

AI system
Unidentified AI tool
Occurred
18 Oct 2026
Reported
19 October 2026
Event location
Brazil
What the AI did
Relation unknown
Reported harm
Legal Harm
Whose AI use
Their own AI use
Setting
Education · Justice
Evidence
AI involvement reported · Causal attribution supported · 2 sources, 1 underlying account
3 claims: 3 reported. 4 open questions
People reported harmed
1 person

AI system as recorded: An unnamed artificial-intelligence tool integrated with a mobile phone that, according to the Federal Police, the candidate used to cheat during the exam; no reports name the tool or describe its output

What Happened

The arrest. On Sunday 18 October 2026 the Federal Police arrested a man in the act during the Exame de Ordem, the Brazilian Bar Association's admission exam, in São Luís, Maranhão, according to the police account reported on 19 October by Metrópoles and Migalhas (Migalhas credits the Federal Police for its information).

The AI tool. Police say he was using a mobile phone integrated with an artificial-intelligence tool to cheat in the exam. The reports do not name the tool or say whether it produced answers.

How it was found. The police action began after a criminal complaint (notícia-crime) about possible fraud during the exam; officers went to the venue and, during their inspection, identified the use of the phone.

Charge and release. He was taken to the Federal Police superintendency in São Luís, booked in the act for fraud in an exam of public interest, and released after paying bail. Police said the investigation continues to establish the extent of the attempt and whether others took part.

Reported harm

According to the Federal Police, a Bar exam candidate who used a phone integrated with an AI tool to cheat was arrested in the act, booked for fraud in an exam of public interest and released on bail.

How Harm Occurred

According to the Federal Police, the candidate used a phone integrated with an AI tool to cheat in the Bar exam; officers acting on a complaint caught him at the venue, and he was arrested, booked for fraud in an exam of public interest and released on bail.

Outcome

Ongoing

Booked in the act (autuado em flagrante) for fraud in an exam of public interest at the Federal Police superintendency in São Luís and released after paying bail; police said the investigation continues. No charging decision, exam disqualification or OAB measure is reported.

What remains unknown

  • Which AI tool he used and whether it produced any answers.
  • Whether his exam was annulled or the OAB took any measure.
  • Whether prosecutors charge him and what a court decides.
  • Whether others took part.

What the evidence supports

AI involvement: reported. The Federal Police say the candidate used a mobile phone integrated with an artificial-intelligence tool to cheat in the Bar exam, and they arrested and booked him for that conduct. The arrest is the authorities' response to his AI use. No answer or other output of the tool is described, so no relation describing the AI system's own output toward him is recorded. The tool is not named.

3 claims: 3 reported. What the statuses mean

Reported According to the Federal Police, on Sunday 18 October 2026 they arrested in the act a candidate in the Brazilian Bar Association's Exame de Ordem in São Luís, Maranhão, booked him for fraud in an exam of public interest, and released him after he paid bail.

Causal attribution. The Federal Police account relayed by two outlets from one origin; the arrest and booking are the police action; reported.

  • metropoles.com(opens in new tab) supports · Portuguese
    'A Polícia Federal (PF) prendeu em flagrante, nesse domingo (18/10), um homem suspeito de tentar fraudar o Exame de Ordem da Ordem dos Advogados do Brasil (OAB), em São Luís'; 'Ele foi autuado em flagrante pelo crime de fraude em certame de interesse público.'; 'Após o pagamento da fiança, o suspeito foi colocado em liberdade.'
  • migalhas.com.br(opens in new tab) supports · Portuguese
    'A Polícia Federal prendeu em flagrante, neste domingo, 18, um candidato suspeito de utilizar inteligência artificial para fraudar o Exame de Ordem da OAB, em São Luís/MA.'; 'O homem foi liberado após o pagamento da fiança estipulada.'
Reported According to the Federal Police, the candidate was using a mobile phone integrated with an artificial-intelligence tool to cheat in the exam, and officers identified the phone's use during their inspection at the venue.

Causal attribution. The Federal Police finding relayed from one origin; the tool and any output are not described; reported.

  • metropoles.com(opens in new tab) supports · Portuguese
    'Segundo a corporação, ele utilizava um celular integrado a uma ferramenta de inteligência artificial (IA) para colar na prova.'; 'Durante a fiscalização, identificaram o uso do aparelho celular.'
  • migalhas.com.br(opens in new tab) supports · Portuguese
    'Segundo a PF, o homem foi identificado durante fiscalização no local de aplicação da prova, quando os agentes constataram o uso de um aparelho celular integrado a uma ferramenta de IA para tentar obter vantagem no exame.'
Reported According to the Federal Police, the action began after a criminal complaint about possible fraud during the exam, and the investigation continues into the extent of the attempt and whether others took part.

Causal attribution. Police account; reported.

  • metropoles.com(opens in new tab) supports · Portuguese
    'A investigação começou após a PF receber uma notícia-crime sobre uma possível fraude durante a aplicação do exame.'; 'As investigações continuam para esclarecer a extensão da tentativa de fraude, verificar se outras pessoas participaram do caso'
  • migalhas.com.br(opens in new tab) supports · Portuguese
    'A atuação policial teve início após o recebimento de uma notícia-crime que apontava a possibilidade de irregularidades durante a realização da prova.'

Sources

2 sources inspected, from 1 underlying account. Sources that repeat one account do not corroborate each other.

How the sources were read, and where the events happened

Read in Portuguese on 2026-10-24 from the publisher page (HTTP 200); translated by the research agent (an AI); no human translator reviewed it. Metrópoles column item of 19 October 2026 relaying the Federal Police account ('Segundo a corporação'). Applies to s1.

Read in Portuguese on 2026-10-24 from the publisher page (HTTP 200); translated by the research agent (an AI); no human translator reviewed it. Migalhas item of 19 October 2026, which credits its information to the Federal Police ('Informações: Polícia Federal'); same origin as s1. Applies to s2.

Event countries: Brazil. Affected-person countries: Unknown. Court countries: Unknown.

The exam sitting and the arrest took place in São Luís, Maranhão, Brazil, according to both reports. Where the candidate lives is not stated.

Reviewed for publication 2026-10-24: Published as a response to prohibited AI use: the Federal Police say a Bar exam candidate used a phone integrated with an AI tool to cheat, and they arrested, booked and bailed him. The account rests on one police origin, and no AI output is described. He is not identified.

People described

A candidate in the Brazilian Bar Association exam arrested by the Federal Police; not named in the reports

People reported harmed in this case

1 person

1 AI participant · 0 other people harmed

One candidate arrested and booked, according to the Federal Police account relayed by Metrópoles and Migalhas. Police say he used the AI tool himself, so he is counted among participant users.

Counted once within this case. The same person may appear in other cases. This count does not establish AI causation.

Tags

#exam-cheating#bar-exam#federal-police#arrest#consequential-response#brazil

Cite this case

Compiled per our published methodology: verification statuses, sourcing standards, and corrections process.

APA

NOPE. (2026). São Luís (Brazil): Federal Police arrest Bar exam candidate they say used a phone linked to an AI tool to cheat. AI incidents. https://nope.net/incidents/2026-sao-luis-brazil-federal-police-arrest-bar-exam-candidate-over-phone-linked-to-ai-tool

BibTeX

@misc{2026_sao_luis_brazil_federal_police_arrest_bar_exam_candidate_over_phone_linked_to_ai_tool,
  title = {São Luís (Brazil): Federal Police arrest Bar exam candidate they say used a phone linked to an AI tool to cheat},
  author = {NOPE},
  year = {2026},
  howpublished = {AI incidents},
  url = {https://nope.net/incidents/2026-sao-luis-brazil-federal-police-arrest-bar-exam-candidate-over-phone-linked-to-ai-tool}
}

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