São Gabriel da Palha, Espírito Santo: a 36-year-old farmer was held in pre-trial detention for 54 days after OpenAI reported his ChatGPT messages about killing his eight-year-old son to the FBI, which passed them to Brazilian authorities; a court released him on 13 August 2026 because the investigation had not been completed, with an ankle monitor and a ban on contacting the child, and no charges had been filed; he denies intending harm and his lawyer says he was talking nonsense to a chatbot
Over about two months in 2026 a 36-year-old farmer in rural São Gabriel da Palha, Espírito Santo, exchanged messages with ChatGPT that the Espírito Santo civil police describe as plans to kill his eight-year-old son, attack other people and kill himself; one message said he had offered 50,000 to someone to kill him and his son. OpenAI reported the messages to the FBI, which passed them through Brazil's Ministry of Justice cyber-operations laboratory to the state police on 16 June; the man was arrested on 19 June as he left home, a day before the date on which police believed the plan would be carried out. Police say what the platform provided was corroborated at the scene (four bottles of unidentified substances and a knotted rope were found) but that he denied intending to kill the child; his lawyer says he was talking nonsense to a chatbot and took no concrete step. After 54 days in custody a court granted habeas corpus on 13 August 2026 because the inquiry had not been concluded and no charges had been brought, imposing electronic monitoring and a ban on approaching or contacting his son and the child's mother. Police were still examining his phone and awaiting forensic results. OpenAI provided user details and his messages but not ChatGPT's replies and did not answer the BBC's question why; it told the BBC it may notify law enforcement when it detects a credible and imminent risk of harm to others. The case is recorded as an institutional response to AI use: the reported adverse consequence is the detention without charge, and the police account that the report prevented a planned killing is preserved as context.
AI involvement supported · Causal attribution supported · 4 sources, 2 underlying accounts · Added 23/09/2026