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LawsuitsOpenAIサム・アルトマンBritish Columbia

British Columbia Sues OpenAI Over Alleged Failure to Warn Authorities About Mass Shooter

British Columbia and a local school district have filed a lawsuit against OpenAI and CEO Sam Altman, alleging that the company failed to warn law enforcement about a user who used ChatGPT to plan a mass shooting.

The lawsuit follows a February 2026 shooting at Tumbler Ridge Secondary School in British Columbia, which resulted in the deaths of five students, an education assistant, and the perpetrator. The complaint alleges that OpenAI’s automated monitoring systems identified the shooter’s account in June 2025 and that safety reviewers concluded the user posed a "credible and specific risk of gun violence." However, OpenAI leadership allegedly overruled the recommendation to notify the Royal Canadian Mounted Police (RCMP), opting instead to simply deactivate the account.

According to the complaint, this deactivation did not prevent the shooter from using a second account to facilitate the attack. The province argues that OpenAI's decision was driven by a desire to protect the company's valuation and avoid disclosing how its products might contribute to real-world threats. The legal action seeks to recover extraordinary costs incurred by the community for emergency response, mental health services, and the construction of a replacement school, as the original building was demolished due to the trauma.

OpenAI has declined to comment directly on the lawsuit but issued a statement describing the event as an "unspeakable tragedy" and affirming its commitment to working with government officials. In an earlier statement in April 2026, CEO Sam Altman apologized for failing to alert law enforcement regarding the account that was banned.

Sources

  1. Lawsuit demands OpenAI pay for new school after ChatGPT used in shooting (Ars Technica AI, 2026-09-22)
  2. complaint