British Columbia sues OpenAI in California over ChatGPT role in Tumbler Ridge shooting
British Columbia has filed a lawsuit against OpenAI in a California court, alleging the company failed to alert authorities after its own safety team flagged ChatGPT activity linked to the Tumbler Ridge mass shooting months before the attack. The legal action, announced on Monday, marks a significant escalation in the province's pursuit of accountability from the tech giant.
What is the lawsuit about?
The lawsuit stems from the February tragedy in Tumbler Ridge, a small mining town where 18-year-old Van Rootselaar killed eight people, first at her home, then at her former school. Media reports indicate that OpenAI's safety team had flagged Rootselaar's ChatGPT activity for references to gun violence months before the attack, but the company did not notify local authorities.
Attorney General Niki Sharma first signalled the province's intention to pursue legal action in July. Speaking about the case, Sharma said the goal is straightforward:
“Accountability and change.”
Why is British Columbia suing in California?
Sharma explained that California is the appropriate venue because that is where the alleged failure occurred.
“The decision not to report happened in California,”she said, laying out the province's core argument that the AI system knew something serious was unfolding in that chat and chose not to act on it.
There is also a strategic dimension to this choice. Canadian courts tend to award far smaller damages than their American counterparts, which may explain why British Columbia is pursuing this case stateside rather than at home.
What has OpenAI said about the case?
OpenAI has previously apologised for not flagging the ChatGPT account belonging to Rootselaar. In April, CEO Sam Altman wrote directly to the town, telling residents he was
“deeply sorry that we did not alert law enforcement to the account that was banned in June.”
The company's explanation has been that, at the moment the account was suspended, nothing pointed to an attack being imminent. However, OpenAI has since conceded that under security rules brought in after June 2025, that same account would now trigger a police report.
What do the grieving families allege?
British Columbia is not the only party pursuing legal action. Grieving families from Tumbler Ridge have separately filed lawsuits in California. OpenAI has responded by trying to get those cases dismissed, insisting they belong in Canadian courts instead.
The families allege that OpenAI's silence was not an accident but a calculated risk-avoidance move. Their argument suggests that flagging one dangerous account would create a precedent, potentially obligating the company to report thousands of similar accounts. They also claim OpenAI actively coaches suspended users on how to get back online, including workarounds for dodging the standard 30-day ban.
What happened in Tumbler Ridge?
The violence unfolded in a horrifying sequence. Van Rootselaar killed her mother and brother inside the family home before making her way to the local secondary school, where she opened fire and killed five students and a teacher. When police finally breached the building, they found she had turned the gun on herself.
What are the key questions around AI accountability?
This case raises fundamental questions about the responsibility of AI companies when their systems detect potential threats. Should companies be legally obligated to report suspicious activity to authorities? What threshold of concern should trigger such reporting?
Sharma noted she has not read the contents of the chats.
“We have asked OpenAI to disclose these chats. They have refused. We should all be asking them: Why?”she said.
The outcome of this case could set important precedents for how AI companies handle safety concerns and interact with law enforcement, not just in Canada and the United States, but globally.