The deadly school shooting in the remote Canadian community of Tumbler Ridge has revealed a stark dilemma for artificial intelligence companies, after OpenAI disclosed it had previously identified and banned the perpetrator’s account for discussing violent scenarios.
Jesse Van Rootselaar, an 18-year-old former student, killed nine people last week in British Columbia. According to the Royal Canadian Mounted Police (RCMP), she first murdered her mother, Jennifer Strang, also known as Jennifer Jacobs, and her 11-year-old stepbrother, Emmett Jacobs, at the family home before attacking Tumbler Ridge Secondary School. Van Rootselaar died at the scene from a self-inflicted gunshot wound.
The victims at the school included a 39-year-old education assistant and six students aged 12 to 13, with more than 25 people injured in total, police said.
In a statement, OpenAI confirmed that months earlier, in June 2025, its abuse detection systems had flagged Van Rootselaar’s ChatGPT account for “furtherance of violent activities”. The company said automated systems and human review identified interactions over several days involving violent scenarios, including gun violence.
Approximately a dozen employees at the San Francisco-based firm then debated whether to refer the account to the RCMP, OpenAI said. The company ultimately decided against it, determining the activity did not meet its internal threshold for law enforcement referral, which requires an “imminent and credible risk of serious physical harm to others”. OpenAI banned the account in June 2025 for violating its usage policies.
Following the tragedy, OpenAI proactively contacted the RCMP with information regarding Van Rootselaar and her use of ChatGPT, a move the police force confirmed.
Van Rootselaar had a documented history of mental health-related contacts with police, according to the RCMP. Authorities had visited the family residence on multiple occasions over several years, and she had been apprehended for assessment under the Mental Health Act, with the last contact reported in the spring of 2025.
She was a former student at Tumbler Ridge Secondary, having dropped out about four years prior to the shooting. Van Rootselaar, who was born biologically male and had been transitioning to female for approximately six years, held a firearms licence that had expired in 2024. No firearms were registered in her name at the time of the attack.
Police recovered a long gun and a modified rifle or handgun at the scene. An unregistered shotgun, used in the homicides at the home, is of unknown origin, while the primary firearm used at the school had never been seized by authorities.
The motive for the shooting remains unclear, and misinformation circulated online regarding the shooter’s identity in the aftermath, the research briefing noted.
Tumbler Ridge, a town of roughly 2,700 people situated over 1,000 kilometres northeast of Vancouver near the Alberta border, is now the site of Canada’s deadliest rampage since 2020. That year, a gunman in Nova Scotia killed 13 people and set fires that left another nine dead. The Tumbler Ridge attack is also the nation’s deadliest school shooting since the 1989 École Polytechnique massacre in Montreal.
Such incidents are rare in Canada, which has stringent gun control laws including a broadened ban on assault-style weapons. The case highlights the persistent challenges for AI companies in content moderation, balancing user privacy with public safety and defining thresholds for reporting potentially harmful content to authorities.
OpenAI’s usage policies prohibit illicit activities, including exploiting or endangering minors and generating child sexual abuse material. The company states it monitors for violations, bans offending users, and reports such material to the National Center for Missing and Exploited Children, maintaining that its benchmark for involving law enforcement is an imminent and credible risk of serious physical harm.
