BackLAW
Seven families file lawsuits against OpenAI in California over Tumbler Ridge shooting
Seven families of victims in a Canadian mass shooting filed lawsuits in California against OpenAI and CEO Sam Altman, alleging negligence and aiding and abetting by failing to alert authorities about the shooter’s ChatGPT activity. The action follows reports that the shooter’s ChatGPT interactions were flagged by OpenAI’s safety team, and comes as OpenAI advocates stronger safeguards and Altman issues an apology.
Why It Matters
The cases raise questions about liability and responsibility for AI tools inviolent acts, and they intersect cross-border legal actions with corporate governance and safety safeguards for AI platforms.
Timeline
4 Events
Florida criminal probe related to a separate university shooting
April 29, 2026
OpenAI is also facing a criminal probe in Florida related to the use of ChatGPT by a man accused of carrying out a shooting at Florida State University last year, which left two people dead and several others injured.
Seven families file lawsuits in California against OpenAI and Sam Altman
April 29, 2026
A joint legal team from the United States and Canada filed seven lawsuits in a California court accusing OpenAI and its senior leadership, including Sam Altman, of negligence and aiding and abetting the Tumbler Ridge mass shooting. The complaints reference that OpenAI’s 12-member safety team flagged the shooter’s conversations with ChatGPT and recommended reporting to the RCMP, but leadership vetoed the decision to alert authorities. The suits seek jury trials and also note that a Canadian lawsuit by Maya Gebala’s family is being replaced by the California actions; Gebala remains in hospital after being shot three times.
OpenAI publishes blog on handling potentially dangerous behavior on ChatGPT
April 28, 2026
OpenAI released a blog detailing how the company responds to users who display potentially dangerous behavior on ChatGPT and outlining safeguards and escalation processes.
Altman apologizes to families (open letter published)
April 22, 2026
OpenAI chief executive Sam Altman published an open letter apologizing to the families of the Tumbler Ridge victims for not alerting law enforcement after the shooter’s ChatGPT activity was flagged, acknowledging the harm and loss suffered by the community.