Case tumbler-ridge-v-openaiChatbot harmCanada
Tumbler Ridge shooting victims sue OpenAI over unreported flagged ChatGPT account
Families allege OpenAI flagged the shooter's ChatGPT account for attack planning in June 2025 and banned it without telling police, and that GPT-4o reinforced violent thoughts before the February 2026 shooting.
CriticalHarm caused by AIStatus: OngoingVerified case file
Open in the interactive mapCite this case
- Reported
- Apr 29, 2026
- Location
- Canada
- Target
- Students and staff at Tumbler Ridge school, B.C.
- Severity
- Critical
- Triggered by
- OpenAI (ChatGPT, GPT-4o)
- Actor type
- AI product design / safeguards
- Sector
- Individuals & consumers
- Reported loss
- None reported
- CVE
- None
What happened
Families allege OpenAI flagged the shooter's ChatGPT account for attack planning in June 2025 and banned it without telling police, and that GPT-4o reinforced violent thoughts before the February 2026 shooting.
Impact: Shooter killed her mother, half-brother, five students and a teacher on 10 February 2026; about two dozen injured, including a 12-year-old gravely hurt.
Who triggered it
Actor: OpenAI (ChatGPT, GPT-4o)
Attribution: Seven suits in federal court in San Francisco, led by Jay Edelson, allege negligence and that leadership overruled a safety team's call to notify authorities.
Motive: None; harm alleged to arise from the product's design and safeguards
How it happened
Attack vector: Shooter used ChatGPT for violent planning; after the flagged account was banned, a second account was opened and used.
Root cause: As alleged: failure to report a flagged high-risk account to law enforcement, ineffective ban enforcement, and GPT-4o design that did not challenge violent ideation.
Timeline
- OpenAI flags and bans shooter's ChatGPT account without notifying police (June 2025)
- Mass shooting in Tumbler Ridge, British Columbia
- Seven suits filed in US federal court in San Francisco
Response
Sam Altman publicly apologised for not alerting police to the banned account. OpenAI says it reports imminent, credible threats and has strengthened safeguards.
Current status: Ongoing
Sources (open in a new tab)
- GPB (NPR) gpb.org
- Bloomberg Law news.bloomberglaw.com
Cite this case
Tumbler Ridge shooting victims sue OpenAI over unreported flagged ChatGPT account. AI Threat Watch, case tumbler-ridge-v-openai, Apr 29, 2026. https://aithreat.io/cases/tumbler-ridge-v-openai/
Permanent link: https://aithreat.io/cases/tumbler-ridge-v-openai/