OpenAI said it reviewed a user account months before a deadly school shooting in British Columbia.
Its safety systems flagged the account in June for possible “furtherance of violent activities”.
The user was later identified as Jesse Van Rootselaar.
The company considered contacting the Royal Canadian Mounted Police.
It decided the activity did not meet the threshold for referral.
That standard requires a credible and imminent risk of serious harm.
Last week the 18-year-old killed eight people in Tumbler Ridge before dying from a self-inflicted gunshot wound.
Police said the victims included a teaching assistant and five students aged 12 to 13.
The motive remains unclear.
After the attack, OpenAI proactively shared information with investigators.
The company said it would continue to support the inquiry.
Authorities confirmed the suspect previously had mental-health-related contact with police.
The shooting is Canada’s deadliest mass killing since the 2020 Nova Scotia attacks.
